版本資訊
java version “1.8.0_141”
Mysql version mysql-8.0.19-winx64
Canal version canal.deployer.1.1.3
rt = 11112
配置mysql的my.ini配置檔案
[mysqld]
mysql_native_password default_authentication_plugin=mysql_native_password
server-id=1
bind-address=0.0.0.0
#開啟binlog日志
log-bin=mysql-bin
binlog_format = ROW
[mysql]
#設定mysql用戶端預設字元集
default-character-set=utf8mb4
[client]
#設定mysql用戶端連接配接服務端時預設使用的端口
port=3306
default-character-set=utf8mb4
配置canal.deployer.1.1.3\conf\example\instance.properties
#position info
canal.instance.master.address=127.0.0.1:3306
canal.instance.master.journal.name=
canal.instance.master.position=
canal.instance.master.timestamp=
canal.instance.master.gtid=
#rds oss binlog
canal.instance.rds.accesskey=
canal.instance.rds.secretkey=
canal.instance.rds.instanceId=
#table meta tsdb info
canal.instance.tsdb.enable=true
#canal.instance.tsdb.url=jdbc:mysql://127.0.0.1:3306/canal_tsdb
#canal.instance.tsdb.dbUsername=canal
#canal.instance.tsdb.dbPassword=canal
配置canal.deployer.1.1.3\conf\canal.properties
#本地IP192.168.31.1:3306
canal.manager.jdbc.url=jdbc:mysql://192.168.31.1:3306/canal_manager?useUnicode=true&characterEncoding=UTF-8
#canal.manager.jdbc.username=root
#canal.manager.jdbc.password=121212
canal.destinations=example
#與my.ini内的server id= 不同即可
canal.id = 111111
canal.ip =
canal.port = 11111
canal.metrics.pull.port = 11112
#table meta tsdb info
canal.instance.tsdb.enable = true
canal.instance.tsdb.dir = c a n a l . f i l e . d a t a . d i r : . . / c o n f / {canal.file.data.dir:../conf}/ 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 = canal
canal.instance.tsdb.dbPassword = canal
#dump snapshot interval, default 24 hour
canal.instance.tsdb.snapshot.interval = 24
#purge snapshot expire , default 360 hour(15 days)
canal.instance.tsdb.snapshot.expire = 360
#aliyun ak/sk , support rds/mq
canal.aliyun.accessKey =
canal.aliyun.secretKey =
#################################################
######### destinations #############
#################################################
canal.destinations = example
#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 = 5
重新開機mysql,登入mysql内
建立canal使用者和授權;
// 新增使用者
CREATE USER ‘canal’@’%’ IDENTIFIED BY ‘canal’;
// 授權
GRANT SHOW VIEW, SELECT, REPLICATION SLAVE, REPLICATION CLIENT ON . TO ‘canal’@’%’;
// 重新整理
FLUSH PRIVILEGES;
開啟canal.deployer.1.1.3\bin\start.bat
cmd界面:
檢視:canal.deployer.1.1.3\logs\canal\canal.log
canal配置的其他參數以及解釋:
參考:寫的很詳細,在此感謝大神的辛苦創作
https://blog.csdn.net/u012758088/article/details/78789616?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task
javacanal連接配接。代碼
注意事項一:下面的代碼需要保證mysql與oracle導入導出的資料庫名稱和表名稱完全一緻,而且在mysql端建立删除表,oracle也會有對應的操作,建立表之後就可以插入資料,
因為Oracle與mysql的sql語句不通,而且拿到sql語句不支援oracle直接操作,是以該代碼不支援delete,insert,update,create,drop之外的操作,需要另外開發(沒必要)
注意事項二:因為拿到的資料均為string,是以在對資料進行操作時,除了基本資料類型和String類型,其他類型均要轉換成oracle支援的資料類型,date的已經做了轉換,基本資料類型和string不需要裝換,如果有其他資料類型時,請先校驗轉換,參考date類型的處理方式,除date外,sql語句拼接的都是string(oracle可以用string資料導入基本資料類型的字段,例如 “1”等同于int 1)
注意事項3:如果有其他資料類型而且不能做轉換,請聯系QQ:1078442730,有另外的處理方式,但是要犧牲靈活性,所有的表都要事先建立對象,如果表有100個字段,就要建立100個屬性,重複代碼太多,靈活性太低,但是可以保證所有資料類型在mysql端和oracle端是一緻的。
canla連接配接:通過配置檔案連接配接
package com.zzw.Conn;
import com.alibaba.otter.canal.client.CanalConnector;
import com.alibaba.otter.canal.client.CanalConnectors;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Properties;
public class CanalConn {
static String hostname = null;
static int port = 0;
static String destination = null;
static String username = null;
static String password = null;
static {
Properties properties = new Properties();
try {
properties.load(newFileInputStream("D:\\idea_code\\CanalMysqlToOrcal\\lib\\canal"));
hostname = properties.getProperty("hostname");
port = Integer.parseInt(properties.getProperty("port"));
destination = properties.getProperty("destination");
username = properties.getProperty("username");
password = properties.getProperty("Cpassword");
} catch (IOException e) {
e.printStackTrace();
}
}
public static CanalConnector getconn(){
InetSocketAddress isa= new InetSocketAddress(hostname,port);
CanalConnector connector = CanalConnectors.newSingleConnector(isa,destination,username,password);
System.out.println("connection Successfully");
return connector;
}
}
Canal的java配置檔案:
hostname=192.168.31.1 canal運作的用戶端IP
port=11111 canal的conf下的配置檔案中配置的port
destination=example canal的conf下的配置檔案中配置的destination
username=canal 第四步建立授權的canal使用者與密碼,與canal的conf下的
配置檔案中配置的保持一緻
Password=canla
CanalMysqlToOrcal下的代碼部分詳解
package com.zzw.RunSoft;
import com.alibaba.otter.canal.client.CanalConnector;
import com.alibaba.otter.canal.protocol.Message;
import com.beimingsoft.Conn.CanalConn;
import com.beimingsoft.Conn.OracleConn;
import com.beimingsoft.actiontooracle.ActionToOracle;
import java.sql.Connection;
import java.sql.PreparedStatement;
/**
* long batchId = message.getId();此參數類似于KAFKA的偏移量,當操作成功時,偏移量增加,否則復原
* connector.ack(batchId):送出偏移量
* connector.rollback(batchId):復原偏移量
* tips: batchid=message.getId(),指的是同一個庫同一個表的偏移量,例如如果操作的表未在目标庫建立,則在建立後消費對應的message.getId()
* 也就是:每個表都有對應的message.getId(),并且互相之間互不影響
*/
public class MysqlToOracle {
public static void main(String[] args) {
//擷取oracle連接配接
Connection conn = OracleConn.getConnection();
//建立PreparedStatement
PreparedStatement ps = null;
//建立GetTabFileds 對象
//擷取canal的連接配接
CanalConnector connector = CanalConn.getconn();
connector.connect();
/*bin-log的分隔符,與cmd界面的:
[New I/O server worker #1-2] WARN c.a.o.canal.parse.inbound.mysql.dbsync.LogEventConvert
- --> init table filter : ^.*\..*$保持一緻,預設就是.*\..* 不建議修改canal的該項配置
*/
connector.subscribe(".*\\..*");
//持續拉取資料,有bin-log産生就會消費
while (true) {
//i,用于判斷是否執行成功,i==1,成功,送出message.get.Id,否則復原message.get.Id
int i = 0;
// 擷取指定數量的資料
Message message = connector.getWithoutAck(100);
//拿到偏移量
long batchId = message.getId();
//如果沒有資料可以拉取,則休眠1s
if (batchId == -1 || message.getEntries().isEmpty()) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
continue;
}
//得到i值,并執行操作
i = ActionToOracle.action(conn, ps, message.getEntries());
if (i == 1) {
// 送出确認,消費成功,通知server删除資料
connector.ack(batchId);
System.out.println("偏移量更新成功");
//*****************************************************************
//因為在代碼測試過程中 mysql與oracle的sql語句不通,是以會不斷報錯,是以設定了無論成功還是失敗都送出偏移量
// 不然會不停的復原不停地拉取不停的報錯,是以按照需要這部分代碼需要按照實際更改
} else if (i==0) {
Connector.ack(batchId);
System.out.println("再見蠢貨");
***//為防止不停報錯,以下語句實際不會出現,按照需求修改***
}else {
// 處理失敗, 復原資料,後續重新擷取資料
connector.rollback(batchId);
System.out.println("偏移量復原成功");
}
}
}
}
對oracle操作部分的代碼
package com.zzw.actiontooracle;
import com.alibaba.otter.canal.protocol.CanalEntry;
import com.google.protobuf.InvalidProtocolBufferException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.util.List;
public class ActionToOracle {
//每個方法的傳回值 1,代表成功,0代表失敗 ,預設0
private static int status = 0;
//從sql語句中抽取中繼資料表的庫名和表名
public static String from_tab = null;
public static String from_db = null;
//ddl操作的sql語句
private static String ddl_sql = null;
public static int action(Connection conn, PreparedStatement ps, List<CanalEntry.Entry> entries) {
for (CanalEntry.Entry entry : entries) {
if (entry.getEntryType() != CanalEntry.EntryType.ROWDATA) {
continue;
}
CanalEntry.RowChange rowChange = null;
try {
//拿到binlog
rowChange = CanalEntry.RowChange.parseFrom(entry.getStoreValue());
} catch (InvalidProtocolBufferException e) {
e.printStackTrace();
}
CanalEntry.EventType eventType = rowChange.getEventType();
//從sql語句中抽取中繼資料表的庫名和表名
from_tab = entry.getHeader().getTableName();
from_db = entry.getHeader().getSchemaName();
//拿到sql,該SQL智能拿到DDLSQL語句,DMLSQL語句拿不到,dml操作的話,rowChange.getSql()不執行(測試結果如此,沒有查到資料講為什麼這樣)
ddl_sql = rowChange.getSql();
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));
/**
如果是ddl語句,比對insert,delete,update,執行相關操作
*/
if (!rowChange.getIsDdl()) {
for (CanalEntry.RowData rowData : rowChange.getRowDatasList()) {
switch (eventType) {
case INSERT:
System.out.println();
System.out.println("INSERT ");
status = ActionToOracleFuction.insertToOracle(conn, ps, rowData.getAfterColumnsList());
break;
case UPDATE:
System.out.println();
System.out.println("UPDATE ");
status = ActionToOracleFuction.updateToOracle(conn, ps, rowData.getAfterColumnsList(),rowData.getBeforeColumnsList());
break;
case DELETE:
System.out.println();
System.out.println("DELETE ");
status = ActionToOracleFuction.deleteFromOracle(conn, ps, rowData.getBeforeColumnsList());
break;
default:
System.out.println(eventType);
break;
}
}
} else {
//如果是DDL操作 執行下面的語句
System.out.println();
System.out.println("ddl操作");
status = ActionToOracleFuction.ddlAction(conn, ps, ddl_sql, eventType);
}
}
return status;
}
}
執行oracle實際操作的函數類
package com.zzw.actiontooracle;
import com.alibaba.otter.canal.protocol.CanalEntry;
import com.beimingsoft.Conn.OracleConn;
import java.sql.Connection;
import java.sql.Date;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import static com.beimingsoft.actiontooracle.ActionToOracle.from_db;
import static com.beimingsoft.actiontooracle.ActionToOracle.from_tab;
;
public class ActionToOracleFuction {
private static int deletestatus = 0;
private static int updatestatus = 0;
private static int insertstatus = 0;
private static int ddlactionstatus = 0;
private static String sql = null;
private static Date date = null;
private static List<Date> dates = new ArrayList<>();
//beforecolumns:執行DML操作之前的資料集 aftercolimns :之心DML操作之後的資料集
//具體思路檢視insertFromOracle函數,總之一句話,拿到字段名,對應的值,重新組裝一個适合oracle的SQL語句
//但是要注意date類型的資料,從beforecolumns或者aftercolumns中拿到的都是String,對于oracle插入的整數,//小數,字元串沒有影響,對date類型不可操作,具體解決辦法檢視insertFromOracle,是否還有其他資料類型需要做校對//還不清楚
public static int deleteFromOracle(Connection conn, PreparedStatement ps, List<CanalEntry.Column> beforecolumns) {
int i = 1;
sql = "delete from " + from_db + "." + from_tab + " where ";
for (CanalEntry.Column column : beforecolumns) {
try {
date = Date.valueOf(column.getValue());
} catch (IllegalArgumentException e) {
sql = sql + column.getName() + "='" + column.getValue() + "' and ";
}
if (date != null) {
sql = sql + column.getName() + "=? and ";
dates.add(date);
date = null;
}
}
sql = sql.substring(0, sql.lastIndexOf("and"));
System.err.println(sql);
conn = OracleConn.getConnection();
try {
ps = conn.prepareStatement(sql);
for (Date date : dates) {
ps.setDate(i, date);
i++;
}
ps.execute();
System.out.println("sql送出成功");
conn.commit();
System.out.println("commit成功,執行狀态:success");
deletestatus = 1;
} catch (SQLException e) {
e.printStackTrace();
System.err.println("表或視圖不存在,請檢查設定");
} finally {
OracleConn.close(ps, conn);
dates.clear();
}
return deletestatus;
}
public static int updateToOracle(Connection conn, PreparedStatement ps, List<CanalEntry.Column> aftercolumns, List<CanalEntry.Column> beforecolumns) {
String sql = "update " + from_db + "." + from_tab + " set ";
int i = 1;
for (CanalEntry.Column column : aftercolumns) {
try {
date = Date.valueOf(column.getValue());
} catch (IllegalArgumentException e) {
sql = sql + column.getName() + "='" + column.getValue() + "',";
}
if (date != null) {
sql = sql + column.getName() + "=?,";
dates.add(date);
date = null;
}
}
sql = sql.substring(0, sql.lastIndexOf(",")) + " where ";
for (CanalEntry.Column column : beforecolumns) {
try {
date = Date.valueOf(column.getValue());
} catch (IllegalArgumentException e) {
sql = sql + column.getName() + "='" + column.getValue() + "' and ";
}
if (date != null) {
sql = sql + column.getName() + "=? and ";
dates.add(date);
date = null;
}
}
sql = sql.substring(0, sql.lastIndexOf("and"));
System.err.println(sql);
conn = OracleConn.getConnection();
try {
conn = OracleConn.getConnection();
ps = conn.prepareStatement(sql);
for (Date date : dates) {
//把dates中的date取出,i=1,是以如果有date類型的資料就傳到sql,同時i自增,i的值與參數的順序就有序了
ps.setDate(i, date);
i++;
}
ps.execute();
System.out.println("sql送出成功");
conn.commit();
System.out.println("commit成功,執行狀态:success");
updatestatus = 1;
} catch (SQLException e) {
e.printStackTrace();
System.err.println("表或視圖不存在,請檢查設定");
} finally {
OracleConn.close(ps, conn);
//等把所有的dates中的date取出後清空dates,不然影響dates的資料會一直增加,傳參到SQL有誤
dates.clear();
}
return updatestatus;
}
public static int insertToOracle(Connection conn, PreparedStatement ps, List<CanalEntry.Column> aftercolumns) {
//ps的第一個參數,SQL語句的第一個?的索引值
int i = 1;
//拼接sql : 例如:insert into scott.userinfo (
String sql = "insert into " + from_db + "." + from_tab + " (";
//拼接sql:例如:insert into scott.userinfo (u_id,u_name,u_age,
for (CanalEntry.Column column : aftercolumns) {
sql = sql + column.getName() + ",";
}
//截取sql并拼接:例如 insert into scott.userinfo (u_id,u_name,u_age) values (
sql = sql.substring(0, sql.lastIndexOf(",")) + ") values(";
//拼接sql:例如insert into scott.userinfo (u_id,u_name,u_age) values (1,,張三',1,
for (CanalEntry.Column column : aftercolumns) {
try {
//把String轉成sqlDate,如果不Date類型則下面語句不執行,執行catch内容
date = Date.valueOf(column.getValue());
} catch (IllegalArgumentException e) {
sql = sql + "'" + column.getValue() + "'" + ",";
}
//如果沒有catch到異常,則拼接sql,把?拼接到sql中,同時把date放到list中
if (date != null) {
sql = sql + "?,";
dates.add(date);
date = null;
}
}
//截取拼接sql:例如insert into scott.userinfo (u_id,u_name,u_age) values (1,,張三',1)
sql = sql.substring(0, sql.lastIndexOf(",")) + ")";
System.err.println(sql);
try {
conn = OracleConn.getConnection();
ps = conn.prepareStatement(sql);
for (Date date : dates) {
//把dates中的date取出,i=1,是以如果有date類型的資料就傳到sql,同時i自增,i的值與參數的順序就有序了
ps.setDate(i, date);
i++;
}
ps.execute();
System.out.println("sql送出成功");
conn.commit();
System.out.println("commit成功,執行狀态:success");
insertstatus = 1;
} catch (SQLException e) {
e.printStackTrace();
System.err.println("表或視圖不存在,請檢查設定");
} finally {
OracleConn.close(ps, conn);
//等把所有的dates中的date取出後清空dates,不然影響dates的資料會一直增加,傳參到SQL有誤
dates.clear();
}
return insertstatus;
}
public static int ddlAction(Connection conn, PreparedStatement ps, String ddl_sql, CanalEntry.EventType eventType) {
switch (eventType) {
case CREATE:
sql = ddl_sql;
break;
case ERASE:
//解析出來的binlog日志内的DROPsql:DROP TABLE `u` /* generated by server */
//oracl無法直接使用該sql,是以通過元資訊中的資料庫名,和表名重組sql
//是以需要保證mysql和oracle中同步的資料庫表名和資料名一緻。不一緻也可以,但是需要添加配置,在配置中設定
//而且會有局限性。
sql = "drop table " + from_db + "." + from_tab;
}
System.err.println(sql);
try {
conn = OracleConn.getConnection();
ps = conn.prepareStatement(sql);
ps.execute();
System.out.println("sql送出成功");
conn.commit();
System.out.println("commit成功,執行狀态:success");
ddlactionstatus = 1;
} catch (SQLException e) {
System.err.println("操作失敗");
} finally {
OracleConn.close(ps, conn);
}
return ddlactionstatus;
}
}