@Override
public void message(final int sequenceNo, Message message) {
final String messageName = "/" + message.getClass().getSimpleName();
final Timer profilingTimer = Timing.startRequest(messageName);
if (message instanceof Rpc.CancelRpc) {
final ServerRpcController controller = activeRpcs.get(sequenceNo);
if (controller == null) {
throw new IllegalStateException("Trying to cancel an RPC that is not active!");
} else {
LOG.info("Cancelling open RPC " + sequenceNo);
controller.cancel();
}
} else if (message instanceof ProtocolAuthenticate) {
// Workaround for bug: http://codereview.waveprotocol.org/224001/
// When we get this message, either the connection will not be logged in
// (loggedInUser == null) or the connection will have been authenticated
// via cookies
// (in which case loggedInUser must match the authenticated user, and
// this message has no
// effect).
ProtocolAuthenticate authMessage = (ProtocolAuthenticate) message;
ParticipantId authenticatedAs = authenticate(authMessage.getToken());
Preconditions.checkArgument(authenticatedAs != null, "Auth token invalid");
Preconditions.checkState(
loggedInUser == null || loggedInUser.equals(authenticatedAs),
"Session already authenticated as a different user");
loggedInUser = authenticatedAs;
LOG.info("Session authenticated as " + loggedInUser);
sendMessage(sequenceNo, ProtocolAuthenticationResult.getDefaultInstance());
} else if (provider.registeredServices.containsKey(message.getDescriptorForType())) {
if (activeRpcs.containsKey(sequenceNo)) {
throw new IllegalStateException(
"Can't invoke a new RPC with a sequence number already in use.");
} else {
final RegisteredServiceMethod serviceMethod =
provider.registeredServices.get(message.getDescriptorForType());
// Create the internal ServerRpcController used to invoke the call.
final ServerRpcController controller =
new ServerRpcControllerImpl(
message,
serviceMethod.service,
serviceMethod.method,
loggedInUser,
new RpcCallback<Message>() {
@Override
public synchronized void run(Message message) {
if (message instanceof Rpc.RpcFinished
|| !serviceMethod.method.getOptions().getExtension(Rpc.isStreamingRpc)) {
// This RPC is over - remove it from the map.
boolean failed =
message instanceof Rpc.RpcFinished
? ((Rpc.RpcFinished) message).getFailed()
: false;
LOG.fine("RPC " + sequenceNo + " is now finished, failed = " + failed);
if (failed) {
LOG.info("error = " + ((Rpc.RpcFinished) message).getErrorText());
}
activeRpcs.remove(sequenceNo);
}
sendMessage(sequenceNo, message);
if (profilingTimer != null) {
Timing.stop(profilingTimer);
}
}
});
// Kick off a new thread specific to this RPC.
activeRpcs.put(sequenceNo, controller);
provider.threadPool.execute(controller);
}
} else {
// Sent a message type we understand, but don't expect - erronous case!
throw new IllegalStateException(
"Got expected but unknown message (" + message + ") for sequence: " + sequenceNo);
}
}
@Override
public Integer apply(Pair<RequestHeader, Message> headerAndParam) {
RequestHeader header = headerAndParam.getFirst();
String methodName = header.getMethodName();
Integer priorityByAnnotation = annotatedQos.get(methodName);
if (priorityByAnnotation != null) {
return priorityByAnnotation;
}
Message param = headerAndParam.getSecond();
if (param == null) {
return HConstants.NORMAL_QOS;
}
if (methodName.equalsIgnoreCase("multi") && param instanceof MultiRequest) {
// The multi call has its priority set in the header. All calls should work this way but
// only this one has been converted so far. No priority == NORMAL_QOS.
return header.hasPriority() ? header.getPriority() : HConstants.NORMAL_QOS;
}
String cls = param.getClass().getName();
Class<? extends Message> rpcArgClass = argumentToClassMap.get(cls);
RegionSpecifier regionSpecifier = null;
// check whether the request has reference to meta region or now.
try {
// Check if the param has a region specifier; the pb methods are hasRegion and getRegion if
// hasRegion returns true. Not all listed methods have region specifier each time. For
// example, the ScanRequest has it on setup but thereafter relies on the scannerid rather than
// send the region over every time.
Method hasRegion = methodMap.get("hasRegion").get(rpcArgClass);
if (hasRegion != null && (Boolean) hasRegion.invoke(param, (Object[]) null)) {
Method getRegion = methodMap.get("getRegion").get(rpcArgClass);
regionSpecifier = (RegionSpecifier) getRegion.invoke(param, (Object[]) null);
HRegion region = hRegionServer.getRegion(regionSpecifier);
if (region.getRegionInfo().isMetaTable()) {
if (LOG.isTraceEnabled()) {
LOG.trace("High priority because region=" + region.getRegionNameAsString());
}
return HConstants.HIGH_QOS;
}
}
} catch (Exception ex) {
// Not good throwing an exception out of here, a runtime anyways. Let the query go into the
// server and have it throw the exception if still an issue. Just mark it normal priority.
if (LOG.isTraceEnabled()) LOG.trace("Marking normal priority after getting exception=" + ex);
return HConstants.NORMAL_QOS;
}
if (methodName.equals("scan")) { // scanner methods...
ScanRequest request = (ScanRequest) param;
if (!request.hasScannerId()) {
return HConstants.NORMAL_QOS;
}
RegionScanner scanner = hRegionServer.getScanner(request.getScannerId());
if (scanner != null && scanner.getRegionInfo().isMetaRegion()) {
if (LOG.isTraceEnabled()) {
// Scanner requests are small in size so TextFormat version should not overwhelm log.
LOG.trace("High priority scanner request " + TextFormat.shortDebugString(request));
}
return HConstants.HIGH_QOS;
}
}
return HConstants.NORMAL_QOS;
}
public static Short getDescriptor(Message message) {
return typeDescriptorMap.get(message.getClass());
}