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From "Bruno P. Kinoshita" <brunodepau...@yahoo.com.br>
Subject Re: [Math] How to select a specific JDK ?
Date Wed, 13 Jun 2012 15:43:17 GMT
I agree with James, Jenkins is a great choice for such tasks.

That's what I do when I want to test a project with a different JVM, but have no time to set
up Jenkins jobs.

$ export JAVA_HOME=/opt/java/ibm...
$ mvn clean test install

Just my 0.02 cents :-)

Cheers


Bruno P. Kinoshita
http://kinoshita.eti.br
http://tupilabs.com


----- Original Message -----
> From: James Carman <james@carmanconsulting.com>
> To: Commons Developers List <dev@commons.apache.org>
> Cc: 
> Sent: Wednesday, 13 June 2012 11:53 AM
> Subject: Re: [Math] How to select a specific JDK ?
> 
> You'd be better off using something like Jenkins for this.  You could
> set up different jobs to run your builds under different conditions
> (windoze vs. linux, jdk7 vs. jdk6, etc.)
> 
> 
> On Wed, Jun 13, 2012 at 10:47 AM, Gilles Sadowski
> <gilles@harfang.homelinux.org> wrote:
>>  On Wed, Jun 13, 2012 at 03:05:13PM +0200, Xavier Detant wrote:
>>>  The byte code generated by the compiler is totally independent from the 
> JVM
>>>  that will be used to run it.
>> 
>>  Totally independent? Compiling with 1.7 and running with 1.6 will raise 
> this
>>  error:
>>   Unsupported major.minor version 51.0
>> 
>>>  So I think the point is not «How to compile
>>>  using the right JDK?» but «How to run with using the right JVM?» Am I
>>>  wrong?
>> 
>>  It is both: compiling _and_ running the tests.
>> 
>>  I should be able to do all combinations, i.e.:
>>   1. Compile with javac 1.6 and run with java 1.6
>>   2. Compile with javac 1.7 and run with java 1.7
>>   3. Compile with javac 1.6 and run with java 1.7
>>  (and similarly with s/6/5/)
>> 
>>>  If so, this can't be done at compile time, so it can't be done 
> via
>>>  maven, unless you use antrun maven's plugin to create a ant task to 
> launch
>>>  your program.
>> 
>>  The point is to compile and then _run_ the unit tests, assuming that the
>>  code conforms to the syntax of Java 5, Java 6, and Java 7, respectively.
>> 
>>  In particular, if some source code is Java 5, it should be compatible with
>>  more recent versions of the Java language, thus be compilable with more
>>  recent implementations of javac.
>>  The ultimate goal is to check that the unit tests pass independently of the
>>  javac and java versions.
>> 
>> 
>>  Best regards,
>>  Gilles
>> 
>>> 
>>>  2012/6/13 Gilles Sadowski <gilles@harfang.homelinux.org>
>>> 
>>>  > Hello.
>>>  >
>>>  > >
>>>  > > With maven, you can configure the compiler to compile in the 
> version you
>>>  > > want.
>>>  > >
>>>  > > Add this to the pom.xml and set the arguments as you which.
>>>  > >
>>>  > > <build>
>>>  > >         <pluginManagement>
>>>  > >                 <plugin>
>>>  > >                     
> <groupId>org.apache.maven.plugins</groupId>
>>>  > >                     
> <artifactId>maven-compiler-plugin</artifactId>
>>>  > >                     <version>2.4</version>
>>>  > >                     <configuration>
>>>  > >                         
> <encoding>UTF-8</encoding>
>>>  > >                         <source>1.6</source>
>>>  > >                         <target>1.6</target>
>>>  > >                         <compilerArguments>
>>>  > >                             <Xlint:-unchecked />
>>>  > >                         </compilerArguments>
>>>  > >                     </configuration>
>>>  > >                 </plugin>
>>>  > >
>>>  > > See http://maven.apache.org/plugins/maven-compiler-plugin/
> for more
>>>  > > informations.
>>>  >
>>>  > I had seen that, but that cannot be the whole story (unless there 
> is some
>>>  > maven magic involved); indeed, how can maven differentiate
>>>  >  java-6-openjdk-amd64
>>>  > from
>>>  >  java-6-sun
>>>  > (since both are Java 1.6)?
>>>  >
>>>  > I was thinking that there should be some environment variable(s) 
> whose
>>>  > setting would somehow activate the above configuration.
>>>  >
>>>  >
>>>  > Regards,
>>>  > Gilles
>>>  >
>>>  > >
>>>  > >
>>>  > > 2012/6/13 Gilles Sadowski 
> <gilles@harfang.homelinux.org>
>>>  > >
>>>  > > > On Wed, Jun 13, 2012 at 12:48:31PM +0200, Jochen 
> Wiedmann wrote:
>>>  > > > > Yes, that switch is called PATH (environment 
> variable).
>>>  > > >
>>>  > > > Do you mean that I should change the PATH variable just 
> to build
>>>  > Commons
>>>  > > > Math?
>>>  > > > I surely hope that there is a more flexible way.
>>>  > > >
>>>  > > > With "ant", all that's needed is to define 
> JAVA_HOME (another
>>>  > environment
>>>  > > > variable, but specific to the task at hand).
>>>  > > >
>>>  > > > > On Wed, Jun 13, 2012 at 12:19 PM, Gilles Sadowski
>>>  > > > > <gilles@harfang.homelinux.org> wrote:
>>>  > > > > > Hello.
>>>  > > > > >
>>>  > > > > > Are there command-line switches that will 
> select a specific JDK?
>>>  > > > > > I.e. I have several of them installed:
>>>  > > > > >
>>>  > > > > > $ ls -l /usr/lib/jvm
>>>  > > > > > total 36
>>>  > > > > > lrwxrwxrwx  1 root root   24 Dec 17 11:04 
> default-java ->
>>>  > > > java-1.6.0-openjdk-amd64
>>>  > > > > > lrwxrwxrwx  1 root root   18 Jan  5 18:27 
> java-1.5.0-gcj ->
>>>  > > > java-1.5.0-gcj-4.6
>>>  > > > > > drwxr-xr-x  6 root root 4096 Jan 18 15:04 
> java-1.5.0-gcj-4.4
>>>  > > > > > drwxr-xr-x  6 root root 4096 Mar  7 17:33 
> java-1.5.0-gcj-4.6
>>>  > > > > > lrwxrwxrwx  1 root root   23 Aug 11  2010 
> java-1.5.0-sun ->
>>>  > > > java-1.5.0-sun-1.5.0.22
>>>  > > > > > drwxr-xr-x 10 root root 4096 Aug 11  2010 
> java-1.5.0-sun-1.5.0.22
>>>  > > > > > lrwxrwxrwx  1 root root   20 Dec 16 18:51 
> java-1.6.0-openjdk-amd64
>>>  > ->
>>>  > > > java-6-openjdk-amd64
>>>  > > > > > lrwxrwxrwx  1 root root   20 May  3 14:00 
> java-1.7.0-openjdk-amd64
>>>  > ->
>>>  > > > java-7-openjdk-amd64
>>>  > > > > > drwxr-xr-x  3 root root 4096 Jan 18 15:38 
> java-6-openjdk
>>>  > > > > > drwxr-xr-x  7 root root 4096 Mar  7 17:29 
> java-6-openjdk-amd64
>>>  > > > > > drwxr-xr-x  3 root root 4096 Jan 18 15:38 
> java-6-openjdk-common
>>>  > > > > > lrwxrwxrwx  1 root root   19 Jun  9  2011 
> java-6-sun ->
>>>  > > > java-6-sun-1.6.0.26
>>>  > > > > > drwxr-xr-x  8 root root 4096 Jan 18 15:47 
> java-6-sun-1.6.0.26
>>>  > > > > > drwxr-xr-x  7 root root 4096 Jun  5 17:12 
> java-7-openjdk-amd64
>>>  > > > > > drwxr-xr-x  3 root root 4096 Jun  5 17:12 
> java-7-openjdk-common
>>>  > > > > > lrwxrwxrwx  1 root root   12 Jan  5 18:27 
> java-gcj -> java-gcj-4.6
>>>  > > > > > lrwxrwxrwx  1 root root   18 Apr 29  2010 
> java-gcj-4.4 ->
>>>  > > > java-1.5.0-gcj-4.4
>>>  > > > > > lrwxrwxrwx  1 root root   18 Nov 14  2011 
> java-gcj-4.6 ->
>>>  > > > java-1.5.0-gcj-4.6
>>>  > > > > >
>>>  > > > > > and I'd like to be able to say something 
> like
>>>  > > > > >  -D...=/usr/lib/jvm/java-7-openjdk-amd64
>>>  > > > > > so that maven will use the corresponding 
> compiler and JVM.
>>>  > > > > >
>>>  > > > > > Does the default configuration already cares 
> for this? If so, which
>>>  > > > are the
>>>  > > > > > command-lins options?
>>>  > > > > >
>>>  > > > > > If not, I guess that this should be defined in 
> a "profile" in
>>>  > > > > > "settings.xml". If so, could someone 
> post such a profile?
>>>  > > > > >
>>>  > > > > >
>>>  > > > > > Thanks,
>>>  > > > > > Gilles
>>>  > > > > >
>>>  > > >
>>>  > > > 
> ---------------------------------------------------------------------
>>>  > > > To unsubscribe, e-mail: 
> dev-unsubscribe@commons.apache.org
>>>  > > > For additional commands, e-mail: 
> dev-help@commons.apache.org
>>>  > > >
>>>  > > >
>>>  > >
>>>  > >
>>>  > > --
>>>  > > Xavier DETANT
>>>  >
>>>  > 
> ---------------------------------------------------------------------
>>>  > To unsubscribe, e-mail: dev-unsubscribe@commons.apache.org
>>>  > For additional commands, e-mail: dev-help@commons.apache.org
>>>  >
>>>  >
>>> 
>>> 
>>>  --
>>>  Xavier DETANT
>> 
>>  ---------------------------------------------------------------------
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>> 
> 
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