Package org.apache.druid.rpc

Class FixedSetServiceLocator

java.lang.Object

org.apache.druid.rpc.FixedSetServiceLocator

All Implemented Interfaces:

Closeable, AutoCloseable, ServiceLocator

public class FixedSetServiceLocator
extends Object
implements ServiceLocator

Basic implmentation of ServiceLocator that returns a service location from a static set of locations. Returns a random location each time one is requested.

Method Summary

Modifier and Type	Method	Description
void	close()
static FixedSetServiceLocator	forDruidServerMetadata(Set<DruidServerMetadata> serverMetadataSet)
static FixedSetServiceLocator	forServiceLocation(@NotNull ServiceLocation serviceLocation)
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

Method Detail

forServiceLocation

public static FixedSetServiceLocator forServiceLocation(@NotNull
                                                        @NotNull ServiceLocation serviceLocation)

forDruidServerMetadata

public static FixedSetServiceLocator forDruidServerMetadata(Set<DruidServerMetadata> serverMetadataSet)

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 AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface ServiceLocator