001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020package org.apache.mina.util; 021 022import java.io.Serializable; 023import java.util.Collection; 024import java.util.Iterator; 025import java.util.Queue; 026 027/** 028 * A decorator that makes the specified {@link Queue} thread-safe. 029 * Like any other synchronizing wrappers, iteration is not thread-safe. 030 * 031 * @author <a href="http://mina.apache.org">Apache MINA Project</a> 032 */ 033public class SynchronizedQueue<E> implements Queue<E>, Serializable { 034 035 private static final long serialVersionUID = -1439242290701194806L; 036 037 private final Queue<E> q; 038 039 public SynchronizedQueue(Queue<E> q) { 040 this.q = q; 041 } 042 043 public synchronized boolean add(E e) { 044 return q.add(e); 045 } 046 047 public synchronized E element() { 048 return q.element(); 049 } 050 051 public synchronized boolean offer(E e) { 052 return q.offer(e); 053 } 054 055 public synchronized E peek() { 056 return q.peek(); 057 } 058 059 public synchronized E poll() { 060 return q.poll(); 061 } 062 063 public synchronized E remove() { 064 return q.remove(); 065 } 066 067 public synchronized boolean addAll(Collection<? extends E> c) { 068 return q.addAll(c); 069 } 070 071 public synchronized void clear() { 072 q.clear(); 073 } 074 075 public synchronized boolean contains(Object o) { 076 return q.contains(o); 077 } 078 079 public synchronized boolean containsAll(Collection<?> c) { 080 return q.containsAll(c); 081 } 082 083 public synchronized boolean isEmpty() { 084 return q.isEmpty(); 085 } 086 087 public synchronized Iterator<E> iterator() { 088 return q.iterator(); 089 } 090 091 public synchronized boolean remove(Object o) { 092 return q.remove(o); 093 } 094 095 public synchronized boolean removeAll(Collection<?> c) { 096 return q.removeAll(c); 097 } 098 099 public synchronized boolean retainAll(Collection<?> c) { 100 return q.retainAll(c); 101 } 102 103 public synchronized int size() { 104 return q.size(); 105 } 106 107 public synchronized Object[] toArray() { 108 return q.toArray(); 109 } 110 111 public synchronized <T> T[] toArray(T[] a) { 112 return q.toArray(a); 113 } 114 115 @Override 116 public synchronized boolean equals(Object obj) { 117 return q.equals(obj); 118 } 119 120 @Override 121 public synchronized int hashCode() { 122 return q.hashCode(); 123 } 124 125 @Override 126 public synchronized String toString() { 127 return q.toString(); 128 } 129}