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Posted to users@felix.apache.org by pr...@emc.com on 2010/08/24 13:58:05 UTC
Compendium services implemented by Felix
Hi,
Is there a wiki/web page which lists out the OSGi compendium services
implemented in Apache Felix?
Thanks,
Prakash
Re: Compendium services implemented by Felix
Posted by "Richard S. Hall" <he...@ungoverned.org>.
On 8/24/10 8:58, Steven Siebert wrote:
> Hi Prakash,
>
> The Felix core does not implement any compendium services (that I know of).
> There are several Apache Felix sub projects that do, however. Check them
> out here (http://felix.apache.org/site/index.html) under "Apache Felix
> Subprojects".
To be more precise, there are only Felix subprojects. The Felix
Framework is just one of the many subprojects.
Steve is correct that some of the subprojects implement compendium
specs, but we do not have this information aggregated into a
list...perhaps we should. Subproject names are often similar to the spec
name.
-> richard
> Cheers,
>
> Steve
>
> On Tue, Aug 24, 2010 at 7:58 AM,<pr...@emc.com> wrote:
>
>> Hi,
>>
>>
>>
>> Is there a wiki/web page which lists out the OSGi compendium services
>> implemented in Apache Felix?
>>
>>
>>
>> Thanks,
>>
>> Prakash
>>
>>
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Re: Compendium services implemented by Felix
Posted by "Richard S. Hall" <he...@ungoverned.org>.
On 8/24/10 9:09, prakash.achuthan@emc.com wrote:
> Thanks Steve.
>
> If I look at the subprojects I don't see much of the OSGi Compendium
> services listed there.
> For e.g., User Admin, Wire Admin, Meta Type service ...etc are listed at
> http://felix.apache.org/site/felix-r4-contributions.html
>
> But I don't see it in the subprojects page
> http://felix.apache.org/site/subprojects.html
Metatype is on the subprojects page. Check the trunk for the rest. Not
all subprojects have web pages. I'm not sure of the status of User Admin
and Wire Admin, although both are in trunk.
-> richard
> Thanks,
> Prakash
>
> -----Original Message-----
> From: Steven Siebert [mailto:smsiebe@gmail.com]
> Sent: Tuesday, August 24, 2010 6:28 PM
> To: users@felix.apache.org
> Subject: Re: Compendium services implemented by Felix
>
> Hi Prakash,
>
> The Felix core does not implement any compendium services (that I know
> of).
> There are several Apache Felix sub projects that do, however. Check
> them
> out here (http://felix.apache.org/site/index.html) under "Apache Felix
> Subprojects".
>
> Cheers,
>
> Steve
>
> On Tue, Aug 24, 2010 at 7:58 AM,<pr...@emc.com> wrote:
>
>> Hi,
>>
>>
>>
>> Is there a wiki/web page which lists out the OSGi compendium services
>> implemented in Apache Felix?
>>
>>
>>
>> Thanks,
>>
>> Prakash
>>
>>
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Re: Compendium services implemented by Felix
Posted by Steven Siebert <sm...@gmail.com>.
Very nice.
On Tue, Aug 24, 2010 at 11:08 AM, <pr...@emc.com> wrote:
> Thank you all for the replies.
>
> This the only link on the web which talks about OSGi service
> implementation status of various OSGi projects. Looks like it is the
> updated list.
> http://en.wikipedia.org/wiki/OSGi_Specification_Implementations
>
>
>
> -----Original Message-----
> From: Rodrigo Madera [mailto:rodrigo.madera@gmail.com]
> Sent: Tuesday, August 24, 2010 8:04 PM
> To: users@felix.apache.org
> Subject: Re: Compendium services implemented by Felix
>
> >
> > I even entertained the thought of writing a book that
> > simply categorizes and briefly introduces the various Apache projects
> to
> > better inform the community where to find what they need...
>
>
> I would buy two copies... instantly.
>
> ;-)
>
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>
>
Re: Compendium services implemented by Felix
Posted by "Richard S. Hall" <he...@ungoverned.org>.
The execution environment specification simply specifies what's
included in the EEs. A JRE may or may not meet these definitions. The
framework only checks to see if a bundle's required EE is met. The
framework doesn't do any verification that the underlying JRE meets the
EE...although, it technically could, I guess, but this is not spec
mandated behavior and I am not aware that any framework impls do this.
-> richard
On 8/25/10 5:43, prakash.achuthan@emc.com wrote:
> Yes, that is when the bundle manifest contains the manifest entry
> "Bundle-RequiredExecutionEnvironment".
>
> If I understood it correctly, OSGi compendium "Execution Environment"
> Specification is just a listing of java packages and methods available
> for a specified execution environment.
>
>
> There is section in Execution Environment spec which has the following
> text:
>
> -------------
> The information is included here for completeness. However, it is likely
> that
> tools will be developed by vendors that validate the compliance of
> Service
> Platforms and bundles in relation to an Execution Environment. For that
> reason, it is possible to download a JAR file containing all the
> signatures as
> Java class files from the OSGi web site, see [2] Downloadable Execution
> Environments.
> -------------
>
>
> Here again I believe the framework will have some way of finding what
> execution environment it running on. When a bundle is installed based on
> the bundle manifest entry " Bundle-RequiredExecutionEnvironment" it will
> check if the bundles is only using methods listed for that execution
> environment (as per module spec, given below).
>
> ------------
> If a bundle includes this header in the manifest then the bundle must
> only
> use methods with signatures that are contained within a proper subset of
> all
> mentioned execution environments. Bundles should list all (known)
> execution
> environments on which it can run the bundle.
> A bundle can only resolve if the framework is running on a VM which
> implements one of the listed required execution environments. Frameworks
> should recognize that the current VM can implement multiple execution
> environments. For example, Java 6 is backward compatible with Java
> 5 and a bundle requiring the Java 6 execution environment must resolve
> on
> a Java 6 VM. The Bundle-RequiredExecutionEnvironment header can not
> hinder a bundle from being successfully installed.
>
> --------------
>
> Framework will have to do this check based on the package/method list
> specified for each execution environment. Is that correct?
> In that case, Can we say that framework will be implementing the logic
> which checks the compliance of service platform& (any installed) bundle
> with the Execution Environment spec?
>
>
> Thanks,
> Prakash
>
>
>
>
> -----Original Message-----
> From: Richard S. Hall [mailto:heavy@ungoverned.org]
> Sent: Tuesday, August 24, 2010 9:49 PM
> To: users@felix.apache.org
> Subject: Re: Compendium services implemented by Felix
>
>
> On 8/24/10 11:50, prakash.achuthan@emc.com wrote:
>> One more question.
>> Does Felix implement Compendium Execution Environment Specification ?
> The Felix framework will verify execution environment requirements of
> bundles.
>
> -> richard
>
>> -----Original Message-----
>> From: prakash.achuthan@emc.com [mailto:prakash.achuthan@emc.com]
>> Sent: Tuesday, August 24, 2010 8:38 PM
>> To: users@felix.apache.org
>> Subject: RE: Compendium services implemented by Felix
>>
>> Thank you all for the replies.
>>
>> This the only link on the web which talks about OSGi service
>> implementation status of various OSGi projects. Looks like it is the
>> updated list.
>> http://en.wikipedia.org/wiki/OSGi_Specification_Implementations
>>
>>
>>
>> -----Original Message-----
>> From: Rodrigo Madera [mailto:rodrigo.madera@gmail.com]
>> Sent: Tuesday, August 24, 2010 8:04 PM
>> To: users@felix.apache.org
>> Subject: Re: Compendium services implemented by Felix
>>
>>> I even entertained the thought of writing a book that
>>> simply categorizes and briefly introduces the various Apache projects
>> to
>>> better inform the community where to find what they need...
>> I would buy two copies... instantly.
>>
>> ;-)
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
>> For additional commands, e-mail: users-help@felix.apache.org
>>
>>
>>
>> ---------------------------------------------------------------------
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>>
> ---------------------------------------------------------------------
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>
>
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RE: Compendium services implemented by Felix
Posted by pr...@emc.com.
Yes, that is when the bundle manifest contains the manifest entry
"Bundle-RequiredExecutionEnvironment".
If I understood it correctly, OSGi compendium "Execution Environment"
Specification is just a listing of java packages and methods available
for a specified execution environment.
There is section in Execution Environment spec which has the following
text:
-------------
The information is included here for completeness. However, it is likely
that
tools will be developed by vendors that validate the compliance of
Service
Platforms and bundles in relation to an Execution Environment. For that
reason, it is possible to download a JAR file containing all the
signatures as
Java class files from the OSGi web site, see [2] Downloadable Execution
Environments.
-------------
Here again I believe the framework will have some way of finding what
execution environment it running on. When a bundle is installed based on
the bundle manifest entry " Bundle-RequiredExecutionEnvironment" it will
check if the bundles is only using methods listed for that execution
environment (as per module spec, given below).
------------
If a bundle includes this header in the manifest then the bundle must
only
use methods with signatures that are contained within a proper subset of
all
mentioned execution environments. Bundles should list all (known)
execution
environments on which it can run the bundle.
A bundle can only resolve if the framework is running on a VM which
implements one of the listed required execution environments. Frameworks
should recognize that the current VM can implement multiple execution
environments. For example, Java 6 is backward compatible with Java
5 and a bundle requiring the Java 6 execution environment must resolve
on
a Java 6 VM. The Bundle-RequiredExecutionEnvironment header can not
hinder a bundle from being successfully installed.
--------------
Framework will have to do this check based on the package/method list
specified for each execution environment. Is that correct?
In that case, Can we say that framework will be implementing the logic
which checks the compliance of service platform & (any installed) bundle
with the Execution Environment spec?
Thanks,
Prakash
-----Original Message-----
From: Richard S. Hall [mailto:heavy@ungoverned.org]
Sent: Tuesday, August 24, 2010 9:49 PM
To: users@felix.apache.org
Subject: Re: Compendium services implemented by Felix
On 8/24/10 11:50, prakash.achuthan@emc.com wrote:
> One more question.
> Does Felix implement Compendium Execution Environment Specification ?
The Felix framework will verify execution environment requirements of
bundles.
-> richard
> -----Original Message-----
> From: prakash.achuthan@emc.com [mailto:prakash.achuthan@emc.com]
> Sent: Tuesday, August 24, 2010 8:38 PM
> To: users@felix.apache.org
> Subject: RE: Compendium services implemented by Felix
>
> Thank you all for the replies.
>
> This the only link on the web which talks about OSGi service
> implementation status of various OSGi projects. Looks like it is the
> updated list.
> http://en.wikipedia.org/wiki/OSGi_Specification_Implementations
>
>
>
> -----Original Message-----
> From: Rodrigo Madera [mailto:rodrigo.madera@gmail.com]
> Sent: Tuesday, August 24, 2010 8:04 PM
> To: users@felix.apache.org
> Subject: Re: Compendium services implemented by Felix
>
>> I even entertained the thought of writing a book that
>> simply categorizes and briefly introduces the various Apache projects
> to
>> better inform the community where to find what they need...
>
> I would buy two copies... instantly.
>
> ;-)
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
> For additional commands, e-mail: users-help@felix.apache.org
>
>
>
> ---------------------------------------------------------------------
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> For additional commands, e-mail: users-help@felix.apache.org
>
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Re: Compendium services implemented by Felix
Posted by "Richard S. Hall" <he...@ungoverned.org>.
On 8/24/10 11:50, prakash.achuthan@emc.com wrote:
> One more question.
> Does Felix implement Compendium Execution Environment Specification ?
The Felix framework will verify execution environment requirements of
bundles.
-> richard
> -----Original Message-----
> From: prakash.achuthan@emc.com [mailto:prakash.achuthan@emc.com]
> Sent: Tuesday, August 24, 2010 8:38 PM
> To: users@felix.apache.org
> Subject: RE: Compendium services implemented by Felix
>
> Thank you all for the replies.
>
> This the only link on the web which talks about OSGi service
> implementation status of various OSGi projects. Looks like it is the
> updated list.
> http://en.wikipedia.org/wiki/OSGi_Specification_Implementations
>
>
>
> -----Original Message-----
> From: Rodrigo Madera [mailto:rodrigo.madera@gmail.com]
> Sent: Tuesday, August 24, 2010 8:04 PM
> To: users@felix.apache.org
> Subject: Re: Compendium services implemented by Felix
>
>> I even entertained the thought of writing a book that
>> simply categorizes and briefly introduces the various Apache projects
> to
>> better inform the community where to find what they need...
>
> I would buy two copies... instantly.
>
> ;-)
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
> For additional commands, e-mail: users-help@felix.apache.org
>
>
>
> ---------------------------------------------------------------------
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> For additional commands, e-mail: users-help@felix.apache.org
>
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RE: Compendium services implemented by Felix
Posted by pr...@emc.com.
One more question.
Does Felix implement Compendium Execution Environment Specification ?
-----Original Message-----
From: prakash.achuthan@emc.com [mailto:prakash.achuthan@emc.com]
Sent: Tuesday, August 24, 2010 8:38 PM
To: users@felix.apache.org
Subject: RE: Compendium services implemented by Felix
Thank you all for the replies.
This the only link on the web which talks about OSGi service
implementation status of various OSGi projects. Looks like it is the
updated list.
http://en.wikipedia.org/wiki/OSGi_Specification_Implementations
-----Original Message-----
From: Rodrigo Madera [mailto:rodrigo.madera@gmail.com]
Sent: Tuesday, August 24, 2010 8:04 PM
To: users@felix.apache.org
Subject: Re: Compendium services implemented by Felix
>
> I even entertained the thought of writing a book that
> simply categorizes and briefly introduces the various Apache projects
to
> better inform the community where to find what they need...
I would buy two copies... instantly.
;-)
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RE: Compendium services implemented by Felix
Posted by pr...@emc.com.
Thank you all for the replies.
This the only link on the web which talks about OSGi service
implementation status of various OSGi projects. Looks like it is the
updated list.
http://en.wikipedia.org/wiki/OSGi_Specification_Implementations
-----Original Message-----
From: Rodrigo Madera [mailto:rodrigo.madera@gmail.com]
Sent: Tuesday, August 24, 2010 8:04 PM
To: users@felix.apache.org
Subject: Re: Compendium services implemented by Felix
>
> I even entertained the thought of writing a book that
> simply categorizes and briefly introduces the various Apache projects
to
> better inform the community where to find what they need...
I would buy two copies... instantly.
;-)
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Re: Compendium services implemented by Felix
Posted by Rodrigo Madera <ro...@gmail.com>.
>
> I even entertained the thought of writing a book that
> simply categorizes and briefly introduces the various Apache projects to
> better inform the community where to find what they need...
I would buy two copies... instantly.
;-)
Re: Compendium services implemented by Felix
Posted by Steven Siebert <sm...@gmail.com>.
Indeed. As Richard said, perhaps an updated table would be more helpful.
I see the same issue of discoverability throughout the Apache projects as
well as outside in other Open Source communities (ie with the PAX folks
(which, btw, you should be able to use their compendium modules in Felix
without a problem)). I even entertained the thought of writing a book that
simply categorizes and briefly introduces the various Apache projects to
better inform the community where to find what they need...perhaps I'll spin
that idea to various leads at ApacheCon(NA) coming up.
Good luck!
Steve
On Tue, Aug 24, 2010 at 9:09 AM, <pr...@emc.com> wrote:
> Thanks Steve.
>
> If I look at the subprojects I don't see much of the OSGi Compendium
> services listed there.
> For e.g., User Admin, Wire Admin, Meta Type service ...etc are listed at
> http://felix.apache.org/site/felix-r4-contributions.html
>
> But I don't see it in the subprojects page
> http://felix.apache.org/site/subprojects.html
>
> Thanks,
> Prakash
>
> -----Original Message-----
> From: Steven Siebert [mailto:smsiebe@gmail.com]
> Sent: Tuesday, August 24, 2010 6:28 PM
> To: users@felix.apache.org
> Subject: Re: Compendium services implemented by Felix
>
> Hi Prakash,
>
> The Felix core does not implement any compendium services (that I know
> of).
> There are several Apache Felix sub projects that do, however. Check
> them
> out here (http://felix.apache.org/site/index.html) under "Apache Felix
> Subprojects".
>
> Cheers,
>
> Steve
>
> On Tue, Aug 24, 2010 at 7:58 AM, <pr...@emc.com> wrote:
>
> > Hi,
> >
> >
> >
> > Is there a wiki/web page which lists out the OSGi compendium services
> > implemented in Apache Felix?
> >
> >
> >
> > Thanks,
> >
> > Prakash
> >
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
> For additional commands, e-mail: users-help@felix.apache.org
>
>
RE: Compendium services implemented by Felix
Posted by pr...@emc.com.
Thanks Steve.
If I look at the subprojects I don't see much of the OSGi Compendium
services listed there.
For e.g., User Admin, Wire Admin, Meta Type service ...etc are listed at
http://felix.apache.org/site/felix-r4-contributions.html
But I don't see it in the subprojects page
http://felix.apache.org/site/subprojects.html
Thanks,
Prakash
-----Original Message-----
From: Steven Siebert [mailto:smsiebe@gmail.com]
Sent: Tuesday, August 24, 2010 6:28 PM
To: users@felix.apache.org
Subject: Re: Compendium services implemented by Felix
Hi Prakash,
The Felix core does not implement any compendium services (that I know
of).
There are several Apache Felix sub projects that do, however. Check
them
out here (http://felix.apache.org/site/index.html) under "Apache Felix
Subprojects".
Cheers,
Steve
On Tue, Aug 24, 2010 at 7:58 AM, <pr...@emc.com> wrote:
> Hi,
>
>
>
> Is there a wiki/web page which lists out the OSGi compendium services
> implemented in Apache Felix?
>
>
>
> Thanks,
>
> Prakash
>
>
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Re: Compendium services implemented by Felix
Posted by Steven Siebert <sm...@gmail.com>.
Hi Prakash,
The Felix core does not implement any compendium services (that I know of).
There are several Apache Felix sub projects that do, however. Check them
out here (http://felix.apache.org/site/index.html) under "Apache Felix
Subprojects".
Cheers,
Steve
On Tue, Aug 24, 2010 at 7:58 AM, <pr...@emc.com> wrote:
> Hi,
>
>
>
> Is there a wiki/web page which lists out the OSGi compendium services
> implemented in Apache Felix?
>
>
>
> Thanks,
>
> Prakash
>
>