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 */ 017package org.apache.activemq.transport.tcp; 018 019import org.apache.activemq.command.Response; 020 021/** 022 * ResponseHolder utility 023 */ 024public class ResponseHolder { 025 protected Response response; 026 protected Object lock = new Object(); 027 protected boolean notified; 028 029 /** 030 * Construct a receipt holder 031 */ 032 public ResponseHolder() { 033 } 034 035 /** 036 * Set the Response for this holder 037 * 038 * @param response 039 * the response returned from the remote peer. 040 */ 041 public void setResponse(Response r) { 042 synchronized (lock) { 043 this.response = r; 044 notified = true; 045 lock.notify(); 046 } 047 } 048 049 /** 050 * Get the Response 051 * 052 * @return the Response or null if it is closed 053 */ 054 public Response getResponse() { 055 return getResponse(0); 056 } 057 058 /** 059 * wait up to <Code>timeout</Code> timeout milliseconds to get a receipt 060 * 061 * @param timeout 062 * @return the Response that was set or null if none set yet. 063 */ 064 public Response getResponse(int timeout) { 065 synchronized (lock) { 066 if (!notified) { 067 try { 068 lock.wait(timeout); 069 } catch (InterruptedException e) { 070 Thread.currentThread().interrupt(); 071 } 072 } 073 } 074 return this.response; 075 } 076 077 /** 078 * close this holder 079 */ 080 public void close() { 081 synchronized (lock) { 082 notified = true; 083 lock.notifyAll(); 084 } 085 } 086}