jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/istack/internal/Pool.java@f50545b5e2f1 (annotated)

src/share/jaxws_classes/com/sun/istack/internal/Pool.java@f50545b5e2f1 (annotated)

src/share/jaxws_classes/com/sun/istack/internal/Pool.java

Tue, 06 Mar 2012 16:09:35 -0800

author: ohair
date: Tue, 06 Mar 2012 16:09:35 -0800
changeset 286: f50545b5e2f1
child 368: 0989ad8c0860
permissions: -rw-r--r--

7150322: Stop using drop source bundles in jaxws
Reviewed-by: darcy, ohrstrom

 /*
  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.istack.internal;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.lang.ref.WeakReference;
 /**
  * Pool of reusable objects that are indistinguishable from each other,
  * such as JAXB marshallers.
  *
  * @author Kohsuke Kawaguchi
  */
 public interface Pool<T> {
     /**
      * Gets a new object from the pool.
      *
      * <p>
      * If no object is available in the pool, this method creates a new one.
      */
     @NotNull T take();
     /**
      * Returns an object back to the pool.
      */
     void recycle(@NotNull T t);
     /**
      * Default implementation that uses {@link ConcurrentLinkedQueue}
      * as the data store.
      *
      * <h2>Note for Implementors</h2>
      * <p>
      * Don't rely on the fact that this class extends from {@link ConcurrentLinkedQueue}.
      */
     public abstract class Impl<T> implements Pool<T> {
         private volatile WeakReference<ConcurrentLinkedQueue<T>> queue;
         /**
          * Gets a new object from the pool.
          *
          * <p>
          * If no object is available in the pool, this method creates a new one.
          *
          * @return
          *      always non-null.
          */
         public final @NotNull T take() {
             T t = getQueue().poll();
             if(t==null) {
                 return create();
             }
             return t;
         }
         /**
          * Returns an object back to the pool.
          */
         public final void recycle(T t) {
             getQueue().offer(t);
         }
         private ConcurrentLinkedQueue<T> getQueue() {
             WeakReference<ConcurrentLinkedQueue<T>> q = queue;
             if (q != null) {
                 ConcurrentLinkedQueue<T> d = q.get();
                 if (d != null) {
                     return d;
                 }
             }
             // overwrite the queue
             ConcurrentLinkedQueue<T> d = new ConcurrentLinkedQueue<T>();
             queue = new WeakReference<ConcurrentLinkedQueue<T>>(d);
             return d;
         }
         /**
          * Creates a new instance of object.
          *
          * <p>
          * This method is used when someone wants to
          * {@link #take() take} an object from an empty pool.
          *
          * <p>
          * Also note that multiple threads may call this method
          * concurrently.
          */
         protected abstract @NotNull T create();
     }
 }

Mercurial > jdk8-mips64-public > jaxws / annotate

src/share/jaxws_classes/com/sun/istack/internal/Pool.java@f50545b5e2f1 (annotated)

src/share/jaxws_classes/com/sun/istack/internal/Pool.java