public interface StateChangeListener
Stateof the replicated environment and choosing how to route database operations.
Statedetermines which operations are currently permitted on the node. For example, only the
MASTERnode can execute write operations.
The Listener is registered with the replicated environment using
is at most one Listener associated with the actual environment (not an
Environment handle) at any given instance in time.
See the examples for information on different approaches toward routing database operations and an example of using the StateChangeListener.
void stateChange(StateChangeEvent stateChangeEvent) throws RuntimeException
StateChangeListeneris first associated with the
ReplicatedEnvironment.setStateChangeListener(StateChangeListener)method and subsequently each time there is a state change.
This method should do the minimal amount of work, queuing any resource intensive operations for processing by another thread before returning to the caller, so that it does not unduly delay the other housekeeping operations performed by the internal thread which invokes this method.
stateChangeEvent- the new state change event
RuntimeException- Any uncaught exceptions will result in the shutdown of the ReplicatedEnvironment.
Copyright (c) 2002, 2017 Oracle and/or its affiliates. All rights reserved.