Examples of com.alibaba.wasp.fserver.Leases

com.alibaba.wasp.fserver.Leases

Leases There are several server classes in wasp that need to track external clients that occasionally send heartbeats.

These external clients hold resources in the server class. Those resources need to be released if the external client fails to send a heartbeat after some interval of time passes.

The Leases class is a general reusable class for this kind of pattern. An instance of the Leases class will create a thread to do its dirty work. You should close() the instance if you want to clean up the thread properly.

NOTE: This class extends Thread rather than Chore because the sleep time can be interrupted when there is something to do, rather than the Chore sleep time which is invariant.

   *          configuration
   */
  public MessageBroker(OnlineEntityGroups service, Configuration conf) {
    this.service = service;
    this.conf = conf;
    this.leases = new Leases(conf.getInt(FConstants.THREAD_WAKE_FREQUENCY,
        10 * 1000));
    this.subscriberLeaseTimeoutPeriod = conf.getInt(
        FConstants.WASP_FSEVER_SUBSCRIBER_TIMEOUT_PERIOD,
        FConstants.DEFAULT_WASP_FSEVER_SUBSCRIBER_TIMEOUT_PERIOD);
    this.renew = new RenewRunnable();

    super();
    this.server = server;
    this.connection = FConnectionManager.getConnection(server
        .getConfiguration());
    this.twoPhaseCommit = TwoPhaseCommit.getInstance(server.getActionManager());
    this.leases = new Leases(server.getConfiguration().getInt(
        FConstants.THREAD_WAKE_FREQUENCY,
        FConstants.DEFAULT_THREAD_WAKE_FREQUENCY));
    this.sessionLeaseTimeoutPeriod = this.server.getConfiguration().getInt(
        FConstants.WASP_CLIENT_SESSION_TIMEOUT_PERIOD,
        FConstants.DEFAULT_WASP_CLIENT_SESSION_TIMEOUT_PERIOD);

Related Classes of com.alibaba.wasp.fserver.Leases

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