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On 12/18/2015 7:18 AM, Peter Hermsdorf
wrote:
in the end it got simple. in the MXBean i let inject
IContainerManager and then use:
@Override
public int getConnectedClients() {
if (containerManager == null) {
return 0;
}
final Set<ID> clientIDs = new HashSet<ID>();
for (final IContainer container :
containerManager.getAllContainers()) {
final IReliableContainer rc = (IReliableContainer)
container.getAdapter(IReliableContainer.class);
clientIDs.addAll(Arrays.asList(rc.getGroupMemberIDs()));
}
return clientIDs.size() -
containerManager.getAllContainers().length;
}
Of cource the "server" sort out also could have done by comparing
the ID's of the container with the ones in the GroupMember List
but I think that should work too.
The IConnectHandlerPolicy variant was not enough in this case,
because i couldn't track a disconnect of clients this way.
Scott, thanks again for your pleasant help and support on this!
Sure. One thing to watch out for...it's possible that the call to
(IReliableContainer) container.getAdapter(IReliableContainer.class)
might return null (e.g. in the future), so you might want to test
for null before executing the next line.
Merry Xmas to everyone
To amplify Peter's sentiment: Happy Holidays all.
Scott
bye, peter
Am 17.12.2015 um 18:54 schrieb Scott
Lewis:
T
Hi Peter,
On 12/17/2015 3:58 AM, Peter Hermsdorf wrote:
<stuff deleted>
Collection<ExportReference> getExportedServices();
Collection<ImportReference> getImportedServices();
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:
http://download.eclipse.org/rt/ecf/3.12.0/javadoc/org/eclipse/ecf/osgi/services/remoteserviceadmin/RemoteServiceAdmin.html
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 only/not standardized.
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 disconnects.
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:
org.eclipse.ecf.provider.generic.ServerSOContainer
As you can see, it implements
org.eclipse.ecf.core.sharedobject.ISharedObjectContainerGroupManager.
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 =
(ISharedObjectContainerGroupManager)
container.getAdapter(ISharedObjectContainerGroupManager.class);
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)
container.getAdapter(IReliableContainer.class);
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.
Scott
Maybe I have misunderstood your suggestions ;)
Any more hints on this would be great!
Thank you!
bye, peter
BTW: I'm using ECF 3.9.3
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--
Mit
freundlichen Grüßen,
Peter Hermsdorf
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