Example #1
0
  @Override
  public void initialize(MasterServices master, MetricsMaster metricsMaster)
      throws KeeperException, IOException, UnsupportedOperationException {
    this.master = master;

    this.rootDir = master.getMasterFileSystem().getRootDir();
    checkSnapshotSupport(master.getConfiguration(), master.getMasterFileSystem());

    // get the configuration for the coordinator
    Configuration conf = master.getConfiguration();
    long wakeFrequency = conf.getInt(SNAPSHOT_WAKE_MILLIS_KEY, SNAPSHOT_WAKE_MILLIS_DEFAULT);
    long timeoutMillis =
        Math.max(
            conf.getLong(
                SnapshotDescriptionUtils.SNAPSHOT_TIMEOUT_MILLIS_KEY,
                SnapshotDescriptionUtils.SNAPSHOT_TIMEOUT_MILLIS_DEFAULT),
            conf.getLong(
                SnapshotDescriptionUtils.MASTER_SNAPSHOT_TIMEOUT_MILLIS,
                SnapshotDescriptionUtils.DEFAULT_MAX_WAIT_TIME));
    int opThreads = conf.getInt(SNAPSHOT_POOL_THREADS_KEY, SNAPSHOT_POOL_THREADS_DEFAULT);

    // setup the default procedure coordinator
    String name = master.getServerName().toString();
    ThreadPoolExecutor tpool = ProcedureCoordinator.defaultPool(name, opThreads);
    ProcedureCoordinatorRpcs comms =
        new ZKProcedureCoordinatorRpcs(
            master.getZooKeeper(), SnapshotManager.ONLINE_SNAPSHOT_CONTROLLER_DESCRIPTION, name);

    this.coordinator = new ProcedureCoordinator(comms, tpool, timeoutMillis, wakeFrequency);
    this.executorService = master.getExecutorService();
    resetTempDir();
  }
  @Override
  public void cancel(String why) {
    if (finished) return;

    this.finished = true;
    LOG.info(
        "Stop taking snapshot="
            + ClientSnapshotDescriptionUtils.toString(snapshot)
            + " because: "
            + why);
    CancellationException ce = new CancellationException(why);
    monitor.receive(new ForeignException(master.getServerName().toString(), ce));
  }