Android Open Source - makler Updating Thread

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License

The source code is released under:

GNU General Public License

Java Source Code

package pl.net.newton.Makler.gpw.service;
//from w  w  w  .  ja v a  2s.co  m
import java.util.Calendar;

import pl.net.newton.Makler.common.GpwUtils;
import android.util.Log;

class UpdatingThread implements Runnable {
  private final QuotesService quotesService;

  private volatile Thread runner;

  private Calendar lastUpdate;

  UpdatingThread(QuotesService quotesService) {
    this.quotesService = quotesService;
  }

  public void run() {
    while (Thread.currentThread() == runner) {
      lastUpdate = Calendar.getInstance();
      int freq = this.quotesService.config.getFreqForeground();
      if (GpwUtils.gpwActive() && freq != 0 && this.quotesService.foreground) {
        try {
          this.quotesService.updateQuotes();
          notifyListeners();
        } catch (Exception e) {
          Log.e(QuotesService.TAG, "can't update quotes", e);
        }
      }
      Log.d(QuotesService.TAG, "waiting for " + freq + "s");
      try {
        Thread.sleep(1000 * freq);
      } catch (InterruptedException e) {
        Log.e(QuotesService.TAG, "Interrupted quote update loop", e);
        return;
      }
    }
  }

  private void notifyListeners() {
    for (QuotesListener listener : this.quotesService.listeners) {
      listener.quotesUpdated();
    }
  }

  public synchronized void startThread() {
    if (!isAlive()) {
      runner = new Thread(this);
      runner.start();
    }
  }

  public synchronized void stopThread() {
    if (runner != null) {
      Thread moribund = runner;
      runner = null;
      moribund.interrupt();
    }
  }

  private boolean isAlive() {
    if (runner == null) {
      return false;
    }
    if (!runner.isAlive()) {
      return false;
    }
    Calendar now = Calendar.getInstance();
    now.add(Calendar.SECOND, -(this.quotesService.config.getFreqForeground() + 30));
    return lastUpdate.after(now);
  }
}

Java Source Code List

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