Package org.apache.druid.server.coordinator.loading

Class LoadQueueTaskMaster

java.lang.Object

org.apache.druid.server.coordinator.loading.LoadQueueTaskMaster

public class LoadQueueTaskMaster
extends Object

Provides LoadQueuePeons

Constructor Summary

Constructors

Constructor	Description
LoadQueueTaskMaster(com.google.inject.Provider<org.apache.curator.framework.CuratorFramework> curatorFrameworkProvider, com.fasterxml.jackson.databind.ObjectMapper jsonMapper, ScheduledExecutorService peonExec, ExecutorService callbackExec, DruidCoordinatorConfig config, org.apache.druid.java.util.http.client.HttpClient httpClient, ZkPathsConfig zkPaths)

Method Summary

Modifier and Type	Method	Description
Map<String,LoadQueuePeon>	getAllPeons()
LoadQueuePeon	getPeonForServer(ImmutableDruidServer server)
boolean	isHttpLoading()
void	onLeaderStart()
void	onLeaderStop()	Stops and removes all peons.
void	resetPeonsForNewServers(List<ImmutableDruidServer> currentServers)	Creates a peon for each of the given servers, if it doesn't already exist and removes peons for servers not present in the cluster anymore.

Methods inherited from class java.lang.Object

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

Constructor Detail

LoadQueueTaskMaster

public LoadQueueTaskMaster(com.google.inject.Provider<org.apache.curator.framework.CuratorFramework> curatorFrameworkProvider,
                           com.fasterxml.jackson.databind.ObjectMapper jsonMapper,
                           ScheduledExecutorService peonExec,
                           ExecutorService callbackExec,
                           DruidCoordinatorConfig config,
                           org.apache.druid.java.util.http.client.HttpClient httpClient,
                           ZkPathsConfig zkPaths)

Method Detail

getAllPeons

public Map<String,LoadQueuePeon> getAllPeons()

getPeonForServer

public LoadQueuePeon getPeonForServer(ImmutableDruidServer server)

resetPeonsForNewServers

public void resetPeonsForNewServers(List<ImmutableDruidServer> currentServers)

Creates a peon for each of the given servers, if it doesn't already exist and removes peons for servers not present in the cluster anymore.

This method must not run concurrently with onLeaderStart() and onLeaderStop() so that there are no stray peons if the Coordinator is not leader anymore.

onLeaderStart

public void onLeaderStart()

onLeaderStop

public void onLeaderStop()

Stops and removes all peons.

isHttpLoading

public boolean isHttpLoading()