org.apache.dubbo.config.spring

类 ReferenceBean<T>

java.lang.Object

org.apache.dubbo.config.spring.ReferenceBean<T>

所有已实现的接口:

org.springframework.beans.factory.Aware, org.springframework.beans.factory.BeanClassLoaderAware, org.springframework.beans.factory.BeanNameAware, org.springframework.beans.factory.DisposableBean, org.springframework.beans.factory.FactoryBean<T>, org.springframework.beans.factory.InitializingBean, org.springframework.context.ApplicationContextAware

public class ReferenceBean<T>
extends Object
implements org.springframework.beans.factory.FactoryBean<T>, org.springframework.context.ApplicationContextAware, org.springframework.beans.factory.BeanClassLoaderAware, org.springframework.beans.factory.BeanNameAware, org.springframework.beans.factory.InitializingBean, org.springframework.beans.factory.DisposableBean

Spring FactoryBean for ReferenceConfig.

Step 1: Register ReferenceBean in Java-config class:

 @Configuration
 public class ReferenceConfiguration {
     @Bean
     @DubboReference(group = "demo")
     public ReferenceBean<HelloService> helloService() {
         return new ReferenceBean();
     }

     // As GenericService
     @Bean
     @DubboReference(group = "demo", interfaceClass = HelloService.class)
     public ReferenceBean<GenericService> genericHelloService() {
         return new ReferenceBean();
     }
 }
 

Or register ReferenceBean in xml:

 <dubbo:reference id="helloService" interface="org.apache.dubbo.config.spring.api.HelloService"/>
 <!-- As GenericService -->
 <dubbo:reference id="genericHelloService" interface="org.apache.dubbo.config.spring.api.HelloService" generic="true"/>
 

Step 2: Inject ReferenceBean by @Autowired

 public class FooController {
     @Autowired
     private HelloService helloService;

     @Autowired
     private GenericService genericHelloService;
 }
 

另请参阅:

DubboReference, ReferenceBeanBuilder

字段概要

从接口继承的字段 org.springframework.beans.factory.FactoryBean

OBJECT_TYPE_ATTRIBUTE

构造器概要

构造器

构造器和说明
ReferenceBean()
ReferenceBean(Map<String,Object> referenceProps)

方法概要

限定符和类型	方法和说明
void	afterPropertiesSet()
void	destroy()
String	getGroup() The group of the service
String	getId()
Class<?>	getInterfaceClass() The interface of this ReferenceBean, for injection purpose
String	getKey()
T	getObject() Create bean instance.
Class<?>	getObjectType()
org.springframework.beans.MutablePropertyValues	getPropertyValues()
ReferenceConfig	getReferenceConfig()
Map<String,Object>	getReferenceProps()
String	getServiceInterface() The interface of remote service
String	getVersion() The version of the service
boolean	isSingleton()
void	setApplicationContext(org.springframework.context.ApplicationContext applicationContext)
void	setBeanClassLoader(ClassLoader classLoader)
void	setBeanName(String name)
void	setId(String id)
void	setKeyAndReferenceConfig(String key, ReferenceConfig referenceConfig)

从类继承的方法 java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

ReferenceBean

public ReferenceBean()

ReferenceBean

public ReferenceBean(Map<String,Object> referenceProps)

方法详细资料

setApplicationContext

public void setApplicationContext(org.springframework.context.ApplicationContext applicationContext)

指定者:

setApplicationContext 在接口中 org.springframework.context.ApplicationContextAware

setBeanClassLoader

public void setBeanClassLoader(ClassLoader classLoader)

指定者:

setBeanClassLoader 在接口中 org.springframework.beans.factory.BeanClassLoaderAware

setBeanName

public void setBeanName(String name)

指定者:

setBeanName 在接口中 org.springframework.beans.factory.BeanNameAware

getObject

public T getObject()

Create bean instance.

Why we need a lazy proxy?

When Spring searches beans by type, if Spring cannot determine the type of a factory bean, it may try to initialize it. The ReferenceBean is also a FactoryBean.
(This has already been resolved by decorating the BeanDefinition: DubboBeanDefinitionParser.configReferenceBean(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext, org.springframework.beans.factory.support.RootBeanDefinition, org.springframework.beans.factory.config.BeanDefinition))

In addition, if some ReferenceBeans are dependent on beans that are initialized very early, and dubbo config beans are not ready yet, there will be many unexpected problems if initializing the dubbo reference immediately.

When it is initialized, only a lazy proxy object will be created, and dubbo reference-related resources will not be initialized.
In this way, the influence of Spring is eliminated, and the dubbo configuration initialization is controllable.

指定者:

getObject 在接口中 org.springframework.beans.factory.FactoryBean<T>

另请参阅:

DubboConfigBeanInitializer, ReferenceBeanManager.initReferenceBean(ReferenceBean), DubboBeanDefinitionParser.configReferenceBean(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext, org.springframework.beans.factory.support.RootBeanDefinition, org.springframework.beans.factory.config.BeanDefinition)

getObjectType

public Class<?> getObjectType()

指定者:

getObjectType 在接口中 org.springframework.beans.factory.FactoryBean<T>

isSingleton

@Parameter(excluded=true)
public boolean isSingleton()

指定者:

isSingleton 在接口中 org.springframework.beans.factory.FactoryBean<T>

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

指定者:

afterPropertiesSet 在接口中 org.springframework.beans.factory.InitializingBean

抛出:

Exception

destroy

public void destroy()

指定者:

destroy 在接口中 org.springframework.beans.factory.DisposableBean

getId

public String getId()

setId

public void setId(String id)

getInterfaceClass

public Class<?> getInterfaceClass()

The interface of this ReferenceBean, for injection purpose

返回:

getServiceInterface

public String getServiceInterface()

The interface of remote service

getGroup

public String getGroup()

The group of the service

getVersion

public String getVersion()

The version of the service

getKey

public String getKey()

getReferenceProps

public Map<String,Object> getReferenceProps()

getPropertyValues

public org.springframework.beans.MutablePropertyValues getPropertyValues()

getReferenceConfig

public ReferenceConfig getReferenceConfig()

setKeyAndReferenceConfig

public void setKeyAndReferenceConfig(String key,
                                     ReferenceConfig referenceConfig)