package com.alibaba.otter.canal.instance.spring;
import java.util.List;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.otter.canal.common.alarm.CanalAlarmHandler;
import com.alibaba.otter.canal.filter.aviater.AviaterRegexFilter;
import com.alibaba.otter.canal.instance.core.CanalInstance;
import com.alibaba.otter.canal.instance.core.CanalInstanceSupport;
import com.alibaba.otter.canal.meta.CanalMetaManager;
import com.alibaba.otter.canal.parse.CanalEventParser;
import com.alibaba.otter.canal.parse.inbound.AbstractEventParser;
import com.alibaba.otter.canal.parse.inbound.group.GroupEventParser;
import com.alibaba.otter.canal.protocol.CanalEntry;
import com.alibaba.otter.canal.protocol.ClientIdentity;
import com.alibaba.otter.canal.sink.CanalEventSink;
import com.alibaba.otter.canal.store.CanalEventStore;
import com.alibaba.otter.canal.store.model.Event;
/**
* 基于spring容器启动canal实例，方便独立于manager启动
*
* @author jianghang 2012-7-12 下午01:21:26
* @author zebin.xuzb
* @version 1.0.0
*/
public class CanalInstanceWithSpring extends CanalInstanceSupport implements CanalInstance {
private static final Logger logger = LoggerFactory.getLogger(CanalInstanceWithSpring.class);
private String destination;
private CanalEventParser eventParser;
private CanalEventSink<List<CanalEntry.Entry>> eventSink;
private CanalEventStore<Event> eventStore;
private CanalMetaManager metaManager;
private CanalAlarmHandler alarmHandler;
public String getDestination() {
return this.destination;
}
public CanalEventParser getEventParser() {
return this.eventParser;
}
public CanalEventSink<List<CanalEntry.Entry>> getEventSink() {
return this.eventSink;
}
public CanalEventStore<Event> getEventStore() {
return this.eventStore;
}
public CanalMetaManager getMetaManager() {
return this.metaManager;
}
public CanalAlarmHandler getAlarmHandler() {
return alarmHandler;
}
public boolean subscribeChange(ClientIdentity identity) {
if (StringUtils.isNotEmpty(identity.getFilter())) {
AviaterRegexFilter aviaterFilter = new AviaterRegexFilter(identity.getFilter());
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
((AbstractEventParser) singleEventParser).setEventFilter(aviaterFilter);
}
} else {
((AbstractEventParser) eventParser).setEventFilter(aviaterFilter);
}
}
// filter的处理规则
// a. parser处理数据过滤处理
// b. sink处理数据的路由&分发,一份parse数据经过sink后可以分发为多份，每份的数据可以根据自己的过滤规则不同而有不同的数据
// 后续内存版的一对多分发，可以考虑
return true;
}
protected void afterStartEventParser(CanalEventParser eventParser) {
super.afterStartEventParser(eventParser);
// 读取一下历史订阅的filter信息
List<ClientIdentity> clientIdentitys = metaManager.listAllSubscribeInfo(destination);
for (ClientIdentity clientIdentity : clientIdentitys) {
subscribeChange(clientIdentity);
}
}
public void start() {
super.start();
logger.info("start CannalInstance for {}-{} ", new Object[] { 1, destination });
if (!metaManager.isStart()) {
metaManager.start();
}
if (!eventStore.isStart()) {
eventStore.start();
}
if (!eventSink.isStart()) {
eventSink.start();
}
if (!eventParser.isStart()) {
beforeStartEventParser(eventParser);
eventParser.start();
afterStartEventParser(eventParser);
}
logger.info("start successful....");
}
public void stop() {
logger.info("stop CannalInstance for {}-{} ", new Object[] { 1, destination });
if (eventParser.isStart()) {
beforeStopEventParser(eventParser);
eventParser.stop();
afterStopEventParser(eventParser);
}
if (eventSink.isStart()) {
eventSink.stop();
}
if (eventStore.isStart()) {
eventStore.stop();
}
if (metaManager.isStart()) {
metaManager.stop();
}
if (alarmHandler.isStart()) {
alarmHandler.stop();
}
// if (zkClientx != null) {
// zkClientx.close();
// }
super.stop();
logger.info("stop successful....");
}
// ======== setter ========
public void setDestination(String destination) {
this.destination = destination;
}
public void setEventParser(CanalEventParser eventParser) {
this.eventParser = eventParser;
}
public void setEventSink(CanalEventSink<List<CanalEntry.Entry>> eventSink) {
this.eventSink = eventSink;
}
public void setEventStore(CanalEventStore<Event> eventStore) {
this.eventStore = eventStore;
}
public void setMetaManager(CanalMetaManager metaManager) {
this.metaManager = metaManager;
}
public void setAlarmHandler(CanalAlarmHandler alarmHandler) {
this.alarmHandler = alarmHandler;
}
}