/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.meidusa.amoeba.net.poolable;
/**
* A simple base impementation of {@link ObjectPool}.
* All optional operations are implemented as throwing
* {@link UnsupportedOperationException}.
*
* @author Rodney Waldhoff
* @version $Revision: 383290 $ $Date: 2006-03-05 02:00:15 -0500 (Sun, 05 Mar 2006) $
*/
public abstract class BaseObjectPool implements ObjectPool {
public abstract Object borrowObject() throws Exception;
public abstract void returnObject(Object obj) throws Exception;
public abstract void invalidateObject(Object obj) throws Exception;
/**
* Not supported in this base implementation.
*/
public int getNumIdle() throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
* Not supported in this base implementation.
*/
public int getNumActive() throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
* Not supported in this base implementation.
*/
public void clear() throws Exception, UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
* Not supported in this base implementation.
*/
public void addObject() throws Exception, UnsupportedOperationException {
throw new UnsupportedOperationException();
}
public void close() throws Exception {
assertOpen();
closed = true;
}
/**
* Not supported in this base implementation.
*/
public void setFactory(PoolableObjectFactory factory) throws IllegalStateException, UnsupportedOperationException {
throw new UnsupportedOperationException();
}
protected final boolean isClosed() {
return closed;
}
protected final void assertOpen() throws IllegalStateException {
if(isClosed()) {
throw new IllegalStateException("Pool not open");
}
}
private volatile boolean closed = false;
}