public class HttpInvokerProxyFactoryBean extends HttpInvokerClientInterceptor implements FactoryBean<Object>
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 protocol.
HTTP invoker is the recommended protocol for Java-to-Java remoting. It is more powerful and more extensible than Hessian, at the expense of being tied to Java. Nevertheless, it is as easy to set up as Hessian, which is its main advantage compared to RMI.
WARNING: Be aware of vulnerabilities due to unsafe Java deserialization: Manipulated input streams could lead to unwanted code execution on the server during the deserialization step. As a consequence, do not expose HTTP invoker endpoints to untrusted clients but rather just between your own services. In general, we strongly recommend any other message format (e.g. JSON) instead.
RemoteAccessor.setServiceInterface(java.lang.Class<?>)
,
UrlBasedRemoteAccessor.setServiceUrl(java.lang.String)
,
HttpInvokerClientInterceptor.setCodebaseUrl(java.lang.String)
,
HttpInvokerClientInterceptor
,
HttpInvokerServiceExporter
,
RmiProxyFactoryBean
,
HessianProxyFactoryBean
logger
OBJECT_TYPE_ATTRIBUTE
Constructor and Description |
---|
HttpInvokerProxyFactoryBean() |
Modifier and Type | Method and Description |
---|---|
void |
afterPropertiesSet()
Invoked by the containing
BeanFactory after it has set all bean properties
and satisfied BeanFactoryAware , ApplicationContextAware etc. |
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? That is,
will
FactoryBean.getObject() always return the same object
(a reference that can be cached)? |
convertHttpInvokerAccessException, executeRequest, executeRequest, getCodebaseUrl, getHttpInvokerRequestExecutor, invoke, setCodebaseUrl, setHttpInvokerRequestExecutor
createRemoteInvocation, getRemoteInvocationFactory, recreateRemoteInvocationResult, setRemoteInvocationFactory
getServiceUrl, setServiceUrl
getServiceInterface, setServiceInterface
getBeanClassLoader, overrideThreadContextClassLoader, resetThreadContextClassLoader, setBeanClassLoader
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
getServiceUrl
public void afterPropertiesSet()
InitializingBean
BeanFactory
after it has set all bean properties
and satisfied BeanFactoryAware
, ApplicationContextAware
etc.
This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set.
afterPropertiesSet
in interface InitializingBean
afterPropertiesSet
in class HttpInvokerClientInterceptor
@Nullable public Object getObject()
FactoryBean
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.
getObject
in interface FactoryBean<Object>
null
)FactoryBeanNotInitializedException
public Class<?> getObjectType()
FactoryBean
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.
getObjectType
in interface FactoryBean<Object>
null
if not known at the time of the callListableBeanFactory.getBeansOfType(java.lang.Class<T>)
public boolean isSingleton()
FactoryBean
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
.
The default implementation returns true
, since a
FactoryBean
typically manages a singleton instance.
isSingleton
in interface FactoryBean<Object>
FactoryBean.getObject()
,
SmartFactoryBean.isPrototype()