Coverage Report - com.sun.grizzly.ConnectorInstanceHandler
 
Classes in this File Line Coverage Branch Coverage Complexity
ConnectorInstanceHandler
N/A
N/A
0
ConnectorInstanceHandler$ConcurrentQueueConnectorInstanceHandler
100 %
9/9
100 %
2/2
0
ConnectorInstanceHandler$ConcurrentQueueDelegateCIH
67 %
4/6
N/A
0
 
 1  
 /*
 2  
  * 
 3  
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 4  
  * 
 5  
  * Copyright 2007-2008 Sun Microsystems, Inc. All rights reserved.
 6  
  * 
 7  
  * The contents of this file are subject to the terms of either the GNU
 8  
  * General Public License Version 2 only ("GPL") or the Common Development
 9  
  * and Distribution License("CDDL") (collectively, the "License").  You
 10  
  * may not use this file except in compliance with the License. You can obtain
 11  
  * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 12  
  * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 13  
  * language governing permissions and limitations under the License.
 14  
  * 
 15  
  * When distributing the software, include this License Header Notice in each
 16  
  * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 17  
  * Sun designates this particular file as subject to the "Classpath" exception
 18  
  * as provided by Sun in the GPL Version 2 section of the License file that
 19  
  * accompanied this code.  If applicable, add the following below the License
 20  
  * Header, with the fields enclosed by brackets [] replaced by your own
 21  
  * identifying information: "Portions Copyrighted [year]
 22  
  * [name of copyright owner]"
 23  
  * 
 24  
  * Contributor(s):
 25  
  * 
 26  
  * If you wish your version of this file to be governed by only the CDDL or
 27  
  * only the GPL Version 2, indicate your decision by adding "[Contributor]
 28  
  * elects to include this software in this distribution under the [CDDL or GPL
 29  
  * Version 2] license."  If you don't indicate a single choice of license, a
 30  
  * recipient has the option to distribute your version of this file under
 31  
  * either the CDDL, the GPL Version 2 or to extend the choice of license to
 32  
  * its licensees as provided above.  However, if you add GPL Version 2 code
 33  
  * and therefore, elected the GPL Version 2 license, then the option applies
 34  
  * only if the new code is made subject to such option by the copyright
 35  
  * holder.
 36  
  *
 37  
  */
 38  
 
 39  
 package com.sun.grizzly;
 40  
 
 41  
 import java.util.concurrent.Callable;
 42  
 import java.util.concurrent.ConcurrentLinkedQueue;
 43  
 
 44  
 /**
 45  
  * This interface is responsible of handling {@link ConnectorHandler}
 46  
  * instance creation. This interface can be used to implement a connection
 47  
  * pooling mechanism.
 48  
  *
 49  
  * @param E ConnectorHandler implementation this pool will manage
 50  
  * @author Jeanfrancois
 51  
  */
 52  
 public interface ConnectorInstanceHandler<E extends ConnectorHandler> {
 53  
     
 54  
     
 55  
     /**
 56  
      * Acquire a {@link ConnectorHandler}
 57  
      * @return instance of ConnectorHandler
 58  
      */
 59  
     public E acquire();
 60  
     
 61  
     
 62  
     /**
 63  
      * Release a {@link ConnectorHandler}
 64  
      * @param connectorHandler release connector handler
 65  
      */
 66  
     public void release(E connectorHandler);
 67  
     
 68  
     /**
 69  
      * Concurrent Queue ConnectorInstanceHandler implementation
 70  
      * @param E ConnectorHandler implementation this pool will manage
 71  
      */
 72  
     public abstract class ConcurrentQueueConnectorInstanceHandler<E extends ConnectorHandler> implements ConnectorInstanceHandler<E> {
 73  
         /**
 74  
          * Simple queue used to pool {@link ConnectorHandler}
 75  
          */
 76  
         private ConcurrentLinkedQueue<E> pool;
 77  
         
 78  
         
 79  120
         public ConcurrentQueueConnectorInstanceHandler(){
 80  120
             pool = new ConcurrentLinkedQueue<E>();
 81  120
         }
 82  
         
 83  
         /**
 84  
          * Acquire a {@link ConnectorHandler}
 85  
          */
 86  
         public E acquire(){
 87  177
             E connectorHandler = pool.poll();
 88  177
             if (connectorHandler == null){
 89  14
                 connectorHandler = newInstance();
 90  
             }
 91  177
             return connectorHandler;
 92  
         }
 93  
         
 94  
         /**
 95  
          * Release a {@link ConnectorHandler}
 96  
          */
 97  
         public void release(E connectorHandler){
 98  176
             pool.offer(connectorHandler);
 99  176
         }
 100  
         
 101  
         public abstract E newInstance();
 102  
     }
 103  
     
 104  
     /**
 105  
      * Concurrent Queue ConnectorInstanceHandler implementation
 106  
      * @param E ConnectorHandler implementation this pool will manage
 107  
      */
 108  
     public class ConcurrentQueueDelegateCIH<E extends ConnectorHandler> 
 109  
             extends ConcurrentQueueConnectorInstanceHandler<E> {
 110  
         
 111  
         // ConnectorHandler instance creator
 112  
         private Callable<E> delegate;
 113  
         
 114  119
         public ConcurrentQueueDelegateCIH(Callable<E> delegate) {
 115  119
             this.delegate = delegate;
 116  119
         }
 117  
         
 118  
         public E newInstance() {
 119  
             try {
 120  13
                 return delegate.call();
 121  0
             } catch(Exception e) {
 122  0
                 throw new IllegalStateException("Unexpected exception", e);
 123  
             }
 124  
         }
 125  
     }
 126  
 }