Package org.apache.druid.segment.realtime.firehose

Class ServiceAnnouncingChatHandlerProvider

java.lang.Object

org.apache.druid.segment.realtime.firehose.ServiceAnnouncingChatHandlerProvider

All Implemented Interfaces:

ChatHandlerProvider

public class ServiceAnnouncingChatHandlerProvider
extends Object
implements ChatHandlerProvider

Provides a way for the outside world to talk to objects in the indexing service. The get(String) method allows anyone with a reference to this object to obtain a particular ChatHandler. An embedded ServiceAnnouncer will be used to advertise handlers on this host.

Constructor Summary

Constructors

Constructor	Description
ServiceAnnouncingChatHandlerProvider(DruidNode node, ServiceAnnouncer serviceAnnouncer)

Method Summary

Modifier and Type	Method	Description
com.google.common.base.Optional<ChatHandler>	get(String key)	Retrieves a chat handler.
void	register(String service, ChatHandler handler)	Registers a chat handler which provides an API for others to talk to objects in the indexing service.
void	register(String service, ChatHandler handler, boolean announce)	Registers a chat handler which provides an API for others to talk to objects in the indexing service.
void	unregister(String service)	Unregisters a chat handler.

Methods inherited from class java.lang.Object

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

Constructor Detail

ServiceAnnouncingChatHandlerProvider

@Inject
public ServiceAnnouncingChatHandlerProvider(DruidNode node,
                                            ServiceAnnouncer serviceAnnouncer)

Method Detail

register

public void register(String service,
                     ChatHandler handler)

Description copied from interface: ChatHandlerProvider

Registers a chat handler which provides an API for others to talk to objects in the indexing service. Depending on the implementation, this method may also announce this node so that it can be discovered by other services.

Specified by:

register in interface ChatHandlerProvider

Parameters:

service - a unique name identifying this service

handler - instance which implements the API to be exposed

register

public void register(String service,
                     ChatHandler handler,
                     boolean announce)

Description copied from interface: ChatHandlerProvider

Registers a chat handler which provides an API for others to talk to objects in the indexing service. Setting announce to false instructs the implementation to only register the handler to expose the API and skip any discovery announcements that might have been broadcast.

Specified by:

register in interface ChatHandlerProvider

Parameters:

service - a unique name identifying this service

handler - instance which implements the API to be exposed

announce - for implementations that have a service discovery mechanism, whether this node should be announced

unregister

public void unregister(String service)

Description copied from interface: ChatHandlerProvider

Unregisters a chat handler.

Specified by:

unregister in interface ChatHandlerProvider

Parameters:

service - the name of the service

get

public com.google.common.base.Optional<ChatHandler> get(String key)

Description copied from interface: ChatHandlerProvider

Retrieves a chat handler.

Specified by:

get in interface ChatHandlerProvider

Parameters:

key - the name of the service