| /** |
| * 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.bookkeeper.proto; |
| |
| import org.apache.bookkeeper.client.BKException; |
| import org.apache.bookkeeper.proto.BookieProtocol.Request; |
| import org.apache.bookkeeper.stats.OpStatsLogger; |
| import org.apache.bookkeeper.util.MathUtils; |
| import org.jboss.netty.channel.Channel; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| abstract class PacketProcessorBase implements Runnable { |
| private final static Logger logger = LoggerFactory.getLogger(PacketProcessorBase.class); |
| final Request request; |
| final Channel channel; |
| final BookieRequestProcessor requestProcessor; |
| final long enqueueNanos; |
| |
| PacketProcessorBase(Request request, Channel channel, BookieRequestProcessor requestProcessor) { |
| this.request = request; |
| this.channel = channel; |
| this.requestProcessor = requestProcessor; |
| this.enqueueNanos = MathUtils.nowInNano(); |
| } |
| |
| protected boolean isVersionCompatible() { |
| byte version = request.getProtocolVersion(); |
| if (version < BookieProtocol.LOWEST_COMPAT_PROTOCOL_VERSION |
| || version > BookieProtocol.CURRENT_PROTOCOL_VERSION) { |
| logger.error("Invalid protocol version, expected something between " |
| + BookieProtocol.LOWEST_COMPAT_PROTOCOL_VERSION |
| + " & " + BookieProtocol.CURRENT_PROTOCOL_VERSION |
| + ". got " + request.getProtocolVersion()); |
| return false; |
| } |
| return true; |
| } |
| |
| protected void sendResponse(int rc, Object response, OpStatsLogger statsLogger) { |
| channel.write(response); |
| if (BookieProtocol.EOK == rc) { |
| statsLogger.registerSuccessfulEvent(MathUtils.elapsedMSec(enqueueNanos)); |
| } else { |
| statsLogger.registerFailedEvent(MathUtils.elapsedMSec(enqueueNanos)); |
| } |
| } |
| |
| @Override |
| public void run() { |
| if (!isVersionCompatible()) { |
| sendResponse(BookieProtocol.EBADVERSION, |
| ResponseBuilder.buildErrorResponse(BookieProtocol.EBADVERSION, request), |
| requestProcessor.readRequestStats); |
| return; |
| } |
| processPacket(); |
| } |
| |
| protected abstract void processPacket(); |
| } |