Class HttpInvokerProxyFactoryBean

  extended by
      extended by
          extended by
              extended by
                  extended by org.springframework.remoting.httpinvoker.HttpInvokerClientInterceptor
                      extended by org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean
All Implemented Interfaces:
Advice, Interceptor, MethodInterceptor, BeanClassLoaderAware, FactoryBean, InitializingBean, HttpInvokerClientConfiguration

public class HttpInvokerProxyFactoryBean
extends HttpInvokerClientInterceptor
implements FactoryBean

FactoryBean for HTTP invoker proxies. Exposes the proxied service for use as a bean reference, using the specified service interface.

The service URL must be an HTTP URL exposing an HTTP invoker service. Optionally, a codebase URL can be specified for on-demand dynamic code download from a remote location. For details, see HttpInvokerClientInterceptor docs.

Serializes remote invocation objects and deserializes remote invocation result objects. Uses Java serialization just like RMI, but provides the same ease of setup as Caucho's HTTP-based Hessian and Burlap protocols.

HTTP invoker is the recommended protocol for Java-to-Java remoting. It is more powerful and more extensible than Hessian and Burlap, at the expense of being tied to Java. Nevertheless, it is as easy to set up as Hessian and Burlap, which is its main advantage compared to RMI.

Juergen Hoeller
See Also:
RemoteAccessor.setServiceInterface(java.lang.Class), UrlBasedRemoteAccessor.setServiceUrl(java.lang.String), HttpInvokerClientInterceptor.setCodebaseUrl(java.lang.String), HttpInvokerClientInterceptor, HttpInvokerServiceExporter, RmiProxyFactoryBean, HessianProxyFactoryBean, BurlapProxyFactoryBean

Field Summary
Fields inherited from class
Constructor Summary
Method Summary
 void afterPropertiesSet()
          Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
 Object getObject()
          Return an instance (possibly shared or independent) of the object managed by this factory.
 Class getObjectType()
          Return the type of object that this FactoryBean creates, or null if not known in advance.
 boolean isSingleton()
          Is the object managed by this factory a singleton?
Methods inherited from class org.springframework.remoting.httpinvoker.HttpInvokerClientInterceptor
convertHttpInvokerAccessException, executeRequest, executeRequest, getCodebaseUrl, getHttpInvokerRequestExecutor, invoke, setCodebaseUrl, setHttpInvokerRequestExecutor
Methods inherited from class
createRemoteInvocation, getRemoteInvocationFactory, recreateRemoteInvocationResult, setRemoteInvocationFactory
Methods inherited from class
getServiceUrl, setServiceUrl
Methods inherited from class
getServiceInterface, setServiceInterface
Methods inherited from class
getBeanClassLoader, overrideThreadContextClassLoader, resetThreadContextClassLoader, setBeanClassLoader
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.springframework.remoting.httpinvoker.HttpInvokerClientConfiguration

Constructor Detail


public HttpInvokerProxyFactoryBean()
Method Detail


public void afterPropertiesSet()
Description copied from interface: InitializingBean
Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).

This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.

Specified by:
afterPropertiesSet in interface InitializingBean
afterPropertiesSet in class HttpInvokerClientInterceptor


public Object getObject()
Description copied from interface: FactoryBean
Return an instance (possibly shared or independent) of the object managed by this factory.

As with a BeanFactory, this allows support for both the Singleton and Prototype design pattern.

If this FactoryBean is not fully initialized yet at the time of the call (for example because it is involved in a circular reference), throw a corresponding FactoryBeanNotInitializedException.

As of Spring 2.0, FactoryBeans are allowed to return null objects. The factory will consider this as normal value to be used; it will not throw a FactoryBeanNotInitializedException in this case anymore. FactoryBean implementations are encouraged to throw FactoryBeanNotInitializedException themselves now, as appropriate.

Specified by:
getObject in interface FactoryBean
an instance of the bean (can be null)
See Also:


public Class getObjectType()
Description copied from interface: FactoryBean
Return the type of object that this FactoryBean creates, or null if not known in advance.

This allows one to check for specific types of beans without instantiating objects, for example on autowiring.

In the case of implementations that are creating a singleton object, this method should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too.

This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available.

NOTE: Autowiring will simply ignore FactoryBeans that return null here. Therefore it is highly recommended to implement this method properly, using the current state of the FactoryBean.

Specified by:
getObjectType in interface FactoryBean
the type of object that this FactoryBean creates, or null if not known at the time of the call
See Also:


public boolean isSingleton()
Description copied from interface: FactoryBean
Is the object managed by this factory a singleton? That is, will FactoryBean.getObject() always return the same object (a reference that can be cached)?

NOTE: If a FactoryBean indicates to hold a singleton object, the object returned from getObject() might get cached by the owning BeanFactory. Hence, do not return true unless the FactoryBean always exposes the same reference.

The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.

NOTE: This method returning false does not necessarily indicate that returned objects are independent instances. An implementation of the extended SmartFactoryBean interface may explicitly indicate independent instances through its SmartFactoryBean.isPrototype() method. Plain FactoryBean implementations which do not implement this extended interface are simply assumed to always return independent instances if the isSingleton() implementation returns false.

Specified by:
isSingleton in interface FactoryBean
whether the exposed object is a singleton
See Also:
FactoryBean.getObject(), SmartFactoryBean.isPrototype()

Copyright © 2002-2008 The Spring Framework.