Java PersistenceUnit類代碼示例

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
/**
 * @param args the command line arguments
 */
@PersistenceUnit
public static void main(String[] args) {
    System.out.println("Creating entity information...");
    EntityManager entityManager = Persistence.createEntityManagerFactory("DataAppLibraryPULocal").createEntityManager();
    EntityTransaction et = entityManager.getTransaction();
    et.begin();
    loadDiscountRate(entityManager);
    loadRegion(entityManager);
    loadRole(entityManager);
    loadTransmission(entityManager);
    loadProductType(entityManager);
    loadEngine(entityManager);
    loadProduct(entityManager);
    et.commit();
    
    
    EntityManager specialEntityManager = new InitialLoadEntityManagerProxy(entityManager);
    SalesSimulator simulator = new SalesSimulator(specialEntityManager);
    Calendar cal = Calendar.getInstance();
    int year = cal.get(Calendar.YEAR);
    cal.clear();
    cal.set(year-1, 0, 1, 0, 0, 0); // go back to begining of year, 3 years ago
    System.out.println("Creating historical data...");
    System.out.println("        This may take 5 to 15min depending on machine speed.");
    simulator.run(cal.getTime(), new Date());
    
    entityManager.close();
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
private <X> AnnotatedField<X> decorateUnit(AnnotatedField<X> field) {
    final PersistenceUnit persistenceUnit = field.getAnnotation(PersistenceUnit.class);
    final UniqueIdentifier identifier = UniqueIdentifierLitteral.random();

    Set<Annotation> templateQualifiers = new HashSet<>();
    templateQualifiers.add(ServiceLiteral.SERVICE);
    if (hasUnitName(persistenceUnit)) {
        templateQualifiers.add(new FilterLiteral("(osgi.unit.name=" + persistenceUnit.unitName() + ")"));
    }
    Bean<EntityManagerFactory> bean = manager.getExtension(OsgiExtension.class)
            .globalDependency(EntityManagerFactory.class, templateQualifiers);

    Set<Annotation> qualifiers = new HashSet<>();
    qualifiers.add(identifier);
    Bean<EntityManagerFactory> b = new SimpleBean<>(EntityManagerFactory.class, Dependent.class, Collections.singleton(EntityManagerFactory.class), qualifiers, () -> {
        CreationalContext<EntityManagerFactory> context = manager.createCreationalContext(bean);
        return (EntityManagerFactory) manager.getReference(bean, EntityManagerFactory.class, context);
    });
    beans.add(b);

    Set<Annotation> fieldAnnotations = new HashSet<>();
    fieldAnnotations.add(InjectLiteral.INJECT);
    fieldAnnotations.add(identifier);
    return new SyntheticAnnotatedField<>(field, fieldAnnotations);
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
@Override
public void inject(Object result, Field field) {
  try {

    String unitName = field.getAnnotation(PersistenceUnit.class).unitName();
    if (StringUtils.isEmpty(unitName))
      unitName = PersistenceUnitProvider.DEFAULT_DS;

    if(!field.getType().equals(EntityManagerFactory.class)){

      log.error("Failed to create PersistenceUnit, type of field is not a EntityManagerFactory");
      return;
    }

    EntityManagerFactory emf = provider.getProvider();

    field.setAccessible(true);
    field.set(result, emf);
  } catch (Exception e) {

    log.error("Failed to create PersistenceUnit", e);
  }
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
public void setUp() throws OpenEJBException, NamingException, IOException {
    //avoid linkage error on mac, only used for tests so don't need to add it in Core
    JULLoggerFactory.class.getName();

    final ConfigurationFactory config = new ConfigurationFactory();
    final Assembler assembler = new Assembler();

    assembler.createTransactionManager(config.configureService(TransactionServiceInfo.class));
    assembler.createSecurityService(config.configureService(SecurityServiceInfo.class));

    final AppModule app = new AppModule(this.getClass().getClassLoader(), "test-app");

    final Persistence persistence = new Persistence(new org.apache.openejb.jee.jpa.unit.PersistenceUnit("foo-unit"));
    app.addPersistenceModule(new PersistenceModule("root", persistence));

    final EjbJar ejbJar = new EjbJar();
    ejbJar.addEnterpriseBean(new StatelessBean(SuperBean.class));
    app.getEjbModules().add(new EjbModule(ejbJar));

    final ClientModule clientModule = new ClientModule(null, app.getClassLoader(), app.getJarLocation(), null, null);
    clientModule.getLocalClients().add(this.getClass().getName());

    app.getClientModules().add(clientModule);

    assembler.createApplication(config.configureApplication(app));
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
/**
 * Retrieves and caches {@link Field}s with injection
 *
 * @param field
 * @throws IOException
 */
private void retriveConnection(Field field) throws IOException {

    PersistenceContext context = field.getAnnotation(PersistenceContext.class);
    Resource resource = field.getAnnotation(Resource.class);
    PersistenceUnit unit = field.getAnnotation(PersistenceUnit.class);
    EJB ejbAnnot = field.getAnnotation(EJB.class);
    if (ObjectUtils.notNull(context)) {
        identifyConnections(context, field);
        addAccessibleField(field);
    } else if (ObjectUtils.notNull(resource)) {
        metaData.setTransactionField(field);
        addAccessibleField(field);
    } else if (ObjectUtils.notNull(unit)) {
        addUnitField(field);
        addAccessibleField(field);
    } else if (ObjectUtils.notNull(ejbAnnot)) {
        // caches EJB annotated fields
        cacheInjectFields(field);
        addAccessibleField(field);
    }
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
@Test
public void getPUAnnotatedMembersTest() {
    AnnotationScanner scanner = new AnnotationScanner();
    List<AccessibleObject> members = scanner.getJpaAnnotatedMembers(TestClass.class, PersistenceUnit.class);
    Assert.assertEquals(1, members.size());
    AccessibleObject member = members.get(0);
    Assert.assertEquals(Method.class, member.getClass());
    Method method = (Method)member;
    Assert.assertEquals("setEmf", method.getName());
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
/**
 * When using a factory the class can be an interface. We need to make sure this does not cause a NPE
 */
@Test
public void getFactoryTest() {
    AnnotationScanner scanner = new AnnotationScanner();
    List<AccessibleObject> members = scanner.getJpaAnnotatedMembers(TestInterface.class, PersistenceUnit.class);
    Assert.assertEquals(0, members.size());
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
public <T> void processAnnotatedType(@Observes ProcessAnnotatedType<T> event, BeanManager manager) {
    boolean hasPersistenceField = false;
    for (AnnotatedField<? super T> field : event.getAnnotatedType().getFields()) {
        if (field.isAnnotationPresent(PersistenceContext.class)
                || field.isAnnotationPresent(PersistenceUnit.class)) {
            hasPersistenceField = true;
            break;
        }
    }
    if (hasPersistenceField) {
        PersistenceAnnotatedType<T> pat = new PersistenceAnnotatedType<T>(manager, event.getAnnotatedType());
        beans.addAll(pat.getProducers());
        event.setAnnotatedType(pat);
    }
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
public PersistenceAnnotatedType(BeanManager manager, AnnotatedType<T> delegate) {
    super(delegate);
    this.manager = manager;
    this.fields = new HashSet<>();
    for (AnnotatedField<? super T> field : delegate.getFields()) {
        if (field.isAnnotationPresent(PersistenceContext.class)) {
            field = decorateContext(field);
        } else if (field.isAnnotationPresent(PersistenceUnit.class)) {
            field = decorateUnit(field);
        }
        this.fields.add(field);
    }
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
public PersistenceElement(Member member, AnnotatedElement ae, PropertyDescriptor pd) {
	super(member, pd);
	PersistenceContext pc = ae.getAnnotation(PersistenceContext.class);
	PersistenceUnit pu = ae.getAnnotation(PersistenceUnit.class);
	Class<?> resourceType = EntityManager.class;
	if (pc != null) {
		if (pu != null) {
			throw new IllegalStateException("Member may only be annotated with either " +
					"@PersistenceContext or @PersistenceUnit, not both: " + member);
		}
		Properties properties = null;
		PersistenceProperty[] pps = pc.properties();
		if (!ObjectUtils.isEmpty(pps)) {
			properties = new Properties();
			for (PersistenceProperty pp : pps) {
				properties.setProperty(pp.name(), pp.value());
			}
		}
		this.unitName = pc.unitName();
		this.type = pc.type();
		this.synchronizedWithTransaction = (synchronizationAttribute == null ||
				"SYNCHRONIZED".equals(ReflectionUtils.invokeMethod(synchronizationAttribute, pc).toString()));
		this.properties = properties;
	}
	else {
		resourceType = EntityManagerFactory.class;
		this.unitName = pu.unitName();
	}
	checkResourceType(resourceType);
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
@PersistenceUnit
public void setEmf(EntityManagerFactory emf) {
	if (this.emf != null) {
		throw new IllegalStateException("Already called");
	}
	this.emf = emf;
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
/**
 * Injects the JPA <code>EntityManagerFactory</code> into all fields and methods that are
 * annotated with <code>javax.persistence.PersistenceUnit</code>
 *
 * @param testObject The test object, not null
 */
public void injectEntityManagerFactory(Object testObject, Object target) {
	Set<Field> fields = getFieldsAnnotatedWith(target.getClass(), PersistenceUnit.class);
	Set<Method> methods = getMethodsAnnotatedWith(target.getClass(), PersistenceUnit.class);
    if (fields.isEmpty() && methods.isEmpty()) {
        // Jump out to make sure that we don't try to instantiate the EntityManagerFactory
        return;
    }

    EntityManagerFactory entityManagerFactory = getPersistenceUnit(testObject);
    setFieldAndSetterValue(target, fields, methods, entityManagerFactory);
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
@Test
public void testClassWithMultiplePersistenceUnitFields() throws Exception {
    // GIVEN
    final JCodeModel jCodeModel = new JCodeModel();
    final JPackage jp = jCodeModel.rootPackage();
    final JDefinedClass jClass = jp._class(JMod.PUBLIC, "ClassUnderTest");
    final JFieldVar ruleField = jClass.field(JMod.PUBLIC, JpaUnitRule.class, "rule");
    ruleField.annotate(Rule.class);
    final JInvocation instance = JExpr._new(jCodeModel.ref(JpaUnitRule.class)).arg(JExpr.direct("getClass()"));
    ruleField.init(instance);
    final JFieldVar emf1Field = jClass.field(JMod.PRIVATE, EntityManagerFactory.class, "emf1");
    emf1Field.annotate(PersistenceUnit.class);
    final JFieldVar emf2Field = jClass.field(JMod.PRIVATE, EntityManagerFactory.class, "emf2");
    emf2Field.annotate(PersistenceUnit.class);
    final JMethod jMethod = jClass.method(JMod.PUBLIC, jCodeModel.VOID, "testMethod");
    jMethod.annotate(Test.class);

    buildModel(testFolder.getRoot(), jCodeModel);
    compileModel(testFolder.getRoot());

    final Class<?> cut = loadClass(testFolder.getRoot(), jClass.name());

    try {
        // WHEN
        new JpaUnitRule(cut);
        fail("IllegalArgumentException expected");
    } catch (final IllegalArgumentException e) {

        // THEN
        assertThat(e.getMessage(), containsString("Only single field is allowed"));
    }
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
@Test
public void testClassWithPersistenceContextAndPersistenceUnitFields() throws Exception {
    // GIVEN
    final JCodeModel jCodeModel = new JCodeModel();
    final JPackage jp = jCodeModel.rootPackage();
    final JDefinedClass jClass = jp._class(JMod.PUBLIC, "ClassUnderTest");
    final JFieldVar ruleField = jClass.field(JMod.PUBLIC, JpaUnitRule.class, "rule");
    ruleField.annotate(Rule.class);
    final JInvocation instance = JExpr._new(jCodeModel.ref(JpaUnitRule.class)).arg(JExpr.direct("getClass()"));
    ruleField.init(instance);
    final JFieldVar emf1Field = jClass.field(JMod.PRIVATE, EntityManager.class, "em");
    emf1Field.annotate(PersistenceContext.class);
    final JFieldVar emf2Field = jClass.field(JMod.PRIVATE, EntityManagerFactory.class, "emf");
    emf2Field.annotate(PersistenceUnit.class);
    final JMethod jMethod = jClass.method(JMod.PUBLIC, jCodeModel.VOID, "testMethod");
    jMethod.annotate(Test.class);

    buildModel(testFolder.getRoot(), jCodeModel);
    compileModel(testFolder.getRoot());

    final Class<?> cut = loadClass(testFolder.getRoot(), jClass.name());

    try {
        // WHEN
        new JpaUnitRule(cut);
        fail("IllegalArgumentException expected");
    } catch (final IllegalArgumentException e) {

        // THEN
        assertThat(e.getMessage(), containsString("either @PersistenceUnit or @PersistenceContext"));
    }
}
 

import javax.persistence.PersistenceUnit; //導入依賴的package包/類
@Test
public void testClassWithPersistenceUnitFieldOfWrongType() throws Exception {
    // GIVEN
    final JCodeModel jCodeModel = new JCodeModel();
    final JPackage jp = jCodeModel.rootPackage();
    final JDefinedClass jClass = jp._class(JMod.PUBLIC, "ClassUnderTest");
    final JFieldVar ruleField = jClass.field(JMod.PUBLIC, JpaUnitRule.class, "rule");
    ruleField.annotate(Rule.class);
    final JInvocation instance = JExpr._new(jCodeModel.ref(JpaUnitRule.class)).arg(JExpr.direct("getClass()"));
    ruleField.init(instance);
    final JFieldVar emField = jClass.field(JMod.PRIVATE, EntityManager.class, "emf");
    emField.annotate(PersistenceUnit.class);
    final JMethod jMethod = jClass.method(JMod.PUBLIC, jCodeModel.VOID, "testMethod");
    jMethod.annotate(Test.class);

    buildModel(testFolder.getRoot(), jCodeModel);
    compileModel(testFolder.getRoot());

    final Class<?> cut = loadClass(testFolder.getRoot(), jClass.name());

    try {
        // WHEN
        new JpaUnitRule(cut);
        fail("IllegalArgumentException expected");
    } catch (final IllegalArgumentException e) {

        // THEN
        assertThat(e.getMessage(), containsString("annotated with @PersistenceUnit is not of type EntityManagerFactory"));
    }
}