| /* |
| * 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.common.store; |
| |
| import com.alibaba.fastjson.JSON; |
| import io.openmessaging.connector.api.data.Converter; |
| import org.apache.rocketmq.eventbridge.adapter.runtime.common.FileAndPropertyUtil; |
| import org.apache.rocketmq.eventbridge.adapter.runtime.common.LoggerName; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.Base64; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * File based Key value store. |
| * |
| * @param <K> |
| * @param <V> |
| */ |
| public class FileBaseKeyValueStore<K, V> extends MemoryBasedKeyValueStore<K, V> { |
| |
| private static final Logger log = LoggerFactory.getLogger(LoggerName.EVENT_BRIDGE_RUNTIMER); |
| |
| private String configFilePath; |
| private Converter keyConverter; |
| private Converter valueConverter; |
| |
| public FileBaseKeyValueStore(String configFilePath, |
| Converter keyConverter, |
| Converter valueConverter) { |
| |
| super(); |
| this.configFilePath = configFilePath; |
| this.keyConverter = keyConverter; |
| this.valueConverter = valueConverter; |
| } |
| |
| public String encode() { |
| |
| Map<String, String> map = new HashMap<>(); |
| for (K key : data.keySet()) { |
| byte[] keyByte = keyConverter.objectToByte(key); |
| byte[] valueByte = valueConverter.objectToByte(data.get(key)); |
| map.put(Base64.getEncoder().encodeToString(keyByte), Base64.getEncoder().encodeToString(valueByte)); |
| } |
| return JSON.toJSONString(map); |
| } |
| |
| public void decode(String jsonString) { |
| |
| Map<K, V> resultMap = new HashMap<>(); |
| Map<String, String> map = JSON.parseObject(jsonString, Map.class); |
| for (String key : map.keySet()) { |
| K decodeKey = (K) keyConverter.byteToObject(Base64.getDecoder().decode(key)); |
| V decodeValue = (V) valueConverter.byteToObject(Base64.getDecoder().decode(map.get(key))); |
| resultMap.put(decodeKey, decodeValue); |
| } |
| this.data = resultMap; |
| } |
| |
| @Override |
| public boolean load() { |
| String fileName = null; |
| try { |
| fileName = this.configFilePath; |
| String jsonString = FileAndPropertyUtil.file2String(fileName); |
| |
| if (null == jsonString || jsonString.length() == 0) { |
| return this.loadBak(); |
| } else { |
| this.decode(jsonString); |
| log.info("load " + fileName + " OK"); |
| return true; |
| } |
| } catch (Exception e) { |
| log.error("load " + fileName + " failed, and try to load backup file", e); |
| return this.loadBak(); |
| } |
| } |
| |
| private boolean loadBak() { |
| String fileName = null; |
| try { |
| fileName = this.configFilePath; |
| String jsonString = FileAndPropertyUtil.file2String(fileName + ".bak"); |
| if (jsonString != null && jsonString.length() > 0) { |
| this.decode(jsonString); |
| log.info("load " + fileName + " OK"); |
| return true; |
| } |
| } catch (Exception e) { |
| log.error("load " + fileName + " Failed", e); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public void persist() { |
| |
| String jsonString = this.encode(); |
| if (jsonString != null) { |
| String fileName = this.configFilePath; |
| try { |
| FileAndPropertyUtil.string2File(jsonString, fileName); |
| } catch (IOException e) { |
| log.error("persist file " + fileName + " exception", e); |
| } |
| } |
| } |
| } |