com.hazelcast.spi.discovery

Interface DiscoveryStrategy

All Known Implementing Classes:

AbstractDiscoveryStrategy

@Beta
public interface DiscoveryStrategy

The DiscoveryStrategy itself is the actual implementation to discover nodes based on whatever environment is used to run the Hazelcast cloud. The internal implementation is completely vendor specific and might use external Java libraries to query APIs or send requests to a external REST service.

DiscoveryStrategies are also free to define any kind of properties that might be necessary to discover eligible nodes based on configured attributes, tags or any other kind of metadata.

Using the simple lifecycle management strategies like multicast discovery is able to register and destroy sockets based on Hazelcast’s lifecycle. Deactivated services will also never be started.

Since:

3.6

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy() The stop method is used to stop internal services, sockets or to destroy any kind of internal state.
Iterable<DiscoveryNode>	discoverNodes() Returns a set of all discovered nodes based on the defined properties that were used to create the DiscoveryStrategy instance.
void	start() The start method is used to initialize internal state and perform any kind of startup procedure like multicast socket creation.

Method Detail

start

void start()

The start method is used to initialize internal state and perform any kind of startup procedure like multicast socket creation. The behavior of this method might change based on the DiscoveryNode instance passed to the DiscoveryStrategyFactory.

discoverNodes

Iterable<DiscoveryNode> discoverNodes()

Returns a set of all discovered nodes based on the defined properties that were used to create the DiscoveryStrategy instance.

Returns:

a set of all discovered nodes

destroy

void destroy()

The stop method is used to stop internal services, sockets or to destroy any kind of internal state.