Re: [osgi-dev] OSGi and Java 9

Fri, 08 Sep 2017 05:42:44 -0700

Part of the issue is that JPMS design was a moving target. Until Java 9 ships, the design was changing. So OSGi had no final design to consider. Once Java 9 is shipped and JPMS design is final, then OSGi experts can consider what, if anything, needs to be specified by OSGi. I cannot promise what will be decided nor when.
 
Since the OSGi experts fully expected OSGi to run unchanged on top of the Java 9 runtime, like the vast majority of existing Java applications, there was no worry that OSGi would be rendered inoperative by Java 9.
--

BJ Hargrave
Senior Technical Staff Member, IBM // office: +1 386 848 1781
OSGi Fellow and CTO of the OSGi Alliance // mobile: +1 386 848 3788
hargr...@us.ibm.com
 
 
----- Original message -----
From: Alex Sviridov <ooo_satu...@mail.ru>
Sent by: osgi-dev-boun...@mail.osgi.org
To: osgi-dev <osgi-dev@mail.osgi.org>
Cc:
Subject: Re: [osgi-dev] OSGi and Java 9
Date: Fri, Sep 8, 2017 8:23 AM
 
Thank you very much for your answer. This is very useful information.

You say that "there is no answer for that at this time". Can you say approximately
when official OSGi answer will appear?

To tell the truth the situation seems to be strange for me. I will explain why. It was
known years ago that Java 9 would support modules using Jigsaw. When I learned
about it of course I was not glad but I thought that OSGi experts of course would
think and work for compatibility. Because as I understand there is Java Community
Process and I was sure that OSGi experts will be the most active persons there.

However, Java 9 is almost here but there is no answer. I've read many articles
but all they say that suggested solutions can not be considered for production.
And the question is why there is no solution. I see only two reasons - either
OSGi experts didn't take necessary measures or their requirements were ignored.

I am saying all this not to blame someone! I am saying all this trying to understand
the situation and the future/perspective of OSGi platform (all our products are on OSGi).
Could anyone give information about the situation?

Best regards, Alex
 
Четверг, 7 сентября 2017, 23:31 +03:00 от "BJ Hargrave" <hargr...@us.ibm.com>:
 
I am sorry I could not help you more. I don't have a detailed checklist of things to do.
 
What I am saying is that JPMS and OSGi can operate at different layers. They do not need to interact. Java 9 runtime classes are loaded by JPMS modules and then an existing application can run on top of that using -classpath just like on Java 8. An OSGi-based application can also run there. Think of it like JPMS runs the -bootclasspath while OSGi runs on the -classpath above the -bootclasspath.
 
So both technologies can exist in the same VM this way. JPMS and OSGi don't have to be friends in this situation. They just need to not interfere with each other :-)
 
If you are asking about how you can install JPMS modules in an OSGi framework just like bundles, then there is no answer for that at this time that I am aware of.
--

BJ Hargrave
Senior Technical Staff Member, IBM // office: +1 386 848 1781
OSGi Fellow and CTO of the OSGi Alliance // mobile: +1 386 848 3788
hargr...@us.ibm.com
 
 
----- Original message -----
From: Alex Sviridov <ooo_satu...@mail.ru>
Sent by: osgi-dev-boun...@mail.osgi.org
To: osgi-dev <osgi-dev@mail.osgi.org>
Cc:
Subject: Re: [osgi-dev] OSGi and Java 9
Date: Thu, Sep 7, 2017 4:05 PM
 

Thank you very much for your answer. However, it is absolutely not what I asked.
I didn't ask about warnings. I asked about principles how to work with both technologies
at the same time. This is the main reason I started this thread in this mailing list.

I am not OSGi expert/developer. I am OSGi user. I wrote to this mailing list to get
clear technical solutions how to make JPMS and OSGi friends. I tell the truth -
advices "set some options to ignore some messages" is not what I am looking for.

Best regards, Alex

 
Четверг, 7 сентября 2017, 22:25 +03:00 от "BJ Hargrave" <hargr...@us.ibm.com>:
 
You may need to set some options to ignore some warnings. But your OSGi based application should run fine just like other existing apps (assuming you don't use Java internals which Java 9 hides).
--

BJ Hargrave
Senior Technical Staff Member, IBM // office: +1 386 848 1781
OSGi Fellow and CTO of the OSGi Alliance // mobile: +1 386 848 3788
hargr...@us.ibm.com
 
 
----- Original message -----
From: Alex Sviridov <ooo_satu...@mail.ru>
Sent by: osgi-dev-boun...@mail.osgi.org
To: osgi-dev <osgi-dev@mail.osgi.org>
Cc:
Subject: Re: [osgi-dev] OSGi and Java 9
Date: Thu, Sep 7, 2017 1:26 PM
 
Thank you very much for your answer. It is good news. Could you give any information
HOW to use OSGi on Java 9? Should I totally ignore JPMS (use any switches to
permit/disable etc) or should I delegate JPMS some tasks (which?) and delegate
OSGI other tasks (which?)?

Best regards, Alex

 
Четверг, 7 сентября 2017, 20:01 +03:00 от "BJ Hargrave" <hargr...@us.ibm.com>:
 
You can use OSGi on Java 9. Just like any other Java program. While the Java runtime class libraries are modularized with the Java Platform Module System (JPMS), your application running on the Java runtime can remain modularized by OSGi. OSGi is not going to stop working on Java 9 :-) In other words, -classpath applications will not stop working on Java 9.
 
Now, there may be some blips and bugs in code that will need to be addressed for Java 9, that can happen with each new major Java release.
--

BJ Hargrave
Senior Technical Staff Member, IBM // office: +1 386 848 1781
OSGi Fellow and CTO of the OSGi Alliance // mobile: +1 386 848 3788
hargr...@us.ibm.com
 
 
----- Original message -----
From: Alex Sviridov <ooo_satu...@mail.ru>
Sent by: osgi-dev-boun...@mail.osgi.org
To: osgi-dev@mail.osgi.org
Cc:
Subject: [osgi-dev] OSGi and Java 9
Date: Thu, Sep 7, 2017 12:22 PM
 
Hello, everyone

Java 9 is about to be released. The main problem is Java 9 modular system because it seems
to be strange to support two modular systems in one product - I mean Java 9 modular system
and OSGi.

What should OSGI users do now with current their products on OSGI? Not to use Java 9 and
all future Java versions? Or there are other solutions how to work with OSGI on Java 9?

I have found some articles in internet but I would like to hear answer from OSGi
developers and OSGi experts. I would be thankful for any information.

Best regards, Alex
 


--
Alex Sviridov
 


--
Alex Sviridov
 


--
Alex Sviridov
 

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