    001    package org.apache.turbine.services.schedule;
    002
    003    /*
    004     * Licensed to the Apache Software Foundation (ASF) under one
    005     * or more contributor license agreements.  See the NOTICE file
    006     * distributed with this work for additional information
    007     * regarding copyright ownership.  The ASF licenses this file
    008     * to you under the Apache License, Version 2.0 (the
    009     * "License"); you may not use this file except in compliance
    010     * with the License.  You may obtain a copy of the License at
    011     *
    012     *   http://www.apache.org/licenses/LICENSE-2.0
    013     *
    014     * Unless required by applicable law or agreed to in writing,
    015     * software distributed under the License is distributed on an
    016     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    017     * KIND, either express or implied.  See the License for the
    018     * specific language governing permissions and limitations
    019     * under the License.
    020     */
    021
    022    import org.apache.commons.logging.Log;
    023    import org.apache.commons.logging.LogFactory;
    024    import org.apache.turbine.modules.ScheduledJobLoader;
    025
    026    /**
    027     * Wrapper for a <code>JobEntry</code> to actually perform the job's action.
    028     *
    029     * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
    030     * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
    031     * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
    032     * @author <a href="mailto:quintonm@bellsouth.net">Quinton McCombs</a>
    033     * @version $Id: WorkerThread.java 534527 2007-05-02 16:10:59Z tv $
    034     */
    035    public class WorkerThread
    036            implements Runnable
    037    {
    038        /**
    039         * The <code>JobEntry</code> to run.
    040         */
    041        private JobEntry je = null;
    042
    043        /** Logging */
    044        private static Log log = LogFactory.getLog(ScheduleService.LOGGER_NAME);
    045
    046        /**
    047         * Creates a new worker to run the specified <code>JobEntry</code>.
    048         *
    049         * @param je The <code>JobEntry</code> to create a worker for.
    050         */
    051        public WorkerThread(JobEntry je)
    052        {
    053            this.je = je;
    054        }
    055
    056        /**
    057         * Run the job.
    058         */
    059        public void run()
    060        {
    061            if (je == null || je.isActive())
    062            {
    063                return;
    064            }
    065
    066            try
    067            {
    068                if (!je.isActive())
    069                {
    070                    je.setActive(true);
    071                    logStateChange("started");
    072                    ScheduledJobLoader.getInstance().exec(je, je.getTask());
    073                }
    074            }
    075            catch (Exception e)
    076            {
    077                log.error("Error in WorkerThread for scheduled job #" +
    078                        je.getPrimaryKey() + ", task: " + je.getTask(), e);
    079            }
    080            finally
    081            {
    082                if (je.isActive())
    083                {
    084                    je.setActive(false);
    085                    logStateChange("completed");
    086                }
    087            }
    088        }
    089
    090        /**
    091         * Macro to log <code>JobEntry</code> status information.
    092         *
    093         * @param state The new state of the <code>JobEntry</code>.
    094         */
    095        private final void logStateChange(String state)
    096        {
    097            log.debug("Scheduled job #" + je.getPrimaryKey() + ' ' + state +
    098                    ", task: " + je.getTask());
    099        }
    100    }