001 /**
002 *
003 * Copyright 2004 Protique Ltd
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * 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 **/
018 package org.activemq.message;
019
020 /**
021 * ReceiptHolder is a utility class used for waiting for receipts from Packets sent to the broker
022 *
023 * @version $Revision: 1.1.1.1 $
024 */
025 public class ReceiptHolder {
026 protected Receipt receipt;
027 protected Object lock = new Object();
028 protected boolean notified;
029
030 /**
031 * Construct a receipt holder
032 */
033 public ReceiptHolder() {
034 }
035
036 /**
037 * Set the Receipt for this holder
038 *
039 * @param r
040 */
041 public void setReceipt(Receipt r) {
042 synchronized (lock) {
043 this.receipt = r;
044 notified = true;
045 lock.notify();
046 }
047 }
048
049 /**
050 * Get the Receipt
051 *
052 * @return the Receipt or null if it is closed
053 */
054 public Receipt getReceipt() {
055 return getReceipt(0);
056 }
057
058 /**
059 * wait upto <Code>timeout</Code> timeout ms to get a receipt
060 *
061 * @param timeout
062 * @return
063 */
064 public Receipt getReceipt(int timeout) {
065 synchronized (lock) {
066 if (!notified) {
067 try {
068 lock.wait(timeout);
069 }
070 catch (InterruptedException e) {
071 e.printStackTrace();
072 }
073 }
074 }
075 return this.receipt;
076 }
077
078 /**
079 * close this holder
080 */
081 public void close() {
082 synchronized (lock) {
083 notified = true;
084 lock.notifyAll();
085 }
086 }
087 }