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/*
* 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.impl;
import org.apache.tomcat.dbcp.pool2.PooledObject;
/**
* To provide a custom eviction policy (i.e. something other than {@link
* DefaultEvictionPolicy} for a pool, users must provide an implementation of
* this interface that provides the required eviction policy.
*
* @param <T> the type of objects in the pool
* @since 2.0
*/
public interface EvictionPolicy<T> {
/**
* Tests if an idle object in the pool should be evicted or not.
*
* @param config The pool configuration settings related to eviction
* @param underTest The pooled object being tested for eviction
* @param idleCount The current number of idle objects in the pool including
* the object under test
* @return {@code true} if the object should be evicted, otherwise
* {@code false}
*/
boolean evict(EvictionConfig config, PooledObject<T> underTest, int idleCount);
}
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