// Start WhoFlow
FlowManager flowManager = appManager.startFlow("WhoFlow");
// Send stream events to the "who" Stream
StreamWriter streamWriter = appManager.getStreamWriter("who");
streamWriter.send("1");
streamWriter.send("2");
streamWriter.send("3");
streamWriter.send("4");
streamWriter.send("5");
try {
// Wait for the last Flowlet processing 5 events, or at most 5 seconds
RuntimeMetrics metrics = RuntimeStats.getFlowletMetrics("HelloWorld", "WhoFlow", "saver");
metrics.waitForProcessed(5, 5, TimeUnit.SECONDS);