关键是我有一个使用“@EnableJpaRepositories”加载的自定义JPA存储库，但是在这个自定义JPA存储库中我自动装备了另一个用@Component注释的Spring Bean，但它永远不会被填充，总是带来一个空引用...
我读到JPA Repository确实加入并共享相同的Spring Application Context，因此它无法看到通用应用程序上下文加载的那些Bean ...这是真的吗？如果是这样，有没有办法粘合它们并使自定义存储库正确地注入我的组件???
这里有相关代码：
public class DefaultCrudRepository<T extends IdentifiableEntity> extends QuerydslJpaRepository<T, BigInteger>
implements CrudRepository<T> {
private static final EntityPathResolver DEFAULT_ENTITY_PATH_RESOLVER = SimpleEntityPathResolver.INSTANCE;
private JpaEntityInformation<T, BigInteger> jpaEntityInformation;
private EntityManager entityManager;
private EntityPath<T> path;
private PathBuilder<T> builder;
private Querydsl querydsl;
@Autowired
private SortComponent sortComponent;
@Autowired
private PageComponent pageComponent;
@Autowired
private FilterComponent filterComponent;
@Autowired
private ExpandComponent expandComponent;
public DefaultCrudRepository(JpaEntityInformation<T, BigInteger> jpaEntityInformation, EntityManager entityManager,
EntityPathResolver resolver) {
super(jpaEntityInformation, entityManager, resolver);
this.jpaEntityInformation = jpaEntityInformation;
this.entityManager = entityManager;
this.path = resolver.createPath(jpaEntityInformation.getJavaType());
this.builder = new PathBuilder<T>(path.getType(), path.getMetadata());
this.querydsl = new Querydsl(entityManager, builder);
this.expandComponent = new DefaultExpandComponent(entityManager);
this.sortComponent = new DefaultSortComponent();
this.filterComponent = new DefaultFilterComponent();
this.pageComponent = new DefaultPageComponent();
init();
}
public DefaultCrudRepository(JpaEntityInformation<T, BigInteger> jpaEntityInformation,
EntityManager entityManager) {
this(jpaEntityInformation, entityManager, DEFAULT_ENTITY_PATH_RESOLVER);
this.jpaEntityInformation = jpaEntityInformation;
this.entityManager = entityManager;
}
/*
* private Class<?> getDomainClass(Class<?> clazz) { Type type =
* clazz.getGenericSuperclass(); if (type instanceof ParameterizedType) {
* ParameterizedType parameterizedType = (ParameterizedType) type; return
* (Class<?>) parameterizedType.getActualTypeArguments()[0]; } else { return
* getDomainClass(clazz.getSuperclass()); } }
*/
@PostConstruct
private void init() {
this.filterComponent.init(this.jpaEntityInformation.getJavaType());
this.expandComponent.init(this.jpaEntityInformation.getJavaType());
}
@Override
public <S extends T> List<S> save(Iterable<S> entities) {
List<S> savedEntities = super.save(entities);
super.flush();
this.entityManager.refresh(savedEntities);
return savedEntities;
}
@Override
public <S extends T> S save(S entity) {
S savedEntity = super.save(entity);
super.flush();
if (!this.jpaEntityInformation.isNew(entity)) {
this.entityManager.refresh(savedEntity);
}
return savedEntity;
}
protected JPQLQuery<T> createQuery(final Predicate predicate, final EntityGraph<?> entityGraph) {
JPQLQuery<?> query = createQuery(predicate);
if (entityGraph != null) {
((AbstractJPAQuery<?, ?>) query).setHint(EntityGraphType.LOAD.getKey(), entityGraph);
}
return query.select(path);
}
protected Page<T> findAll(final Pageable pageable, final Predicate predicate, final EntityGraph<?> entityGraph) {
final JPQLQuery<?> countQuery = createCountQuery(predicate);
JPQLQuery<T> query = querydsl.applyPagination(pageable, createQuery(predicate, entityGraph));
return PageableExecutionUtils.getPage(query.fetch(), pageable, new LongSupplier() {
@Override
public long getAsLong() {
return countQuery.fetchCount();
}
});
}
@Override
public Page<T> findAll(Integer pageNumber, Integer pageSize, BooleanExpression booleanExpression,
String filterExpression, String sortExpression, String expandExpression)
throws InvalidFilterExpressionException, InvalidSortExpressionException,
InvalidExpandExpressionException {
Sort sort = null;
if (sortExpression != null && !sortExpression.isEmpty()) {
sort = this.sortComponent.getSort(sortExpression);
}
Pageable pageable = this.pageComponent.getPage(pageNumber, pageSize, sort);
BooleanExpression filterBooleanExpression = null;
if (filterExpression != null) {
filterBooleanExpression = this.filterComponent.getBooleanExpression(filterExpression);
}
BooleanExpression mergedBooleanExpression = null;
if (booleanExpression != null && filterBooleanExpression != null) {
mergedBooleanExpression = booleanExpression.and(filterBooleanExpression);
} else if (booleanExpression != null && filterBooleanExpression == null) {
mergedBooleanExpression = booleanExpression;
} else if (booleanExpression == null && filterBooleanExpression != null) {
mergedBooleanExpression = filterBooleanExpression;
}
EntityGraph<?> entityGraph = null;
if (expandExpression != null && !expandExpression.isEmpty()) {
entityGraph = this.expandComponent.getEntityGraph(expandExpression);
}
return this.findAll(pageable, mergedBooleanExpression, entityGraph);
}
protected Predicate getPredicate(final BigInteger identifier, final Predicate predicate) {
Class<?> clazz = this.jpaEntityInformation.getJavaType();
String name = CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_CAMEL, clazz.getSimpleName());
Path<?> rootPath = Expressions.path(this.jpaEntityInformation.getJavaType(), name);
Class<?> idType = this.jpaEntityInformation.getIdType();
String idAttributeName = this.jpaEntityInformation.getIdAttribute().getName();
Path<?> leftPath = Expressions.path(idType, rootPath, idAttributeName);
Expression<?> rightExpression = Expressions.constant(identifier);
BooleanExpression booleanExpression = Expressions.predicate(Ops.EQ, leftPath, rightExpression);
BooleanBuilder booleanBuilder = new BooleanBuilder(booleanExpression);
booleanBuilder.and(predicate);
return booleanBuilder.getValue();
}
protected T findOne(final BigInteger identifier, final BooleanExpression booleanExpression,
final EntityGraph<?> entityGraph) {
Assert.notNull(identifier, "The given id must not be null!");
T object = null;
if (booleanExpression != null) {
Predicate mergedPredicate = getPredicate(identifier, booleanExpression);
JPQLQuery<T> query = createQuery(mergedPredicate, entityGraph);
object = query.fetchOne();
} else {
Map<String, Object> hints = new HashMap<String, Object>();
if (entityGraph != null) {
hints.put("javax.persistence.loadgraph", entityGraph);
}
object = this.entityManager.find(this.jpaEntityInformation.getJavaType(), identifier, hints);
}
return object;
}
@Override
public T findOne(final BigInteger identifier, final BooleanExpression booleanExpression,
final String expandExpression) throws InvalidExpandExpressionException {
EntityGraph<?> entityGraph = null;
if (booleanExpression != null) {
entityGraph = this.expandComponent.getEntityGraph(expandExpression);
}
return this.findOne(identifier, booleanExpression, entityGraph);
}
@Override
public Map<Number, T> findAllRevisions(final BigInteger identifier) {
Assert.notNull(identifier, "The given id must not be null!");
AuditReader auditReader = AuditReaderFactory.get(this.entityManager);
List<Number> revisionList = auditReader.getRevisions(this.jpaEntityInformation.getJavaType(), identifier);
if (revisionList == null || revisionList.isEmpty()) {
return null;
}
Set<Number> revisionSet = new LinkedHashSet<Number>(revisionList);
return auditReader.findRevisions(this.jpaEntityInformation.getJavaType(), revisionSet);
}
@Override
public void delete(Iterable<? extends T> entities) {
super.delete(entities);
super.flush();
}
@Override
public void delete(T entity) {
super.delete(entity);
super.flush();
}
}
public class AbstractCrudService<T extends IdentifiableEntity> implements CrudService<T> {
@Autowired(required=false)
private CrudRepository<T> repository;
@Autowired(required=false)
private NotificationComponent<T> notificationComponent;
private NotificationContext<T> geNotificationContext(String action, List<T> payload) {
DefaultNotificationContext<T> defaultNotificationContext = new DefaultNotificationContext<T>();
/*defaultNotificationContext.setAction(action);
defaultNotificationContext.setObject(this.domainClazz.getSimpleName());
defaultNotificationContext.setInstant(Instant.now());
defaultNotificationContext.setResponsibleId(null);
defaultNotificationContext.setPayload(payload);*/
return defaultNotificationContext;
}
private NotificationContext<T> geNotificationContext(String action, Page<T> payload) {
return geNotificationContext(action, payload.getContent());
}
private NotificationContext<T> geNotificationContext(String action, T payload) {
List<T> payloadList = new ArrayList<T>();
payloadList.add(payload);
return geNotificationContext(action, payloadList);
}
@Override
@Transactional(dontRollbackOn = LongTermRunningException.class)
@TypeTaskCriteria(pre = PreSaveTask.class, post = PostSaveTask.class, referenceGenericType = AbstractCrudService.class)
public List<T> save(List<T> objects)
throws ConcurrentModificationException, UnexpectedException {
List<T> savedObjectList = this.repository.save(objects);
if (this.notificationComponent != null) {
this.notificationComponent.notify(geNotificationContext(NotificationContext.SAVE, savedObjectList));
}
return savedObjectList;
}
@Override
@Transactional(dontRollbackOn = LongTermRunningException.class)
@TypeTaskCriteria(pre = PreSaveTask.class, post = PostSaveTask.class, referenceGenericType = AbstractCrudService.class)
public T save(T object) throws ConcurrentModificationException, UnexpectedException {
T savedObject = this.repository.save(object);
if (this.notificationComponent != null) {
this.notificationComponent.notify(geNotificationContext(NotificationContext.SAVE, savedObject));
}
return savedObject;
}
@Override
@TypeTaskCriteria(pre = PreRetrieveTask.class, post = PostRetrieveTask.class, referenceGenericType = AbstractCrudService.class)
public Page<T> retrieve(
@P(PAGE_NUMBER) final Integer pageNumber,
@P(PAGE_SIZE) final Integer pageSize,
@P(FILTER_EXPRESSION) final String filterExpression,
@P(SORT_EXPRESSION) final String sortExpression,
@P(EXPAND_EXPRESSION) final String expandExpression,
@P(PARAMETERS) final Map<String, String> parameters) throws InvalidParameterException, UnexpectedException {
DefaultRetrieveTaskContext context = TaskContextHolder.getContext();
BooleanExpression booleanExpression = context.getBooleanExpression();
Page<T> page = null;
try {
page = new Page<T>(this.repository.findAll(pageNumber, pageSize, booleanExpression, filterExpression, sortExpression, expandExpression));
} catch (InvalidFilterExpressionException | InvalidSortExpressionException
| InvalidExpandExpressionException e) {
throw new UnexpectedException(e);
}
if (this.notificationComponent != null) {
this.notificationComponent.notify(geNotificationContext(NotificationContext.RETRIEVE, page));
}
return page;
}
@Override
@TypeTaskCriteria(pre = PreRetrieveTask.class, post = PostRetrieveTask.class, referenceGenericType = AbstractCrudService.class)
public T retrieve(BigInteger identifyer, String expandExpression) throws NotFoundException, UnexpectedException {
RetrieveTaskContext context = TaskContextHolder.getContext();
BooleanExpression booleanExpression = context.getBooleanExpression();
T object = null;
try {
object = this.repository.findOne(identifyer, booleanExpression, expandExpression);
} catch (InvalidExpandExpressionException invalidExpandExpressionException) {
throw new UnexpectedException(invalidExpandExpressionException);
}
if (this.notificationComponent != null) {
this.notificationComponent.notify(geNotificationContext(NotificationContext.RETRIEVE, object));
}
return object;
}
@Override
@Transactional(dontRollbackOn = LongTermRunningException.class)
@TypeTaskCriteria(pre = PreDeleteTask.class, post = PostDeleteTask.class, referenceGenericType = AbstractCrudService.class)
public void delete(List<T> objects) throws ConcurrentModificationException, UnexpectedException {
this.repository.delete(objects);
if (this.notificationComponent != null) {
this.notificationComponent.notify(geNotificationContext(NotificationContext.DELETE, (List<T>) null));
}
}
@Override
@Transactional(dontRollbackOn = LongTermRunningException.class)
@TypeTaskCriteria(pre = PreDeleteTask.class, post = PostDeleteTask.class, referenceGenericType = AbstractCrudService.class)
public void delete(T object) throws ConcurrentModificationException, UnexpectedException {
this.repository.delete(object);
if (this.notificationComponent != null) {
this.notificationComponent.notify(geNotificationContext(NotificationContext.DELETE, (T) null));
}
}
}
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(value = "br.org.ccee", repositoryFactoryBeanClass = CrudRepositoryFactoryBean.class)
@EnableAspectJAutoProxy
public class ServiceConfiguration {
@Bean
//@Scope("request")
public ServiceContext serviceContext() {
DefaultServiceContext defaultServiceContext = new DefaultServiceContext();
defaultServiceContext.setInstant(Instant.now());
defaultServiceContext.setUserId(new BigInteger("33"));
defaultServiceContext.setTenantId(new BigInteger("69"));
return defaultServiceContext;
}
@Bean
public TenantEventListener tenantEventListener() {
return new TenantEventListener();
}
@Bean
public AuditEventListener auditEventListener() {
return new AuditEventListener();
}
@Bean
public EventListenerRegistry eventListenerRegistry(
LocalContainerEntityManagerFactoryBean entityManagerFactory,
TenantEventListener tenantEventListener,
AuditEventListener auditEventListener) {
SessionFactoryImpl sessionFactoryImpl = (SessionFactoryImpl) entityManagerFactory.getNativeEntityManagerFactory();
ServiceRegistryImplementor serviceRegistryImplementor = sessionFactoryImpl.getServiceRegistry();
EventListenerRegistry eventListenerRegistry = serviceRegistryImplementor.getService(EventListenerRegistry.class);
eventListenerRegistry.prependListeners(EventType.PRE_INSERT, auditEventListener);
eventListenerRegistry.prependListeners(EventType.PRE_INSERT, tenantEventListener);
eventListenerRegistry.prependListeners(EventType.PRE_UPDATE, auditEventListener);
return eventListenerRegistry;
}
}
答案 0 :(得分：0)
public class DefaultCrudRepository<T extends IdentifiableEntity> extends QueryDslJpaRepository<T, BigInteger>
implements CrudRepository<T> {
private static final EntityPathResolver DEFAULT_ENTITY_PATH_RESOLVER = SimpleEntityPathResolver.INSTANCE;
private JpaEntityInformation<T, BigInteger> jpaEntityInformation;
private EntityManager entityManager;
private EntityPath<T> path;
private PathBuilder<T> builder;
private Querydsl querydsl;
@Autowired
private SortComponent sortComponent;
@Autowired
private PageComponent pageComponent;
@Autowired
private FilterComponent filterComponent;
@Autowired
private ExpandComponent expandComponent;