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Re: [ecf-dev] Fun with remote services part 1
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Hi Eugen,
There are ds-based host and consumer examples...in bundles
org.eclipse.ecf.examples.remoteservices.hello.ds.host
org.eclipse.ecf.examples.remoteservices.hello.ds.consumer
There are product configurations in these two bundles for the zeroconf
(discovery), and ECF generic (distribution) providers. It is a simple
matter to create product configurations that use (e.g.) zookeeper for
discovery (rather than zeroconf), and other providers for distribution
(e.g. r-osgi, etc)...and I would encourage others to make contributions
to add to these examples. Either that, or sponsor ECF committers to
make such additions.
Note that although Bryan's blog posting from 6/2009 was excellent, I
don't think it is quite up-to-date...as much has changed since his blog
post...in the OSGi 4.2 standard (now remote services rather than
rfc119...a very different specification...in everything from service
property names to specified behavior of implementations), as well as a
completely different implementation of the remote services standard from
ECF. For example, it's no longer necessary to create instances of ECF
containers explicitly (rather they can be constructed implicitly upon
remote service registration and/or discovery).
In addition, I will do some blogging about DS and ECF remote services
hello example in the near future. The short story is this though: use
of DS for remote services is now essentially the same as using DS for
other OSGi services...except that remote services are generally more
dynamic (because of network discovery like zeroconf, zookeeper, etc),
and they generally are not singletons (i.e. cardinality is typically
0..n...since there can typically be more than one remote host for a
given service).
BTW, WRT XMPP...there was a bug reported just last week having to do
with the way that ECF was handling the gmail client resource identifier
in the XMPP provider:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=316071
There is a patch by me on that bug that most likely fixes the issue, but
it has not yet been verified...and given that we are approaching Helios
release and under a change freeze imposed by the Helios release process,
this fix will *not* be in the Helios release (but of course, will be in
all future ECF releases as soon as the fix is verified and released to
HEAD).
Scott
Eugen Reiswich wrote:
Hi Wim,
I checked out your example but was not able to find any service
components within the bundles. I've imported the .psf files but the
projects don't have DS. I've also checked out some other postings on
ECF with DS
(http://bryanhunt.wordpress.com/2009/06/20/remote-declarative-osgi-services/)
but this example only works if client and server run on the same local
subnet.
There are some more blogs about ECF and remote services
e.g. http://wiki.eclipse.org/Getting_Started_with_ECF's_OSGi_Remote_Services_Implementation
<http://wiki.eclipse.org/Getting_Started_with_ECF%27s_OSGi_Remote_Services_Implementation>
but none of them describes how to create and use remote services with DS.
Hence it is still not clear for me how to use ECF remote services with
DS. In my special case I try to use ECF remote services with XMPP.
Regards,
Eugen
Am Jun 11, 2010 um 13:12 schrieb Wim Jongman:
Eugen,
Check out our latest article. It is all DS! I will blog about the
server/host part this weekend. Be sure to check out the client and
give it a spin:
*http://tiny.cc/remotefun*
Regards,
Wim
On Fri, Jun 11, 2010 at 9:30 AM, Eugen Reiswich
<ereiswich@xxxxxxxxxxxxxx <mailto:ereiswich@xxxxxxxxxxxxxx>> wrote:
> Hi Scott,
>
> I would like to hear about (remote) declarative services (DS) with ECF.
>
> Regards,
> Eugen
>
> Am Jun 11, 2010 um 5:14 schrieb Scott Lewis:
>
>> Really nice article Wim. Congrats...and many thanks!
>>
>> I'll try to add next week to the do-it-yourself-marketing-of-ECF
remote services. Any suggestions from people about about a specific
topic that people might like to hear some about?
>>
>> Scott
>>
>>
>> Wim Jongman wrote:
>>> Hi,
>>>
>>> I have blogged about ecf and zoodiscovery:http://tiny.cc/remotefun
>>>
>>> Regards,
>>>
>>> Wim
>>> _______________________________________________
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>>>
>>
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