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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.ejb.access 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.springframework.ejb.access.AbstractSlsbInvokerInterceptor
   org.springframework.ejb.access.AbstractRemoteSlsbInvokerInterceptor

All known Subclasses:   org.springframework.ejb.access.SimpleRemoteSlsbInvokerInterceptor,
AbstractRemoteSlsbInvokerInterceptor
abstract public class AbstractRemoteSlsbInvokerInterceptor extends AbstractSlsbInvokerInterceptor (Code)
Superclass for interceptors proxying remote Stateless Session Beans.

Such an interceptor must be the last interceptor in the advice chain. In this case, there is no target object.
author:
   Rod Johnson
author:
   Juergen Hoeller





Method Summary
abstract protected  ObjectdoInvoke(MethodInvocation invocation)
     Perform the given invocation on the current EJB home.
public  Objectinvoke(MethodInvocation invocation)
     Fetches an EJB home object and delegates to doInvoke.
protected  booleanisConnectFailure(RemoteException ex)
     Determine whether the given RMI exception indicates a connect failure.
protected  booleanisHomeRefreshable()
    
protected  Objectlookup()
     This overridden lookup implementation performs a narrow operation after the JNDI lookup, provided that a home interface is specified.
protected  EJBObjectnewSessionBeanInstance()
     Return a new instance of the stateless session bean.
protected  ObjectrefreshAndRetry(MethodInvocation invocation)
     Refresh the EJB home object and retry the given invocation.
protected  voidremoveSessionBeanInstance(EJBObject ejb)
     Remove the given EJB instance.
public  voidsetHomeInterface(Class homeInterface)
     Set a home interface that this invoker will narrow to before performing the parameterless SLSB create() call that returns the actual SLSB proxy.

Default is none, which will work on all J2EE servers that are not based on CORBA.

public  voidsetRefreshHomeOnConnectFailure(boolean refreshHomeOnConnectFailure)
     Set whether to refresh the EJB home on connect failure.



Method Detail
doInvoke
abstract protected Object doInvoke(MethodInvocation invocation) throws Throwable(Code)
Perform the given invocation on the current EJB home. Template method to be implemented by a subclass.
Parameters:
  invocation - the AOP method invocation the invocation result, if any
throws:
  Throwable - in case of invocation failure
See Also:   AbstractRemoteSlsbInvokerInterceptor.getHome
See Also:   AbstractRemoteSlsbInvokerInterceptor.newSessionBeanInstance



invoke
public Object invoke(MethodInvocation invocation) throws Throwable(Code)
Fetches an EJB home object and delegates to doInvoke. If configured to refresh on connect failure, it will call refreshAndRetry on corresponding RMI exceptions.
See Also:   AbstractRemoteSlsbInvokerInterceptor.getHome
See Also:   AbstractRemoteSlsbInvokerInterceptor.doInvoke
See Also:   AbstractRemoteSlsbInvokerInterceptor.refreshAndRetry
See Also:   java.rmi.ConnectException
See Also:   java.rmi.ConnectIOException
See Also:   java.rmi.NoSuchObjectException



isConnectFailure
protected boolean isConnectFailure(RemoteException ex)(Code)
Determine whether the given RMI exception indicates a connect failure. Default implementation delegates to RmiClientInterceptorUtils.
Parameters:
  ex - the RMI exception to check whether the exception should be treated as connect failure
See Also:   org.springframework.remoting.rmi.RmiClientInterceptorUtils.isConnectFailure



isHomeRefreshable
protected boolean isHomeRefreshable()(Code)



lookup
protected Object lookup() throws NamingException(Code)
This overridden lookup implementation performs a narrow operation after the JNDI lookup, provided that a home interface is specified.
See Also:   AbstractRemoteSlsbInvokerInterceptor.setHomeInterface
See Also:   javax.rmi.PortableRemoteObject.narrow



newSessionBeanInstance
protected EJBObject newSessionBeanInstance() throws NamingException, InvocationTargetException(Code)
Return a new instance of the stateless session bean. To be invoked by concrete remote SLSB invoker subclasses.

Can be overridden to change the algorithm.
throws:
  NamingException - if thrown by JNDI
throws:
  InvocationTargetException - if thrown by the create method
See Also:   AbstractRemoteSlsbInvokerInterceptor.create




refreshAndRetry
protected Object refreshAndRetry(MethodInvocation invocation) throws Throwable(Code)
Refresh the EJB home object and retry the given invocation. Called by invoke on connect failure.
Parameters:
  invocation - the AOP method invocation the invocation result, if any
throws:
  Throwable - in case of invocation failure
See Also:   AbstractRemoteSlsbInvokerInterceptor.invoke



removeSessionBeanInstance
protected void removeSessionBeanInstance(EJBObject ejb)(Code)
Remove the given EJB instance. To be invoked by concrete remote SLSB invoker subclasses.
Parameters:
  ejb - the EJB instance to remove
See Also:   javax.ejb.EJBObject.remove



setHomeInterface
public void setHomeInterface(Class homeInterface)(Code)
Set a home interface that this invoker will narrow to before performing the parameterless SLSB create() call that returns the actual SLSB proxy.

Default is none, which will work on all J2EE servers that are not based on CORBA. A plain javax.ejb.EJBHome interface is known to be sufficient to make a WebSphere 5.0 Remote SLSB work. On other servers, the specific home interface for the target SLSB might be necessary.




setRefreshHomeOnConnectFailure
public void setRefreshHomeOnConnectFailure(boolean refreshHomeOnConnectFailure)(Code)
Set whether to refresh the EJB home on connect failure. Default is "false".

Can be turned on to allow for hot restart of the EJB server. If a cached EJB home throws an RMI exception that indicates a remote connect failure, a fresh home will be fetched and the invocation will be retried.
See Also:   java.rmi.ConnectException
See Also:   java.rmi.ConnectIOException
See Also:   java.rmi.NoSuchObjectException




Methods inherited from org.springframework.ejb.access.AbstractSlsbInvokerInterceptor
public void afterPropertiesSet() throws NamingException(Code)(Java Doc)
protected Object create() throws NamingException, InvocationTargetException(Code)(Java Doc)
protected Method getCreateMethod(Object home) throws EjbAccessException(Code)(Java Doc)
protected Object getHome() throws NamingException(Code)(Java Doc)
protected boolean isHomeRefreshable()(Code)(Java Doc)
protected void refreshHome() throws NamingException(Code)(Java Doc)
public void setCacheHome(boolean cacheHome)(Code)(Java Doc)
public void setLookupHomeOnStartup(boolean lookupHomeOnStartup)(Code)(Java Doc)

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