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JPPF, the open source grid computing solution

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/*
 * JPPF.
 * Copyright (C) 2005-2015 JPPF Team.
 * http://www.jppf.org
 *
 * 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.jppf.ui.monitoring.data;

import java.util.TimerTask;

import org.jppf.client.JPPFClientConnectionStatus;
import org.jppf.client.monitoring.topology.TopologyDriver;

/**
 * Instances of this class are tasks run periodically from a timer thread, requesting the latest
 * statistics form a JPPF driver connection each time they are run.
 * @author Laurent Cohen
 */
public class StatsRefreshTask extends TimerTask {
  /**
   * Client connection to request the data from.
   */
  private final TopologyDriver driver;

  /**
   * Initialize this task with a specified client connection.
   * @param driver represents the connection to use to request data.
   */
  public StatsRefreshTask(final TopologyDriver driver) {
    this.driver = driver;
  }

  /**
   * Request an update from the JPPF driver.
   */
  @Override
  public void run() {
    JPPFClientConnectionStatus status = driver.getConnection().getStatus();
    if (status.isWorkingStatus()) StatsHandler.getInstance().requestUpdate(driver);
  }
}