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agapple
2014-09-23 15:11:35 +08:00
commit a0defe575b
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35
instance/core/pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.alibaba.otter</groupId>
<artifactId>canal</artifactId>
<version>1.0.19-SNAPSHOT</version>
<relativePath>../../pom.xml</relativePath>
</parent>
<groupId>com.alibaba.otter</groupId>
<artifactId>canal.instance.core</artifactId>
<packaging>jar</packaging>
<name>canal instance core module for otter ${project.version}</name>
<dependencies>
<dependency>
<groupId>com.alibaba.otter</groupId>
<artifactId>canal.common</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba.otter</groupId>
<artifactId>canal.store</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba.otter</groupId>
<artifactId>canal.meta</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba.otter</groupId>
<artifactId>canal.parse</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
</project>

35
instance/core/src/main/java/com/alibaba/otter/canal/instance/core/CanalInstance.java Normal file
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package com.alibaba.otter.canal.instance.core;
import com.alibaba.otter.canal.common.CanalLifeCycle;
import com.alibaba.otter.canal.common.alarm.CanalAlarmHandler;
import com.alibaba.otter.canal.meta.CanalMetaManager;
import com.alibaba.otter.canal.parse.CanalEventParser;
import com.alibaba.otter.canal.protocol.ClientIdentity;
import com.alibaba.otter.canal.sink.CanalEventSink;
import com.alibaba.otter.canal.store.CanalEventStore;
/**
* 代表单个canal实例，比如一个destination会独立一个实例
*
* @author jianghang 2012-7-12 下午12:04:58
* @version 1.0.0
*/
public interface CanalInstance extends CanalLifeCycle {
public String getDestination();
public CanalEventParser getEventParser();
public CanalEventSink getEventSink();
public CanalEventStore getEventStore();
public CanalMetaManager getMetaManager();
public CanalAlarmHandler getAlarmHandler();
/**
* 客户端发生订阅/取消订阅行为
*/
public boolean subscribeChange(ClientIdentity identity);
}

16
instance/core/src/main/java/com/alibaba/otter/canal/instance/core/CanalInstanceGenerator.java Normal file
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package com.alibaba.otter.canal.instance.core;
/**
* @author zebin.xuzb @ 2012-7-12
* @version 1.0.0
*/
public interface CanalInstanceGenerator {
/**
* 通过 destination 产生特定的 {@link CanalInstance}
*
* @param destination
* @return
*/
CanalInstance generate(String destination);
}

105
instance/core/src/main/java/com/alibaba/otter/canal/instance/core/CanalInstanceSupport.java Normal file
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package com.alibaba.otter.canal.instance.core;
import java.util.List;
import com.alibaba.otter.canal.common.AbstractCanalLifeCycle;
import com.alibaba.otter.canal.parse.CanalEventParser;
import com.alibaba.otter.canal.parse.ha.CanalHAController;
import com.alibaba.otter.canal.parse.ha.HeartBeatHAController;
import com.alibaba.otter.canal.parse.inbound.AbstractEventParser;
import com.alibaba.otter.canal.parse.inbound.group.GroupEventParser;
import com.alibaba.otter.canal.parse.inbound.mysql.MysqlEventParser;
import com.alibaba.otter.canal.parse.index.CanalLogPositionManager;
/**
* @author zebin.xuzb 2012-10-17 下午3:12:34
* @version 1.0.0
*/
public abstract class CanalInstanceSupport extends AbstractCanalLifeCycle {
protected void beforeStartEventParser(CanalEventParser eventParser) {
boolean isGroup = (eventParser instanceof GroupEventParser);
if (isGroup) {
// 处理group的模式
List<CanalEventParser> eventParsers = ((GroupEventParser) eventParser).getEventParsers();
for (CanalEventParser singleEventParser : eventParsers) {// 需要遍历启动
startEventParserInternal(singleEventParser, true);
}
} else {
startEventParserInternal(eventParser, false);
}
}
// around event parser
protected void afterStartEventParser(CanalEventParser eventParser) {
// noop
}
// around event parser
protected void beforeStopEventParser(CanalEventParser eventParser) {
// noop
}
protected void afterStopEventParser(CanalEventParser eventParser) {
boolean isGroup = (eventParser instanceof GroupEventParser);
if (isGroup) {
// 处理group的模式
List<CanalEventParser> eventParsers = ((GroupEventParser) eventParser).getEventParsers();
for (CanalEventParser singleEventParser : eventParsers) {// 需要遍历启动
stopEventParserInternal(singleEventParser);
}
} else {
stopEventParserInternal(eventParser);
}
}
/**
* 初始化单个eventParser，不需要考虑group
*/
protected void startEventParserInternal(CanalEventParser eventParser, boolean isGroup) {
if (eventParser instanceof AbstractEventParser) {
AbstractEventParser abstractEventParser = (AbstractEventParser) eventParser;
// 首先启动log position管理器
CanalLogPositionManager logPositionManager = abstractEventParser.getLogPositionManager();
if (!logPositionManager.isStart()) {
logPositionManager.start();
}
}
if (eventParser instanceof MysqlEventParser) {
MysqlEventParser mysqlEventParser = (MysqlEventParser) eventParser;
CanalHAController haController = mysqlEventParser.getHaController();
if (haController instanceof HeartBeatHAController) {
((HeartBeatHAController) haController).setCanalHASwitchable(mysqlEventParser);
}
if (!haController.isStart()) {
haController.start();
}
}
}
protected void stopEventParserInternal(CanalEventParser eventParser) {
if (eventParser instanceof AbstractEventParser) {
AbstractEventParser abstractEventParser = (AbstractEventParser) eventParser;
// 首先启动log position管理器
CanalLogPositionManager logPositionManager = abstractEventParser.getLogPositionManager();
if (logPositionManager.isStart()) {
logPositionManager.stop();
}
}
if (eventParser instanceof MysqlEventParser) {
MysqlEventParser mysqlEventParser = (MysqlEventParser) eventParser;
CanalHAController haController = mysqlEventParser.getHaController();
if (haController.isStart()) {
haController.stop();
}
}
}
}