org.apache.apex.malhar.flume.discovery

Interface Discovery<T>

Type Parameters:

T - - Type of the objects which can be discovered

All Known Implementing Classes:

AbstractFlumeInputOperator.ZKStatsListner, ZKAssistedDiscovery

public interface Discovery<T>

When FlumeSink server instance binds to the network interface, it can publish its whereabouts by invoking advertise method on the Discovery object. Similarly when it ceases accepting any more connections, it can publish its intent to do so by invoking unadvertise.

Interesting parties can call discover method to get the list of addresses where they can find an available FlumeSink server instance.

Since:

0.9.3

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Discovery.Service<T>

Method Summary

Methods

Modifier and Type	Method and Description
void	advertise(Discovery.Service<T> service) Advertise the host/port address where FlumeSink is accepting a client connection.
Collection<Discovery.Service<T>>	discover() Discover all the addresses which are actively accepting the client connections.
void	unadvertise(Discovery.Service<T> service) Recall the previously published address as it's no longer valid.

Method Detail

unadvertise

void unadvertise(Discovery.Service<T> service)

Recall the previously published address as it's no longer valid.

Parameters:

service -

advertise

void advertise(Discovery.Service<T> service)

Advertise the host/port address where FlumeSink is accepting a client connection.

Parameters:

service -

discover

Collection<Discovery.Service<T>> discover()

Discover all the addresses which are actively accepting the client connections.

Returns:

- Active server addresses which can accept the connections.