com.haulmont.cuba.core.app

Interface ClusterListener<T>

Type Parameters:

T - type of message this listener receives

All Known Implementing Classes:

ClusterListenerAdapter, LockManager

public interface ClusterListener<T>

Interface to be implemented by middleware cluster listeners. A cluster listener receives messages from other nodes in the cluster.

Method Summary

Modifier and Type	Method and Description
byte[]	getState() Get state of this cluster node to send it to other nodes.
void	receive(T message) Receive a message from other cluster nodes.
void	setState(byte[] state) Set state of this cluster node receiving it from other active node.

Method Detail

receive

void receive(T message)

Receive a message from other cluster nodes.

Parameters:

message - message instance

getState

byte[] getState()

Get state of this cluster node to send it to other nodes. "State" here means data that must be shared between cluster nodes.

This method is invoked by clustering implementation when a new node joins the cluster and wants to receive the state from this active node.

Returns:

byte array containing the state

setState

void setState(byte[] state)

Set state of this cluster node receiving it from other active node. "State" here means data that must be shared between cluster nodes.

This method is invoked by clustering implementation once when this node joins the cluster.

Parameters:

state - byte array containing the state