modules/kernel/src/org/apache/axis2/deployment/scheduler/SchedulerTask.java

/*
* Copyright 2004,2005 The Apache Software Foundation.
*
* Licensed 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.axis2.deployment.scheduler;

import org.apache.axis2.deployment.RepositoryListener;

import java.util.TimerTask;

public class SchedulerTask implements Runnable {
    static final int SCHEDULED = 1;
    static final int CANCELLED = 2;
    final Object lock = new Object();
    int state = 0;
    TimerTask timerTask;
    private RepositoryListener wsListener;

    /**
     * Creates a new scheduler task.
     */
    public SchedulerTask(RepositoryListener listener) {
        this.wsListener = listener;
    }

    /**
     * Cancels this scheduler task.
     * <p/>
     * This method may be called repeatedly; the second and subsequent calls have no effect.
     *
     * @return Returns true if this task was already scheduled to run.
     */
    public boolean cancel() {
        synchronized (lock) {
            if (timerTask != null) {
                timerTask.cancel();
            }

            boolean result = (state == SCHEDULED);

            state = CANCELLED;

            return result;
        }
    }

    private void checkRepository() {
        wsListener.startListener();
    }

    /**
     * The action to be performed by this scheduler task.
     */
    public void run() {
        checkRepository();
    }
}