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Re: [ecf-dev] Tracking usage of Remote Service at Serverside
- From: Scott Lewis <slewis@xxxxxxxxxxxxx>
- Date: Thu, 17 Dec 2015 09:54:13 -0800
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On 12/17/2015 3:58 AM, Peter Hermsdorf wrote:
i tries that and i'm getting a ExportReference for every exported
service, but the information I'm seeking seems not to be in there.
Basically there is only the EndpointDescription of the exported Servie
and the service itself in there.
Yes. One of the things I recently added to ECF's RSA implementation was
the ability to get more information from the ExportReference (i.e. more
than is specified by RSA ExportReference class). Specifically, see:
The getExportedServices() method returns instances of
RemoteServiceAdmin.ExportReference. And there are is also method on
RemoteServiceAdmin.getExportedRegistrations() which returns instances of
RemoteServiceAdmin.ExportRegistration. SObviously, these are ECF
You will notice that the ECF RemoteServiceAdmin.ExportReference has
methods: getContainerID() and getRemoteServiceId().
It's also possible to receive either synchronous or asynchronous
notifications from the RemoteServiceAdmin service using the
RemoteServiceAdminListener and RemoteServiceAdminEvent.
same here. I see no event on server side when a client connects or
What I'm looking for is the number of connected clients (in other
words: the number of times the service has been imported by a client)
and preferable the ip and/or hostname of the client(s).
I see. So there is no standardized AP for that (yet). It's possible
that it would be added, but so far I've not seen any discussion about it
in the EEG. I would happily bring it up for possible standardization,
but I can't commit the necessary personal resources right now.
In any event, there are ways to get to it with ECF-generic-provider
specific APIs, and I think that's what you are using.
Let me try to help guide that:
The generic provider server is based upon this class:
As you can see, it implements
What this means is that if you can get the IContainer instance on the
server (which you should be able to via the IContainerManager service),
then you can adapt it to the ISharedObjectContainerGroupManager...e.g.
ISharedObjectContainerGroupManager cgm =
Note that if it's not a generic provider (e.g. rosgi or any other)
getAdapter will return null.
The ISharedObjectContainerGroupManager has a method:
setConnectPolicy(IConnectHandlerPolicy policy) which will be called when
clients connect...with information about their tcpip address, their id, etc.
There is another adapter for IContainer:
org.eclipse.ecf.core.IReliableContainer all generic provider servers
and clients implement this, so you should also be able to do:
IReliableContainer rc = (IReliableContainer)
and get a non-null rc.
IReliableContainer has a method: IReliableContainer.getGroupMemberIDs()
that has returns an ID. These are all of the current group members
(clients and server in TCP). You can associate the information gained
in IConnectHandlerPolicy (address, etc) with the ID in the ID.
I and Wim have been thinking about adding API (and impl) to allow easier
access to statistics about remote services (e.g. like client info, usage
info, etc). But we haven't gotten to it yet. If I can find someone
to support it with my time, I would happily do it (and even suggest
standardization in future versions of RSA via the EEG).
Note that there are also container events that are delivered to any
listeners (via IContainer.addContainerListener). That's perhaps more
involved so I'll leave it at that for now.
Let me know if this helps and we will discuss further if necessary.
Maybe I have misunderstood your suggestions ;)
Any more hints on this would be great!
BTW: I'm using ECF 3.9.3
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