| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cassandra.net; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.tracing.Tracing; |
| |
| public class ResponseVerbHandler implements IVerbHandler |
| { |
| private static final Logger logger = LoggerFactory.getLogger( ResponseVerbHandler.class ); |
| |
| public void doVerb(MessageIn message, int id) |
| { |
| long latency = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - MessagingService.instance().getRegisteredCallbackAge(id)); |
| CallbackInfo callbackInfo = MessagingService.instance().removeRegisteredCallback(id); |
| if (callbackInfo == null) |
| { |
| String msg = "Callback already removed for {} (from {})"; |
| logger.trace(msg, id, message.from); |
| Tracing.trace(msg, id, message.from); |
| return; |
| } |
| |
| Tracing.trace("Processing response from {}", message.from); |
| IAsyncCallback cb = callbackInfo.callback; |
| if (message.isFailureResponse()) |
| { |
| ((IAsyncCallbackWithFailure) cb).onFailure(message.from, message.getFailureReason()); |
| } |
| else |
| { |
| //TODO: Should we add latency only in success cases? |
| MessagingService.instance().maybeAddLatency(cb, message.from, latency); |
| cb.response(message); |
| } |
| |
| if (callbackInfo.callback.supportsBackPressure()) |
| { |
| MessagingService.instance().updateBackPressureOnReceive(message.from, cb, false); |
| } |
| } |
| } |