how to access the deployed war in wildly v 10?

how to access the deployed war in wildly v 10? - java

I have my service as;
#Path("/fileservice/")
public class FileService {
#POST
#Path("/{path}/{filename}/{source}/{client}")
public Response getFilePath(
#PathParam("path") String filePath,
#PathParam("filename") String fileName,
#PathParam("source") String fileSource,
#PathParam("client") String clientId) {
.......
}
and have an jars activator;
#ApplicationPath("rest")
public class JaxRsActivator extends Application{
}
I do not have web.xml.
When i try to access this war from the browser;
i use;
http://localhost:8080/mywar/rest/fileservice
But I'm getting;
6:09:28,215 ERROR [org.jboss.resteasy.resteasy_jaxrs.i18n] (default task-15) RESTEASY002010: Failed to execute: javax.ws.rs.NotFoundException: RESTEASY003210: Could not find resource for full path: http://localhost:8080/mywar/rest/fileservice
at org.jboss.resteasy.core.registry.SegmentNode.match(SegmentNode.java:114)
at org.jboss.resteasy.core.registry.RootNode.match(RootNode.java:43)
at org.jboss.resteasy.core.registry.RootClassNode.match(RootClassNode.java:48)
at
org.jboss.resteasy.core.ResourceMethodRegistry.getResourceInvoker(ResourceMethodRegistry.java:445)
at org.jboss.resteasy.core.SynchronousDispatcher.getInvoker(SynchronousDispatcher.java:257)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:194)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:221)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Can anybody help me what I'm doing wrong?

You can't access that resource from a web browser because you have it set as a POST method. You'd need to use a tool that can send POST requests and provide the /{path}/{filename}/{source}/{client} parameters you have defined.

According to the JAX-RS documentation the #PathParam should be used for GET requests.
For POST requests, one should either consume JSON or JAXB, for full entity beans, or make use of the #FormParam when the intention is to retrieve information that conforms to the encoding specified by HTML forms. This answer, by #D.Shawley, may elucidate you more on this subject.
Taking the code you've posted as basis, the following is a simple working example:
The Base URI for all REST services
#ApplicationPath("/rest")
public class JaxRsActivator extends Application {}
The REST Service
#Path("/fileservice")
public class FileService {
#GET
#Path("/{id}")
#Produces("text/html")
public Response getFileId(#PathParam("id") String fileId) {
System.out.println(fileId);
return Response.ok().entity(fileId).build();
}
#POST
#Path("/file")
#Consumes(MediaType.APPLICATION_XML)
public Response createFile(MyFile myFile) {
System.out.println(myFile.id);
return Response.ok().build();
}
}
The entity
#XmlRootElement(name="file")
public class MyFile {
#XmlElement
public String id;
#XmlElement
public String name;
public MyFile() {}
}
Your WAR pom.xml file should look like this:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>war-group</groupId>
<artifactId>war-artifact</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
Then, in order to test your REST service, you could create a simple client that could look like this:
public class FileServiceClient {
public static void main(String[] args) throws Exception {
callRestServiceGET();
callRestServicePOST();
}
protected static void callRestServiceGET() {
URI uri = null;
try {
uri = new URI("http://localhost:8080/war-artifact-0.0.1-SNAPSHOT/rest/fileservice/98765");
} catch (URISyntaxException e) {
e.printStackTrace();
}
Client client = ClientBuilder.newClient();
Response response = client.target(uri).request().get();
System.out.println("GET sended, response status: " + response.getStatus());
}
protected static void callRestServicePOST() {
URI uri = null;
try {
uri = new URI("http://localhost:8080/war-artifact-0.0.1-SNAPSHOT/rest/fileservice/file");
} catch (URISyntaxException e) {
e.printStackTrace();
}
Client client = ClientBuilder.newClient();
String xml = "<file><id>1234567</id><name>abc</name></file>";
Response response = client.target(uri).request().post(Entity.xml(xml));
System.out.println("POST sended, response status: " + response.getStatus());
}
}

Related

How to throw custom exception in proper way when using #javax.validation.Valid?

How to throw a custom exception in the proper way when using #javax.validation.Valid?
I'm using #Valid in controller, and #AssertTrue to validate request body fields.
public ResponseEntity<Foo> createFoo(
#Valid #RequestBody Foo FooRequest ...
#AssertTrue()
public boolean isFooValid() {
if (invalid)
return false;
...
}
However, I want to throw customized Exception class in some condition.
#AssertTrue()
public boolean isFooValid() {
if (invalid)
return false;
...
// note below
if (invalidInAnotherCondition)
throw new CustomizedException(...);
}
I know this is not desirable way to utilize #Valid in controller, and #AssertTrue. Nevertheless, as I can make my own Exception class which contains customized error info, with the convenience of #Valid.
However the error happens.
javax.validation.ValidationException: HV000090: Unable to access isFooValid
at org.hibernate.validator.internal.util.ReflectionHelper.getValue(ReflectionHelper.java:245)
at org.hibernate.validator.internal.metadata.location.GetterConstraintLocation.getValue(GetterConstraintLocation.java:89)
at org.hibernate.validator.internal.engine.ValueContext.getValue(ValueContext.java:235)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:549)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForSingleDefaultGroupElement(ValidatorImpl.java:515)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:485)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:447)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:397)
at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:173)
at org.springframework.validation.beanvalidation.SpringValidatorAdapter.validate(SpringValidatorAdapter.java:117)
at org.springframework.boot.autoconfigure.validation.ValidatorAdapter.validate(ValidatorAdapter.java:70)
at org.springframework.validation.DataBinder.validate(DataBinder.java:889)
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.validateIfApplicable(AbstractMessageConverterMethodArgumentResolver.java:266)
at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:137)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:167)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
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:523)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:590)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269)
at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:376)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.reflect.InvocationTargetException: null
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.hibernate.validator.internal.util.ReflectionHelper.getValue(ReflectionHelper.java:242)
... 70 common frames omitted
Caused by: com.finda.services.finda.common.exception.CustomizedException: 'df282e0d-1205-4574-adaa-0af819af66c0'
at ...
... 75 common frames omitted
I think this happens because originally, #AssertTrue throws its own Exception itself and it is to be processed through the internal logic; However, customized thrown Exception is not acceptable which can be seen in Caused by: java.lang.reflect.InvocationTargetException: null and javax.validation.ValidationException: HV000090: Unable to access isFooValid
So my final question is below,
Can I bypass this error, still throwing customized Exception?
I really appreciate that you read this long posting in advance.

Consider the example below where I implemented something like what you asking for:
#RestController
#RequestMapping("/accounts")
public class SavingsAccountController {
private final BankAccountService accountService;
#Autowired
public SavingsAccountController(SavingsAccountService accountService) {
this.accountService = accountService;
}
#PutMapping("withdraw")
public ResponseEntity<AccountBalance> onMoneyWithdrawal(#RequestBody #Validated WithdrawMoney withdrawal, BindingResult errors) {
//this is the validation barrier
if (errors.hasErrors()) {
throw new ValidationException(errors);
}
double balance = accountService.withdrawMoney(withdrawal);
return ResponseEntity.ok(new AccountBalance(
withdrawal.getAccountNumber(), balance));
}
#PutMapping("save")
public ResponseEntity<AccountBalance> onMoneySaving(#RequestBody #Validated SaveMoney savings, BindingResult errors) {
//this is the validation barrier
if (errors.hasErrors()) {
throw new ValidationException(errors);
}
double balance = accountService.saveMoney(savings);
return ResponseEntity.ok(new AccountBalance(
savings.getAccountNumber(), balance));
}
}
In the code above, we're using Bean Validation to check that the user's DTO contains valid information. Any errors found in the DTO are provided through the BindingResult errors variable, from where the developer can extract all the details of what went wrong during the validation phase.
To make it easier for the developers to deal with this pattern, in the code above, I simply wrap the BindingResult into a custom ValidationException which knows how to extract the validation error details.
public class ValidationException extends RuntimeException {
private final BindingResult errors;
public ValidationException(BindingResult errors) {
this.errors = errors;
}
public List<String> getMessages() {
return getValidationMessage(this.errors);
}
#Override
public String getMessage() {
return this.getMessages().toString();
}
//demonstrate how to extract a message from the binging result
private static List<String> getValidationMessage(BindingResult bindingResult) {
return bindingResult.getAllErrors()
.stream()
.map(ValidationException::getValidationMessage)
.collect(Collectors.toList());
}
private static String getValidationMessage(ObjectError error) {
if (error instanceof FieldError) {
FieldError fieldError = (FieldError) error;
String className = fieldError.getObjectName();
String property = fieldError.getField();
Object invalidValue = fieldError.getRejectedValue();
String message = fieldError.getDefaultMessage();
return String.format("%s.%s %s, but it was %s", className, property, message, invalidValue);
}
return String.format("%s: %s", error.getObjectName(), error.getDefaultMessage());
}
}
Notice that in my controller definition I do not use Bean Validation's #Valid annotation, but the Spring counterpart #Validated, but under the hood Spring will use Bean Validation.
How to Serialize the Custom Exception?
In the code above the ValidationException will be thrown when the payload is invalid. How should the controller create a response for the client out of this?
There are multiple ways to deal with this, but perhaps the simplest solution is to define a class annotated as #ControllerAdvice. In this annotated class we will place our exception handlers for any specific exception that we want to handle and turn them into a valid response object to travel back to our clients:
#ControllerAdvice
public class ExceptionHandlers {
#ExceptionHandler
public ResponseEntity<ErrorModel> handle(ValidationException ex) {
return ResponseEntity.badRequest()
.body(new ErrorModel(ex.getMessages()));
}
//...
}
I wrote a few other examples of this and other validation techniques with Spring in case you may be interested in reading more about it.

Here is a solution I used (that might not answer this question directly but possibly help others who get to this page that came with similar intentions as I had):
My aim was foremost to respond with a custom error message to the client who sent a request with an invalid object.
In my controller I use a standard #Valid annotation from javax.validation.Valid before the parameter
In my entity class I use the standard validation constraint, e.g. #NotNull(message = "Field XYZ has to be provided") from javax.validation.constraints.NotNull
I catch the ValidationException in my ControllerAdvice class:
#ControllerAdvice
public class MyControllerAdvice extends ResponseEntityExceptionHandler {
#Override
protected ResponseEntity<Object> handleMethodArgumentNotValid(
MethodArgumentNotValidException exception,
HttpHeaders headers,
HttpStatus status,
WebRequest request) {
return new ResponseEntity<>(
new JSONObject().put("message", extractValidationMessage(exception)).toString(),
HttpStatus.BAD_REQUEST);
}
private String extractValidationMessage(MethodArgumentNotValidException exception) {
String exceptionMessage = exception.getMessage();
String[] messageParts = exceptionMessage.split(";");
String finalPart = messageParts[messageParts.length -1];
return finalPart.trim().replaceAll("default message \\[|]]","");
}
}
This will return a 400 Error code and a body of this style:
{"message":"Field XYZ has to be provided"}

Keycloak Authenticator SPI example not working

I followed the walkthrough for setting up a custom authenticator spi for keycloak (version 4.8.3). I pretty much only use the example code i got from here. I only changed the pom so i could compile the project and deploy it with mvn clean install wildfly:deploy. And it works ... I can configure the new authentication flow in keycloak, update the Browser Flow and set the required actions. But if i want to use the new Authentication with my application i get the following message: Invalid username or password. And in the console i get the following output:
17:12:20,721 WARN [org.keycloak.events] (default task-1) type=REFRESH_TOKEN_ERROR, realmId=master, clientId=security-admin-console, userId=null, ipAddress=127.0.0.1, error=invalid_token, grant_type=refresh_token, client_auth_method=client-secret
17:13:50,514 WARN [org.keycloak.services] (default task-4) KC-SERVICES0013: Failed authentication: org.keycloak.authentication.AuthenticationFlowException: authenticator: secret-question-authenticator
at org.keycloak.authentication.DefaultAuthenticationFlow.processFlow(DefaultAuthenticationFlow.java:194)
at org.keycloak.authentication.AuthenticationProcessor.authenticateOnly(AuthenticationProcessor.java:910)
at org.keycloak.authentication.AuthenticationProcessor.authenticate(AuthenticationProcessor.java:779)
at org.keycloak.protocol.AuthorizationEndpointBase.handleBrowserAuthenticationRequest(AuthorizationEndpointBase.java:139)
at org.keycloak.protocol.oidc.endpoints.AuthorizationEndpoint.buildAuthorizationCodeAuthorizationResponse(AuthorizationEndpoint.java:419)
at org.keycloak.protocol.oidc.endpoints.AuthorizationEndpoint.process(AuthorizationEndpoint.java:152)
at org.keycloak.protocol.oidc.endpoints.AuthorizationEndpoint.buildGet(AuthorizationEndpoint.java:108)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140)
at org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:509)
at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:399)
at org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$0(ResourceMethodInvoker.java:363)
at org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:358)
at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:365)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:337)
at org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:137)
at org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:106)
at org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:132)
at org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:100)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:443)
at org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:233)
at org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:139)
at org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:358)
at org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:142)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:219)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:227)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:791)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
at org.keycloak.services.filters.KeycloakSessionServletFilter.doFilter(KeycloakSessionServletFilter.java:90)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:360)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378)
at java.lang.Thread.run(Thread.java:748)
17:13:50,523 WARN [org.keycloak.events] (default task-4) type=LOGIN_ERROR, realmId=Test, clientId=test, userId=null, ipAddress=192.168.1.123, error=invalid_user_credentials, auth_method=openid-connect, auth_type=code, response_type=code, redirect_uri=http://localhost:8080/sso/login, code_id=102f9drs-15d2-4e68-b123-38c092640da7, response_mode=query
I looked up the file DefaultAuthenticationFlow.java:194 on github and it seems to be a RuntimeException:
throw new RuntimeException("Unable to find factory for AuthenticatorFactory: " + model.getAuthenticator() + " did you forget to declare it in a META-INF/services file?");
I dont really know what to do about that. I have the META-INF/services from the example project included.
any idea what the problem might be here?
Update:
Here my auth. flow settings:
Bindings » Browser Flow: is set to test
Update:
I used something like this for my own authenticator.
public class TestAuthenticator extends UsernamePasswordForm {
#Override
public void action(AuthenticationFlowContext context) {
MultivaluedMap<String, String> formData = context.getHttpRequest().getDecodedFormParameters();
if (formData.containsKey("cancel")) {
context.cancelLogin();
return;
}
if (!validateTestForm(context, formData))
return;
context.success();
}
private boolean validateTestForm(AuthenticationFlowContext context, MultivaluedMap<String, String> formData) {
String username = formData.getFirst(AuthenticationManager.FORM_USERNAME);
String password = formData.getFirst(CredentialRepresentation.PASSWORD);
// remove leading and trailing whitespace
username = username.trim();
context.getEvent().detail(Details.USERNAME, username);
context.getAuthenticationSession().setAuthNote(AbstractUsernameFormAuthenticator.ATTEMPTED_USERNAME, username);
if (username == null) {
context.getEvent().error(Errors.USERNAME_MISSING);
Response challengeResponse = challenge(context, Messages.INVALID_USER);
context.failureChallenge(AuthenticationFlowError.INVALID_USER, challengeResponse);
return false;
}
UserModel user;
try {
// Check if this user exists
user = KeycloakModelUtils.findUserByNameOrEmail(context.getSession(), context.getRealm(), username);
if (user != null) {
// do your own thing here ...
validateUserAndPassword(context, formData);
}
} catch (ModelDuplicateException mde) {
ServicesLogger.LOGGER.modelDuplicateException(mde);
// Could happen during federation import
if (mde.getDuplicateFieldName() != null && mde.getDuplicateFieldName().equals(UserModel.EMAIL)) {
setDuplicateUserChallenge(context, Errors.EMAIL_IN_USE, Messages.EMAIL_EXISTS,
AuthenticationFlowError.INVALID_USER);
} else {
setDuplicateUserChallenge(context, Errors.USERNAME_IN_USE, Messages.USERNAME_EXISTS,
AuthenticationFlowError.INVALID_USER);
}
return false;
}
if (user == null) {
testInvalidUser(context, user);
return false;
}
if (!enabledUser(context, user))
return false;
context.setUser(user);
return true;
}
}
public class TestAuthenticatorFactory implements AuthenticatorFactory, ConfigurableAuthenticatorFactory {
public static final String PROVIDER_ID = "test-authenticator";
private static final TestAuthenticator SINGLETON = new TestAuthenticator();
#Override
public String getId() {
return PROVIDER_ID;
}
#Override
public Authenticator create(KeycloakSession session) {
return SINGLETON;
}
private static AuthenticationExecutionModel.Requirement[] REQUIREMENT_CHOICES = {
AuthenticationExecutionModel.Requirement.REQUIRED, AuthenticationExecutionModel.Requirement.DISABLED };
#Override
public AuthenticationExecutionModel.Requirement[] getRequirementChoices() {
return REQUIREMENT_CHOICES;
}
#Override
public boolean isUserSetupAllowed() {
return true;
}
#Override
public boolean isConfigurable() {
return true;
}
#Override
public List<ProviderConfigProperty> getConfigProperties() {
return Collections.emptyList();
}
#Override
public String getHelpText() {
return "Help";
}
#Override
public String getDisplayType() {
return "Test Authenticator";
}
#Override
public String getReferenceCategory() {
return PasswordCredentialModel.TYPE;
}
#Override
public void init(Config.Scope config) {
}
#Override
public void postInit(KeycloakSessionFactory factory) {
}
#Override
public void close() {
}
}

For who wants an example:
https://github.com/mfandre/KeycloakSPI/
This example creates an SPI to user storage... The idea is similar to authenticate the user in LDAP but in this example, we will authenticate in a RestAPI and bring the user to the keycloak!

Error receiving while generating excel using servlet

I have created a piece of code for generating and downloading an excel file in servlet. The code is provided below:
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String act = request.getParameter("act").toLowerCase();
RequestDispatcher rd = request.getRequestDispatcher("sqleditor.jsp");
try {
if(act.equalsIgnoreCase("exec")) {
String uqry = request.getParameter("isql");
if ( !uqry.isEmpty() ) {
qp = new queryProcessor(uqry);
mp = qp.getResultSet();
request.setAttribute("result",mp);
rd.forward(request, response);
} else {
ERROR_MSG = "Please enter a query";
request.setAttribute("errormsg", ERROR_MSG);
rd.forward(request, response);
}
} else if (act.equalsIgnoreCase("excel")) {
String uqry = request.getParameter("isql");
if ( !uqry.isEmpty() ) {
try {
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment; filename=\"" + FILENAME + "\"");
initExcelfile(response.getOutputStream());
} catch (Exception evar1) {
request.setAttribute("errormsg", evar1.getMessage());
rd.forward(request, response);
}
System.out.println("File downloaded at client successfully");
}
}
} catch (AppException evar2) {
request.setAttribute("errormsg", evar2.getmessage());
rd.forward(request, response);
} catch (SQLException evar3) {
request.setAttribute("errormsg", evar3.getMessage());
rd.forward(request, response);
} catch (NullPointerException evar4) {
request.setAttribute("errormsg", evar4.getMessage());
rd.forward(request, response);
} catch (FileNotFoundException evar5) {
request.setAttribute("errormsg", evar5.getMessage());
rd.forward(request, response);
} catch (Exception evar6) {
request.setAttribute("errormsg", evar6.getMessage());
rd.forward(request, response);
}
}
private void initExcelfile(ServletOutputStream outputStream) {
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet("Datatypes");
Object[][] datatypes = {
{"Datatype", "Type", "Size(in bytes)"},
{"int", "Primitive", 2},
{"float", "Primitive", 4},
{"double", "Primitive", 8},
{"char", "Primitive", 1},
{"String", "Non-Primitive", "No fixed size"}
};
int rowNum = 0;
System.out.println("Creating excel");
for (Object[] datatype : datatypes) {
Row row = sheet.createRow(rowNum++);
int colNum = 0;
for (Object field : datatype) {
Cell cell = row.createCell(colNum++);
if (field instanceof String) {
cell.setCellValue((String) field);
} else if (field instanceof Integer) {
cell.setCellValue((Integer) field);
}
}
}
System.out.println("Workbook Created");
try {
workbook.write(outputStream);
} catch (IOException e) {
e.printStackTrace();
}
}
But when I move the initExcelfile() method to a separate class file and invoke the method from there I receive the below error:
ERROR [io.undertow.request] (default task-4) UT005023: Exception handling request to /sqle/sqleditor.jsp: java.lang.RuntimeException: java.lang.IllegalStateException: UT010006: Cannot call getWriter(), getOutputStream() already called
at io.undertow.servlet.spec.RequestDispatcherImpl.forwardImpl(RequestDispatcherImpl.java:245)
at io.undertow.servlet.spec.RequestDispatcherImpl.forwardImplSetup(RequestDispatcherImpl.java:147)
at io.undertow.servlet.spec.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:111)
at com.sqle.RequestController.doPost(RequestController.java:84)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:805)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalStateException: UT010006: Cannot call getWriter(), getOutputStream() already called
at io.undertow.servlet.spec.HttpServletResponseImpl.getWriter(HttpServletResponseImpl.java:355)
at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:112)
at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:105)
at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:183)
at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:121)
at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:75)
at org.apache.jsp.sqleditor_jsp._jspService(sqleditor_jsp.java:196)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:433)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:402)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:346)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.jsp.JspFileHandler.handleRequest(JspFileHandler.java:32)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:274)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchToPath(ServletInitialHandler.java:209)
at io.undertow.servlet.spec.RequestDispatcherImpl.forwardImpl(RequestDispatcherImpl.java:221)
... 42 more
Could you please let me know what I am missing here due to which I am encountering this error.

Based on the stacktrace, it looks like you are first doing this:
initExcelfile(response.getOutputStream())
which is throwing an exception. Then in the exception handler you appear to be trying to redirect to a JSP to produce an error message. Unfortunately, that is failing because:
the JSP is going to call getWriter() on the response object to find the place to send its output,
you have already called getOutputStream() on the response object, and
you cannot call both getWriter() and getOutputStream() on the same Response object ... or you will get an IllegalStateException!
If you are going to write your spreadsheet directly to the output, you CANNOT redirect to a JSP in the event of failure. Even if the servlet framework allowed it (it doesn't!), you would be liable to get a partial spreadsheet with an error page tacked on the end. The user's web browser wouldn't be able to make sense of that.
There are two alternatives:
Get rid of that attempted redirect in the case where you get an exception while generating the spreadsheet.
Keep the redirect, but change your code so that you prepare and buffer the spreadsheet. Only open the response output stream after you have successfully generated the spreadsheet.
There is also the question of what is causing the exception in the first place. There are no obvious clues that I can see, so you will need to debug that yourself. (For example, you could attach a debugger and set a breakpoint in the exception handler, and look at the caught exception's class, message and callstack.)

#EJB inject does not work in my resteasy web service

I am creating a resteasy web service using hibernate jpa framework and ejb implementation.
I created a dynamic web project and my project structure are as follow:
WebApplication.java
public class WebApplication extends Application {
private Set<Class<?>> classes = new HashSet<Class<?>>();
private Set<Object> singletons = new HashSet<Object>();
#EJB
private PersonEndpoint personEndpoint;
public WebApplication(){
classes.add(PersonEndpointBean.class);
}
#Override
public Set<Object> getSingletons(){
return singletons;
}
#Override
public Set<Class<?>> getClasses(){
return classes;
}
}
PersonEndpoint.java
public interface PersonEndpoint {
public Response creaatePersonEndpoint(Person person);
public Response updatePersonEndpoint(Person person);
public Response deletePersonEndpoint(int id);
public Response retrievePersonEndpoint(int id);
public Response retrieveAllPerson();
}
PersonEndpointBean.java
#Stateless
#Local(PersonEndpoint.class)
#Path("/Person")
#Consumes({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
#Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
public class PersonEndpointBean implements PersonEndpoint{
#EJB
private PersonService service;
public PersonEndpointBean(PersonService service){
this.service = service;
}
public PersonEndpointBean(){
super();
}
#Override
#POST
#Path("/Create")
public Response creaatePersonEndpoint(Person person) {
return service.createPerson(person);
}
#Override
#POST
#Path("/Update")
public Response updatePersonEndpoint(Person person) {
return service.updatePerson(person);
}
#Override
#POST
#Path("/Delete")
public Response deletePersonEndpoint(int id) {
return service.deletePerson(id);
}
#Override
#GET
#Path("/Search/{id}")
public Response retrievePersonEndpoint(#PathParam("id") int id) {
return service.retrievePerson(id);
}
#Override
#GET
#Path("/Search")
public Response retrieveAllPerson() {
System.out.println("==========");
return service.retrieveAllPerson();
}
}
Beans.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/beans_1_0.xsd">
</beans>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:web="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd
http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-
app_2_4.xsd" id="WebApp_ID" version="2.4">
<display-name>JPAandEJB</display-name>
<context-param>
<param-name>resteasy.async.job.service.base.path</param-name>
<param-value>/asynch/jobs</param-value>
</context-param>
<servlet>
<servlet-name>resteasy-servlet</servlet-name>
<servlet-class>
org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher
</servlet-class>
<init-param>
<param-name>javax.ws.rs.Application</param-name>
<param-value>com.ph.application.WebApplication</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>resteasy-servlet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
PersonService.java
public interface PersonService {
public Response createPerson(Person person);
public Response updatePerson(Person person);
public Response deletePerson(int id);
public Response retrievePerson(int id);
public Response retrieveAllPerson();
}
PersonServiceBean.java
#Stateless
#Local(PersonService.class)
public class PersonServiceBean implements PersonService{
#EJB
private PersonDao dao;
public PersonServiceBean(PersonDao dao){
this.dao = dao;
}
public PersonServiceBean(){
super();
}
#Override
public Response createPerson(Person person) {
try{
if(person != null){
dao.insertToTable(person);
return Response.status(Response.Status.CREATED).build();
} else{
return Response.status(Response.Status.BAD_REQUEST).build();
}
} catch(Exception e){
e.printStackTrace();
return Response.status(Response.Status.INTERNAL_SERVER_ERROR).build();
}
}
#Override
public Response updatePerson(Person person) {
try{
if(person != null){
dao.updateToTable(person);
return Response.status(Response.Status.ACCEPTED).build();
} else{
return Response.status(Response.Status.BAD_REQUEST).build();
}
} catch(Exception e){
e.printStackTrace();
return Response.status(Response.Status.INTERNAL_SERVER_ERROR).build();
}
}
#Override
public Response deletePerson(int id) {
try{
Person person = dao.getRowToTable(id);
dao.deleteToTable(person);
return Response.status(Response.Status.ACCEPTED).build();
} catch(Exception e){
e.printStackTrace();
return Response.status(Response.Status.INTERNAL_SERVER_ERROR).build();
}
}
#Override
public Response retrievePerson(int id) {
try{
Person person = dao.getRowToTable(id);
return Response.status(Response.Status.ACCEPTED).entity(person).build();
} catch(Exception e){
e.printStackTrace();
return Response.status(Response.Status.INTERNAL_SERVER_ERROR).build();
}
}
#Override
public Response retrieveAllPerson() {
try{
List<Person> list = dao.getListToTable();
System.out.println("===========>" + list.size());
return Response.status(Response.Status.ACCEPTED).entity(list).build();
} catch(Exception e){
e.printStackTrace();
return Response.status(Response.Status.INTERNAL_SERVER_ERROR).build();
}
}
}
When i try to invoke the GET method using postman I get the following error logs.
09:24:05,589 ERROR [io.undertow.request] (default task-2) UT005023: Exception handling request to /SERVICE/Person/Search: org.jboss.resteasy.spi.UnhandledException: java.lang.NullPointerException
at org.jboss.resteasy.core.ExceptionHandler.handleApplicationException(ExceptionHandler.java:77)
at org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:220)
at org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:175)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:418)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:209)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:221)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:805)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at com.ph.endpoint.PersonEndpointBean.retrieveAllPerson(PersonEndpointBean.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:139)
at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:236)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:402)
... 43 more
I've search a lot of forum but it seems none is working.. TIA

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException in REST with Spring

I am trying to create REST service using Spring.When I try to access that service it returns proper data but shows -
Exception handling request to /RESTServ/user/2: org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:113) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:240) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:227) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:73) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:146) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:177) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:727) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_45]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_45]
at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_45]
Caused by: java.lang.NullPointerException
at java.util.ArrayList.<init>(ArrayList.java:177) [rt.jar:1.8.0_45]
at io.undertow.servlet.spec.HttpServletResponseImpl.getHeaders(HttpServletResponseImpl.java:248) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
at org.springframework.http.server.ServletServerHttpResponse$ServletResponseHttpHeaders.get(ServletServerHttpResponse.java:160) [spring-web-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.http.server.ServletServerHttpResponse$ServletResponseHttpHeaders.containsKey(ServletServerHttpResponse.java:142) [spring-web-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.addContentDispositionHeader(AbstractMessageConverterMethodProcessor.java:349) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:221) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:153) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:165) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:80) [spring-web-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:126) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
... 30 more
Can anyone help me with this problem? I have checked for the data it returns and it is not null by applying breakpoints but still it shows above exception.
EDITED:
Code is:
User.java
package com.rest.service;
public class User {
private int userid;
private String firstName;
private String lastName;
private String email;
public int getUserid() {
return userid;
}
public void setUserid(int userid) {
this.userid = userid;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
#Override
public String toString() {
return "User [userid=" + userid + ", firstName=" + firstName
+ ", lastName=" + lastName + ", email=" + email + "]";
}
}
SpringServiceController.java
package com.rest.controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import com.rest.dao.UserService;
import com.rest.service.User;
#RestController
#RequestMapping("/user/")
public class SpringServiceController {
UserService userService = new UserService();
#RequestMapping(value = "/{id}", method = RequestMethod.GET, headers = "Accept=application/json")
public User getUser(#PathVariable int id) {
User user = userService.getUserById(id);
return user;
}
}
I am getting data from database using UserService.java
DBUtility is class to connect to JDBC
package com.rest.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import com.rest.service.User;
import com.rest.utility.DBUtility;
public class UserService {
private Connection connection;
public UserService() {
connection = DBUtility.getConnection();
}
public List<User> getAllUsers() {
List<User> users = new ArrayList<User>();
try {
Statement statement = connection.createStatement();
ResultSet rs = statement
.executeQuery("select * from tblUser");
while (rs.next()) {
User user = new User();
user.setUserid(rs.getInt("userid"));
user.setFirstName(rs.getString("firstname"));
user.setLastName(rs.getString("lastname"));
user.setEmail(rs.getString("email"));
users.add(user);
}
} catch (SQLException e) {
e.printStackTrace();
}
return users;
}
public User getUserById(int userId) {
User user = new User();
try {
PreparedStatement preparedStatement = connection.prepareStatement("select * from tblUser where userid=?");
preparedStatement.setInt(1, userId);
ResultSet rs = preparedStatement.executeQuery();
if (rs.next()) {
user.setUserid(rs.getInt("userid"));
user.setFirstName(rs.getString("firstname"));
user.setLastName(rs.getString("lastname"));
user.setEmail(rs.getString("email"));
}
} catch (SQLException e) {
e.printStackTrace();
}catch (Exception e) {
System.out.println("Exception is: "+e);
e.printStackTrace();
}
return user;
}
}
My web.xml is
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>RESTServ</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>rest</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/rest-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>rest</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
</web-app>
And this is my rest-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation=" http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">
<context:component-scan base-package="com.rest.controller" />
<mvc:annotation-driven />
</beans>
PS: One more thing when I delete annotation-driven tag from spring xml file then it works for simple datatype. But it doesn't work where json conversion is required.I am using WildFly - 8.1

this is an issue with WildFly - 8.1 you have to use WildFly - 8.2 or use Jboss 7.

We faced this issue while trial to migrate spring-boot-1.2.2-Final on wildfly 8.1.0-Final to spring-boot-1.3.2-Final on wildfly 8.1.0-Final.
This error does not occur on wildfly 8.2.1-Final, so if you have option tp udate your wildfly version, you should do that.
But if you still have to use wildfly-8.1.0-Final, then you could patch it.
1) get https://github.com/undertow-io/undertow/archive/1.0.15.Final.zip
2) edit io.undertow.servlet.spec.HttpServletResponseImpl located in module servlet
#Override
public String getHeaders(final String name) {
return new ArrayList<String>(exchange.getResponseHeaders().get(name));
}
to
#Override
public Collection<String> getHeaders(final String name) {
final HeaderValues headerValues = exchange.getResponseHeaders().get(name);
if (headerValues != null) {
return new ArrayList<String>(headerValues);
}
return new ArrayList<String>();
}
Add the HeaderValues import:
import io.undertow.util.HeaderValues;
package undertow-servlet with maven and then overwrite
{wildfly-root-directory}/modules/system/layers/base/io/undertow/servlet/main/undertow-servlet-1.0.15.Final.jar
with the file
{undertow-root-directory}/servlet/target/undertow-servlet-1.0.15.Final.jar
This will solve this error.

If your are using maven, add JSON Databinding dependencies specified below in your pom.xml and annotate the User class with #JsonRootName(value = "user"),
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-jaxrs</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-xc</artifactId>
<version>1.9.13</version>
</dependency>

This may be helpful to those who aren't able to upgrade past Wildfly 8.1.0 in their project to address this problem. Ingvar's answer above of patching the code helped me out a lot, and here is a script that will perform the patch in one command for you (keeping a backup of your previous copy):
https://github.com/ldojo/wf-8.1.0-undertow-1.0.15-patch

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.