關於SpringBoot整合Canal數據同步的問題
1、CentOS7編譯安裝MySQL5.7.24
CentOS7編譯安裝MySQL5.7.24的教程詳解
鏈接地址:https://www.jb51.net/article/152246.htm
2、Mysql設置binLog配置
(1)檢查binlog功能是否有開啟
(2)如果顯示狀態為OFF表示該功能未開啟,開啟binlog功能
mysql> show variables like 'log_bin'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | log_bin | OFF | +---------------+-------+ 1 row in set (0.00 sec)
1,修改 mysql 的配置文件 my.cnf
vi /etc/my.cnf
追加內容:
log-bin=mysql-bin #binlog文件名 binlog_format=ROW #選擇row模式 server_id=1 #mysql實例id,不能和canal的slaveId重復
2,重啟 mysql:
service mysql restart
3,登錄 mysql 客戶端,查看 log_bin 變量
mysql> show variables like 'log_bin'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | log_bin | ON| +---------------+-------+ 1 row in set (0.00 sec) 如果顯示狀態為ON表示該功能已開啟
(3)在mysql裡面添加以下的相關用戶和權限
CREATE USER 'canal'@'%' IDENTIFIED BY 'canal'; GRANT SHOW VIEW, SELECT, REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'canal'@'%'; FLUSH PRIVILEGES;
3、Linux下載安裝Canal服務
下載地址:
https://github.com/alibaba/canal/releases
(1)下載之後,放到目錄中,解壓文件
mkdir /usr/local/canal cd /usr/local/canal canal.deployer-1.1.4.tar.gz tar zxvf canal.deployer-1.1.4.tar.gz
(2)修改配置文件
vi conf/example/instance.properties
#需要改成自己的數據庫信息 canal.instance.master.address=39.106.224.236:3306 #需要改成自己的數據庫用戶名與密碼 canal.instance.dbUsername=canal canal.instance.dbPassword=canal #需要改成同步的數據庫表規則 #1、同步所有的表 canal.instance.filter.regex=.*\\..* #2、需要同步的那個庫中的那個表 #canal.instance.filter.regex=guli_ucenter.ucenter_member
mysql 數據解析關註的表,Perl正則表達式.
多個正則之間以逗號(,)分隔,轉義符需要雙斜杠(\)
常見例子:
- 所有表:.* or .\…
- canal schema下所有表: canal\…*
- canal下的以canal打頭的表:canal\.canal.*
- canal schema下的一張表:canal.test1
- 多個規則組合使用:canal\…*,mysql.test1,mysql.test2 (逗號分隔)
- 註意:此過濾條件隻針對row模式的數據有效(ps. mixed/statement因為不解析sql,所以無法準確提
- 取tableName進行過濾).
(3)進入bin目錄下啟動
./startup.sh
4、Boot項目中引入依賴
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--mysql--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>commons-dbutils</groupId> <artifactId>commons-dbutils</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>com.alibaba.otter</groupId> <artifactId>canal.client</artifactId> </dependency> </dependencies>
5 、修改properties配置文件
# mysql數據庫連接 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver spring.datasource.url=jdbc:mysql://localhost:3306/guli?serverTimezone=GMT%2B8 spring.datasource.username=root spring.datasource.password=123456
6、修改Application啟動類
7、創建Canal配置類自動監聽
註意: 在run()
方法中自行修改Linux虛擬機Ip地址後直接使用!
package com.atguigu.canal.client; import com.alibaba.otter.canal.client.CanalConnector; import com.alibaba.otter.canal.client.CanalConnectors; import com.alibaba.otter.canal.protocol.CanalEntry.*; import com.alibaba.otter.canal.protocol.Message; import com.google.protobuf.InvalidProtocolBufferException; import org.apache.commons.dbutils.DbUtils; import org.apache.commons.dbutils.QueryRunner; import org.springframework.stereotype.Component; import javax.annotation.Resource; import javax.sql.DataSource; import java.net.InetSocketAddress; import java.sql.Connection; import java.sql.SQLException; import java.util.List; import java.util.Queue; import java.util.concurrent.ConcurrentLinkedQueue; @Component public class CanalClient { //sql隊列 private Queue<String> SQL_QUEUE = new ConcurrentLinkedQueue<>(); @Resource private DataSource dataSource; /** * canal入庫方法 */ public void run() { CanalConnector connector = CanalConnectors.newSingleConnector(new /* * 此處Ip地址為linux虛擬機地址 * 端口號為固定 11111 * 其他不用修改 */ InetSocketAddress("39.106.224.236", 11111), "example", "", ""); int batchSize = 1000; try { connector.connect(); connector.subscribe(".*\\..*"); connector.rollback(); try { while (true) { //嘗試從master那邊拉去數據batchSize條記錄,有多少取多少 Message message = connector.getWithoutAck(batchSize); long batchId = message.getId(); int size = message.getEntries().size(); if (batchId == -1 || size == 0) { Thread.sleep(1000); } else { dataHandle(message.getEntries()); } connector.ack(batchId); //當隊列裡面堆積的sql大於一定數值的時候就模擬執行 if (SQL_QUEUE.size() >= 1) { executeQueueSql(); } } } catch (InterruptedException e) { e.printStackTrace(); } catch (InvalidProtocolBufferException e) { e.printStackTrace(); } } finally { connector.disconnect(); } } /** * 模擬執行隊列裡面的sql語句 */ public void executeQueueSql() { int size = SQL_QUEUE.size(); for (int i = 0; i < size; i++) { String sql = SQL_QUEUE.poll(); System.out.println("[sql]----> " + sql); this.execute(sql.toString()); } } /** * 數據處理 * @param entrys */ private void dataHandle(List<Entry> entrys) throws InvalidProtocolBufferException { for (Entry entry : entrys) { if (EntryType.ROWDATA == entry.getEntryType()) { RowChange rowChange = RowChange.parseFrom(entry.getStoreValue()); EventType eventType = rowChange.getEventType(); if (eventType == EventType.DELETE) { saveDeleteSql(entry); } else if (eventType == EventType.UPDATE) { saveUpdateSql(entry); } else if (eventType == EventType.INSERT) { saveInsertSql(entry); } } } } /** * 保存更新語句 * @param entry */ private void saveUpdateSql(Entry entry) { try { RowChange rowChange = RowChange.parseFrom(entry.getStoreValue()); List<RowData> rowDatasList = rowChange.getRowDatasList(); for (RowData rowData : rowDatasList) { List<Column> newColumnList = rowData.getAfterColumnsList(); StringBuffer sql = new StringBuffer("update " + entry.getHeader().getTableName() + " set "); for (int i = 0; i < newColumnList.size(); i++) { sql.append(" " + newColumnList.get(i).getName() + " = '" + newColumnList.get(i).getValue() + "'"); if (i != newColumnList.size() - 1) { sql.append(","); } } sql.append(" where "); List<Column> oldColumnList = rowData.getBeforeColumnsList(); for (Column column : oldColumnList) { if (column.getIsKey()) { //暫時隻支持單一主鍵 sql.append(column.getName() + "=" + column.getValue()); break; } } SQL_QUEUE.add(sql.toString()); } } catch (InvalidProtocolBufferException e) { e.printStackTrace(); } } /** * 保存刪除語句 * * @param entry */ private void saveDeleteSql(Entry entry) { try { RowChange rowChange = RowChange.parseFrom(entry.getStoreValue()); List<RowData> rowDatasList = rowChange.getRowDatasList(); for (RowData rowData : rowDatasList) { List<Column> columnList = rowData.getBeforeColumnsList(); StringBuffer sql = new StringBuffer("delete from " + entry.getHeader().getTableName() + " where "); for (Column column : columnList) { if (column.getIsKey()) { //暫時隻支持單一主鍵 sql.append(column.getName() + "=" + column.getValue()); break; } } SQL_QUEUE.add(sql.toString()); } } catch (InvalidProtocolBufferException e) { e.printStackTrace(); } } /** * 保存插入語句 * * @param entry */ private void saveInsertSql(Entry entry) { try { RowChange rowChange = RowChange.parseFrom(entry.getStoreValue()); List<RowData> rowDatasList = rowChange.getRowDatasList(); for (RowData rowData : rowDatasList) { List<Column> columnList = rowData.getAfterColumnsList(); StringBuffer sql = new StringBuffer("insert into "+entry.getHeader().getTableName() + " ("); for (int i = 0; i < columnList.size(); i++) { sql.append(columnList.get(i).getName()); if (i != columnList.size() - 1) { sql.append(","); } } sql.append(") VALUES ("); for (int i = 0; i < columnList.size(); i++) { sql.append("'" + columnList.get(i).getValue() + "'"); if (i != columnList.size() - 1) { sql.append(","); } } sql.append(")"); SQL_QUEUE.add(sql.toString()); } } catch (InvalidProtocolBufferException e) { e.printStackTrace(); } } /** * 入庫 * @param sql */ public void execute(String sql) { Connection con = null; try { if(null == sql) return; con = dataSource.getConnection(); QueryRunner qr = new QueryRunner(); int row = qr.execute(con, sql); System.out.println("update: "+ row); } catch (SQLException e) { e.printStackTrace(); } finally { DbUtils.closeQuietly(con); } } }
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