Tue, 06 Mar 2012 16:09:35 -0800
7150322: Stop using drop source bundles in jaxws
Reviewed-by: darcy, ohrstrom
ohair@286 | 1 | /* |
ohair@286 | 2 | * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
ohair@286 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
ohair@286 | 4 | * |
ohair@286 | 5 | * This code is free software; you can redistribute it and/or modify it |
ohair@286 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ohair@286 | 7 | * published by the Free Software Foundation. Oracle designates this |
ohair@286 | 8 | * particular file as subject to the "Classpath" exception as provided |
ohair@286 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
ohair@286 | 10 | * |
ohair@286 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
ohair@286 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
ohair@286 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
ohair@286 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
ohair@286 | 15 | * accompanied this code). |
ohair@286 | 16 | * |
ohair@286 | 17 | * You should have received a copy of the GNU General Public License version |
ohair@286 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
ohair@286 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
ohair@286 | 20 | * |
ohair@286 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
ohair@286 | 22 | * or visit www.oracle.com if you need additional information or have any |
ohair@286 | 23 | * questions. |
ohair@286 | 24 | */ |
ohair@286 | 25 | |
ohair@286 | 26 | package com.sun.xml.internal.ws.util; |
ohair@286 | 27 | |
ohair@286 | 28 | import com.sun.xml.internal.ws.api.pipe.Tube; |
ohair@286 | 29 | import com.sun.xml.internal.ws.api.pipe.TubeCloner; |
ohair@286 | 30 | |
ohair@286 | 31 | import javax.xml.bind.JAXBContext; |
ohair@286 | 32 | import javax.xml.bind.JAXBException; |
ohair@286 | 33 | import java.util.concurrent.ConcurrentLinkedQueue; |
ohair@286 | 34 | import java.lang.ref.WeakReference; |
ohair@286 | 35 | |
ohair@286 | 36 | /** |
ohair@286 | 37 | * General-purpose object pool. |
ohair@286 | 38 | * |
ohair@286 | 39 | * <p> |
ohair@286 | 40 | * In many parts of the runtime, we need to pool instances of objects that |
ohair@286 | 41 | * are expensive to create (such as JAXB objects, StAX parsers, {@link Tube} instances.) |
ohair@286 | 42 | * |
ohair@286 | 43 | * <p> |
ohair@286 | 44 | * This class provides a default implementation of such a pool. |
ohair@286 | 45 | * |
ohair@286 | 46 | * TODO: improve the implementation |
ohair@286 | 47 | * |
ohair@286 | 48 | * @author Kohsuke Kawaguchi |
ohair@286 | 49 | */ |
ohair@286 | 50 | public abstract class Pool<T> { |
ohair@286 | 51 | |
ohair@286 | 52 | // volatile since multiple threads may access queue reference |
ohair@286 | 53 | private volatile WeakReference<ConcurrentLinkedQueue<T>> queue; |
ohair@286 | 54 | |
ohair@286 | 55 | /** |
ohair@286 | 56 | * Gets a new object from the pool. |
ohair@286 | 57 | * |
ohair@286 | 58 | * <p> |
ohair@286 | 59 | * If no object is available in the pool, this method creates a new one. |
ohair@286 | 60 | * |
ohair@286 | 61 | * @return |
ohair@286 | 62 | * always non-null. |
ohair@286 | 63 | */ |
ohair@286 | 64 | public final T take() { |
ohair@286 | 65 | T t = getQueue().poll(); |
ohair@286 | 66 | if(t==null) |
ohair@286 | 67 | return create(); |
ohair@286 | 68 | return t; |
ohair@286 | 69 | } |
ohair@286 | 70 | |
ohair@286 | 71 | private ConcurrentLinkedQueue<T> getQueue() { |
ohair@286 | 72 | WeakReference<ConcurrentLinkedQueue<T>> q = queue; |
ohair@286 | 73 | if (q != null) { |
ohair@286 | 74 | ConcurrentLinkedQueue<T> d = q.get(); |
ohair@286 | 75 | if (d != null) |
ohair@286 | 76 | return d; |
ohair@286 | 77 | } |
ohair@286 | 78 | |
ohair@286 | 79 | // overwrite the queue |
ohair@286 | 80 | ConcurrentLinkedQueue<T> d = new ConcurrentLinkedQueue<T>(); |
ohair@286 | 81 | queue = new WeakReference<ConcurrentLinkedQueue<T>>(d); |
ohair@286 | 82 | |
ohair@286 | 83 | return d; |
ohair@286 | 84 | } |
ohair@286 | 85 | |
ohair@286 | 86 | /** |
ohair@286 | 87 | * Returns an object back to the pool. |
ohair@286 | 88 | */ |
ohair@286 | 89 | public final void recycle(T t) { |
ohair@286 | 90 | getQueue().offer(t); |
ohair@286 | 91 | } |
ohair@286 | 92 | |
ohair@286 | 93 | /** |
ohair@286 | 94 | * Creates a new instance of object. |
ohair@286 | 95 | * |
ohair@286 | 96 | * <p> |
ohair@286 | 97 | * This method is used when someone wants to |
ohair@286 | 98 | * {@link #take() take} an object from an empty pool. |
ohair@286 | 99 | * |
ohair@286 | 100 | * <p> |
ohair@286 | 101 | * Also note that multiple threads may call this method |
ohair@286 | 102 | * concurrently. |
ohair@286 | 103 | */ |
ohair@286 | 104 | protected abstract T create(); |
ohair@286 | 105 | |
ohair@286 | 106 | |
ohair@286 | 107 | /** |
ohair@286 | 108 | * JAXB {@link javax.xml.bind.Marshaller} pool. |
ohair@286 | 109 | */ |
ohair@286 | 110 | public static final class Marshaller extends Pool<javax.xml.bind.Marshaller> { |
ohair@286 | 111 | private final JAXBContext context; |
ohair@286 | 112 | |
ohair@286 | 113 | public Marshaller(JAXBContext context) { |
ohair@286 | 114 | this.context = context; |
ohair@286 | 115 | } |
ohair@286 | 116 | |
ohair@286 | 117 | protected javax.xml.bind.Marshaller create() { |
ohair@286 | 118 | try { |
ohair@286 | 119 | return context.createMarshaller(); |
ohair@286 | 120 | } catch (JAXBException e) { |
ohair@286 | 121 | // impossible |
ohair@286 | 122 | throw new AssertionError(e); |
ohair@286 | 123 | } |
ohair@286 | 124 | } |
ohair@286 | 125 | } |
ohair@286 | 126 | |
ohair@286 | 127 | /** |
ohair@286 | 128 | * JAXB {@link javax.xml.bind.Marshaller} pool. |
ohair@286 | 129 | */ |
ohair@286 | 130 | public static final class Unmarshaller extends Pool<javax.xml.bind.Unmarshaller> { |
ohair@286 | 131 | private final JAXBContext context; |
ohair@286 | 132 | |
ohair@286 | 133 | public Unmarshaller(JAXBContext context) { |
ohair@286 | 134 | this.context = context; |
ohair@286 | 135 | } |
ohair@286 | 136 | |
ohair@286 | 137 | protected javax.xml.bind.Unmarshaller create() { |
ohair@286 | 138 | try { |
ohair@286 | 139 | return context.createUnmarshaller(); |
ohair@286 | 140 | } catch (JAXBException e) { |
ohair@286 | 141 | // impossible |
ohair@286 | 142 | throw new AssertionError(e); |
ohair@286 | 143 | } |
ohair@286 | 144 | } |
ohair@286 | 145 | } |
ohair@286 | 146 | |
ohair@286 | 147 | /** |
ohair@286 | 148 | * {@link Tube} pool. |
ohair@286 | 149 | */ |
ohair@286 | 150 | public static final class TubePool extends Pool<Tube> { |
ohair@286 | 151 | private final Tube master; |
ohair@286 | 152 | |
ohair@286 | 153 | public TubePool(Tube master) { |
ohair@286 | 154 | this.master = master; |
ohair@286 | 155 | recycle(master); // we'll use master as a part of the pool, too. |
ohair@286 | 156 | } |
ohair@286 | 157 | |
ohair@286 | 158 | protected Tube create() { |
ohair@286 | 159 | return TubeCloner.clone(master); |
ohair@286 | 160 | } |
ohair@286 | 161 | } |
ohair@286 | 162 | } |