org.apache.druid.rpc.indexing

Class SpecificTaskServiceLocator

java.lang.Object

org.apache.druid.rpc.indexing.SpecificTaskServiceLocator

All Implemented Interfaces:

Closeable, AutoCloseable, ServiceLocator

public class SpecificTaskServiceLocator
extends Object
implements ServiceLocator

Service locator for a specific task. Uses the OverlordClient.taskStatus(java.lang.String) API to locate tasks. This locator has an internal cache that is updated if the last check has been over LOCATION_CACHE_MS ago. This locator is Closeable, like all ServiceLocators, but it is not essential that you actually close it. Closing does not free any resources: it merely makes future calls to locate() return ServiceLocations.closed().

Constructor Summary

Constructors

Constructor and Description
SpecificTaskServiceLocator(String taskId, OverlordClient overlordClient)

Method Summary

Modifier and Type	Method and Description
void	close()
com.google.common.util.concurrent.ListenableFuture<ServiceLocations>	locate() Returns a future that resolves to a set of ServiceLocation.

Methods inherited from class java.lang.Object

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

Constructor Detail

SpecificTaskServiceLocator

public SpecificTaskServiceLocator(String taskId,
                                  OverlordClient overlordClient)

Method Detail

locate

public com.google.common.util.concurrent.ListenableFuture<ServiceLocations> locate()

Description copied from interface: ServiceLocator

Returns a future that resolves to a set of ServiceLocation. If the returned object returns true from ServiceLocations.isClosed(), it means the service has closed permanently. Otherwise, any of the returned locations in ServiceLocations.getLocations() is a viable selection. It is possible for the list of locations to be empty. This means that the service is not currently available, but also has not been closed, so it may become available at some point in the future.

Specified by:

locate in interface ServiceLocator

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface ServiceLocator