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Re: [ecf-dev] Debug ECF remote services
- From: Scott Lewis <slewis@xxxxxxxxxxxxx>
- Date: Thu, 01 Jul 2010 11:46:55 -0700
- Delivered-to: firstname.lastname@example.org
- User-agent: Thunderbird 18.104.22.168 (Windows/20100228)
At this point, the debug support for remote services is indeed minimal.
The reason it's minimal is not that it's not recognized as important (by
me and/or other committers), but rather because the project hasn't had
enough resources to develop these pieces...and the associated
tooling/user interfaces...alongside the (necessary) work on the remote
services runtime, provider impls, and example code and docs that we've
done over the past year.
There are, however, a number of runtime hooks that can be used for
debugging of remote service registration and lookup...as you are
apparently trying to do. Because of the above resource limitations, as
of right now these are admittedly runtime hooks rather than full debug
tools. Further, Markus Kuppe has already done some work on creating a
test/debug environment specifically for remote services (think junit
testing of remote services). I would love to see contribution or
support for existing committers for the development of full debug tools
and a full remote services testing approach...and this is indeed quite
doable given the ECF runtime support. I would encourage people to open
enhancement requests in specific areas (e.g. discovery, remote
services/distribution, specific providers, rest remote services, etc)
that are of particular interest given their use cases and environments.
That way we can address the needs as directly as possible.
Below are some of the runtime hooks for the ECF remote services API
specifically . There are also runtime hooks for the discovery API, as
well as for the OSGi Remote Services implementation (for both discovery
and distribution). I won't list those hooks here, but some of them are
listed on this wiki page:
For the ECF remote services API, however, see these hooks:
IRemoteServiceContainerAdapter.addRemoteServiceListener: It's possible
to add listeners to remote service events...e.g. registration,
possible to get parts/all of the local remote service registry.
These two hooks pretty much parallel what the OSGi service registry
does...and this is how (for example) the OSGi console prints out
information about the OSGi service registry (e.g. the list of OSGi
services). There can/could be console commands created for displaying
these things, but the remote service console commands have not yet been
created (although there is, in ECF 3.3, a few new ECF console
commands...around the use of the IContainerManager service, and there is
a new ConsoleProvider in org.eclipse.ecf.console bundle [new to 3.3]).
Also...for most providers there is access to tracing/debug output (i.e.
debug options), that will produce tracing output for various
provider-specific activities. For example, the
org.eclipse.ecf.provider.remoteservice bundle (which has the impl of the
remote service API for the XMPP as well as the generic provider) can
produce a fair amount of tracing output. If you want to see specifics
about the tracing for the various providers, you can easily consult the
.options file in the root for each of the associated projects).
Eugen Reiswich wrote:
I'm trying now for month to get a simple ECF remote services example run over XMPP. I've read almost every ECF article but it still doesn't work. My problem is that I don't know how to debug my ECF code. The task is very simple. I got two clients userA and userB. What I need two know is did the remote service registration work properly. Example:
1. userA publishes a remote service to userB -> my questions:
a) did the publishing stuff for userA work properly with ECF
b) can userB use the service published by userA
In OSGi I can use the console to debug service registrations etc. In ECF I'm hitting the wall over and over and just don't know whether: my code is buggy or ECF is buggy? When I try to retrieve previously registered services the result array is always empty.
Any help will be appreciated.
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