Develop Reference

Spring Data AWS DynamoDB Repository Find By Contains throws ClassCastException

I have an AWS DynamoDB Table called Group Table. It contains two fields ID and Members. The members field is a String Set. I would like to search the Group Table and return all Groups where the list of members contains a specified string.
When I attempt this using Spring Data's CRUD Repository FindByMembersContains, it returns a ClassCastException stating java.lang.String cannot be cast to java.util.Collection.
I have also attempted with a String List instead of String Set and get the same results.
I am using AWS Java SDK DynamoDB version 1.12.192 and Spring Data DynamoDB version 5.1.0.
I have no issues writing these entries or reading by ID using the repository.
Group.java
#DynamoDBTable(tableName = "GroupTable")
public class Group {
String id;
Set<String> members;
#DynamoDBHashKey
#DynamoDBAutoGeneratedKey
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
#DynamoDBAttribute
public Set<String> getMembers() {
return members;
}
public void setMembers(Set<String> members) {
this.members = members;
}
}
GroupRepository.java
#EnableScan
public interface GroupRepository extends CrudRepository<Group, String> {
List<Group> findByMembersContaining(String member);
}
GroupController.java
#RestController
#RequestMapping("/group")
public class GroupController {
private final GroupRepository groupRepository;
public GroupController(GroupRepository groupRepository) {
this.groupRepository = groupRepository;
}
#GetMapping("/test")
public List<Group> getTestGroups() {
String testMemberId = "SomeMemberId";
return groupRepository.findByMembersContaining(testMemberId);
}
}
DynamoDBConfig.java
#Configuration
#EnableDynamoDBRepositories(basePackages = "com.example.dynamodbtest.repository")
public class DynamoDBConfig {
#Value("${amazon.dynamodb.endpoint}")
private String amazonDynamoDBEndpoint;
#Value("${amazon.aws.accesskey}")
private String amazonAWSAccessKey;
#Value("${amazon.aws.secretkey}")
private String amazonAWSSecretKey;
private final ApplicationContext context;
public DynamoDBConfig(ApplicationContext context) {
this.context = context;
}
#Bean
public AmazonDynamoDB amazonDynamoDB() {
AmazonDynamoDB amazonDynamoDB = new AmazonDynamoDBClient(amazonAWSCredentials());
if (!ObjectUtils.isEmpty(amazonDynamoDBEndpoint)) {
amazonDynamoDB.setEndpoint(amazonDynamoDBEndpoint);
}
return amazonDynamoDB;
}
#Bean
public AWSCredentials amazonAWSCredentials() {
return new BasicAWSCredentials(amazonAWSAccessKey, amazonAWSSecretKey);
}
#Bean(name = "mvcHandlerMappingIntrospectorCustom")
public HandlerMappingIntrospector mvcHandlerMappingIntrospectorCustom() {
HandlerMappingIntrospector handlerMappingIntrospector = new HandlerMappingIntrospector();
handlerMappingIntrospector.setApplicationContext(context);
return handlerMappingIntrospector;
}
}
Stack Trace
java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Collection
at com.amazonaws.services.dynamodbv2.datamodeling.StandardTypeConverters$Vector$ToSet$1.convert(StandardTypeConverters.java:449) ~[aws-java-sdk-dynamodb-1.12.192.jar:na]
at com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBTypeConverter$DelegateConverter.convert(DynamoDBTypeConverter.java:104) ~[aws-java-sdk-dynamodb-1.12.192.jar:na]
at com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBTypeConverter$NullSafeConverter.convert(DynamoDBTypeConverter.java:123) ~[aws-java-sdk-dynamodb-1.12.192.jar:na]
at com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBTypeConverter$ExtendedConverter.convert(DynamoDBTypeConverter.java:83) ~[aws-java-sdk-dynamodb-1.12.192.jar:na]
at com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapperFieldModel.convert(DynamoDBMapperFieldModel.java:138) ~[aws-java-sdk-dynamodb-1.12.192.jar:na]
at org.socialsignin.spring.data.dynamodb.repository.query.AbstractDynamoDBQueryCriteria.getPropertyAttributeValue(AbstractDynamoDBQueryCriteria.java:499) ~[spring-data-dynamodb-5.1.0.jar:5.1.0]
at org.socialsignin.spring.data.dynamodb.repository.query.AbstractDynamoDBQueryCriteria.createSingleValueCondition(AbstractDynamoDBQueryCriteria.java:648) ~[spring-data-dynamodb-5.1.0.jar:5.1.0]
at org.socialsignin.spring.data.dynamodb.repository.query.AbstractDynamoDBQueryCriteria.withSingleValueCriteria(AbstractDynamoDBQueryCriteria.java:427) ~[spring-data-dynamodb-5.1.0.jar:5.1.0]
at org.socialsignin.spring.data.dynamodb.repository.query.AbstractDynamoDBQueryCreator.addCriteria(AbstractDynamoDBQueryCreator.java:103) ~[spring-data-dynamodb-5.1.0.jar:5.1.0]
at org.socialsignin.spring.data.dynamodb.repository.query.AbstractDynamoDBQueryCreator.create(AbstractDynamoDBQueryCreator.java:74) ~[spring-data-dynamodb-5.1.0.jar:5.1.0]
at org.socialsignin.spring.data.dynamodb.repository.query.AbstractDynamoDBQueryCreator.create(AbstractDynamoDBQueryCreator.java:42) ~[spring-data-dynamodb-5.1.0.jar:5.1.0]
at org.springframework.data.repository.query.parser.AbstractQueryCreator.createCriteria(AbstractQueryCreator.java:119) ~[spring-data-commons-2.6.3.jar:2.6.3]
at org.springframework.data.repository.query.parser.AbstractQueryCreator.createQuery(AbstractQueryCreator.java:95) ~[spring-data-commons-2.6.3.jar:2.6.3]
at org.springframework.data.repository.query.parser.AbstractQueryCreator.createQuery(AbstractQueryCreator.java:81) ~[spring-data-commons-2.6.3.jar:2.6.3]
at org.socialsignin.spring.data.dynamodb.repository.query.PartTreeDynamoDBQuery.doCreateQuery(PartTreeDynamoDBQuery.java:56) ~[spring-data-dynamodb-5.1.0.jar:5.1.0]
at org.socialsignin.spring.data.dynamodb.repository.query.AbstractDynamoDBQuery.doCreateQueryWithPermissions(AbstractDynamoDBQuery.java:81) ~[spring-data-dynamodb-5.1.0.jar:5.1.0]
at org.socialsignin.spring.data.dynamodb.repository.query.AbstractDynamoDBQuery$CollectionExecution.execute(AbstractDynamoDBQuery.java:100) ~[spring-data-dynamodb-5.1.0.jar:5.1.0]
at org.socialsignin.spring.data.dynamodb.repository.query.AbstractDynamoDBQuery.execute(AbstractDynamoDBQuery.java:311) ~[spring-data-dynamodb-5.1.0.jar:5.1.0]
at org.springframework.data.repository.core.support.RepositoryMethodInvoker.doInvoke(RepositoryMethodInvoker.java:137) ~[spring-data-commons-2.6.3.jar:2.6.3]
at org.springframework.data.repository.core.support.RepositoryMethodInvoker.invoke(RepositoryMethodInvoker.java:121) ~[spring-data-commons-2.6.3.jar:2.6.3]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:159) ~[spring-data-commons-2.6.3.jar:2.6.3]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:138) ~[spring-data-commons-2.6.3.jar:2.6.3]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.18.jar:5.3.18]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) ~[spring-aop-5.3.18.jar:5.3.18]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.18.jar:5.3.18]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.18.jar:5.3.18]
at com.sun.proxy.$Proxy69.findByMembersContaining(Unknown Source) ~[na:na]
at com.example.dynamodbtest.controller.GroupController.getTestGroups(GroupController.java:24) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_191]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_191]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_191]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_191]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.18.jar:5.3.18]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.18.jar:5.3.18]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.18.jar:5.3.18]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.18.jar:5.3.18]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.18.jar:5.3.18]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.18.jar:5.3.18]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.18.jar:5.3.18]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.18.jar:5.3.18]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.18.jar:5.3.18]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.18.jar:5.3.18]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.60.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.18.jar:5.3.18]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.60.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.60.jar:9.0.60]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.60.jar:9.0.60]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.18.jar:5.3.18]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.18.jar:5.3.18]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.60.jar:9.0.60]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.18.jar:5.3.18]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.18.jar:5.3.18]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.60.jar:9.0.60]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.18.jar:5.3.18]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.18.jar:5.3.18]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.60.jar:9.0.60]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.60.jar:9.0.60]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_191]
AWS DynamoDB Object
Group Object Showing String Set

Swapping to Enhanced Client, I was able to perform a 'Scan' with a 'Filter Expression' to return the results I want.
private DynamoDbClient getClient() {
Region region = Region.US_EAST_2;
return DynamoDbClient.builder()
.region(region)
.build();
}
private DynamoDbEnhancedClient getEnhancedClient() {
return DynamoDbEnhancedClient.builder()
.dynamoDbClient(getClient())
.build();
}
public List<Group> scanGroupsByMember(String memberId) {
DynamoDbTable<Group> groupTable = getEnhancedClient().table("GroupTable", TableSchema.fromClass(Group.class));
AttributeValue attributeValue = AttributeValue.builder()
.s(memberId)
.build();
Map<String, AttributeValue> expressionValues = new HashMap<>();
expressionValues.put(":value", attributeValue);
Expression expression = Expression.builder()
.expression("contains(members, :value)")
.expressionValues(expressionValues)
.build();
ScanEnhancedRequest scanEnhancedRequest = ScanEnhancedRequest.builder()
.filterExpression(expression)
.build();
return groupTable.scan(scanEnhancedRequest).items().stream().collect(Collectors.toList());
}

"I am using AWS Java SDK DynamoDB version 1.12.192".
You should use AWS SDK for Java V2 and to map Java classes to a DynamoDB table by using the Enhanced Client. This is best practice as opposed to using the old V1 API. See this doc topic:
Using the DynamoDB Enhanced Client in the AWS SDK for Java 2.x
Assume we have a Work table with a key named id. The following illustration shows the table.
TO map to this table, you can create a class that uses the #DynamoDbBean annotation like this:
import software.amazon.awssdk.enhanced.dynamodb.mapper.annotations.DynamoDbSortKey;
import software.amazon.awssdk.enhanced.dynamodb.mapper.annotations.DynamoDbBean;
import software.amazon.awssdk.enhanced.dynamodb.mapper.annotations.DynamoDbPartitionKey;
#DynamoDbBean
public class Work {
private String id;
private String date;
private String description ;
private String guide;
private String username ;
private String status ;
private String archive ;
#DynamoDbPartitionKey
public String getId() {
return this.id;
}
public void setId(String id) {
this.id = id;
}
#DynamoDbSortKey
public String getName() {
return this.username;
}
public void setArchive(String archive) {
this.archive = archive;
}
public String getArchive() {
return this.archive;
}
public void setStatus(String status) {
this.status = status;
}
public String getStatus() {
return this.status;
}
public void setUsername(String username) {
this.username = username;
}
public String getUsername() {
return this.username;
}
public void setGuide(String guide) {
this.guide = guide;
}
public String getGuide() {
return this.guide;
}
public String getDate() {
return this.date;
}
public void setDate(String date) {
this.date = date;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
To use the Enhanced Client to perform CRUD operation, create a DynamoDbTable object.
// Create a DynamoDbEnhancedClient.
DynamoDbEnhancedClient enhancedClient = DynamoDbEnhancedClient.builder()
.dynamoDbClient(getClient())
.build();
// Create a DynamoDbTable object.
DynamoDbTable<Work> workTable = enhancedClient.table("Work", TableSchema.fromBean(Work.class));
Now you can perform CRUD operations. To place a record into the table, you can create a Work object and set the data. Then call the DynamoDbTable objects putItem method.
// Populate the table.
Work record = new Work();
record.setUsername(item.getName());
record.setId(myGuid);
record.setDescription(item.getDescription());
record.setDate(now()) ;
record.setStatus(item.getStatus());
record.setArchive("Open");
record.setGuide(item.getGuide());
// Put the customer data into a DynamoDB table.
workTable.putItem(record);
The Amazon DynamoDB API V2 (Including the Enhanced Client) can be used within a Spring BOOT app too. To learn How TO build a SAMPLE Spring Boot web App, see this AWS tutorial.

Having an issue with One To Many and Many To One spring jpa app. getting a class cannot be serialized error

I am having an issue with a bidirectional mapping. and when I try to post or get I get a error class site cant be serialized. if I take away the mappedby in the site then it works just fine and take always the site field in the inventory it will work is that the right way?
11:24:52.341 [main] INFO - in 3.977 seconds (JVM running for 4.471)
11:25:36.453 [http-nio-8080-exec-2] INFO com.cbcse.controller.SiteController - I Fell in here
11:25:36.533 [http-nio-8080-exec-2] WARN com.cbcse.service.SiteServiceImpl - Handling of [org.springframework.transaction.TransactionSystemException] resulted in Exception
org.springframework.transaction.TransactionSystemException: Could not commit JPA transaction; nested exception is javax.persistence.RollbackException: Error while committing the transaction
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:571)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:743)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:711)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:654)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:407)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:174)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)
at jdk.proxy2/jdk.proxy2.$Proxy107.save(Unknown Source)
at com.cbcse.service.SiteServiceImpl.add(SiteServiceImpl.java:71)
at com.cbcse.controller.SiteController.add(SiteController.java:53)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:681)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1722)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: javax.persistence.RollbackException: Error while committing the transaction
at org.hibernate.internal.ExceptionConverterImpl.convertCommitException(ExceptionConverterImpl.java:81)
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:104)
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:562)
... 66 common frames omitted
Caused by: java.lang.ClassCastException: class com.cbcse.entity.Site cannot be cast to class java.io.Serializable (com.cbcse.entity.Site is in unnamed module of loader 'app'; java.io.Serializable is in module java.base of loader 'bootstrap')
at org.hibernate.type.CollectionType.getKeyOfOwner(CollectionType.java:446)
at org.hibernate.engine.internal.Collections.processReachableCollection(Collections.java:166)
at org.hibernate.event.internal.FlushVisitor.processCollection(FlushVisitor.java:53)
at org.hibernate.event.internal.AbstractVisitor.processValue(AbstractVisitor.java:104)
at org.hibernate.event.internal.AbstractVisitor.processValue(AbstractVisitor.java:65)
at org.hibernate.event.internal.AbstractVisitor.processEntityPropertyValues(AbstractVisitor.java:59)
at org.hibernate.event.internal.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:183)
at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:107)
at org.hibernate.event.internal.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:229)
at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:93)
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39)
at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:107)
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1416)
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:507)
at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3299)
at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2434)
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:449)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:183)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:40)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:281)
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:101)
... 67 common frames omitted
#Entity
public class Site {
#Id
#GeneratedValue
Long id;
String name;
String date;
String suite;
String unit;
long siteId;
#OneToMany( mappedBy="sites", fetch = FetchType.LAZY ,cascade = {CascadeType.MERGE,CascadeType.REFRESH},orphanRemoval = true)
List<Inventory> inventory = new ArrayList<>();
// #OneToMany(fetch = FetchType.LAZY ,cascade = CascadeType.ALL,orphanRemoval = true)
// List<SiteFiles> siteFiles = new ArrayList<>();
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getSiteName() {
return name;
}
public void setSiteName(String name) {
this.name = name;
}
public String getSiteDate() {
return date;
}
public void setSiteDate(String date) {
this.date = date;
}
public String getSiteSuite() {
return suite;
}
public void setSiteSuite(String suite) {
this.suite = suite;
}
public String getSiteUnit() {
return unit;
}
public void setSiteUnit(String unit) {
this.unit = unit;
}
public Long getSiteId() {
return siteId;
}
public void setSiteId(Long siteId) {
this.siteId = siteId;
}
public List<Inventory> getInventory() {
return inventory;
}
public void setInventory(List<Inventory> inventory) {
this.inventory = inventory;
}
}
#Entity
public class Inventory {
#Id
#GeneratedValue
Long id;
Long parentId;
#ManyToOne(fetch = FetchType.LAZY ,cascade = {CascadeType.MERGE,CascadeType.REFRESH})
#JoinColumn(name = "parentId", referencedColumnName = "siteId",insertable= false, updatable= false)
private Site sites;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Site getSites() {
return sites;
}
public void setSites(Site sites) {
this.sites = sites;
}
}

Spring Data JPA : DataIntegrityViolationException

I have three entities Blog, Comments, ParentChildComment.
Comment is mapped using ManyToOne relationship to Blog.
ParentChildComment has two columns to store id value of parent_comment and child_comment (this is done to store the info regarding which comment is a reply to another one) and both these columns are mapped using OneToOne relationship to Comment table which I guess is the sourcee of problem.
PROBLEM
When deleting a blog, comments are deleted due to cascade delete, but the parent_child table is still referncing to table comments which throw error org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [fkf3i44d11sgikshmo17q4fq1a4]; nested exception is org.hibernate.exception.ConstraintViolationException
The whole trace :
SQL Error: 0, SQLState: 23503
2021-05-19 22:31:07.123 ERROR 16445 --- [nio-8080-exec-6] o.h.engine.jdbc.spi.SqlExceptionHelper : ERROR: update or delete on table "comments" violates foreign key constraint "fkf3i44d11sgikshmo17q4fq1a4" on table "parent_child_comment"
Detail: Key (id)=(4) is still referenced from table "parent_child_comment".
2021-05-19 22:31:07.124 INFO 16445 --- [nio-8080-exec-6] o.h.e.j.b.internal.AbstractBatchImpl : HHH000010: On release of batch it still contained JDBC statements
2021-05-19 22:31:07.133 ERROR 16445 --- [nio-8080-exec-6] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [fkf3i44d11sgikshmo17q4fq1a4]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement] with root cause
org.postgresql.util.PSQLException: ERROR: update or delete on table "comments" violates foreign key constraint "fkf3i44d11sgikshmo17q4fq1a4" on table "parent_child_comment"
Detail: Key (id)=(4) is still referenced from table "parent_child_comment".
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2553) ~[postgresql-42.2.19.jar:42.2.19]
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2285) ~[postgresql-42.2.19.jar:42.2.19]
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:323) ~[postgresql-42.2.19.jar:42.2.19]
at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:481) ~[postgresql-42.2.19.jar:42.2.19]
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:401) ~[postgresql-42.2.19.jar:42.2.19]
at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:164) ~[postgresql-42.2.19.jar:42.2.19]
at org.postgresql.jdbc.PgPreparedStatement.executeUpdate(PgPreparedStatement.java:130) ~[postgresql-42.2.19.jar:42.2.19]
at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeUpdate(ProxyPreparedStatement.java:61) ~[HikariCP-3.4.5.jar:na]
at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeUpdate(HikariProxyPreparedStatement.java) ~[HikariCP-3.4.5.jar:na]
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:197) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:46) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:3614) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:3874) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.action.internal.EntityDeleteAction.execute(EntityDeleteAction.java:123) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:604) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.engine.spi.ActionQueue.lambda$executeActions$1(ActionQueue.java:478) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:684) ~[na:na]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:475) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:345) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:40) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:93) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1362) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:453) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3212) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2380) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:447) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:183) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:40) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:281) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:101) ~[hibernate-core-5.4.30.Final.jar:5.4.30.Final]
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:562) ~[spring-orm-5.3.6.jar:5.3.6]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:743) ~[spring-tx-5.3.6.jar:5.3.6]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:711) ~[spring-tx-5.3.6.jar:5.3.6]
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:654) ~[spring-tx-5.3.6.jar:5.3.6]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:407) ~[spring-tx-5.3.6.jar:5.3.6]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-5.3.6.jar:5.3.6]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.6.jar:5.3.6]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137) ~[spring-tx-5.3.6.jar:5.3.6]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.6.jar:5.3.6]
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:174) ~[spring-data-jpa-2.4.8.jar:2.4.8]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.6.jar:5.3.6]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) ~[spring-aop-5.3.6.jar:5.3.6]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.6.jar:5.3.6]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.6.jar:5.3.6]
at com.sun.proxy.$Proxy116.deleteById(Unknown Source) ~[na:na]
at com.rv02.evolvFit.Controller.deleteBlog(Controller.java:47) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.6.jar:5.3.6]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.6.jar:5.3.6]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.6.jar:5.3.6]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.6.jar:5.3.6]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.6.jar:5.3.6]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.6.jar:5.3.6]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1060) ~[spring-webmvc-5.3.6.jar:5.3.6]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:962) ~[spring-webmvc-5.3.6.jar:5.3.6]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.6.jar:5.3.6]
at org.springframework.web.servlet.FrameworkServlet.doDelete(FrameworkServlet.java:931) ~[spring-webmvc-5.3.6.jar:5.3.6]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:658) ~[tomcat-embed-core-9.0.45.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.6.jar:5.3.6]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.45.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.45.jar:9.0.45]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.6.jar:5.3.6]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.6.jar:5.3.6]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.6.jar:5.3.6]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.6.jar:5.3.6]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:93) ~[spring-boot-actuator-2.4.5.jar:2.4.5]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.6.jar:5.3.6]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.6.jar:5.3.6]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.6.jar:5.3.6]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.45.jar:9.0.45]
at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]
Relevant code blocks :
Blog.java
package com.rv02.evolvFit;
import com.fasterxml.jackson.annotation.JsonProperty;
import javax.persistence.*;
import javax.validation.constraints.NotBlank;
import java.util.ArrayList;
import java.util.List;
#Entity
#Table(name = "Blogs")
public class Blog {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#JsonProperty(access = JsonProperty.Access.READ_ONLY)
private int id;
#Column
#NotBlank(message = "title is required")
private String title;
#Column
#NotBlank(message = "Post text is required")
private String text;
#OneToMany(mappedBy = "blog", cascade =
{CascadeType.PERSIST, CascadeType.REMOVE},
orphanRemoval = true, fetch = FetchType.LAZY)
private List<Comment> comments;
public Blog() {
this.comments = new ArrayList<>();
}
public Blog(int id, String title, String text, List<Comment> comments) {
this.id = id;
this.title = title;
this.text = text;
this.comments = comments;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public List<Comment> getComments() {
return comments;
}
public void setComments(List<Comment> comments) {
this.comments = comments;
}
}
Comment.java
package com.rv02.evolvFit;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import javax.persistence.*;
import javax.validation.constraints.NotBlank;
#Entity
#Table(name = "Comments")
public class Comment {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#JsonProperty(access = JsonProperty.Access.READ_ONLY)
private int id;
#Column
#NotBlank(message = "comment cannot be blank")
private String text;
#JsonIgnore
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "blog_id")
private Blog blog;
public Comment(int id, String text, Blog blog) {
this.id = id;
this.text = text;
this.blog = blog;
}
public Comment() {
}
public Comment(String text, Blog blog) {
this.text = text;
this.blog = blog;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public Blog getBlog() {
return blog;
}
public void setBlog(Blog blog) {
this.blog = blog;
}
}
ParentChildComment.java
package com.rv02.evolvFit;
import com.fasterxml.jackson.annotation.JsonIgnore;
import javax.persistence.*;
#Entity
#Table(name = "Parent_Child_Comment")
public class ParentChildComment {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#JsonIgnore
private int id;
#OneToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "parent_comment_id", referencedColumnName = "id")
private Comment parentCommentID;
#OneToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "child_comment_id", referencedColumnName = "id")
private Comment childCommentID;
public ParentChildComment(Comment parentCommentID, Comment childCommentID) {
this.parentCommentID = parentCommentID;
this.childCommentID = childCommentID;
}
public Comment getParentCommentID() {
return parentCommentID;
}
public void setParentCommentID(Comment parentCommentID) {
this.parentCommentID = parentCommentID;
}
public Comment getChildCommentID() {
return childCommentID;
}
public void setChildCommentID(Comment childCommentID) {
this.childCommentID = childCommentID;
}
}
Delete Blog Function
#DeleteMapping(path = "/blogs/{id}")
public Blog deleteBlog(#PathVariable int id) {
Blog blog = blogRepository.findById(id)
.orElseThrow(DataNotFoundException::new);
blogRepository.deleteById(id);
return blog;
}
Code blocks added/modified to make it work
Adding a custom function to ParentChildComment repository
#Query(
value = "select * from PARENT_CHILD_COMMENT where PARENT_COMMENT_ID in (select id from COMMENTS where BLOG_ID = ?1)",
nativeQuery = true
)
List<ParentChildComment> findBlogCommentRelationships(int id);
Modified deleteBlog()
#DeleteMapping(path = "/blogs/{id}")
public Blog deleteBlog(#PathVariable int id) {
Blog blog = blogRepository.findById(id)
.orElseThrow(DataNotFoundException::new);
parentChildCommentRepository.deleteAll(
parentChildCommentRepository.findBlogCommentRelationships(id)
);
blogRepository.deleteById(id);
return blog;
}

before invoking blogRepository.deleteById you should delete also ParentChildComment whose comments are in the Blog's collection of comments.

Trying and failing to create a DTO in Spring-boot DTO that grabs data from 3 tables

I'm coding an API that connects an online db to an android app and have gotten stuck on how to create a DTO that takes data from 3 tables that are connected with each other.
It's the first API I'm coding and I'm still trying to learn good practices so any suggestions are welcome.
I've reached the point where I really don't know where else to look for an answer, since all the answers I find are explaining how to use a query to take data from a single table(might be searching for it using the wrong terminology since I'm not a native English speaker)
These are the entities I create in the API:
Employees
#Entity
#Table(name = "employees")
public class Employees {
#Id
#Column(name = "eid")
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int eid;
#Column(name = "first_name")
private String first_name;
#Column(name = "last_name")
private String last_name;
#Column(name = "birth_date")
#JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
private Date birth_date;
#Column(name = "jid")
private int jid;
//Getters setters constructors
}
Jobs
#Entity
#Table(name = "jobs")
public class Jobs {
#Id
#Column(name = "jid")
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int jid;
#Column(name = "job_name")
private String job_name;
//Getters setters constructors
}
Credentials
#Entity
#Table(name = "credentials")
#IdClass(CredentialsCID.class)
public class Credentials {
#Id
#Column(name = "username")
private String username;
#Id
#Column(name = "is_admin")
private byte is_admin;
#Column(name = "password")
private String password;
#Column(name = "eid")
private int eid;
//Getters setters constructors
}
And this is the dto class
EmployeesCustomDTO
package com.example.accessingdatamysql.dto;
import com.example.accessingdatamysql.model.Contracts;
import com.example.accessingdatamysql.model.Credentials;
import com.example.accessingdatamysql.model.Employees;
public class EmployeesCustomDTO {
private int eid;
private String first_name;
private String last_name;
private String jid;
private int hours;
private String type;
private byte is_admin;
public EmployeesCustomDTO() {
}
public EmployeesCustomDTO(int eid, String first_name, String last_name, String jid, int hours, String type, byte is_admin) {
this.eid = eid;
this.first_name = first_name;
this.last_name = last_name;
this.jid = jid;
this.hours = hours;
this.type = type;
this.is_admin = is_admin;
}
public int getEid() {
return eid;
}
public void setEid(int eid) {
this.eid = eid;
}
public String getFirst_name() {
return first_name;
}
public void setFirst_name(String first_name) {
this.first_name = first_name;
}
public String getLast_name() {
return last_name;
}
public void setLast_name(String last_name) {
this.last_name = last_name;
}
public String getJob_name() {
return jid;
}
public void setJob_name(String job_name) {
this.jid = job_name;
}
public int getHours() {
return hours;
}
public void setHours(int hours) {
this.hours = hours;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public byte getIs_admin() {
return is_admin;
}
public void setIs_admin(byte is_admin) {
this.is_admin = is_admin;
}
public EmployeesCustomDTO convertToDTO(Employees employees, Credentials credentials, Contracts contracts){
EmployeesCustomDTO employeesCustomDTO = new EmployeesCustomDTO();
employeesCustomDTO.setEid(employees.getEid());
employeesCustomDTO.setFirst_name(employees.getFirst_name());
employeesCustomDTO.setLast_name(employees.getLast_name());
employeesCustomDTO.setJob_name(String.valueOf(employees.getJid())); // TODO: 19/12/2020 check if correct
employeesCustomDTO.setType(contracts.getType());
employeesCustomDTO.setHours(contracts.getHours());
employeesCustomDTO.setIs_admin(credentials.getIs_admin());
return employeesCustomDTO;
}
}
Then I added the following query to the EmployeesRepo (which works as I want it to when I try it on MySQL workbench)
#Repository
public interface EmployeesRepo extends JpaRepository<Employees, Integer> {
#Query(value = "SELECT employees.eid,employees.first_name,employees.last_name,employees.jid,contracts.hours,contracts.type,credentials.is_admin " +
"FROM employees,credentials,contracts " +
"WHERE employees.eid = credentials.eid AND contracts.eid = employees.eid", nativeQuery = true)
List<EmployeesCustomDTO> getCustomErgazomenoi();
}
and the following method in its service
#Override
public List<EmployeesCustomDTO> getCustomErgazomenoi() {
return employeesRepo.getCustomErgazomenoi();
}
which I then call in the controller
#GetMapping("/custom-employees")
public List<EmployeesCustomDTO> getAllCustomEmployees(){return employeesService.getCustomErgazomenoi();}
When I send the request to the endpoint I get the following error:
From Postman:
{
"timestamp": "2020-12-22T16:40:28.542+00:00",
"status": 500,
"error": "Internal Server Error",
"message": "",
"path": "/employees/custom-employees"
}
From the terminal in intellij
2020-12-22 18:40:28.527 ERROR 2948 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.core.co
nvert.ConverterNotFoundException: No converter found capable of converting from type [org.springframework.data.jpa.repository.query.AbstractJpaQuery$TupleConverter$TupleBackedMap] to type [com.example.accessingdatamysql.dto.EmployeesCustomDTO]] with root cause
org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [org.springframework.data.jpa.repository.query.AbstractJpaQuery$TupleConverter$TupleBackedMap] to type [com.example.accessingdatamysql.dto.EmployeesCusto
mDTO]
at org.springframework.core.convert.support.GenericConversionService.handleConverterNotFound(GenericConversionService.java:322) ~[spring-core-5.3.1.jar:5.3.1]
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:195) ~[spring-core-5.3.1.jar:5.3.1]
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:175) ~[spring-core-5.3.1.jar:5.3.1]
at org.springframework.data.repository.query.ResultProcessor$ProjectingConverter.convert(ResultProcessor.java:309) ~[spring-data-commons-2.4.1.jar:2.4.1]
at org.springframework.data.repository.query.ResultProcessor$ChainingConverter.lambda$and$0(ResultProcessor.java:225) ~[spring-data-commons-2.4.1.jar:2.4.1]
at org.springframework.data.repository.query.ResultProcessor$ChainingConverter.convert(ResultProcessor.java:236) ~[spring-data-commons-2.4.1.jar:2.4.1]
at org.springframework.data.repository.query.ResultProcessor.processResult(ResultProcessor.java:156) ~[spring-data-commons-2.4.1.jar:2.4.1]
at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:158) ~[spring-data-jpa-2.4.1.jar:2.4.1]
at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:143) ~[spring-data-jpa-2.4.1.jar:2.4.1]
at org.springframework.data.repository.core.support.RepositoryMethodInvoker.doInvoke(RepositoryMethodInvoker.java:137) ~[spring-data-commons-2.4.1.jar:2.4.1]
at org.springframework.data.repository.core.support.RepositoryMethodInvoker.invoke(RepositoryMethodInvoker.java:121) ~[spring-data-commons-2.4.1.jar:2.4.1]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:152) ~[spring-data-commons-2.4.1.jar:2.4.1]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:131) ~[spring-data-commons-2.4.1.jar:2.4.1]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.1.jar:5.3.1]
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:80) ~[spring-data-commons-2.4.1.jar:2.4.1]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.1.jar:5.3.1]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:371) ~[spring-tx-5.3.1.jar:5.3.1]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:134) ~[spring-tx-5.3.1.jar:5.3.1]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.1.jar:5.3.1]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137) ~[spring-tx-5.3.1.jar:5.3.1]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.1.jar:5.3.1]
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:145) ~[spring-data-jpa-2.4.1.jar:2.4.1]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.1.jar:5.3.1]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) ~[spring-aop-5.3.1.jar:5.3.1]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.1.jar:5.3.1]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.1.jar:5.3.1]
at com.sun.proxy.$Proxy120.getCustomErgazomenoi(Unknown Source) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.3.1.jar:5.3.1]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208) ~[spring-aop-5.3.1.jar:5.3.1]
at com.sun.proxy.$Proxy77.getCustomErgazomenoi(Unknown Source) ~[na:na]
at com.example.accessingdatamysql.services.impl.EmployeesServiceImpl.getCustomErgazomenoi(EmployeesServiceImpl.java:45) ~[classes/:na]
at com.example.accessingdatamysql.controllers.EmployeesController.getAllCustomEmployees(EmployeesController.java:28) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197) ~[spring-web-5.3.1.jar:5.3.1]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141) ~[spring-web-5.3.1.jar:5.3.1]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.1.jar:5.3.1]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:893) ~[spring-webmvc-5.3.1.jar:5.3.1]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:807) ~[spring-webmvc-5.3.1.jar:5.3.1]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.1.jar:5.3.1]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1061) ~[spring-webmvc-5.3.1.jar:5.3.1]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:961) ~[spring-webmvc-5.3.1.jar:5.3.1]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.1.jar:5.3.1]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.1.jar:5.3.1]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.39.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.1.jar:5.3.1]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.39.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.39.jar:9.0.39]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.1.jar:5.3.1]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.1.jar:5.3.1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.1.jar:5.3.1]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.1.jar:5.3.1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.1.jar:5.3.1]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.1.jar:5.3.1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[na:na]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.39.jar:9.0.39]
at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na]
Even though I've found some answers on how to fix this problem I can't seem to get it to work on my API. Any suggestions?

Can you provide the code for EmployeesCustomDTO class? It looks like you are trying to perform a DTO projection which would require you to map the SQL result to the properties in the DTO.
If you are using hibernate you can create an appropriate constructor on the DTO and update query to use the new constructor:
#Query(value = "SELECT com.example.accessingdatamysql.dto.EmployeesCustomDTO(employees.eid,employees.first_name,employees.last_name,employees.jid,contracts.hours,contracts.type,credentials.is_admin) " +
"FROM employees,credentials,contracts " +
"WHERE employees.eid = credentials.eid AND contracts.eid = employees.eid")
List<EmployeesCustomDTO> getCustomErgazomenoi();
For a detailed explanation see - https://vladmihalcea.com/the-best-way-to-map-a-projection-query-to-a-dto-with-jpa-and-hibernate/
Either way, you must provide the mapping from the SQL result set to your DTOs properties. If you are following standard naming conventions in SQL and Java the names are likely not identical - e.g. your query references first_name but I assume your DTO will be firstName.
Looks like you can also provide the mapping via #SqlResultSetMapping if you are using native queries: https://thorben-janssen.com/dto-projections/#DTO_projections_for_native_SQL_queries
Similar Stackoverflow post:
Spring JPA native query with Projection gives "ConverterNotFoundException"

Convert ID to the class type using Spring Rest

I am trying to develop a generic crud using Spring Boot, my generic entity base class use serializable
#MappedSuperclass
public abstract class Entidade<T extends Serializable> implements Serializable {
private static final long serialVersionUID = 1L;
public abstract T getId();
public abstract T setId(T id);
}
#Entity
#Table(name = "cachorro")
#Getter
#Setter
#NoArgsConstructor
public class Cachorro extends Entidade<Long> {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "cachorro_seq")
private Long id;
#Column(length = 100, nullable = false)
private String nome;
#Override
public Long getId() {
return this.id;
}
#Override
public Long setId(Long id) {
return this.id;
}
}
So when I call rest method it throw a exception telling about the conversion, when use repository method.
#NoRepositoryBean
public interface AbstratoRepository<E extends Entidade<?>> extends JpaRepository<E, Serializable> {
}
#Repository
public interface CachorroRepository extends AbstratoRepository<Cachorro> {
}
Package Service
public interface IAbstratoService<E> {
public List<E> carregarTodos();
public Optional<E> carregarPeloCodigo(Serializable id);
public void inserir(E entidade);
public void atualizar(E entidade);
public void deletar(Serializable id);
}
public class AbstratoServiceImpl<T extends Serializable, E extends Entidade<?>, R extends AbstratoRepository<E>>
implements IAbstratoService<E> {
#Autowired
private R repositorio;
#Override
public List<E> carregarTodos() {
return this.repositorio.findAll();
}
#Override
public Optional<E> carregarPeloCodigo(Serializable id) {
return this.repositorio.findById(id);
}
#Override
public void inserir(E entidade) {
this.repositorio.save(entidade);
}
#Override
public void atualizar(E entidade) {
this.repositorio.save(entidade);
}
#Override
public void deletar(Serializable id) {
this.repositorio.deleteById(id);
}
}
#Service
public class CachorroService extends AbstratoServiceImpl<Long, Cachorro, CachorroRepository> {
}
And Resource
public abstract class AbstratoResource<E extends Entidade<?>, S extends IAbstratoService<E>> {
#Autowired
protected S service;
#GetMapping("/carregarTodos")
public List<E> carregarTodos() {
return this.service.carregarTodos();
}
#GetMapping("/carregarPeloCodigo/{id}")
public Optional<E> carregarPeloCodigo(#PathVariable("id") Serializable id) {
return this.service.carregarPeloCodigo(id);
}
#PostMapping("/inserir")
public void inserir(E entidade) {
this.service.inserir(entidade);
}
#PutMapping("/atualizar")
public void atualizar(E entidade) {
this.service.atualizar(entidade);
}
#DeleteMapping("/deletar")
public void deletar(Serializable id) {
this.service.deletar(id);
}
}
#RestController
#RequestMapping("/cachorro")
public class CachorroResource extends AbstratoResource<Cachorro, CachorroService> {
#GetMapping("/criar")
public void criar() {
List<String> nomes = Arrays.asList("Alé", "Diana", "Enzo", "França", "Nanico", "Nina", "Leco", "Princesa", "Petruquio", "Titinha");
for (String nome : nomes) {
Cachorro cachorro = new Cachorro();
cachorro.setNome(nome);
this.service.inserir(cachorro);
}
}
}
So I got this stack trace
org.hibernate.TypeMismatchException: Provided id of the wrong type for class br.com.abstrato.model.Cachorro. Expected: class java.lang.Long, got class java.lang.String
at org.hibernate.event.internal.DefaultLoadEventListener.checkIdClass(DefaultLoadEventListener.java:174) ~[hibernate-core-5.3.11.Final.jar:5.3.11.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:90) ~[hibernate-core-5.3.11.Final.jar:5.3.11.Final]
at org.hibernate.internal.SessionImpl.fireLoadNoChecks(SessionImpl.java:1288) ~[hibernate-core-5.3.11.Final.jar:5.3.11.Final]
at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1276) ~[hibernate-core-5.3.11.Final.jar:5.3.11.Final]
at org.hibernate.internal.SessionImpl.access$2000(SessionImpl.java:208) ~[hibernate-core-5.3.11.Final.jar:5.3.11.Final]
at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.doLoad(SessionImpl.java:2912) ~[hibernate-core-5.3.11.Final.jar:5.3.11.Final]
at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.load(SessionImpl.java:2886) ~[hibernate-core-5.3.11.Final.jar:5.3.11.Final]
at org.hibernate.internal.SessionImpl.find(SessionImpl.java:3521) ~[hibernate-core-5.3.11.Final.jar:5.3.11.Final]
at org.hibernate.internal.SessionImpl.find(SessionImpl.java:3490) ~[hibernate-core-5.3.11.Final.jar:5.3.11.Final]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_221]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_221]
at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:350) ~[spring-orm-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at com.sun.proxy.$Proxy86.find(Unknown Source) ~[na:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_221]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_221]
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:309) ~[spring-orm-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at com.sun.proxy.$Proxy86.find(Unknown Source) ~[na:na]
at org.springframework.data.jpa.repository.support.SimpleJpaRepository.findById(SimpleJpaRepository.java:274) ~[spring-data-jpa-2.1.10.RELEASE.jar:2.1.10.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_221]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_221]
at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:359) ~[spring-data-commons-2.1.10.RELEASE.jar:2.1.10.RELEASE]
at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:200) ~[spring-data-commons-2.1.10.RELEASE.jar:2.1.10.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:644) ~[spring-data-commons-2.1.10.RELEASE.jar:2.1.10.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:608) ~[spring-data-commons-2.1.10.RELEASE.jar:2.1.10.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$invoke$3(RepositoryFactorySupport.java:595) ~[spring-data-commons-2.1.10.RELEASE.jar:2.1.10.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:595) ~[spring-data-commons-2.1.10.RELEASE.jar:2.1.10.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:59) ~[spring-data-commons-2.1.10.RELEASE.jar:2.1.10.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:295) ~[spring-tx-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98) ~[spring-tx-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:144) ~[spring-data-jpa-2.1.10.RELEASE.jar:2.1.10.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$ExposeRepositoryInvocationInterceptor.invoke(CrudMethodMetadataPostProcessor.java:364) ~[spring-data-jpa-2.1.10.RELEASE.jar:2.1.10.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) ~[spring-aop-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61) ~[spring-data-commons-2.1.10.RELEASE.jar:2.1.10.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at com.sun.proxy.$Proxy88.findById(Unknown Source) ~[na:na]
at br.com.abstrato.service.AbstratoServiceImpl.carregarPeloCodigo(AbstratoServiceImpl.java:25) ~[classes/:na]
at br.com.abstrato.resource.AbstratoResource.carregarPeloCodigo(AbstratoResource.java:29) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_221]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_221]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.24.jar:9.0.24]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526) [tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860) [tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) [tomcat-embed-core-9.0.24.jar:9.0.24]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.24.jar:9.0.24]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_221]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_221]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.24.jar:9.0.24]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_221]
So I understand the stack trace, the id comes in String and I need to convert to Long, but how can I do this using generic way, I tryed to use reflection, but didn´t work.
Can someone help me.

I am pretty sure that the error here is the following => AbstratoServiceImpl and AbstratoResource should use T and not serializable for id fields. The following is a good starting point.
public abstract class AbstratoResource<ID, E extends Entidade<ID>, S extends IAbstratoService<E>> {
#Autowired
protected S service;
#GetMapping("/carregarTodos")
public List<E> carregarTodos() {
return this.service.carregarTodos();
}
#GetMapping("/carregarPeloCodigo/{id}")
public Optional<E> carregarPeloCodigo(#PathVariable("id") ID id) {
return this.service.carregarPeloCodigo(id);
}
#PostMapping("/inserir")
public void inserir(E entidade) {
this.service.inserir(entidade);
}
#PutMapping("/atualizar")
public void atualizar(E entidade) {
this.service.atualizar(entidade);
}
#DeleteMapping("/deletar")
public void deletar(ID id) {
this.service.deletar(id);
}
}
public interface IAbstratoService<E> {
public List<E> carregarTodos();
public Optional<E> carregarPeloCodigo(ID id);
public void inserir(E entidade);
public void atualizar(E entidade);
public void deletar(ID id);
}
public class AbstratoServiceImpl<ID, T extends Serializable, E extends Entidade<ID>, R extends AbstratoRepository<E>>
implements IAbstratoService<E> {
#Autowired
private R repositorio;
#Override
public List<E> carregarTodos() {
return this.repositorio.findAll();
}
#Override
public Optional<E> carregarPeloCodigo(ID id) {
return this.repositorio.findById(id);
}
#Override
public void inserir(E entidade) {
this.repositorio.save(entidade);
}
#Override
public void atualizar(E entidade) {
this.repositorio.save(entidade);
}
#Override
public void deletar(ID id) {
this.repositorio.deleteById(id);
}
}
#Service
public class CachorroService extends AbstratoServiceImpl<Long, Cachorro, CachorroRepository> {
}