if err := target.init(); err != nil {
		return false, err
	}
	return target.isActive()
}

func (target *ElasticsearchTarget) isActive() (bool, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	err := target.checkAndInitClient(ctx)
	if err != nil {
		return false, err
	}

	return target.client.ping(ctx, target.args)
}

	metaMu := &mc.mu
	rpc := mc.rpc
	cancel := mc.cancel
	defer func() {
		o.debugln(color.Green("saveMetaCacheStream:")+"err:", err)
		if err != nil && !errors.Is(err, io.EOF) {
			go mc.setErr(err.Error())
			cancel()
		}
	}()

	defer cancel()
	// Save continuous updates
	go func() {
		var err error
		ticker := time.NewTicker(10 * time.Second)

        this.lock = lock;
        this.currentFuture = currentFuture;
      }

      @Override
      public void cancel(boolean mayInterruptIfRunning) {
        /*
         * Lock to ensure that a task cannot be rescheduled while a cancel is ongoing.
         *
         * In theory, cancel() could execute arbitrary listeners -- bad to do while holding a lock.

	m[policy] = p
	return nil
}

func (ies *IAMEtcdStore) loadPolicyDocs(ctx context.Context, m map[string]PolicyDoc) error {
	ctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
	defer cancel()
	//  Retrieve all keys and values to avoid too many calls to etcd in case of
	//  a large number of policies
	r, err := ies.client.Get(ctx, iamConfigPoliciesPrefix, etcd.WithPrefix())

  }

  private fun cancelLater(
    call: Call,
    delayMillis: Int,
  ): CountDownLatch {
    val latch = CountDownLatch(1)
    Thread {
      sleep(delayMillis)
      if (cancelMode == CANCEL) {
        call.cancel()
      } else {
        threadToCancel!!.interrupt()
      }
      latch.countDown()
    }.apply { start() }
    return latch
  }

  companion object {

    orig.cancel(true);
    assertTrue(orig.isCancelled());
    assertTrue(prev.isCancelled());
    assertTrue(prev.wasInterrupted());
  }

  public void testSetFutureSelf_cancel() {
    SettableFuture<String> orig = SettableFuture.create();
    orig.setFuture(orig);
    orig.cancel(true);
    assertTrue(orig.isCancelled());
  }

    orig.cancel(true);
    assertTrue(orig.isCancelled());
    assertTrue(prev.isCancelled());
    assertTrue(prev.wasInterrupted());
  }

  public void testSetFutureSelf_cancel() {
    SettableFuture<String> orig = SettableFuture.create();
    orig.setFuture(orig);
    orig.cancel(true);
    assertTrue(orig.isCancelled());
  }

    // stop it.
    blockingCallable.waitForStart();

    // This time, cancel the future for the first task. The task remains running, only the future
    // is cancelled.
    future1.cancel(false);

    // Give the second task a chance to (incorrectly) start up while the first task is running.
    // (This is the assertion that fails.)

    // stop it.
    blockingCallable.waitForStart();

    // This time, cancel the future for the first task. The task remains running, only the future
    // is cancelled.
    future1.cancel(false);

    // Give the second task a chance to (incorrectly) start up while the first task is running.
    // (This is the assertion that fails.)

	// Disconnect from call above, but cancel on exit.
	listCtx, cancel := context.WithCancel(GlobalContext)
	saveCh := make(chan metaCacheEntry, metacacheBlockSize)
	inCh := make(chan metaCacheEntry, metacacheBlockSize)
	outCh := make(chan metaCacheEntry, o.Limit)

	filteredResults := o.gatherResults(ctx, outCh)

	mc := o.newMetacache()