@Override
public void messageReceived(Request request, final TransportChannel channel) throws Exception {
// we just send back a response, no need to fork a listener
request.listenerThreaded(false);
// we don't spawn, so if we get a request with no threading, change it to single threaded
if (request.operationThreading() == BroadcastOperationThreading.NO_THREADS) {
request.operationThreading(BroadcastOperationThreading.SINGLE_THREAD);
}
execute(
request,
new ActionListener<Response>() {
@Override
public void onResponse(Response response) {
try {
channel.sendResponse(response);
} catch (Throwable e) {
onFailure(e);
}
}
@Override
public void onFailure(Throwable e) {
try {
channel.sendResponse(e);
} catch (Exception e1) {
logger.warn("Failed to send response", e1);
}
}
});
}
public void start() {
if (shardsIts.size() == 0) {
// no shards
try {
listener.onResponse(newResponse(request, new AtomicReferenceArray(0), clusterState));
} catch (Throwable e) {
listener.onFailure(e);
}
}
request.beforeStart();
// count the local operations, and perform the non local ones
int localOperations = 0;
int shardIndex = -1;
for (final ShardIterator shardIt : shardsIts) {
shardIndex++;
final ShardRouting shard = shardIt.firstOrNull();
if (shard != null) {
if (shard.currentNodeId().equals(nodes.localNodeId())) {
localOperations++;
} else {
// do the remote operation here, the localAsync flag is not relevant
performOperation(shardIt, shardIndex, true);
}
} else {
// really, no shards active in this group
onOperation(
null, shardIt, shardIndex, new NoShardAvailableActionException(shardIt.shardId()));
}
}
// we have local operations, perform them now
if (localOperations > 0) {
if (request.operationThreading() == BroadcastOperationThreading.SINGLE_THREAD) {
request.beforeLocalFork();
threadPool
.executor(executor)
.execute(
new Runnable() {
@Override
public void run() {
int shardIndex = -1;
for (final ShardIterator shardIt : shardsIts) {
shardIndex++;
final ShardRouting shard = shardIt.firstOrNull();
if (shard != null) {
if (shard.currentNodeId().equals(nodes.localNodeId())) {
performOperation(shardIt, shardIndex, false);
}
}
}
}
});
} else {
boolean localAsync =
request.operationThreading() == BroadcastOperationThreading.THREAD_PER_SHARD;
if (localAsync) {
request.beforeLocalFork();
}
shardIndex = -1;
for (final ShardIterator shardIt : shardsIts) {
shardIndex++;
final ShardRouting shard = shardIt.firstOrNull();
if (shard != null) {
if (shard.currentNodeId().equals(nodes.localNodeId())) {
performOperation(shardIt, shardIndex, localAsync);
}
}
}
}
}
}