org.apache.druid.rpc

Interface ServiceLocator

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

DiscoveryServiceLocator, SpecificTaskServiceLocator

public interface ServiceLocator
extends Closeable

Used by ServiceClient to locate services. Thread-safe.

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.

Method Detail

locate

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

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.

close

void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable