BPELSchedulerShutdown.java

/*
 * Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. 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.wso2.carbon.bpel.core.ode.integration;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.ode.bpel.iapi.Scheduler;
import org.wso2.carbon.bpel.core.internal.BPELServiceComponent;
import org.wso2.carbon.utils.WaitBeforeShutdownObserver;

/**
 * ODE scheduler should be shutdown before the Hazelcast instance.
 * This class halts the carbon server shutdown until the scheduler is shut.
 */
public class BPELSchedulerShutdown implements WaitBeforeShutdownObserver {

    private static Log log = LogFactory.getLog(BPELSchedulerShutdown.class);
    private boolean status = false;

    //triggered before shutting down server and shutdown the scheduler if exists
    @Override
    public void startingShutdown() {
        Scheduler scheduler = ((BPELServerImpl) BPELServiceComponent.getBPELServer()).getScheduler();
        if (scheduler != null) {
            log.info("Shutting down ode job scheduler.");
            scheduler.shutdown();
        }
        status = true;
    }

    //keep blocking until the status is true
    @Override
    public boolean isTaskComplete() {
        return status;
    }
}