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AbstractCanalInstance的subscribeChange方法，增加对AbstractEventParser的类型判断；MysqlEventParser对Gtid的处理需要考虑兼容性 (#1824)

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* AbstractCanalInstance的subscribeChange方法，增加对AbstractEventParser的类型判断，以支持用户的自定义CanalEventParser

* MysqlEventParser对Gtid模式的处理需要考虑兼容性，支持系统平滑的从非gtid模式升级为gtid模式
This commit is contained in:
lulu2panpan
2019-05-28 00:05:13 +08:00
committed by agapple
parent ce7948d6e7
commit e808c6ec70
3 changed files with 16 additions and 9 deletions
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4
parse/src/main/java/com/alibaba/otter/canal/parse/inbound/AbstractEventParser.java
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@@ -242,7 +242,7 @@ public abstract class AbstractEventParser<EVENT> extends AbstractCanalLifeCycle
if (parallel) {
// build stage processor
multiStageCoprocessor = buildMultiStageCoprocessor();
if (isGTIDMode()) {
if (isGTIDMode() && StringUtils.isNotEmpty(startPosition.getGtid())) {
// 判断所属instance是否启用GTID模式，是的话调用ErosaConnection中GTID对应方法dump数据
GTIDSet gtidSet = MysqlGTIDSet.parse(startPosition.getGtid());
((MysqlMultiStageCoprocessor) multiStageCoprocessor).setGtidSet(gtidSet);
@@ -260,7 +260,7 @@ public abstract class AbstractEventParser<EVENT> extends AbstractCanalLifeCycle
}
}
} else {
if (isGTIDMode()) {
if (isGTIDMode() && StringUtils.isNotEmpty(startPosition.getGtid())) {
// 判断所属instance是否启用GTID模式，是的话调用ErosaConnection中GTID对应方法dump数据
erosaConnection.dump(MysqlGTIDSet.parse(startPosition.getGtid()), sinkHandler);
} else {

13
parse/src/main/java/com/alibaba/otter/canal/parse/inbound/mysql/MysqlEventParser.java
View File

@@ -355,11 +355,14 @@ public class MysqlEventParser extends AbstractMysqlEventParser implements CanalE
// GTID模式下，CanalLogPositionManager里取最后的gtid，没有则取instanc配置中的
LogPosition logPosition = getLogPositionManager().getLatestIndexBy(destination);
if (logPosition != null) {
return logPosition.getPostion();
}
if (masterPosition != null && StringUtils.isNotEmpty(masterPosition.getGtid())) {
return masterPosition;
// 如果以前是非GTID模式，后来调整为了GTID模式，那么为了保持兼容，需要判断gtid是否为空
if (StringUtils.isNotEmpty(logPosition.getPostion().getGtid())) {
return logPosition.getPostion();
}
}else {
if (masterPosition != null && StringUtils.isNotEmpty(masterPosition.getGtid())) {
return masterPosition;
}
}
}