| /** |
| * |
| * 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 io.netty.channel.Channel; |
| import io.netty.channel.ChannelFuture; |
| import io.netty.channel.ChannelFutureListener; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.bookkeeper.proto.BookkeeperProtocol.BKPacketHeader; |
| import org.apache.bookkeeper.proto.BookkeeperProtocol.ProtocolVersion; |
| import org.apache.bookkeeper.proto.BookkeeperProtocol.Request; |
| import org.apache.bookkeeper.proto.BookkeeperProtocol.StatusCode; |
| import org.apache.bookkeeper.stats.OpStatsLogger; |
| import org.apache.bookkeeper.util.MathUtils; |
| import org.apache.bookkeeper.util.SafeRunnable; |
| import org.apache.bookkeeper.util.StringUtils; |
| |
| /** |
| * A base class for bookkeeper protocol v3 packet processors. |
| */ |
| public abstract class PacketProcessorBaseV3 extends SafeRunnable { |
| |
| final Request request; |
| final Channel channel; |
| final BookieRequestProcessor requestProcessor; |
| final long enqueueNanos; |
| |
| public PacketProcessorBaseV3(Request request, Channel channel, |
| BookieRequestProcessor requestProcessor) { |
| this.request = request; |
| this.channel = channel; |
| this.requestProcessor = requestProcessor; |
| this.enqueueNanos = MathUtils.nowInNano(); |
| } |
| |
| protected void sendResponse(StatusCode code, Object response, OpStatsLogger statsLogger) { |
| final long writeNanos = MathUtils.nowInNano(); |
| |
| final long timeOut = requestProcessor.getWaitTimeoutOnBackpressureMillis(); |
| if (timeOut >= 0 && !channel.isWritable()) { |
| if (!requestProcessor.isBlacklisted(channel)) { |
| synchronized (channel) { |
| if (!channel.isWritable() && !requestProcessor.isBlacklisted(channel)) { |
| final long waitUntilNanos = writeNanos + TimeUnit.MILLISECONDS.toNanos(timeOut); |
| while (!channel.isWritable() && MathUtils.nowInNano() < waitUntilNanos) { |
| try { |
| TimeUnit.MILLISECONDS.sleep(1); |
| } catch (InterruptedException e) { |
| break; |
| } |
| } |
| if (!channel.isWritable()) { |
| requestProcessor.blacklistChannel(channel); |
| requestProcessor.handleNonWritableChannel(channel); |
| } |
| } |
| } |
| } |
| |
| if (!channel.isWritable()) { |
| LOGGER.warn("cannot write response to non-writable channel {} for request {}", channel, |
| StringUtils.requestToString(request)); |
| requestProcessor.getRequestStats().getChannelWriteStats() |
| .registerFailedEvent(MathUtils.elapsedNanos(writeNanos), TimeUnit.NANOSECONDS); |
| statsLogger.registerFailedEvent(MathUtils.elapsedNanos(enqueueNanos), TimeUnit.NANOSECONDS); |
| return; |
| } else { |
| requestProcessor.invalidateBlacklist(channel); |
| } |
| } |
| |
| channel.writeAndFlush(response).addListener(new ChannelFutureListener() { |
| @Override |
| public void operationComplete(ChannelFuture future) throws Exception { |
| long writeElapsedNanos = MathUtils.elapsedNanos(writeNanos); |
| if (!future.isSuccess()) { |
| requestProcessor.getRequestStats().getChannelWriteStats() |
| .registerFailedEvent(writeElapsedNanos, TimeUnit.NANOSECONDS); |
| } else { |
| requestProcessor.getRequestStats().getChannelWriteStats() |
| .registerSuccessfulEvent(writeElapsedNanos, TimeUnit.NANOSECONDS); |
| } |
| if (StatusCode.EOK == code) { |
| statsLogger.registerSuccessfulEvent(MathUtils.elapsedNanos(enqueueNanos), TimeUnit.NANOSECONDS); |
| } else { |
| statsLogger.registerFailedEvent(MathUtils.elapsedNanos(enqueueNanos), TimeUnit.NANOSECONDS); |
| } |
| } |
| }); |
| } |
| |
| protected boolean isVersionCompatible() { |
| return this.request.getHeader().getVersion().equals(ProtocolVersion.VERSION_THREE); |
| } |
| |
| /** |
| * Build a header with protocol version 3 and the operation type same as what was in the |
| * request. |
| * @return |
| */ |
| protected BKPacketHeader getHeader() { |
| BKPacketHeader.Builder header = BKPacketHeader.newBuilder(); |
| header.setVersion(ProtocolVersion.VERSION_THREE); |
| header.setOperation(request.getHeader().getOperation()); |
| header.setTxnId(request.getHeader().getTxnId()); |
| return header.build(); |
| } |
| |
| @Override |
| public String toString() { |
| return request.toString(); |
| } |
| } |