DefaultEvictionPolicy.java
- /*
- * 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.commons.pool2.impl;
- import org.apache.commons.pool2.PooledObject;
- /**
- * Provides the default implementation of {@link EvictionPolicy} used by the pools.
- * <p>
- * Objects will be evicted if the following conditions are met:
- * </p>
- * <ul>
- * <li>The object has been idle longer than
- * {@link GenericObjectPool#getMinEvictableIdleDuration()} /
- * {@link GenericKeyedObjectPool#getMinEvictableIdleDuration()}</li>
- * <li>There are more than {@link GenericObjectPool#getMinIdle()} /
- * {@link GenericKeyedObjectPoolConfig#getMinIdlePerKey()} idle objects in
- * the pool and the object has been idle for longer than
- * {@link GenericObjectPool#getSoftMinEvictableIdleDuration()} /
- * {@link GenericKeyedObjectPool#getSoftMinEvictableIdleDuration()}
- * </ul>
- * <p>
- * This class is immutable and thread-safe.
- * </p>
- *
- * @param <T> the type of objects in the pool.
- * @since 2.0
- */
- public class DefaultEvictionPolicy<T> implements EvictionPolicy<T> {
- /**
- * Constructs a new instance.
- */
- public DefaultEvictionPolicy() {
- // empty
- }
- @Override
- public boolean evict(final EvictionConfig config, final PooledObject<T> underTest, final int idleCount) {
- // @formatter:off
- return config.getIdleSoftEvictDuration().compareTo(underTest.getIdleDuration()) < 0 &&
- config.getMinIdle() < idleCount ||
- config.getIdleEvictDuration().compareTo(underTest.getIdleDuration()) < 0;
- // @formatter:on
- }
- }