Package com.github.ambry.clustermap

Interface ClusterAgentsFactory

public interface ClusterAgentsFactory

A factory interface to get cluster agents such as ClusterMap and ClusterParticipant. Each type of agents should be constructed at most once, and only on demand.

Method Summary

Modifier and Type	Method	Description
ClusterMap	getClusterMap()	Construct and return the reference or return the reference to the previously constructed ClusterMap
java.util.List<ClusterParticipant>	getClusterParticipants()	Construct and return the references or return the references to the previously constructed ClusterParticipant(s).

Method Detail

getClusterMap

ClusterMap getClusterMap()
                  throws java.io.IOException

Construct and return the reference or return the reference to the previously constructed ClusterMap

Throws:

java.io.IOException

getClusterParticipants

java.util.List<ClusterParticipant> getClusterParticipants()
                                                   throws java.io.IOException

Construct and return the references or return the references to the previously constructed ClusterParticipant(s). We extend this method to support multiple participants on same node. In some special cases (i.e. migrating cluster to another Zookeeper), we require a data node to participate into multiple ZK clusters and each participant interacts with corresponding ZK independently.

Returns:

a list of ClusterParticipant(s) on current node.

Throws:

java.io.IOException