SwitchPrepareCheckRunner.java
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package io.mycat.migrate;
import com.alibaba.fastjson.JSON;
import com.google.common.collect.Sets;
import io.mycat.MycatServer;
import io.mycat.backend.BackendConnection;
import io.mycat.config.loader.zkprocess.comm.ZkConfig;
import io.mycat.config.loader.zkprocess.comm.ZkParamCfg;
import io.mycat.net.NIOProcessor;
import io.mycat.route.RouteCheckRule;
import io.mycat.route.RouteResultset;
import io.mycat.route.RouteResultsetNode;
import io.mycat.route.function.PartitionByCRC32PreSlot;
import io.mycat.util.ZKUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
/**
* Created by nange on 2016/12/20.
*/
public class SwitchPrepareCheckRunner implements Runnable {
private static final Logger LOGGER = LoggerFactory.getLogger(SwitchPrepareListener.class);
public static Set<String> allSwitchRunnerSet= Sets.newConcurrentHashSet();
private String taskID;
private String taskPath;
private TaskNode taskNode;
private List<PartitionByCRC32PreSlot.Range> rangeList;
public SwitchPrepareCheckRunner( String taskID, String taskPath,
TaskNode taskNode,List<PartitionByCRC32PreSlot.Range> rangeList) {
this.taskID = taskID;
this.taskPath = taskPath;
this.taskNode = taskNode;
this.rangeList=rangeList;
}
@Override public void run() {
if(!allSwitchRunnerSet.contains(taskID)){
return;
}
ScheduledExecutorService scheduledExecutorService= MycatServer.getInstance().getScheduler();
ConcurrentMap<String, ConcurrentMap<String, List<PartitionByCRC32PreSlot.Range>>> migrateRuleMap = RouteCheckRule.migrateRuleMap;
String schemal = taskNode.getSchema().toUpperCase();
if(!migrateRuleMap.containsKey(schemal)||!migrateRuleMap.get(
schemal).containsKey(taskNode.getTable().toUpperCase())){
scheduledExecutorService.schedule(this,3, TimeUnit.SECONDS);
return;
}
boolean isHasInTransation=false;
NIOProcessor[] processors=MycatServer.getInstance().getProcessors();
for (NIOProcessor processor : processors) {
Collection<BackendConnection> backendConnections= processor.getBackends().values();
for (BackendConnection backendConnection : backendConnections) {
isHasInTransation= checkIsInTransation(backendConnection);
if(isHasInTransation){
scheduledExecutorService.schedule(this,3, TimeUnit.SECONDS);
return;
}
}
}
for (BackendConnection backendConnection : NIOProcessor.backends_old) {
isHasInTransation= checkIsInTransation(backendConnection);
if(isHasInTransation){
scheduledExecutorService.schedule(this,3, TimeUnit.SECONDS);
return;
}
}
//增加判断binlog完成
if(!isHasInTransation){
try {
//先判断后端binlog都完成了才算本任务完成
boolean allIncrentmentSucess=true;
List<String> dataHosts= ZKUtils.getConnection().getChildren().forPath(taskPath);
for (String dataHostName : dataHosts) {
if("_prepare".equals(dataHostName)||"_commit".equals(dataHostName)||"_clean".equals(dataHostName))
continue;
List<MigrateTask> migrateTaskList= JSON
.parseArray(new String(ZKUtils.getConnection().getData().forPath(taskPath+"/"+dataHostName),"UTF-8") ,MigrateTask.class);
for (MigrateTask migrateTask : migrateTaskList) {
String zkPath =taskPath+"/"+dataHostName+ "/" + migrateTask.getFrom() + "-" + migrateTask.getTo();
if (ZKUtils.getConnection().checkExists().forPath(zkPath) != null) {
TaskStatus taskStatus = JSON.parseObject(
new String(ZKUtils.getConnection().getData().forPath(zkPath), "UTF-8"), TaskStatus.class);
if (taskStatus.getStatus() != 3) {
allIncrentmentSucess=false;
break;
}
}else{
allIncrentmentSucess=false;
break;
}
}
}
if(allIncrentmentSucess) {
//需要关闭binlog，不然后续的清楚老数据会删除数据
BinlogStream stream= BinlogStreamHoder.binlogStreamMap.get(taskID);
if(stream!=null){
BinlogStreamHoder.binlogStreamMap.remove(taskID);
stream.disconnect();
}
String myID = ZkConfig.getInstance().getValue(ZkParamCfg.ZK_CFG_MYID);
String path = taskPath + "/_commit/" + myID;
if (ZKUtils.getConnection().checkExists().forPath(path) == null) {
ZKUtils.getConnection().create().creatingParentsIfNeeded().forPath(path);
}
allSwitchRunnerSet.remove(taskID);
} else {
scheduledExecutorService.schedule(this,3, TimeUnit.SECONDS);
}
} catch (Exception e) {
LOGGER.error("error:",e);
}
}
}
private boolean checkIsInTransation(BackendConnection backendConnection) {
if(!taskNode.getSchema().equalsIgnoreCase(backendConnection.getSchema()))
return false;
Object attach= backendConnection.getAttachment();
if(attach instanceof RouteResultsetNode) {
RouteResultsetNode resultsetNode= (RouteResultsetNode) attach;
RouteResultset rrs= resultsetNode.getSource();
for (String table : rrs.getTables()) {
if(table.equalsIgnoreCase(taskNode.getTable())) {
int slot = resultsetNode.getSlot();
if(slot <0&&resultsetNode.isUpdateSql())
{
return true;
} else if(resultsetNode.isUpdateSql()) {
for (PartitionByCRC32PreSlot.Range range : rangeList) {
if(slot>=range.start&&slot<=range.end){
return true;
}
}
}
}
}
}
return false;
}
}