public void onReceived(
Executor executor,
final String path,
final int version,
final String id,
final Message message) {
if (callback == null) {
// Simply delete the message
if (LOG.isDebugEnabled()) {
LOG.debug("Ignoring incoming message from " + path + ": " + message);
}
listenFailure(zkClient.delete(path, version));
return;
}
executor.execute(
new Runnable() {
@Override
public void run() {
try {
// Message process is synchronous for now. Making it async needs more thoughts about
// race conditions.
// The executor is the callbackExecutor which is a single thread executor.
callback.onReceived(id, message).get();
} catch (Throwable t) {
LOG.error("Exception when processing message: {}, {}, {}", id, message, path, t);
} finally {
listenFailure(zkClient.delete(path, version));
}
}
});
}
private OperationFuture<String> removeLiveNode() {
String liveNode = getLiveNodePath();
LOG.info("Remove live node " + liveNode);
return ZKOperations.ignoreError(
zkClient.delete(liveNode), KeeperException.NoNodeException.class, liveNode);
}