| /* |
| * 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.iotdb.commons.sync.persistence; |
| |
| import org.apache.iotdb.commons.sync.pipe.PipeInfo; |
| import org.apache.iotdb.commons.sync.pipe.SyncOperation; |
| import org.apache.iotdb.commons.sync.pipesink.PipeSink; |
| import org.apache.iotdb.commons.sync.utils.SyncConstant; |
| import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| public class SyncLogReader { |
| private static final Logger logger = LoggerFactory.getLogger(SyncLogReader.class); |
| // <pipeSinkName, PipeSink> |
| private final Map<String, PipeSink> pipeSinks = new ConcurrentHashMap<>(); |
| private final Map<String, Map<Long, PipeInfo>> pipes = new ConcurrentHashMap<>(); |
| private PipeInfo runningPipe; |
| private final File dir; |
| private final String fileName; |
| |
| public SyncLogReader(File dir) { |
| this.dir = dir; |
| this.fileName = SyncConstant.SYNC_LOG_NAME; |
| } |
| |
| public SyncLogReader(File dir, String fileName) { |
| this.dir = dir; |
| this.fileName = fileName; |
| } |
| |
| public void recover() throws IOException { |
| logger.info("Start to recover all sync state for sync."); |
| File serviceLogFile = new File(dir, fileName); |
| if (!serviceLogFile.exists()) { |
| logger.warn("Sync service log file not found"); |
| } else { |
| try (InputStream inputStream = new FileInputStream(serviceLogFile)) { |
| recoverPipe(inputStream); |
| } |
| } |
| } |
| |
| public Map<String, PipeSink> getAllPipeSinks() { |
| return pipeSinks; |
| } |
| |
| public Map<String, Map<Long, PipeInfo>> getAllPipeInfos() { |
| return pipes; |
| } |
| |
| public PipeInfo getRunningPipeInfo() { |
| return runningPipe; |
| } |
| |
| private void recoverPipe(InputStream inputStream) throws IOException { |
| byte nextByte; |
| while ((nextByte = ReadWriteIOUtils.readByte(inputStream)) != -1) { |
| SyncOperation operationType = SyncOperation.values()[nextByte]; |
| switch (operationType) { |
| case CREATE_PIPESINK: |
| PipeSink pipeSink = PipeSink.deserializePipeSink(inputStream); |
| pipeSinks.put(pipeSink.getPipeSinkName(), pipeSink); |
| break; |
| case DROP_PIPESINK: |
| pipeSinks.remove(ReadWriteIOUtils.readString(inputStream)); |
| break; |
| case CREATE_PIPE: |
| runningPipe = PipeInfo.deserializePipeInfo(inputStream); |
| pipes |
| .computeIfAbsent(runningPipe.getPipeName(), i -> new ConcurrentHashMap<>()) |
| .computeIfAbsent(runningPipe.getCreateTime(), i -> runningPipe); |
| break; |
| case STOP_PIPE: |
| // TODO: support multiple pipe |
| ReadWriteIOUtils.readString(inputStream); |
| runningPipe.stop(); |
| break; |
| case START_PIPE: |
| // TODO: support multiple pipe |
| ReadWriteIOUtils.readString(inputStream); |
| runningPipe.start(); |
| break; |
| case DROP_PIPE: |
| // TODO: support multiple pipe |
| ReadWriteIOUtils.readString(inputStream); |
| runningPipe.drop(); |
| break; |
| default: |
| throw new UnsupportedOperationException( |
| String.format("Can not recognize SyncOperation %s.", operationType.name())); |
| } |
| } |
| } |
| } |