Re: [ecf-dev] get Participants in ECF application‏

[Scott Lewis <slewis@xxxxxxxxxxxxxxxxx>]

Hi Fernando,

Fernando Gallego wrote:
> Hi, I'm working on an application with ECF. I have a container with an 
> adapter (IChannelContainerAdapter) and wanted to know how to get the 
> number of participants connected at a given time (ie just after 
> connecting a participant).
>
> I tried to IChatRoomInfo and IChatRoomContainer but the result is 
> NullpointerException.

The proper adapter to look for for reporting group membership is 
org.eclipse.ecf.core.IReliableContainer.   Note this adapter has a 
method getGroupMemberIDs() that reports the IDs of known connected 
containers (the group membership).

Not all providers implement IReliableContainer, so they can/could return 
null to:

IReliableContainer reliableContainer = (IReliableContainer) 
container.getAdapter(IReliableContainer.class);

but in practice since many of the providers also implement 
ISharedObjectContainer (and ISharedObjectContainer extends 
IReliableContainer), many of the existing implementers of 
IChannelContainerAdapter also implement IReliableContainer).

Scott