Ice.DispatchInterceptor Maven / Gradle / Ivy
Show all versions of ice Show documentation
// **********************************************************************
//
// Copyright (c) 2003-2017 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
package Ice;
/**
* Base class that allows a server intercept incoming requests.
* The application must derive a concrete class from DispatchInterceptor
* that implements the {@link DispatchInterceptor#dispatch} operation. An instance of this derived
* class can be registered with an object adapter like any other servant.
*
* A dispatch interceptor is useful particularly to automatically retry requests
* that have failed due to a recoverable error condition.
**/
public abstract class DispatchInterceptor extends ObjectImpl
{
/**
* Called by the Ice run time to dispatch an incoming request. The implementation
* of dispatch must dispatch the request to the actual servant.
*
* @param request The details of the incoming request.
* @return For synchronous dispatch, the return value must be whatever is
* returned {@link #ice_dispatch}. For asynchronous dispatch, the return
* value must be DispatchAsync.
*
* @see Request
* @see DispatchStatus
**/
public abstract DispatchStatus
dispatch(Request request);
@Override
public DispatchStatus
__dispatch(IceInternal.Incoming in, Current current)
{
try
{
DispatchStatus status = dispatch(in);
if(status != DispatchStatus.DispatchAsync)
{
//
// Make sure 'in' owns the connection etc.
//
in.killAsync();
}
return status;
}
catch(ResponseSentException e)
{
return DispatchStatus.DispatchAsync;
}
catch(java.lang.RuntimeException e)
{
try
{
in.killAsync();
throw e;
}
catch(ResponseSentException rse)
{
return DispatchStatus.DispatchAsync;
}
}
}
}