canal 入门（2）

写个简单的Demo 去监听mysql 数据的变动

Jar包

<dependency><groupId>com.alibaba.otter</groupId><artifactId>canal.client</artifactId><version>1.1.3</version>
</dependency>

测试代码

package com.hq.eos.sync.client;import java.net.InetSocketAddress;
import java.util.List;import com.alibaba.otter.canal.client.CanalConnector;
import com.alibaba.otter.canal.client.CanalConnectors;
import com.alibaba.otter.canal.protocol.CanalEntry.Column;
import com.alibaba.otter.canal.protocol.CanalEntry.Entry;
import com.alibaba.otter.canal.protocol.CanalEntry.EntryType;
import com.alibaba.otter.canal.protocol.CanalEntry.EventType;
import com.alibaba.otter.canal.protocol.CanalEntry.RowChange;
import com.alibaba.otter.canal.protocol.CanalEntry.RowData;
import com.alibaba.otter.canal.protocol.Message;public class CanalTest {public static void main(String[] args) throws Exception {CanalConnector connector = CanalConnectors.newSingleConnector(new InetSocketAddress("10.0.98.186", 11111), "expert", "root", "root");connector.connect();connector.subscribe(".*\\..*");connector.rollback();while (true) {Message message = connector.getWithoutAck(100); // 获取指定数量的数据long batchId = message.getId();if (batchId == -1 || message.getEntries().isEmpty()) {Thread.sleep(1000);continue;}// System.out.println(message.getEntries());printEntries(message.getEntries());connector.ack(batchId);// 提交确认，消费成功，通知server删除数据
// connector.rollback(batchId);// 处理失败, 回滚数据，后续重新获取数据}}private static void printEntries(List<Entry> entries) throws Exception {for (Entry entry : entries) {if (entry.getEntryType() != EntryType.ROWDATA) {continue;}RowChange rowChange = RowChange.parseFrom(entry.getStoreValue());EventType eventType = rowChange.getEventType();System.out.println(String.format("================> binlog[%s:%s] , name[%s,%s] , eventType : %s",entry.getHeader().getLogfileName(), entry.getHeader().getLogfileOffset(),entry.getHeader().getSchemaName(), entry.getHeader().getTableName(), eventType));for (RowData rowData : rowChange.getRowDatasList()) {switch (rowChange.getEventType()) {case INSERT:System.out.println("INSERT ");printColumns(rowData.getAfterColumnsList());break;case UPDATE:System.out.println("UPDATE ");printColumns(rowData.getAfterColumnsList());break;case DELETE:System.out.println("DELETE ");printColumns(rowData.getBeforeColumnsList());break;default:break;}}}}private static void printColumns(List<Column> columns) {for(Column column : columns) {System.out.println(column.getName() + " : " + column.getValue() + " update=" + column.getUpdated());}}
}

测试结果

================> binlog[mysql-bin.000017:240485980] , name[xxl_job,xxl_job_registry] , eventType : UPDATE
UPDATE
id : 402 update=false
registry_group : EXECUTOR update=false
registry_key : hq-eos-crawler update=false
registry_value : 172.27.0.1:15674 update=false
update_time : 2019-12-03 17:54:42 update=true
================> binlog[mysql-bin.000017:240486374] , name[xxl_job,xxl_job_registry] , eventType : UPDATE
UPDATE
id : 82 update=false
registry_group : EXECUTOR update=false
registry_key : hq-eos-inf-config update=false
registry_value : 172.18.0.1:15672 update=false
update_time : 2019-12-03 17:54:42 update=true
================> binlog[mysql-bin.000017:240486774] , name[xxl_job,xxl_job_registry] , eventType : UPDATE

注意一下

 CanalConnector connector = CanalConnectors.newSingleConnector(new InetSocketAddress("10.0.98.186", 11111), "expert", "root", "root");
复制代码

这里的配置来自于 canal.properties 我把这个配置也贴出来吧

canal.id= 8
canal.ip=
canal.port=11111
canal.metrics.pull.port=11112
canal.zkServers=10.0.14.36:2181,10.0.14.39:2181,10.0.14.49:2181
# flush data to zk
canal.zookeeper.flush.period = 1000
canal.withoutNetty = false
# flush meta cursor/parse position to file
canal.file.data.dir = ${canal.conf.dir}
canal.file.flush.period = 1000
## memory store RingBuffer size, should be Math.pow(2,n)
canal.instance.memory.buffer.size = 16384
## memory store RingBuffer used memory unit size , default 1kb
canal.instance.memory.buffer.memunit = 1024
## meory store gets mode used MEMSIZE or ITEMSIZE
canal.instance.memory.batch.mode = MEMSIZE## detecing config
canal.instance.detecting.enable = false
#canal.instance.detecting.sql = insert into retl.xdual values(1,now()) on duplicate key update x=now()
canal.instance.detecting.sql = select 1
canal.instance.detecting.interval.time = 3
canal.instance.detecting.retry.threshold = 3
canal.instance.detecting.heartbeatHaEnable = false# support maximum transaction size, more than the size of the transaction will be cut into multiple transactions delivery
canal.instance.transaction.size = 1024
# mysql fallback connected to new master should fallback times
canal.instance.fallbackIntervalInSeconds = 60# network config
canal.instance.network.receiveBufferSize = 16384
canal.instance.network.sendBufferSize = 16384
canal.instance.network.soTimeout = 30
# binlog filter config
canal.instance.filter.druid.ddl = true
canal.instance.filter.query.dcl = false
canal.instance.filter.query.dml = false
canal.instance.filter.query.ddl = false
canal.instance.filter.table.error = false
canal.instance.filter.rows = false
canal.instance.filter.transaction.entry = false# binlog format/image check
canal.instance.binlog.format = ROW,STATEMENT,MIXED
canal.instance.binlog.image = FULL,MINIMAL,NOBLOB# binlog ddl isolation
canal.instance.get.ddl.isolation = false# parallel parser config
canal.instance.parser.parallel = true
## concurrent thread number, default 60% available processors, suggest not to exceed Runtime.getRuntime().availableProcessors()
#canal.instance.parser.parallelThreadSize = 16
## disruptor ringbuffer size, must be power of 2
canal.instance.parser.parallelBufferSize = 256# table meta tsdb info
canal.instance.tsdb.enable=true
canal.instance.tsdb.dir=${canal.file.data.dir:../conf}/${canal.instance.destination:}
canal.instance.tsdb.url=jdbc:h2:${canal.instance.tsdb.dir}/h2;CACHE_SIZE=1000;MODE=MYSQL;
canal.instance.tsdb.dbUsername=root
canal.instance.tsdb.dbPassword=root
# rds oss binlog account
canal.instance.rds.accesskey =
canal.instance.rds.secretkey =#################################################
######### destinations #############
#################################################
canal.destinations= expert
# conf root dir
canal.conf.dir = ../conf
# auto scan instance dir add/remove and start/stop instance
canal.auto.scan = true
canal.auto.scan.interval = 5canal.instance.tsdb.spring.xml=classpath:spring/tsdb/h2-tsdb.xml
#canal.instance.tsdb.spring.xml=classpath:spring/tsdb/mysql-tsdb.xmlcanal.instance.global.mode = spring
canal.instance.global.lazy = false
#canal.instance.global.manager.address = 127.0.0.1:1099
#canal.instance.global.spring.xml = classpath:spring/memory-instance.xml
canal.instance.global.spring.xml = classpath:spring/file-instance.xml
#canal.instance.global.spring.xml = classpath:spring/default-instance.xml

这上面很多配置这边就不一一说明了 zookeeper的话是做instance 集群的时候用的。

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canal 入门（2）

写个简单的Demo 去监听mysql 数据的变动

Jar包

测试代码

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