Java Bean类代码示例

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
private boolean shouldDeployDefaultCamelContext(Set<Bean<?>> beans) {
    return beans.stream()
        // Is there a Camel bean with the @Default qualifier?
        // Excluding internal components...
        .filter(bean -> !bean.getBeanClass().getPackage().equals(getClass().getPackage()))
        .filter(hasType(CamelContextAware.class).or(hasType(Component.class))
            .or(hasType(RouteContainer.class).or(hasType(RoutesBuilder.class))))
        .map(Bean::getQualifiers)
        .flatMap(Set::stream)
        .filter(isEqual(DEFAULT))
        .findAny()
        .isPresent()
        // Or a bean with Camel annotations?
        || concat(camelBeans.stream().map(AnnotatedType::getFields),
                  camelBeans.stream().map(AnnotatedType::getMethods))
        .flatMap(Set::stream)
        .map(Annotated::getAnnotations)
        .flatMap(Set::stream)
        .filter(isAnnotationType(Consume.class).and(a -> ((Consume) a).context().isEmpty())
            .or(isAnnotationType(BeanInject.class).and(a -> ((BeanInject) a).context().isEmpty()))
            .or(isAnnotationType(EndpointInject.class).and(a -> ((EndpointInject) a).context().isEmpty()))
            .or(isAnnotationType(Produce.class).and(a -> ((Produce) a).context().isEmpty()))
            .or(isAnnotationType(PropertyInject.class).and(a -> ((PropertyInject) a).context().isEmpty())))
        .findAny()
        .isPresent()
        // Or an injection point for Camel primitives?
        || beans.stream()
        // Excluding internal components...
        .filter(bean -> !bean.getBeanClass().getPackage().equals(getClass().getPackage()))
        .map(Bean::getInjectionPoints)
        .flatMap(Set::stream)
        .filter(ip -> getRawType(ip.getType()).getName().startsWith("org.apache.camel"))
        .map(InjectionPoint::getQualifiers)
        .flatMap(Set::stream)
        .filter(isAnnotationType(Uri.class).or(isAnnotationType(Mock.class)).or(isEqual(DEFAULT)))
        .findAny()
        .isPresent();
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
private <T> T newInstance(final Bean<T> bean, final ReleaseCallbackHandler handler) {
    final CreationalContextImpl<T> ctx = contextFor(bean, handler);
    final T instance = bean.create(ctx);
    ctx.addDependentInstance(new ContextualInstance<T>() {
        @Override
        public T getInstance() {
            return instance;
        }

        @Override
        public CreationalContext<T> getCreationalContext() {
            return ctx;
        }

        @Override
        public Contextual<T> getContextual() {
            return bean;
        }
    });
    return instance;
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
private <T> T unique(final Class clazz, final Collection<T> set) {
    if (set.isEmpty()) {
        final Set<Bean<?>> allBeans = container().beanDeploymentArchives().values().stream()
                .map(BeanManagerImpl::getBeans)
                .flatMap(Collection::stream)
                .collect(toSet());
        throw new TestEEfiException("No matching bean found for class "
                + clazz.getName()
                + ", available beans are: "
                + allBeans
        );
    } else if (set.size() > 1) {
        throw new TestEEfiException("Multiple ambiguous beans found for class " + clazz.getName());
    } else {
        return set.iterator().next();
    }
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
private <T> ProducerFactory<T> factory(final Object mock) {
    return new ProducerFactory<T>() {
        @Override
        public <T1> Producer<T1> createProducer(final Bean<T1> bean) {
            return new Producer<T1>() {

                @Override
                public T1 produce(final CreationalContext<T1> ctx) {
                    return (T1) mock;
                }

                @Override
                public void dispose(final T1 instance) {
                }

                @Override
                public Set<InjectionPoint> getInjectionPoints() {
                    return Collections.emptySet();
                }
            };
        }
    };
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
/**
 * Tests if exists observer injection in a jar archive
 */
@Test
public void testIfExists() {
	logger.info("starting if exists event test");
	// To test the IF_EXISTS Reception I need to inject the observer bean so
	// it will be instantiated and ready to use
	Set<Bean<?>> beans = beanManager.getBeans(IfExistsObserver.class);
	assertEquals(beans.size(), 1);
	@SuppressWarnings("unchecked")
	Bean<IfExistsObserver> bean = (Bean<IfExistsObserver>) beans.iterator().next();
	CreationalContext<IfExistsObserver> ctx = beanManager.createCreationalContext(bean);
	beanManager.getReference(bean, IfExistsObserver.class, ctx);
	Bill bill = fire();
	assertEquals("The id generation passes through the always and if_exists observers and it is incremented", 10,
			bill.getId());
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
@Test
public void testProducer() {
	logger.info("starting producer spi test");
	CDI<Object> cdi = current();
	BeanManager beanManager = cdi.select(BeanManager.class).get();

	AnnotatedField<? super AnotherFactory> field = this
			.<AnotherFactory, AnnotatedField<AnotherFactory>>getAnnotatedMember(AnotherFactory.class, "jessie",
					beanManager);
	Bean<AnotherFactory> declaringBean = cast(beanManager.resolve(beanManager.getBeans(AnotherFactory.class)));
	ProducerFactory<AnotherFactory> producerFactory = beanManager.getProducerFactory(field, declaringBean);
	Producer<Toy> producer = cast(producerFactory.createProducer(null));
	assertNotNull(producer);
	assertTrue(producer.getInjectionPoints().isEmpty());
	Toy jessie = producer.produce(beanManager.<Toy>createCreationalContext(null));
	assertEquals("Jessie", jessie.getName());
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
private <X> AnnotatedField<X> decorateContext(AnnotatedField<X> field) {
    final PersistenceContext persistenceContext = field.getAnnotation(PersistenceContext.class);
    final UniqueIdentifier identifier = UniqueIdentifierLitteral.random();

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

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

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

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
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.enterprise.inject.spi.Bean; //导入依赖的package包/类
/**
 * Retrieves the services that are available for use with the description for each service. 
 * The Services are determined by looking up all of the implementations of the 
 * Customer Service interface that are using the  DataService qualifier annotation. 
 * The DataService annotation contains the service name and description information. 
 * @return Map containing a list of services available and a description of each one.
 */
public Map<String,String> getServices (){
	TreeMap<String,String> services = new TreeMap<String,String>();
	logger.fine("Getting CustomerService Impls");
   	Set<Bean<?>> beans = beanManager.getBeans(CustomerService.class,new AnnotationLiteral<Any>() {
		private static final long serialVersionUID = 1L;});
   	for (Bean<?> bean : beans) {    		
   		for (Annotation qualifer: bean.getQualifiers()){
   			if(DataService.class.getName().equalsIgnoreCase(qualifer.annotationType().getName())){
   				DataService service = (DataService) qualifer;
   				logger.fine("   name="+service.name()+" description="+service.description());
   				services.put(service.name(), service.description());
   			}
   		}
   	}    	
   	return services;
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
@SuppressWarnings("unchecked")
@Override
public <T> List<T> getInstancesByType(Class<T> clazz) {
	BeanManager beanManager = getBeanManager();

	Type type = clazz;
	if (clazz == JsonApiExceptionMapper.class) {
		TypeLiteral<JsonApiExceptionMapper<?>> typeLiteral = new TypeLiteral<JsonApiExceptionMapper<?>>() {
		};
		type = typeLiteral.getType();
	}

	Set<Bean<?>> beans = beanManager.getBeans(type);
	List<T> list = new ArrayList<>();
	for (Bean<?> bean : beans) {
		CreationalContext<?> creationalContext = beanManager.createCreationalContext(bean);
		T object = (T) beanManager.getReference(bean, type, creationalContext);
		list.add(object);
	}
	return list;
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
@Override
public <A extends Annotation> List<Object> getInstancesByAnnotation(Class<A> annotationClass) {
	BeanManager beanManager = getBeanManager();
	Set<Bean<?>> beans = beanManager.getBeans(Object.class);
	List<Object> list = new ArrayList<>();
	for (Bean<?> bean : beans) {
		Class<?> beanClass = bean.getBeanClass();
		Optional<A> annotation = ClassUtils.getAnnotation(beanClass, annotationClass);
		if (annotation.isPresent()) {
			CreationalContext<?> creationalContext = beanManager.createCreationalContext(bean);
			Object object = beanManager.getReference(bean, beanClass, creationalContext);
			list.add(object);
		}
	}
	return list;
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
/**
 * 
 * @param ip
 * @param beanManager
 * @return
 */
private <T> Bean<T> createBeanAdapter(InjectionPoint ip, BeanManager beanManager) {
	final Type type = ip.getType();
	final Class<T> rawType = ReflectionUtils.getRawType(type);
	final ContextualLifecycle<T> lifecycleAdapter = new BodyLifecycle<T>(ip, beanManager);
	final BeanBuilder<T> beanBuilder = new BeanBuilder<T>(beanManager)
			.readFromType(new AnnotatedTypeBuilder<T>().readFromType(rawType).create())
			.beanClass(Body.class) // see https://issues.jboss.org/browse/WELD-2165
			.name(ip.getMember().getName())
			.qualifiers(ip.getQualifiers())
			.beanLifecycle(lifecycleAdapter)
			.scope(Dependent.class)
			.passivationCapable(false)
			.alternative(false)
			.nullable(true)
			.id("BodyBean#" + type.toString())
			.addType(type); //java.lang.Object needs to be present (as type) in any case
	return beanBuilder.create();
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
@Test
@SuppressWarnings({ "unchecked", "rawtypes" })
public void initialiseContexts() {
	final WebSocketContext webSocketContext = mock(WebSocketContext.class);
	ReflectionUtil.set(this.extension, "webSocketContext", webSocketContext);
	final AfterDeploymentValidation afterDeploymentValidation = mock(AfterDeploymentValidation.class);
	final Bean<?> bean = mock(Bean.class);
	when(this.beanManager.getBeans(WebSocketSessionHolder.class)).thenReturn(Collections.singleton(bean));
	when(this.beanManager.resolve(any(Set.class))).thenReturn(bean);
	final CreationalContext creationalContext = mock(CreationalContext.class);
	when(this.beanManager.createCreationalContext(bean)).thenReturn(creationalContext);
	final WebSocketSessionHolder webSocketSessionHolder = mock(WebSocketSessionHolder.class);
	when(this.beanManager.getReference(bean, WebSocketSessionHolder.class, creationalContext)).thenReturn(webSocketSessionHolder);

	this.extension.initialiseContexts(afterDeploymentValidation, this.beanManager);

	verify(this.beanManager).getBeans(WebSocketSessionHolder.class);
	verify(this.beanManager).resolve(any(Set.class));
	verify(this.beanManager).createCreationalContext(bean);
	verify(this.beanManager).getReference(bean, WebSocketSessionHolder.class, creationalContext);
	verify(webSocketContext).init(webSocketSessionHolder);
	verifyNoMoreInteractions(webSocketContext, afterDeploymentValidation, bean, creationalContext, webSocketSessionHolder);
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
@SuppressWarnings("unchecked")
public static <T> T getBean(Class<T> clazz) {
	BeanManager bm = getBeanManager();
	Set<Bean<?>> beans = bm.getBeans(clazz);

	if (beans == null || beans.isEmpty()) {
		return null;
	}

	Bean<T> bean = (Bean<T>) beans.iterator().next();

	CreationalContext<T> ctx = bm.createCreationalContext(bean);
	T o = (T) bm.getReference(bean, clazz, ctx);

	return o;
}
 

import javax.enterprise.inject.spi.Bean; //导入依赖的package包/类
/**
 * Perform the work we need to do at AfterProcessViewEvent time.
 *
 * @param event the event.
 */
public void afterProcessViewEvent(@Observes AfterProcessViewEvent event) {
    if (request.getAttribute(SCOPE_ID) != null) {
        String scopeId = (String) request.getAttribute(SCOPE_ID);
        HttpSession session = request.getSession();
        final String sessionKey = SCOPE_ID + "-" + scopeId;
        Map<String, Object> scopeMap = (Map<String, Object>) session.getAttribute(sessionKey);
        if (null != scopeMap) {
            scopeMap.entrySet().stream().forEach((entrySet) -> {
                String key = entrySet.getKey();
                Object value = entrySet.getValue();
                if (key.startsWith(INSTANCE)) {
                    BeanManager beanManager = CdiUtils.getApplicationBeanManager();
                    Bean<?> bean = beanManager.resolve(beanManager.getBeans(value.getClass()));
                    destroy(bean);
                }
            });
            scopeMap.clear();
            session.removeAttribute(sessionKey);
        }
    }
}