001    /**
002     *  Licensed to the Apache Software Foundation (ASF) under one or more
003     *  contributor license agreements.  See the NOTICE file distributed with
004     *  this work for additional information regarding copyright ownership.
005     *  The ASF licenses this file to You under the Apache License, Version 2.0
006     *  (the "License"); you may not use this file except in compliance with
007     *  the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    
018    package org.apache.geronimo.connector.work.pool;
019    
020    import java.util.concurrent.Executor;
021    
022    /**
023     * Defines the operations that a pool in charge of the execution of Work
024     * instances must expose.
025     *
026     * @version $Rev: 520573 $ $Date: 2007-03-20 16:48:26 -0400 (Tue, 20 Mar 2007) $
027     */
028    public interface WorkExecutorPool extends Executor {
029    
030        /**
031         * Gets the current number of active threads in the pool.
032         *
033         * @return Number of active threads in the pool.
034         */
035        public int getPoolSize();
036    
037        /**
038         * Gets the maximum number of threads to simultaneously execute.
039         *
040         * @return Maximum size.
041         */
042        public int getMaximumPoolSize();
043    
044        /**
045         * Sets the maximum number of threads to simultaneously execute.
046         *
047         * @param aSize Maximum size.
048         */
049        public void setMaximumPoolSize(int aSize);
050    
051        public WorkExecutorPool start();
052    
053        public WorkExecutorPool stop();
054    
055    }