private void listenDriveState(FlowletRuntimeService driver) {
driver.addListener(
new ServiceListenerAdapter() {
@Override
public void running() {
started();
}
@Override
public void failed(Service.State from, Throwable failure) {
LOG.error("Flowlet terminated with exception", failure);
error(failure);
}
@Override
public void terminated(Service.State from) {
if (getState() != State.STOPPING) {
LOG.warn("Flowlet terminated by itself");
// Close all consumers
for (ConsumerSupplier consumerSupplier : consumerSuppliers) {
Closeables.closeQuietly(consumerSupplier);
}
}
}
},
Threads.SAME_THREAD_EXECUTOR);
}
@Override
protected void doStop() throws Exception {
LOG.info("Stopping flowlet: " + flowletContext);
try {
driver.stopAndWait();
} finally {
// Close all consumers
for (ConsumerSupplier consumerSupplier : consumerSuppliers) {
Closeables.closeQuietly(consumerSupplier);
}
flowletContext.close();
}
LOG.info("Flowlet stopped: " + flowletContext);
}
@Override
protected void doResume() throws Exception {
LOG.info("Resuming flowlet: " + flowletContext);
// Open producers
for (ProducerSupplier producerSupplier : producerSuppliers) {
producerSupplier.open();
}
// Open consumers
for (ConsumerSupplier consumerSupplier : consumerSuppliers) {
consumerSupplier.open(flowletContext.getInstanceCount());
}
driver.resume();
LOG.info("Flowlet resumed: " + flowletContext);
}
@Override
protected void doSuspend() throws Exception {
LOG.info("Suspending flowlet: " + flowletContext);
driver.suspend();
// Close all producers
for (ProducerSupplier producerSupplier : producerSuppliers) {
producerSupplier.close();
}
// Close all consumers
for (ConsumerSupplier consumerSupplier : consumerSuppliers) {
consumerSupplier.close();
}
LOG.info("Flowlet suspended: " + flowletContext);
}
