org.wso2.broker.coordination

Interface HaStrategy

All Known Implementing Classes:

AbstractHaStrategy, RdbmsHaStrategy

public interface HaStrategy

Representation of the HA strategy.

Method Summary

Modifier and Type	Method and Description
boolean	isActiveNode() Method to identify if the local node is the active node.
void	registerListener(HaListener haListener, int priority) Method to register a listener to listen on notifications for node state changes with priority level.
void	setup(org.wso2.broker.common.StartupContext startupContext) Setup based on StartupContext if required (eg:- read configs).
void	start() Meant to be invoked when the HA strategy should start.
void	stop() Meant to be invoked when the HaStrategy should stop.
void	unregisterListener(HaListener haListener) Method to unregister a listener registered to listen on notifications for node state changes.

Method Detail

setup

void setup(org.wso2.broker.common.StartupContext startupContext)
    throws Exception

Setup based on StartupContext if required (eg:- read configs).

Parameters:

startupContext - the startup context from which registered services can be retrieved

Throws:

Exception

start

void start()

Meant to be invoked when the HA strategy should start.

stop

void stop()

Meant to be invoked when the HaStrategy should stop.

isActiveNode

boolean isActiveNode()

Method to identify if the local node is the active node.

registerListener

void registerListener(HaListener haListener,
                      int priority)

Method to register a listener to listen on notifications for node state changes with priority level.

Parameters:

haListener - the HaListener to register

priority - the priority level when notifying node state changes to the haListener

unregisterListener

void unregisterListener(HaListener haListener)

Method to unregister a listener registered to listen on notifications for node state changes.

Parameters:

haListener - the HaListener to unregister