How to use

close

method

in

io.pravega.shared.metrics.StatsProvider

@Override
public void close() {
  instance.get().close();
}

@Override
protected void shutDown() {
  this.serviceBuilder.close();
  stopBookKeeper();
  val zk = this.zkClient;
  if (zk != null) {
    zk.close();
    this.zkClient = null;
  }
  StatsProvider sp = this.statsProvider;
  if (sp != null) {
    sp.close();
    this.statsProvider = null;
  }
  Runtime.getRuntime().removeShutdownHook(this.stopBookKeeperProcess);
}

public void shutdown() {
  if (!this.closed) {
    this.serviceBuilder.close();
    log.info("StreamSegmentService shut down.");
    if (this.listener != null) {
      this.listener.close();
      log.info("PravegaConnectionListener closed.");
    }
    if (this.statsProvider != null) {
      statsProvider.close();
      statsProvider = null;
      log.info("Metrics statsProvider is now closed.");
    }
    if (this.zkClient != null) {
      this.zkClient.close();
      this.zkClient = null;
      log.info("ZooKeeper Client shut down.");
    }
    if (this.segmentStatsFactory != null) {
      segmentStatsFactory.close();
    }
    if (this.serviceConfig.isSecureZK()) {
      ZKTLSUtils.unsetSecureZKClientProperties();
    }
    this.closed = true;
  }
}

@After
public void tearDown() throws Exception {
  if (this.statsProvider != null) {
    statsProvider.close();
    statsProvider = null;
    log.info("Metrics statsProvider is now closed.");
  }
  if (this.controllerWrapper != null) {
    this.controllerWrapper.close();
    this.controllerWrapper = null;
  }
  if (this.server != null) {
    this.server.close();
    this.server = null;
  }
  if (this.zkTestServer != null) {
    this.zkTestServer.close();
    this.zkTestServer = null;
  }
}

@After
public void tearDown() throws Exception {
  if (this.statsProvider != null) {
    statsProvider.close();
    statsProvider = null;
    log.info("Metrics statsProvider is now closed.");
  }
  ExecutorServiceHelpers.shutdown(executor);
  controllerWrapper.close();
  server.close();
  serviceBuilder.close();
  zkTestServer.close();
}

} finally {
  if (statsProvider != null) {
    statsProvider.close();