/**
*
* 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.airavata.orchestrator.util;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.airavata.common.exception.ApplicationSettingsException;
import org.apache.airavata.common.utils.ServerSettings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class OrchestratorServerThreadPoolExecutor {
    private static final Logger logger = LoggerFactory.getLogger(OrchestratorServerThreadPoolExecutor.class);
    public static final String AIRAVATA_SERVER_THREAD_POOL_SIZE = "airavata.server.thread.pool.size";

    private static ExecutorService threadPool;

    public static ExecutorService getCachedThreadPool() {
        if (threadPool == null) {
            threadPool = Executors.newCachedThreadPool();
        }
        return threadPool;
    }

    public static ExecutorService getFixedThreadPool() {
        if (threadPool == null) {
            try {
                threadPool = Executors.newFixedThreadPool(
                        Integer.parseInt(ServerSettings.getSetting(AIRAVATA_SERVER_THREAD_POOL_SIZE)));
            } catch (ApplicationSettingsException e) {
                logger.error("Error reading " + AIRAVATA_SERVER_THREAD_POOL_SIZE + " property");
            }
        }
        return threadPool;
    }
}
