Coverage Report - org.apache.commons.pool.BaseObjectPool
 
Classes in this File Line Coverage Branch Coverage Complexity
BaseObjectPool
0%
0/13
0%
0/2
1.455
 
 1  
 /*
 2  
  * Licensed to the Apache Software Foundation (ASF) under one or more
 3  
  * contributor license agreements.  See the NOTICE file distributed with
 4  
  * this work for additional information regarding copyright ownership.
 5  
  * The ASF licenses this file to You under the Apache License, Version 2.0
 6  
  * (the "License"); you may not use this file except in compliance with
 7  
  * the License.  You may obtain a copy of the License at
 8  
  *
 9  
  *      http://www.apache.org/licenses/LICENSE-2.0
 10  
  *
 11  
  * Unless required by applicable law or agreed to in writing, software
 12  
  * distributed under the License is distributed on an "AS IS" BASIS,
 13  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 14  
  * See the License for the specific language governing permissions and
 15  
  * limitations under the License.
 16  
  */
 17  
 
 18  
 package org.apache.commons.pool;
 19  
 
 20  
 /**
 21  
  * A simple base implementation of {@link ObjectPool}.
 22  
  * Optional operations are implemented to either do nothing, return a value
 23  
  * indicating it is unsupported or throw {@link UnsupportedOperationException}.
 24  
  *
 25  
  * @author Rodney Waldhoff
 26  
  * @author Sandy McArthur
 27  
  * @version $Revision: 791364 $ $Date: 2009-07-05 21:52:27 -0400 (Sun, 05 Jul 2009) $
 28  
  * @since Pool 1.0
 29  
  */
 30  0
 public abstract class BaseObjectPool implements ObjectPool {
 31  
     /**
 32  
      * Obtains an instance from the pool.
 33  
      * 
 34  
      * @return an instance from the pool
 35  
      * @throws Exception if an instance cannot be obtained from the pool
 36  
      */
 37  
     public abstract Object borrowObject() throws Exception;
 38  
     
 39  
     /**
 40  
      * Returns an instance to the pool.
 41  
      * 
 42  
      * @param obj instance to return to the pool
 43  
      */
 44  
     public abstract void returnObject(Object obj) throws Exception;
 45  
     
 46  
     /**
 47  
      * Invalidates an object from the pool.
 48  
      * By contract, <code>obj</code> <strong>must</strong> have been obtained
 49  
      * using {@link #borrowObject borrowObject}
 50  
      * or a related method as defined in an implementation
 51  
      * or sub-interface.
 52  
      * <p>
 53  
      * This method should be used when an object that has been borrowed
 54  
      * is determined (due to an exception or other problem) to be invalid.
 55  
      * </p>
 56  
      *
 57  
      * @param obj a {@link #borrowObject borrowed} instance to be disposed.
 58  
      * @throws Exception 
 59  
      */
 60  
     public abstract void invalidateObject(Object obj) throws Exception;
 61  
 
 62  
     /**
 63  
      * Not supported in this base implementation.
 64  
      * @return a negative value.
 65  
      * 
 66  
      * @throws UnsupportedOperationException
 67  
      */
 68  
     public int getNumIdle() throws UnsupportedOperationException {
 69  0
         return -1;
 70  
     }
 71  
 
 72  
     /**
 73  
      * Not supported in this base implementation.
 74  
      * @return a negative value.
 75  
      * 
 76  
      * @throws UnsupportedOperationException
 77  
      */
 78  
     public int getNumActive() throws UnsupportedOperationException {
 79  0
         return -1;
 80  
     }
 81  
 
 82  
     /**
 83  
      * Not supported in this base implementation.
 84  
      * 
 85  
      * @throws UnsupportedOperationException
 86  
      */
 87  
     public void clear() throws Exception, UnsupportedOperationException {
 88  0
         throw new UnsupportedOperationException();
 89  
     }
 90  
 
 91  
     /**
 92  
      * Not supported in this base implementation.
 93  
      * Always throws an {@link UnsupportedOperationException},
 94  
      * subclasses should override this behavior.
 95  
      * 
 96  
      * @throws UnsupportedOperationException
 97  
      */
 98  
     public void addObject() throws Exception, UnsupportedOperationException {
 99  0
         throw new UnsupportedOperationException();
 100  
     }
 101  
 
 102  
     /**
 103  
      * Close this pool.
 104  
      * This affects the behavior of <code>isClosed</code> and <code>assertOpen</code>.
 105  
      */
 106  
     public void close() throws Exception {
 107  0
         closed = true;
 108  0
     }
 109  
 
 110  
     /**
 111  
      * Not supported in this base implementation.
 112  
      * Always throws an {@link UnsupportedOperationException},
 113  
      * subclasses should override this behavior.
 114  
      * 
 115  
      * @param factory the PoolableObjectFactory
 116  
      * @throws UnsupportedOperationException
 117  
      * @throws IllegalStateException
 118  
      */
 119  
     public void setFactory(PoolableObjectFactory factory) throws IllegalStateException, UnsupportedOperationException {
 120  0
         throw new UnsupportedOperationException();
 121  
     }
 122  
 
 123  
     /**
 124  
      * Has this pool instance been closed.
 125  
      * @return <code>true</code> when this pool has been closed.
 126  
      */
 127  
     protected final boolean isClosed() {
 128  0
         return closed;
 129  
     }
 130  
 
 131  
     /**
 132  
      * Throws an <code>IllegalStateException</code> when this pool has been closed.
 133  
      * @throws IllegalStateException when this pool has been closed.
 134  
      * @see #isClosed()
 135  
      */
 136  
     protected final void assertOpen() throws IllegalStateException {
 137  0
         if (isClosed()) {
 138  0
             throw new IllegalStateException("Pool not open");
 139  
         }
 140  0
     }
 141  
 
 142  
     /** Whether or not the pool is closed */
 143  0
     private volatile boolean closed = false;
 144  
 }