Canal实时同步MySQL数据到ES

Canal是阿里巴巴开源的基于MySQL数据库增量日志解析的开源工具，它的设计目的是提供低延迟的数据变更监测服务。以下是一个简单的例子，展示如何使用Canal将MySQL数据同步到Elasticsearch。

首先，确保你已经部署了Canal和Elasticsearch，并且配置了Canal来监听MySQL的binlog。

然后，你可以使用以下代码示例作为数据同步的基础：

import com.alibaba.otter.canal.client.CanalConnector;
import com.alibaba.otter.canal.client.CanalConnectors;
import com.alibaba.otter.canal.protocol.Message;
import com.alibaba.otter.canal.protocol.CanalEntry;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.common.xcontent.XContentType;
 
public class MySQLToESSync {
 
    public static void main(String args[]) {
        // 创建连接
        CanalConnector connector = CanalConnectors.newSingleConnector(
                new InetSocketAddress(AddressUtils.getHostIp(),
                11111), "example", "", "");
 
        // 启动连接
        connector.connect();
        connector.subscribe(".*\\..*");
        connector.rollback();
        try {
            while (true) {
                // 获取指定数量的数据
                Message message = connector.getWithoutAck(100);
                long batchId = message.getId();
                if (batchId == -1 || message.getEntries().isEmpty()) {
                    Thread.sleep(1000);
                } else {
                    dataHandle(message, esClient);
                    connector.ack(batchId); // 确认消息
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            connector.disconnect();
        }
    }
 
    private static void dataHandle(Message message, RestHighLevelClient esClient) throws Exception {
        for (CanalEntry.Entry entry : message.getEntries()) {
            if (entry.getEntryType() == CanalEntry.EntryType.TRANSACTIONBEGIN || entry.getEntryType() == CanalEntry.EntryType.TRANSACTIONEND) {
                continue;
            }
            CanalEntry.RowChange rowChange = CanalEntry.RowChange.parseFrom(entry.getStoreValue());
            for (CanalEntry.RowData rowData : rowChange.getRowDatasList()) {
                if (rowChange.getEventType() == CanalEntry.EventType.DELETE) {
                    // 处理删除事件
                } else if (rowChange.getEventType() == CanalEntry.EventType.INSERT) {
                    // 处理插入事件
                    IndexRequest request =