| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.tomcat.dbcp.pool2; |
| |
| /** |
| * A base implementation of <code>KeyedPooledObjectFactory</code>. |
| * <p> |
| * All operations defined here are essentially no-op's. |
| * </p> |
| * This class is immutable, and therefore thread-safe. |
| * |
| * @see KeyedPooledObjectFactory |
| * |
| * @param <K> The type of keys managed by this factory. |
| * @param <V> Type of element managed by this factory. |
| * |
| * @since 2.0 |
| */ |
| public abstract class BaseKeyedPooledObjectFactory<K,V> extends BaseObject |
| implements KeyedPooledObjectFactory<K,V> { |
| |
| /** |
| * Create an instance that can be served by the pool. |
| * |
| * @param key the key used when constructing the object |
| * @return an instance that can be served by the pool |
| * |
| * @throws Exception if there is a problem creating a new instance, |
| * this will be propagated to the code requesting an object. |
| */ |
| public abstract V create(K key) |
| throws Exception; |
| |
| /** |
| * Wrap the provided instance with an implementation of |
| * {@link PooledObject}. |
| * |
| * @param value the instance to wrap |
| * |
| * @return The provided instance, wrapped by a {@link PooledObject} |
| */ |
| public abstract PooledObject<V> wrap(V value); |
| |
| @Override |
| public PooledObject<V> makeObject(final K key) throws Exception { |
| return wrap(create(key)); |
| } |
| |
| /** |
| * Destroy an instance no longer needed by the pool. |
| * <p> |
| * The default implementation is a no-op. |
| * |
| * @param key the key used when selecting the instance |
| * @param p a {@code PooledObject} wrapping the instance to be destroyed |
| */ |
| @Override |
| public void destroyObject(final K key, final PooledObject<V> p) |
| throws Exception { |
| // The default implementation is a no-op. |
| } |
| |
| /** |
| * Ensures that the instance is safe to be returned by the pool. |
| * <p> |
| * The default implementation always returns {@code true}. |
| * |
| * @param key the key used when selecting the object |
| * @param p a {@code PooledObject} wrapping the instance to be validated |
| * @return always <code>true</code> in the default implementation |
| */ |
| @Override |
| public boolean validateObject(final K key, final PooledObject<V> p) { |
| return true; |
| } |
| |
| /** |
| * Reinitialize an instance to be returned by the pool. |
| * <p> |
| * The default implementation is a no-op. |
| * |
| * @param key the key used when selecting the object |
| * @param p a {@code PooledObject} wrapping the instance to be activated |
| */ |
| @Override |
| public void activateObject(final K key, final PooledObject<V> p) |
| throws Exception { |
| // The default implementation is a no-op. |
| } |
| |
| /** |
| * Uninitialize an instance to be returned to the idle object pool. |
| * <p> |
| * The default implementation is a no-op. |
| * |
| * @param key the key used when selecting the object |
| * @param p a {@code PooledObject} wrapping the instance to be passivated |
| */ |
| @Override |
| public void passivateObject(final K key, final PooledObject<V> p) |
| throws Exception { |
| // The default implementation is a no-op. |
| } |
| } |