com.kabira.platform.highavailability

Class PartitionNotifier

java.lang.Object

com.kabira.platform.highavailability.PartitionNotifier

@Managed
public abstract class PartitionNotifier
extends java.lang.Object

The PartitionNotifier class. This managed class is extended by applications in order to get notifications of partition state changes. Note that applications should never define fields in the subclass to avoid any transaction locks.

Constructor Summary

Constructors

Constructor and Description
PartitionNotifier()

Method Summary

Modifier and Type	Method and Description
protected abstract void	stateChange(java.lang.String partitionName, Partition.State oldState, Partition.State newState) Called when a partition state change happens.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PartitionNotifier

public PartitionNotifier()

Method Detail

stateChange

protected abstract void stateChange(java.lang.String partitionName,
                                    Partition.State oldState,
                                    Partition.State newState)

Called when a partition state change happens.

Parameters:

partitionName - The name of partition that changed.

oldState - The old partition state

newState - The new partition state

This operation is called whenever a partition has a change in the partition State. The notifier is called on all remote nodes where a notifier instance is defined via Partition.setNotifier(com.kabira.platform.highavailability.PartitionNotifier).

Partition state changes are never lost, and called in the order that the state changes occur. Since accessing a Partition instance via PartitionManager.getPartition(java.lang.String) will contain a snapshot of the partition state, this method passes in the old and new states.