I'm using Spring #Scope(value = "session", proxyMode=ScopedProxyMode.TARGET_CLASS) beans for objects that should be shared across a single Http-Session. This will provide for example one "Project" object for each User who is using my application.
To get this working I had to implement an interceptor for Hibernate that is returning the name of the class:
public class EntityProxySupportHibernateInterceptor extends EmptyInterceptor {
private static final long serialVersionUID = 7470168733867103334L;
#Override
public String getEntityName(Object object) {
return AopUtils.getTargetClass(object).getName();
}
}
With this interceptor I can use a Spring CrudRepository to save a Project-entity in the database:
#Repository
public interface ProjectRepository extends CrudRepository<Project, Integer> {
Project findByProjectId(int projectId);
}
Project-entity:
#Component
#Entity
#Table(name = "xxx.projects")
#Scope(value="session", proxyMode=ScopedProxyMode.TARGET_CLASS)
public class Project implements Serializable {
private static final long serialVersionUID = -8071542032564334337L;
private int projectId;
private int projectType;
#Id
#Column(name = "project_id")
public int getProjectId() {
return projectId;
}
public void setProjectId(int projectId) {
this.projectId = projectId;
}
#Column(name = "project_type")
public int getProjectType() {
return projectType;
}
public void setProjectType(int projectType) {
this.projectType = projectType;
}
}
Storing the Project in the database works as expected. I can have a look at the database and the correct values are inserted. Now I have a different entity that I'm creating the same way as the project and that I want to save in the database via a CrudRepository.
Here the problem begins. Hibernate is not inserting the values that I have set. Hibernate always only inserts null into the database. Reading the values in my Spring application is working as expected. I think that Hibernate is not using the proxy of the entity but the underlying blueprint of the object. How can I force Hibernate to use the proxy with the correct values?
Repository:
#Repository("DataInput001Repository")
public interface DataInputRepository extends CrudRepository<DataInput, DataInputId> {}
Entity:
#Component("DataInput001")
#Entity
#Table(name = "xx.data_input_001")
#Scope(value="session", proxyMode=ScopedProxyMode.TARGET_CLASS)
#IdClass(DatanputId.class)
public class DataInput implements Serializable {
private static final long serialVersionUID = -6941087210396795612L;
#Id
#Column(name = "project_id")
private int projectId;
#Column(name = "income")
private String income;
#Column(name = "income_increase")
private String incomeIncrease;
/* Getter + Setter */
}
Service:
#Service("DataInputService001")
public class DataInputServiceImpl implements DataInputService {
#Resource(name = "DataInputMapper001")
DataInputMapperImpl dataInputMapper;
#Resource(name = "DataInput001Repository")
DataInputRepository dataInputRepository;
#Resource(name = "DataInput001")
DataInput datanInput;
#Transactional
public void createDataInput(String json) throws Exception {
dataInputMapper.mapDataInput(json);
dataInputRepository.save(dataInput);
}
public DataInput getDataInput() {
return dataInput;
}
public void setDataInput(DataInput dataInput) {
this.dataInput = dataInput;
}
}
Related
I have a Spring Boot application in which I have created an entity, a repository and a service.
I save entities in the database via transactions and everything works fine, my database is populated as I would expect. Also, I should mention that my database is created in PHPMyAdmin.
I also created a repository in order to fetch some data from the database by extending the Crud Repository. I also have a service which stores the methods that call the repository.
Though, none of the methods I have return anything ( my database is not empty ) and I do not know why. I have also tried adding #EnableJpaRepositories and #ComponentScan for the entity, but this did not work. Below are my classes:
The entity ( I will not put all the getters and setters here) :
#Entity
#Table(name = "matches", schema = "tennis", catalog = "")
public class MatchesEntity {
private int id;
private String namePlayer1;
private String namePlayer2;
private int setsPlayer1;
private int setsPlayer2;
private String odd1;
private String odd2;
private String competition;
private String surface;
private String status;
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#Basic
#Column(name = "Name_player1")
public String getNamePlayer1() {
return namePlayer1;
}
public void setNamePlayer1(String namePlayer1) {
this.namePlayer1 = namePlayer1;
}
#Basic
#Column(name = "Name_player2")
public String getNamePlayer2() {
return namePlayer2;
}
// other getter & setters
}
The repository:
#Repository
public interface MatchesRepository extends CrudRepository<MatchesEntity,
Integer> {
List<MatchesEntity> getAllBySurface(String surface);
}
The service:
#Service
public class MatchesService {
#Autowired
MatchesRepository matchesRepository;
public int countMatchesOnHard() {
return matchesRepository.getAllBySurface("hard").size();
}
public MatchesEntity findMatchById() {
return matchesRepository.findById(2378).get();
}
}
The main class:
#SpringBootApplication
#EnableJpaRepositories(basePackageClasses={MatchesRepository.class})
#EntityScan(basePackageClasses=MatchesEntity.class)
public class PicksApplication {
#Autowired
static MatchesService matchesService;
public static void main(String[] args) {
MatchesEntity matchesEntity = matchesService.findMatchById();
int numberOfMatchesOnHard = matchesService.countMatchesOnHard();
System.out.println(numberOfMatchesOnHard);
}
}
Any method I try which is repository related returns null.
Can anyone help me with a suggestion ?
Your main class PicksApplication is troublesome. The main method must trigger SpringApplication.run for the spring boot to initialize itself & the context for autowires to work. You are breaking all that within your code. You can utilize CommandLineRunner and add your code in run() method.
Like this;
#SpringBootApplication
public class PicksApplication implements CommandLineRunner {
#Autowired
private MatchesService matchesService;
public static void main(String[] args) {
SpringApplication.run(PicksApplication.class, args);
}
#Override
public void run(String... args) throws Exception {
MatchesEntity matchesEntity = matchesService.findMatchById();
int numberOfMatchesOnHard = matchesService.countMatchesOnHard();
System.out.println(numberOfMatchesOnHard);
}
}
then it ought to work, rest of the code looks OK
I want to get some data from Neo4j using Spring boot, but I always get nothing. In other words, it seems that java cannot get the data from the neo4j database.
The code is written according to the neo4j Spring tutorial.https://neo4j.com/developer/spring-data-neo4j/
domain class
#NodeEntity
public class Weather {
#Id
#GeneratedValue
private Long id;
private String name;
#Relationship(type = "HAS_INSTANCE")
private List<Instance> instances = new ArrayList<>();
#Relationship(type = "HAS_CHARACTERISTIC")
private List<Characteristic> characteristics = new ArrayList<>();
...
}
repository class
#RepositoryRestResource(collectionResourceRel = "weathers", path = "weathers")
public interface WeatherRepository extends Neo4jRepository<Weather, Long> {
}
service class
#Service
public class WeatherService {
private final WeatherRepository weatherRepository;
public WeatherService(WeatherRepository weatherRepository){
this.weatherRepository = weatherRepository;
}
#Transactional(readOnly = true)
public Iterable<Weather> findAll(){
Iterable<Weather> result = weatherRepository.findAll();
return result;
}
}
controller class
#RestController
#RequestMapping("/")
public class WeatherController {
private final WeatherService weatherService;
public WeatherController(WeatherService weatherService){
this.weatherService = weatherService;
}
#GetMapping("/findAll")
public Iterable<Weather> findAll(){
return weatherService.findAll();
}
}
And the username and password configuration are in the application.properties.
Could someone help me about it? Thanks!
I have a class DatabaseInitializer which inserts some data via crudrepositories into my database. Now I added an EntityListener which should update a number in another table (table 2), if the date of the entity is not present in table 2. For this I try #Autowired with the crudrepository for this entity. But the repository isn't autowired correctly, it's always null.
The EntityListener:
#Component
public class OrderDayIdListener {
#Autowired
private static OrderRepository orderRepository;
#Autowired
private OrderDayIdRepository orderDayIdRepository;
#PrePersist
private void incrementOrderIdInTable(Order order) {
LocalDate date = order.getDate();
OrderDayId orderDayIdObject = orderDayIdRepository.findByDate(date);
if(orderDayIdObject == null){
orderDayIdObject = new OrderDayId(1L, date);
} else {
orderDayIdObject.incrementId();
}
Long orderDayId = orderDayIdObject.getId();
order.setOrderDayId(orderDayId);
orderDayIdRepository.save(orderDayIdObject);
orderRepository.save(order);
}
}
The Entity:
#EntityListeners(OrderDayIdListener.class)
#Data
#Entity
public class Order {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id", updatable = false, nullable = false)
private Long id;
#Column(name ="date")
private LocalDate date;
}
As I know you cannot inject spring managed beans into a JPA EntityListener.
What I have found is to create helper class for do the job:
public final class AutowireHelper implements ApplicationContextAware {
private static final AutowireHelper INSTANCE = new AutowireHelper();
private static ApplicationContext applicationContext;
private AutowireHelper() {
}
/**
* Tries to autowire the specified instance of the class if one of the specified beans which need to be autowired
* are null.
*
* #param classToAutowire the instance of the class which holds #Autowire annotations
* #param beansToAutowireInClass the beans which have the #Autowire annotation in the specified {#classToAutowire}
*/
public static void autowire(Object classToAutowire, Object... beansToAutowireInClass) {
for (Object bean : beansToAutowireInClass) {
if (bean == null) {
applicationContext.getAutowireCapableBeanFactory().autowireBean(classToAutowire);
return;
}
}
}
#Override
public void setApplicationContext(final ApplicationContext applicationContext) {
AutowireHelper.applicationContext = applicationContext;
}
/**
* #return the singleton instance.
*/
public static AutowireHelper getInstance() {
return INSTANCE;
}}
than just do:
public class OrderDayIdListener {
#Autowired
private OrderRepository orderRepository;
#Autowired
private OrderDayIdRepository orderDayIdRepository;
#PrePersist
public void incrementOrderIdInTable(Order order) {
AutowireHelper.autowire(this, this.orderRepository);
AutowireHelper.autowire(this, this.orderDayIdRepository);
LocalDate date = order.getDate();
OrderDayId orderDayIdObject = orderDayIdRepository.findByDate(date);
if(orderDayIdObject == null){
orderDayIdObject = new OrderDayId(1L, date);
} else {
orderDayIdObject.incrementId();
}
Long orderDayId = orderDayIdObject.getId();
order.setOrderDayId(orderDayId);
orderDayIdRepository.save(orderDayIdObject);
orderRepository.save(order);
}}
full explanation here
I've been following a lot of tutorial on how to get a list of result by referencing a specific column in the table.
I have this table.
I want to get the list of result with a plan_code "TEST123"
This is my code:
PlanRepository.java
public interface PlanCoverageRepository extends CrudRepository<PlanCoverage, Long> {
List<PlanCoverage> findAllByPlan_code(String plan_code);
}
PlanCoverageService.java
public interface PlanCoverageService {
public List<PlanCoverage> getAllPlanCoverageByPlanCode(String plan_code);
}
PlanCoverageServiceImpl.java
#Service
#Transactional
public class PlanCoverageServiceImpl implements PlanCoverageService {
#Override
public List<PlanCoverage> getAllPlanCoverageByPlanCode(String plan_code) {
return (List<PlanCoverage>) planCoverageRepository.findAllByPlan_code(plan_code);
}
}
PlanCoverageController.java
#Controller
#RequestMapping(value="/admin")
public class PlanCoverageController {
#Autowired
PlanCoverageService planCoverageService;
#RequestMapping(value="/Test/{plan_code}", method=RequestMethod.GET)
public ModelAndView test(#PathVariable String plan_code) {
ModelAndView model = new ModelAndView();
PlanCoverage planCoverage = (PlanCoverage) planCoverageService.getAllPlanCoverageByPlanCode(plan_code);
model.addObject("planCoverageForm",planCoverage);
model.setViewName("plan_coverage_form");
return model;
}
}
PlanCoverage.java
#Entity
#Table(name="plan_coverage")
public class PlanCoverage {
#Id
#GeneratedValue(strategy= GenerationType.IDENTITY)
private long coverage_id;
#Column(name="plan_code")
private String plan_code;
#Column(name="coverage_description")
private String coverage_description;
/..getters and setters
#ManyToOne()
#JoinColumn(name="plan_code", referencedColumnName = "plan_code",insertable=false, updatable=false)
private Plan plan;
public Plan getPlan() {
return plan;
}
public void setPlan(Plan plan) {
this.plan = plan;
}
}
Please help me. I've been stuck with these for a few days and non of the tutorials seems to work on me. Thank you so much!!
You have messed up with the convention that spring boot is using to compose query methods. The case of the fields in the entity should follow the lower camel-case scheme, like so:
#Column(name="plan_code")
private String planCode;
and then the query method in PlanCoverageRepository should be:
List<PlanCoverage> findAllByPlanCode(String planCode);
I have a CrudRepository that is supposed to make a query with an array (findByIn). In my repository tests it works, but when I try to use the query in my service, it doesn't work. Could someone explain why it doesn't work? Here is my setup (excluding some code irrelevant to the question)
Database model:
#Entity
#Table(name="Place")
public class Place implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "placeId", nullable = false)
private Long placeId;
#Column(name = "owner", nullable = false)
private String owner;
public Long getPlaceId() {
return placeId;
}
public void setPlaceId(Long placeId) {
this.placeId = placeId;
}
public String getOwner() {
return owner;
}
public void setOwner(String owner) {
this.owner = owner;
}
}
Repository:
#Repository
public interface PlaceRepository extends CrudRepository<Place, Long> {
List<Place> findByPlaceIdIn(Long[] placeId);
}
Service (this is the part not working):
#Service
public class PlaceService {
#Autowired
private PlaceRepository placeRepository;
public List<Place> getPlaces(Long[] placeIds) {
return placeRepository.findByPlaceIdIn(placeIds);
}
}
The problem is that in my service placeRepository.findByPlaceIdIn(placeIds) returns 0 objects if placeIds contains more than one item. If placeIds contains just one item, the query works fine. I tried replacing return placeRepository.findByPlaceIdIn(placeIds) with this piece of code that does the query for every array item one by one (this actually works, but I'd like to get the query work as it should):
ArrayList<Place> places = new ArrayList<Place>();
for (Long placeId : placeIds) {
Long[] id = {placeId};
places.addAll(placeRepository.findByPlaceIdIn(id));
}
return places;
I know that the repository should work, because I have a working test for it:
public class PlaceRepositoryTest {
#Autowired
private PlaceRepository repository;
private static Place place;
private static Place place2;
private static Place otherUsersPlace;
#Test
public void testPlacesfindByPlaceIdIn() {
place = new Place();
place.setOwner(USER_ID);
place2 = new Place();
place2.setOwner(USER_ID);
place = repository.save(place);
place2 = repository.save(place2);
Long[] ids = {place.getPlaceId(), place2.getPlaceId()};
assertEquals(repository.findByPlaceIdIn(ids).size(), 2);
}
}
I also have another repository for other model, which also uses findByIn and it works fine. I can't see any relevant difference between the repositories. I thought it might offer some more details to show the working repository, so I included it below:
Database model:
#Entity
#Table(name="LocalDatabaseRow")
#JsonIgnoreProperties(ignoreUnknown=false)
public class LocalDatabaseRow implements Serializable {
public LocalDatabaseRow() {}
public LocalDatabaseRow(RowType rowType) {
this.rowType = rowType;
}
public enum RowType {
TYPE1,
TYPE2
};
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id")
#JsonProperty("id")
private Long id;
#JsonProperty("rowType")
#Column(name = "rowType")
private RowType rowType;
public Long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public RowType getRowType() {
return rowType;
}
public void setRowType(RowType rowType) {
this.rowType = rowType;
}
}
Repository:
#Repository
public interface LocalDatabaseRowRepository extends CrudRepository<LocalDatabaseRow, Long> {
List<LocalDatabaseRow> findByRowTypeAndUserIdIn(RowType type, String[] userId);
}
try using a list instead :
findByPlaceIdIn(List placeIdList);
You have a typo in your code (the repository declaration in the service):
#Autowired
private placeRepository placeRepository;
Should be:
#Autowired
private PlaceRepository placeRepository;