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 * 024 * 025 */ 026public class ResponseHolder { 027 protected Response response; 028 protected Object lock = new Object(); 029 protected boolean notified; 030 031 /** 032 * Construct a receipt holder 033 */ 034 public ResponseHolder() { 035 } 036 037 /** 038 * Set the Response for this holder 039 * 040 * @param r 041 */ 042 public void setResponse(Response r) { 043 synchronized (lock) { 044 this.response = r; 045 notified = true; 046 lock.notify(); 047 } 048 } 049 050 /** 051 * Get the Response 052 * 053 * @return the Response or null if it is closed 054 */ 055 public Response getResponse() { 056 return getResponse(0); 057 } 058 059 /** 060 * wait upto <Code>timeout</Code> timeout ms to get a receipt 061 * 062 * @param timeout 063 * @return 064 */ 065 public Response getResponse(int timeout) { 066 synchronized (lock) { 067 if (!notified) { 068 try { 069 lock.wait(timeout); 070 } catch (InterruptedException e) { 071 Thread.currentThread().interrupt(); 072 } 073 } 074 } 075 return this.response; 076 } 077 078 /** 079 * close this holder 080 */ 081 public void close() { 082 synchronized (lock) { 083 notified = true; 084 lock.notifyAll(); 085 } 086 } 087}