| /* |
| * 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.db.protocol.client; |
| |
| import org.apache.iotdb.common.rpc.thrift.TEndPoint; |
| import org.apache.iotdb.commons.consensus.ConfigRegionId; |
| import org.apache.iotdb.commons.exception.BadNodeUrlException; |
| import org.apache.iotdb.commons.file.SystemFileFactory; |
| import org.apache.iotdb.commons.utils.FileUtils; |
| import org.apache.iotdb.commons.utils.NodeUrlUtils; |
| import org.apache.iotdb.db.conf.IoTDBDescriptor; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.io.OutputStreamWriter; |
| import java.nio.charset.StandardCharsets; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Properties; |
| import java.util.Set; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| |
| public class ConfigNodeInfo { |
| |
| private static final Logger logger = LoggerFactory.getLogger(ConfigNodeInfo.class); |
| |
| private static final String CONFIG_NODE_LIST = "config_node_list"; |
| |
| private static final String PROPERTIES_FILE_NAME = "system.properties"; |
| |
| private final ReentrantReadWriteLock configNodeInfoReadWriteLock; |
| |
| /** latest config nodes. */ |
| private final Set<TEndPoint> onlineConfigNodes; |
| |
| public static final ConfigRegionId CONFIG_REGION_ID = new ConfigRegionId(0); |
| |
| private final File propertiesFile; |
| private final File propertiesFileTmp; |
| |
| private ConfigNodeInfo() { |
| this.configNodeInfoReadWriteLock = new ReentrantReadWriteLock(); |
| this.onlineConfigNodes = new HashSet<>(); |
| propertiesFile = |
| SystemFileFactory.INSTANCE.getFile( |
| IoTDBDescriptor.getInstance().getConfig().getSystemDir() |
| + File.separator |
| + PROPERTIES_FILE_NAME); |
| propertiesFileTmp = |
| SystemFileFactory.INSTANCE.getFile(propertiesFile.getAbsolutePath() + ".tmp"); |
| if (propertiesFileTmp.exists()) { |
| try { |
| updatePropertiesFile(); |
| } catch (IOException e) { |
| logger.error("Update properties file fail", e); |
| } |
| } |
| } |
| |
| // TODO: This needs removal of statics ... |
| public static void reinitializeStatics() { |
| ConfigNodeInfoHolder.INSTANCE = new ConfigNodeInfo(); |
| } |
| |
| /** Update ConfigNodeList both in memory and system.properties file */ |
| public boolean updateConfigNodeList(List<TEndPoint> latestConfigNodes) { |
| long startTime = System.currentTimeMillis(); |
| // Check whether the config nodes are latest or not |
| configNodeInfoReadWriteLock.readLock().lock(); |
| try { |
| if (onlineConfigNodes.size() == latestConfigNodes.size() |
| && onlineConfigNodes.containsAll(latestConfigNodes)) { |
| return true; |
| } |
| } finally { |
| configNodeInfoReadWriteLock.readLock().unlock(); |
| } |
| |
| // Update config nodes |
| configNodeInfoReadWriteLock.writeLock().lock(); |
| try { |
| onlineConfigNodes.clear(); |
| onlineConfigNodes.addAll(latestConfigNodes); |
| storeConfigNode(); |
| long endTime = System.currentTimeMillis(); |
| logger.info( |
| "Update ConfigNode Successfully: {}, which takes {} ms.", |
| onlineConfigNodes, |
| (endTime - startTime)); |
| } catch (IOException e) { |
| logger.error("Update ConfigNode failed.", e); |
| return false; |
| } finally { |
| configNodeInfoReadWriteLock.writeLock().unlock(); |
| } |
| return true; |
| } |
| |
| /** |
| * Call this method to store config node list. |
| * |
| * @throws IOException if properties deserialization or configNode list serialization failed. |
| */ |
| private void storeConfigNode() throws IOException { |
| Properties properties = new Properties(); |
| try (FileInputStream inputStream = new FileInputStream(propertiesFile)) { |
| properties.load(new InputStreamReader(inputStream, StandardCharsets.UTF_8)); |
| } |
| properties.setProperty( |
| CONFIG_NODE_LIST, NodeUrlUtils.convertTEndPointUrls(new ArrayList<>(onlineConfigNodes))); |
| try (FileOutputStream fileOutputStream = new FileOutputStream(propertiesFileTmp)) { |
| properties.store(new OutputStreamWriter(fileOutputStream, StandardCharsets.UTF_8), ""); |
| } |
| updatePropertiesFile(); |
| } |
| |
| private void updatePropertiesFile() throws IOException { |
| if (!propertiesFile.delete()) { |
| String msg = |
| String.format( |
| "Update %s file fail: %s", PROPERTIES_FILE_NAME, propertiesFile.getAbsoluteFile()); |
| throw new IOException(msg); |
| } |
| FileUtils.moveFileSafe(propertiesFileTmp, propertiesFile); |
| } |
| |
| public void loadConfigNodeList() { |
| long startTime = System.currentTimeMillis(); |
| // properties contain CONFIG_NODE_LIST only when start as Data node |
| try { |
| configNodeInfoReadWriteLock.writeLock().lock(); |
| Properties properties = new Properties(); |
| try (FileInputStream inputStream = new FileInputStream(propertiesFile)) { |
| properties.load(new InputStreamReader(inputStream, StandardCharsets.UTF_8)); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| |
| if (properties.containsKey(CONFIG_NODE_LIST)) { |
| onlineConfigNodes.clear(); |
| onlineConfigNodes.addAll( |
| NodeUrlUtils.parseTEndPointUrls(properties.getProperty(CONFIG_NODE_LIST))); |
| } |
| long endTime = System.currentTimeMillis(); |
| logger.info( |
| "Load ConfigNode successfully: {}, which takes {} ms.", |
| onlineConfigNodes, |
| (endTime - startTime)); |
| } catch (BadNodeUrlException e) { |
| logger.error("Cannot parse config node list in system.properties"); |
| } finally { |
| configNodeInfoReadWriteLock.writeLock().unlock(); |
| } |
| } |
| |
| public List<TEndPoint> getLatestConfigNodes() { |
| List<TEndPoint> result; |
| configNodeInfoReadWriteLock.readLock().lock(); |
| try { |
| result = new ArrayList<>(onlineConfigNodes); |
| } finally { |
| configNodeInfoReadWriteLock.readLock().unlock(); |
| } |
| return result; |
| } |
| |
| private static class ConfigNodeInfoHolder { |
| private static ConfigNodeInfo INSTANCE = new ConfigNodeInfo(); |
| |
| private ConfigNodeInfoHolder() { |
| // Empty constructor |
| } |
| } |
| |
| public static ConfigNodeInfo getInstance() { |
| return ConfigNodeInfoHolder.INSTANCE; |
| } |
| } |