Hi,
I have prepared these artifacts for upload to Maven Central earlier
this week, but am looking for someone to validate them before I
release them.
See here: http://www.mail-archive.com/dev@felix.apache.org/msg27287.html
and here: http://www.osgi.org/bugzilla/show_bug.cgi?id=153
If someone has a moment to sanity check, please do so and let me know.
Best regards,
David
On 29 October 2012 08:03, Jean-Baptiste Onofré j...@nanthrax.net wrote:
FYI,
the 4.3.1 artifacts have not yet been deployed on Central.
Regards
JB
On 10/29/2012 09:00 AM, Felix Meschberger wrote:
FYI in case you missed it.
In short: The OSGi R 4.3 libraries have been recompiled with Java 5 target
and republished as version 4.3.1 to maven. So to use OSGi R 4.3 libraries in
a Java 5 (and up) environment you should use the 4.3.1 version dependency.
Nothing to be done when using older (4.2.0 and before) dependencies
because they are compiled for Java 1.4.
Regards
Felix
Anfang der weitergeleiteten E-Mail:
Von: BJ Hargrave b...@bjhargrave.commailto:b...@bjhargrave.com
Betreff: [osgi-blog] [OSGi Alliance Blog] 4.3 Companion Code for Java 7
Datum: 26. Oktober 2012 21:06:11 MESZ
An: osgi-b...@mail.osgi.orgmailto:osgi-b...@mail.osgi.org
osgi-b...@mail.osgi.orgmailto:osgi-b...@mail.osgi.org
Antwort an: Private list for OSGi blog discussion
osgi-b...@mail.osgi.orgmailto:osgi-b...@mail.osgi.org
Starting in version 4.3, OSGi started to use generics in some of the API
including the Core specification. Generics were
introducedhttps://en.wikipedia.org/wiki/Generics_in_Java to the Java
language in Java 5. However, OSGi needed to continue to support embedded use
cases which use the CDC/Foundation 1.1 runtime which is still based upon the
Java 1.4 language level and JVM. To address this issue, OSGi compiled the
APIs with -target
jsr14http://www.ibm.com/developerworks/java/library/j-jtp02277/index.html;
an undocumented javac flag introduced before Java 5 was final. So we had the
best of both worlds: we can use generics and still compile to run on Java
1.4 based runtimes.
This worked for Java 5 and Java 6. But when Java 7 shipped, two things
changed: javac no longer understood the jsr14 option to -target and javac
refused to recognize the attributes containing the generics information in
class files already compiled with -target jsr14. The change to no longer
support creating -target jsr14 class files was ok; we could continue to
compile with Java 6 javac. But the change to the javac to cease to recognize
the class file attributes with the generics information in existing class
files was a bigger problem. It meant that the 4.3 API jars published by OSGi
were not useable by people who need to compile with Java 7 javac. By not
useable, I mean javac treated the classes as if they did not contain any
generics information: they were raw. A
bughttp://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7078419 was filed
against Java to see if this was some mistake or oversight. The reply was
that the change was intentional.
At the time this was first
noticedhttps://mail.osgi.org/pipermail/osgi-dev/2011-August/003223.html,
Java 7 was new and not too widely used. OSGi also included the source code
in the jars so you could recompile the code yourself if you needed. Later,
when it came time to ship Core R5, we changed to compile the API classes
with -target 1.5 and so they work fine on Java 7. So problem solved; the new
release's jars don't use -target jsr14! Except some of the current OSGi
implementations (I'm looking at you Felixhttps://felix.apache.org/ and
Karafhttps://karaf.apache.org/) are still based upon Core 4.3 and thus
people using those implementations still need to use the Core 4.3 API. And
if they also want to use Java 7, they need to recompile the OSGi API source.
So after some prodding by a few folks, OSGi rebuilt the Core and Compendium
API jars as Core
4.3.1http://www.osgi.org/Download/File?url=/download/r4v43/osgi.core-4.3.1.jar
and Compendium 4.3.1http://www.osgi.org/Download/F
ile?url=/download/r4v43/osgi.cmpn-4.3.1.jar. The new jars have the same
packages at the same package versions having the same API signatures. They
are just not compiled with -target jsr14 so they work fine with Java 7.
So if you need to use the 4.3 API with Java 7, pick up these new 4.3.1
jars. They should also be available on
mavenhttp://mvnrepository.com/artifact/org.osgi shortly.
--
Posted By BJ Hargrave to OSGi Alliance
Bloghttp://blog.osgi.org/2012/10/43-companion-code-for-java-7.html at
10/26/2012 07:06:00 PM ___
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--
Jean-Baptiste Onofré
jbono...@apache.org
http://blog.nanthrax.net
Talend - http://www.talend.com
