/* * 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 com.weiboyi.etl.flume.source.canal; import com.alibaba.otter.canal.client.CanalConnector; import com.alibaba.otter.canal.client.CanalConnectors; import com.alibaba.otter.canal.protocol.Message; import org.apache.commons.lang.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.net.InetSocketAddress; import java.net.SocketAddress; import java.util.List; public class CanalClient { private static final Logger LOGGER = LoggerFactory.getLogger(CanalClient.class); private CanalConnector canalConnector; private CanalConf canalConf; public CanalClient(CanalConf canalConf) throws ServerUrlsFormatException { this.canalConf = canalConf; if (StringUtils.isNotEmpty(canalConf.getZkServers())) { this.canalConnector = getConnector(canalConf.getZkServers(), canalConf.getDestination(), canalConf.getUsername(), canalConf.getPassword()); LOGGER.trace(String.format("Cluster connector has been created. Zookeeper servers are %s, destination is %s", canalConf.getZkServers(), canalConf.getDestination())); } else if (StringUtils.isNotEmpty(canalConf.getServerUrls())) { this.canalConnector = getConnector(CanalConf.convertUrlsToSocketAddressList(canalConf.getServerUrls()), canalConf.getDestination(), canalConf.getUsername(), canalConf.getPassword()); LOGGER.trace(String.format("Cluster connector has been created. Server urls are %s, destination is %s", canalConf.getServerUrls(), canalConf.getDestination())); } else if (StringUtils.isNotEmpty(canalConf.getServerUrl())) { this.canalConnector = getConnector(CanalConf.convertUrlToSocketAddress(canalConf.getServerUrl()), canalConf.getDestination(), canalConf.getUsername(), canalConf.getPassword()); } } public void start() { this.canalConnector.connect(); this.canalConnector.subscribe(); } public Message fetchRows() { return fetchRows(this.canalConf.getBatchSize()); } public Message fetchRows(int batchSize) { Message message = this.canalConnector.getWithoutAck(batchSize); long batchId = message.getId(); int size = message.getEntries().size(); if (batchId == -1 || size == 0) { // LOGGER.info("batch - {} 没有获取到数据", batchId); return null; } else { LOGGER.info("batch - {} data fetched successful, size is {}", batchId, size); return message; } } public void ack(long batchId) { this.canalConnector.ack(batchId); } public void rollback(long batchId) { this.canalConnector.rollback(batchId); } public void stop() { this.canalConnector.disconnect(); } private CanalConnector getConnector(String zkServers, String destination, String username, String password) { return CanalConnectors.newClusterConnector(zkServers, destination, username, password); } private CanalConnector getConnector(List<? extends SocketAddress> addresses, String destination, String username, String password) { return CanalConnectors.newClusterConnector(addresses, destination, username, password); } private CanalConnector getConnector(SocketAddress address, String destination, String username, String password) { return CanalConnectors.newSingleConnector(address, destination, username, password); } }