newsfeedcontextlistener.java

### File Source: newsfeedcontextlistener.java

             /*
        P/P   *  Method: void net.sourceforge.pebble.aggregator.NewsFeedContextListener$1(NewsFeedContextListener)
              */
         1  /*
         2   * Copyright (c) 2003-2006, Simon Brown
         3   * All rights reserved.
         4   *
         5   * Redistribution and use in source and binary forms, with or without
         6   * modification, are permitted provided that the following conditions are met:
         7   *
         8   *   - Redistributions of source code must retain the above copyright
         9   *     notice, this list of conditions and the following disclaimer.
        10   *
        11   *   - Redistributions in binary form must reproduce the above copyright
        12   *     notice, this list of conditions and the following disclaimer in
        13   *     the documentation and/or other materials provided with the
        14   *     distribution.
        15   *
        16   *   - Neither the name of Pebble nor the names of its contributors may
        17   *     be used to endorse or promote products derived from this software
        18   *     without specific prior written permission.
        19   *
        20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
        21   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        22   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        23   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
        24   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
        25   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
        26   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
        27   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
        28   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
        29   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        30   * POSSIBILITY OF SUCH DAMAGE.
        31   */
        32  package net.sourceforge.pebble.aggregator;
        33
        34  import org.apache.commons.logging.Log;
        35  import org.apache.commons.logging.LogFactory;
        36
             /*
        P/P   *  Method: void net.sourceforge.pebble.aggregator.NewsFeedContextListener()
              */
        37  import javax.servlet.ServletContextListener;
        38  import javax.servlet.ServletContextEvent;
        39  import java.util.Timer;
        40  import java.util.TimerTask;
        41
        42  /**
        43   * Manages a timer that regularly updates all news feeds that have been
        44   * subscribed to.
        45   *
        46   * @author    Simon Brown
        47   */
        48  public class NewsFeedContextListener implements ServletContextListener {
        49
        50    private static final long ONE_MINUTE = 1000 * 60;
               /*
        P/P     *  Method: Log access$0()
                *
                *  Postconditions:
                *    init'ed(return_value)
                */
        51    private static final Log log = LogFactory.getLog(NewsFeedContextListener.class);
        52
        53    private Timer timer;
        54
        55    public void contextInitialized(ServletContextEvent servletContextEvent) {
                 /*
        P/P       *  Method: void contextInitialized(ServletContextEvent)
                  *
                  *  Presumptions:
                  *    org.apache.commons.logging.LogFactory:getLog(...)@51 != null
                  *
                  *  Postconditions:
                  *    this.timer == &new Timer(contextInitialized#1)
                  *    new Timer(contextInitialized#1) num objects == 1
                  */
        56      log.info("Starting newsfeed updater");
        57      timer = new Timer();
        58      timer.scheduleAtFixedRate(new TimerTask() {
        59        public void run() {
        60          try {
                       /*
        P/P             *  Method: void run()
                        *
                        *  Presumptions:
                        *    org.apache.commons.logging.LogFactory:getLog(...)@51 != null
                        */
        61            NewsFeedCache.getInstance().refreshFeeds();
        62          } catch (Exception e) {
        63            log.error("Error while refreshing feeds " + e.getMessage());
        64            e.printStackTrace();
        65          }
        66        }
        67      }, 0, ONE_MINUTE * 15);
        68    }
        69
        70    public void contextDestroyed(ServletContextEvent servletContextEvent) {
                 /*
        P/P       *  Method: void contextDestroyed(ServletContextEvent)
                  *
                  *  Preconditions:
                  *    this.timer != null
                  *
                  *  Presumptions:
                  *    org.apache.commons.logging.LogFactory:getLog(...)@51 != null
                  */
        71      log.info("Stopping newsfeed updater");
        72      timer.cancel();
        73    }
        74
        75  }

SofCheck Inspector Build Version : 2.22510

newsfeedcontextlistener.java | 2010-Jun-25 19:40:32
newsfeedcontextlistener.class | 2010-Jul-19 20:23:40
newsfeedcontextlistener$1.class | 2010-Jul-19 20:23:40