| /* |
| * 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.rocketmq.eventbridge.adapter.runtime.service; |
| |
| import com.google.common.reflect.TypeToken; |
| import com.google.gson.Gson; |
| import java.io.File; |
| import java.io.IOException; |
| import java.lang.reflect.Type; |
| import java.nio.file.FileSystems; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.nio.file.StandardWatchEventKinds; |
| import java.nio.file.WatchKey; |
| import java.nio.file.WatchService; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| import lombok.extern.slf4j.Slf4j; |
| import org.apache.commons.io.FileUtils; |
| import org.apache.rocketmq.common.utils.ThreadUtils; |
| import org.apache.rocketmq.eventbridge.adapter.runtime.common.entity.TargetRunnerConfig; |
| import org.apache.rocketmq.eventbridge.exception.EventBridgeException; |
| import org.springframework.stereotype.Component; |
| |
| @Slf4j |
| //@Component |
| public class TargetRunnerConfigOnFileObserver extends AbstractTargetRunnerConfigObserver { |
| |
| private String pathName; |
| |
| public static final String DEFAULT_TARGET_RUNNER_CONFIG_FILE_NAME = "target-runner.json"; |
| |
| private static ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor( |
| ThreadUtils.newThreadFactory("TargetRunnerConfigOnFileObserver", false)); |
| |
| public TargetRunnerConfigOnFileObserver(String pathName) { |
| this.pathName = pathName; |
| super.getTargetRunnerConfig().addAll(getLatestTargetRunnerConfig()); |
| this.addListen(pathName, this); |
| } |
| |
| public TargetRunnerConfigOnFileObserver() { |
| this.pathName = getConfigFilePath(); |
| super.getTargetRunnerConfig().addAll(getLatestTargetRunnerConfig()); |
| this.addListen(pathName, this); |
| } |
| |
| @Override |
| public Set<TargetRunnerConfig> getLatestTargetRunnerConfig() { |
| String config = null; |
| try { |
| File file = new File(pathName); |
| config = FileUtils.readFileToString(file, "UTF-8"); |
| Type workerConfigType = new TypeToken<HashSet<TargetRunnerConfig>>() {}.getType(); |
| Set<TargetRunnerConfig> taskConfigList = new Gson().fromJson(config, workerConfigType); |
| return taskConfigList; |
| } catch (IOException e) { |
| throw new EventBridgeException("Load component properties failed.", e); |
| } catch (Throwable e) { |
| log.error("fail to parse config={} from file={}", config, pathName); |
| throw e; |
| } |
| } |
| |
| public void addListen(String pathName, TargetRunnerConfigOnFileObserver pusherConfigOnFileService) { |
| log.info("Watching task file changing:{}", pathName); |
| int index = pathName.lastIndexOf("/"); |
| String filePath = pathName.substring(0, index); |
| String fileName = pathName.substring(index + 1); |
| service.scheduleAtFixedRate(() -> { |
| try { |
| WatchService watchService = FileSystems.getDefault().newWatchService(); |
| Path path = Paths.get(filePath); |
| path.register(watchService, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_DELETE, |
| StandardWatchEventKinds.ENTRY_MODIFY); |
| WatchKey watchKey; |
| while (true) { |
| watchKey = watchService.take(); |
| if (watchKey != null && !watchKey.pollEvents() |
| .isEmpty()) { |
| log.info("Watched the file changed events."); |
| pusherConfigOnFileService.diff(); |
| } |
| watchKey.reset(); |
| } |
| } catch (Throwable e) { |
| log.error("Watch file failed.", e); |
| } |
| }, 0, 3, TimeUnit.SECONDS); |
| } |
| |
| |
| private String getConfigFilePath() { |
| return this.getClass().getClassLoader().getResource(DEFAULT_TARGET_RUNNER_CONFIG_FILE_NAME).getPath(); |
| } |
| |
| } |