/**
* 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.hadoop.hive.common;
/** Simple object pool to prevent GC on small objects passed between threads. */
public interface Pool<T> {
/** Object helper for objects stored in the pool. */
public interface PoolObjectHelper<T> {
/** Called to create an object when one cannot be provided.
* @return a newly allocated object
*/
T create();
/** Called before the object is put in the pool (regardless of whether put succeeds).
* @param t the object to reset
*/
void resetBeforeOffer(T t);
}
T take();
void offer(T t);
int size();
}