Package org.apache.iotdb.confignode.manager

Class TriggerManager

java.lang.Object

org.apache.iotdb.confignode.manager.TriggerManager

public class TriggerManager
extends Object

Constructor Summary

Constructors

Constructor	Description
TriggerManager(ConfigManager configManager, TriggerInfo triggerInfo)

Method Summary

Modifier and Type	Method	Description
TSStatus	createTrigger(TCreateTriggerReq req)	Create a trigger in cluster.
TSStatus	dropTrigger(TDropTriggerReq req)
TGetLocationForTriggerResp	getLocationOfStatefulTrigger(String triggerName)
TriggerInfo	getTriggerInfo()
TGetJarInListResp	getTriggerJar(TGetJarInListReq req)
TGetTriggerTableResp	getTriggerTable(boolean onlyStateful)
TSStatus	transferTrigger(List<TDataNodeLocation> newUnknownDataNodeList, Map<Integer,TDataNodeLocation> dataNodeLocationMap)	Step1: Mark Stateful Triggers on UnknownDataNodes as TTriggerState.TRANSFERRING.
List<TSStatus>	updateTriggerLocation(String triggerName, TDataNodeLocation dataNodeLocation, Map<Integer,TDataNodeLocation> dataNodeLocationMap)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

TriggerManager

public TriggerManager(ConfigManager configManager,
 TriggerInfo triggerInfo)

Method Details

getTriggerInfo

public TriggerInfo getTriggerInfo()

createTrigger

public TSStatus createTrigger(TCreateTriggerReq req)

Create a trigger in cluster.

If TriggerType is STATELESS, we should create TriggerInstance on all DataNodes, the DataNodeLocation in TriggerInformation will be null.

If TriggerType is STATEFUL, we should create TriggerInstance on the DataNode with the lowest load, and DataNodeLocation of this DataNode will be saved.

All DataNodes will add TriggerInformation of this trigger in local TriggerTable.

Parameters:

req - the createTrigger request

Returns:

status of create this trigger

dropTrigger

public TSStatus dropTrigger(TDropTriggerReq req)

getTriggerTable

public TGetTriggerTableResp getTriggerTable(boolean onlyStateful)

getLocationOfStatefulTrigger

public TGetLocationForTriggerResp getLocationOfStatefulTrigger(String triggerName)

getTriggerJar

public TGetJarInListResp getTriggerJar(TGetJarInListReq req)

transferTrigger

public TSStatus transferTrigger(List<TDataNodeLocation> newUnknownDataNodeList,
 Map<Integer,TDataNodeLocation> dataNodeLocationMap)

Step1: Mark Stateful Triggers on UnknownDataNodes as TTriggerState.TRANSFERRING.

Step2: Get all Transferring Triggers marked in Step1.

Step3: For each trigger gotten in Step2, find the DataNode with the lowest load, then transfer the Stateful Trigger to it and update this information on all DataNodes.

Step4: Update the newest location on ConfigNodes.

Parameters:

dataNodeLocationMap - The DataNodes with NodeStatus.Running State

Returns:

result of transferTrigger

updateTriggerLocation

public List<TSStatus> updateTriggerLocation(String triggerName,
 TDataNodeLocation dataNodeLocation,
 Map<Integer,TDataNodeLocation> dataNodeLocationMap)