001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.activemq.transport; 018 019 import java.io.IOException; 020 import java.io.InterruptedIOException; 021 import java.util.concurrent.ArrayBlockingQueue; 022 import java.util.concurrent.TimeUnit; 023 024 import org.apache.activemq.command.Response; 025 import org.slf4j.Logger; 026 import org.slf4j.LoggerFactory; 027 028 public class FutureResponse { 029 private static final Logger LOG = LoggerFactory.getLogger(FutureResponse.class); 030 031 private final ResponseCallback responseCallback; 032 private final ArrayBlockingQueue<Response> responseSlot = new ArrayBlockingQueue<Response>(1); 033 034 public FutureResponse(ResponseCallback responseCallback) { 035 this.responseCallback = responseCallback; 036 } 037 038 public Response getResult() throws IOException { 039 try { 040 return responseSlot.take(); 041 } catch (InterruptedException e) { 042 Thread.currentThread().interrupt(); 043 if (LOG.isDebugEnabled()) { 044 LOG.debug("Operation interupted: " + e, e); 045 } 046 throw new InterruptedIOException("Interrupted."); 047 } 048 } 049 050 public Response getResult(int timeout) throws IOException { 051 try { 052 Response result = responseSlot.poll(timeout, TimeUnit.MILLISECONDS); 053 if (result == null && timeout > 0) { 054 throw new RequestTimedOutIOException(); 055 } 056 return result; 057 } catch (InterruptedException e) { 058 throw new InterruptedIOException("Interrupted."); 059 } 060 } 061 062 public void set(Response result) { 063 if (responseSlot.offer(result)) { 064 if (responseCallback != null) { 065 responseCallback.onCompletion(this); 066 } 067 } 068 } 069 }