org.jboss.remoting.transport.async
Class AsyncClientInvoker

java.lang.Object
  org.jboss.remoting.AbstractInvoker
      org.jboss.remoting.RemoteClientInvoker
          org.jboss.remoting.transport.async.AsyncClientInvoker

All Implemented Interfaces:

ClientInvoker, Invoker

public class AsyncClientInvoker

extends RemoteClientInvoker

AsyncClientInvoker uses sockets to remotely connect to the a remote AsyncServerInvoker. Requests are sent asynchronously to allow more concurrent requests to be sent to the server while using fewer sockets. This is also known as the 'async' protocol. TODO: If you are running on Java 1.4, this transport transport will take advantage of the NIO classes to further reduce the resources used on the server.

Author:

Hiram Chirino

Field Summary

Fields inherited from class org.jboss.remoting.RemoteClientInvoker

connected

Fields inherited from class org.jboss.remoting.AbstractInvoker

classbyteloader, localServerLocator, locator, logExtra

Constructor Summary

AsyncClientInvoker(InvokerLocator locator)

Method Summary

protected void	finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
protected void	handleConnect() subclasses must implement this method to provide a hook to connect to the remote server, if this applies to the specific transport.
protected void	handleDisconnect() subclasses must implement this method to provide a hook to disconnect from the remote server, if this applies to the specific transport.
protected byte[]	transport(String sessionId, byte[] buffer) called to transport the marshalled invocation to the remote destination, and receive back the marshalled invocation bytes back.

Methods inherited from class org.jboss.remoting.RemoteClientInvoker

connect, disconnect, invoke, isConnected, postProcess, preProcess

Methods inherited from class org.jboss.remoting.AbstractInvoker

addClass, getClassBytes, getClientLocator, getLocator, loadClass, read, setClassLoader, setClientLocator, unmarshal

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jboss.remoting.transport.ClientInvoker

getClientLocator, setClientLocator

Methods inherited from interface org.jboss.remoting.Invoker

getLocator

Constructor Detail

AsyncClientInvoker

public AsyncClientInvoker(InvokerLocator locator)

Parameters:

locator -

Method Detail

handleConnect

protected void handleConnect()
                      throws ConnectionFailedException

Description copied from class: RemoteClientInvoker

subclasses must implement this method to provide a hook to connect to the remote server, if this applies to the specific transport. However, in some transport implementations, this may not make must difference since the connection is not persistent among invocations, such as SOAP. In these cases, the method should silently return without any processing.

Specified by:

handleConnect in class RemoteClientInvoker

Throws:

ConnectionFailedException

handleDisconnect

protected void handleDisconnect()

Description copied from class: RemoteClientInvoker

subclasses must implement this method to provide a hook to disconnect from the remote server, if this applies to the specific transport. However, in some transport implementations, this may not make must difference since the connection is not persistent among invocations, such as SOAP. In these cases, the method should silently return without any processing.

Specified by:

handleDisconnect in class RemoteClientInvoker

finalize

protected void finalize()
                 throws Throwable

Description copied from class: RemoteClientInvoker

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. A subclass overrides the finalize method to dispose of system resources or to perform other cleanup.

The general contract of finalize is that it is invoked if and when the Java^TM virtual machine has determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, except as a result of an action taken by the finalization of some other object or class which is ready to be finalized. The finalize method may take any action, including making this object available again to other threads; the usual purpose of finalize, however, is to perform cleanup actions before the object is irrevocably discarded. For example, the finalize method for an object that represents an input/output connection might perform explicit I/O transactions to break the connection before the object is permanently discarded.

The finalize method of class Object performs no special action; it simply returns normally. Subclasses of Object may override this definition.

The Java programming language does not guarantee which thread will transport the finalize method for any given object. It is guaranteed, however, that the thread that invokes finalize will not be holding any user-visible synchronization locks when finalize is invoked. If an uncaught exception is thrown by the finalize method, the exception is ignored and finalization of that object terminates.

After the finalize method has been invoked for an object, no further action is taken until the Java virtual machine has again determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, including possible actions by other objects or classes which are ready to be finalized, at which point the object may be discarded.

The finalize method is never invoked more than once by a Java virtual machine for any given object.

Any exception thrown by the finalize method causes the finalization of this object to be halted, but is otherwise ignored.

Overrides:

finalize in class RemoteClientInvoker

Throws:

Throwable - the Exception raised by this method

transport

protected byte[] transport(String sessionId,
                           byte[] buffer)
                    throws IOException,
                           ConnectionFailedException

Description copied from class: RemoteClientInvoker

called to transport the marshalled invocation to the remote destination, and receive back the marshalled invocation bytes back. this method allows the subclass to provide the specific mechanism, protocol, etc. for delivering and returning remote invocations in a transport-specific way.

Specified by:

transport in class RemoteClientInvoker

Parameters:

sessionId - session id to pass along

buffer - buffer of the serialized method invocation to send to the server

Returns:

result of the method invocation as serialized bytes

Throws:

IOException - fatal exception should only be raised in the case the transport write fails (but is still a valid connection)

ConnectionFailedException - this exception is raised in the case the remote side is no longer available