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TIBCO Rendezvous® 8.7.0

# GroupStateChangedEventHandler

Delegate

## Visual Basic

    Public Delegate Sub GroupStateChangedEventHandler (
        ByVal monitor As Object,
        ByVal groupStateChangedEventArgs
                As GroupStateChangedEventArgs )

## C#

    public delegate void GroupStateChangedEventHandler (
        object monitor,
        GroupStateChangedEventArgs groupStateChangedEventArgs );

## Purpose

Process fault tolerance events for a monitor.

Parameter | Description
``monitor`` | This parameter receives the monitor object.
``groupStateChangedEventArgs`` | This parameter receives the closure and the number of active group members.

## Implementation

Rendezvous fault tolerance software queues a monitor event whenever the number of active members in the group changes. Programs can define this delegate to handle such events, and register it in a call to `FTGroupMonitor.`

A program need not be a member of a group in order to monitor that group. Programs that do not monitor need not define a monitor callback method.

## See Also

FTGroupMonitor

GroupStateChangedEventArgs

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