<br><font size=2 face="sans-serif">Julian,</font>
<br>
<br><font size=2 face="sans-serif"> We are working on implementing
Parallel Sql query execution, for that we need to use java.util.concurrent
package. RetroWeaver has some issues in porting those classes. </font>
<br>
<br><font size=2 face="sans-serif"> There are two options to handle
this,</font>
<br><font size=2 face="sans-serif">1. Don't use java.util.concurrent package
and look for other alternatives such as using the backport util, which
means performance degradation and not using the latest Java api's for new
development.</font>
<br><font size=2 face="sans-serif">2. Finding alternative to port those
classes.</font>
<br>
<br><font size=2 face="sans-serif">So we have gone with the 2nd option.
We have run all the tests using the retrotranslator. We intend to make
everyone to switch to retrotranslator, but we didn't want to force immediately
without running every ones test suite.</font>
<br>
<br><font size=2 face="sans-serif">We have not measured any performance
benefits between them because we don't have any benchmark test scripts.</font>
<br>
<br><font size=2 face="sans-serif">UtilCompatible interfaces: This will
introduce additional work of generifying all the not supported functions
and maintaining two implementation bridges(We might end up with JDK1.5
using java.util.concurrent and 1.4 using backport util). </font>
<br><font size=2 face="sans-serif">If retrotransalator causes any
issue for the existing users then we can consider this option?</font>
<br>
<br>
<br><font size=2 face="sans-serif">Thanks,</font>
<br><font size=2 face="sans-serif">Thiyagu</font>
<br>
<br>
<br>
<br>
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<td width=40%><font size=1 face="sans-serif"><b>"Julian Hyde"
<julianhyde@speakeasy.net></b> </font>
<br><font size=1 face="sans-serif">Sent by: mondrian-bounces@pentaho.org</font>
<p><font size=1 face="sans-serif">05/03/2007 02:24 PM</font>
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<div align=center><font size=1 face="sans-serif">Please respond to<br>
Mondrian developer mailing list <mondrian@pentaho.org></font></div></table>
<br>
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<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">"'Thiyagu Palanisamy'" <thiyagu@gmail.com></font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td><font size=1 face="sans-serif">mondrian@pentaho.org</font>
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<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">[Mondrian] RE: Eigenbase perforce change
9201 for review</font></table>
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<br>
<br><tt><font size=2>Thiyagu,<br>
<br>
Can you elaborate why you need this change? I am loathe to support a new<br>
means of generating jdk14-compatible jar files.<br>
<br>
If you intend to use features which retroweaver cannot handle, then<br>
everyone is going to need to switch to retrotranslator, yes?<br>
<br>
How great is the performance benefit of using these features versus the<br>
features which retroweaver can handle?<br>
<br>
An alternative approach would be to put the incompatible code behind the<br>
UtilCompatible interface. (I did this for EnumSet because retroweaver<br>
does not handle this correctly.) JDK1.4 users would not get the benefit<br>
of these features, but hey, we need to give them some incentive to<br>
upgrade!<br>
<br>
Julian<br>
<br>
> -----Original Message-----<br>
> From: Thiyagu Palanisamy [mailto:thiyagu@gmail.com] <br>
> Sent: Wednesday, May 02, 2007 11:40 PM<br>
> To: Andreas Voss; Bart Pappyn; Julian Hyde; John V. Sichi; <br>
> Matt Campbell; Sam Birney; Zelaine Fong<br>
> Subject: Eigenbase perforce change 9201 for review<br>
> <br>
> http://p4web.eigenbase.org/@md=d&c=6PU@//9201?ac=10<br>
> <br>
> Change 9201 by thiyagu@thiyagu.laptop.dev on 2007/05/02 23:39:06<br>
> <br>
> MONDRIAN:
Added new build target for retro translator. <br>
> Retrotranslator supports more advavnced features of <br>
> java.util.concurrent which is not supported by Retroweaver. <br>
> Parellel Query Execution implementation needs this.<br>
> <br>
> Affected files ...<br>
> <br>
> ... //open/mondrian/build.xml#158 edit<br>
> ... //open/mondrian/lib/backport-util-concurrent-3.0.jar#1 add<br>
> ... //open/mondrian/lib/retrotranslator-runtime-1.2.1.jar#1 add<br>
> ... //open/mondrian/lib/retrotranslator-transformer-1.2.1.jar#1 add<br>
> <br>
> Differences ...<br>
> <br>
> ==== //open/mondrian/build.xml#158 (ktext) ====<br>
> <br>
> 2c2<br>
> < == $Id: //open/mondrian/build.xml#157 $<br>
> ---<br>
> > == $Id: //open/mondrian/build.xml#158 $<br>
> 130a131,132<br>
> > <pathelement <br>
> location="${lib.dir}/retrotranslator-runtime-1.2.1.jar"
/><br>
> > <pathelement <br>
> location="${lib.dir}/backport-util-concurrent-3.0.jar" /><br>
> 756a759,760<br>
> > ${lib.dir}/retrotranslator-runtime-1.2.1.jar,<br>
> > ${lib.dir}/backport-util-concurrent-3.0.jar,<br>
> 793a798,799<br>
> > ${lib.dir}/retrotranslator-runtime-1.2.1.jar,<br>
> > ${lib.dir}/backport-util-concurrent-3.0.jar,<br>
> 1200a1207,1251<br>
> > <!--
> > Just like Retroweaver, Retrotranslator
also <br>
> re-engineers JDK 1.5-compatible code so it can run under<br>
> > JDK 1.4. Retrotranslator supports
backporting of <br>
> more advavnced features of java.util.concurrent.<br>
> > <br>
> > This task compiles all core
and test classes under 1.5<br>
> > then runs retrotranslator to
make them 1.4 compatible.<br>
> > <br>
> > If you only intend to run on
JDK 1.5, there's no <br>
> need to call this task.<br>
> > <br>
> > The inputs to this process
are the mondrian.jar <br>
> file (containing core<br>
> > files) and the testclasses
directory (containing <br>
> test classes).<br>
> > <br>
> > The outputs from this process
are the <br>
> mondrian-jdk14.jar file<br>
> > and the testclasses-jdk14 directory.<br>
> > <br>
> > Note that this task does not
modify classes in place.<br>
> > <br>
> > After you've run this task,
you can invoke 'build <br>
> test' from a JDK 1.4<br>
> > and all the tests will run.
You should also be <br>
> able replace mondrian.jar<br>
> > with mondrian-jdk14.jar and
<br>
> retrotranslator-runtime-1.2.1.jar (retrotranslator's<br>
> > runtime library) in your web
application and run <br>
> jpivot, but I haven't<br>
> > tried that.<br>
> > <br>
> > When you run the regression
under JDK 1.4, you <br>
> must use ant-1.6.0.<br>
> > Later versions of ant include
junit4, which <br>
> requires JDK 1.5.<br>
> > --><br>
> > <target name="retrotranslator" depends="jar,
compile.tests"><br>
> > <taskdef name="retrotranslator"
<br>
> classname="net.sf.retrotranslator.transformer.RetrotranslatorTask"><br>
> > <classpath><br>
> > <pathelement
<br>
> location="${lib.dir}/retrotranslator-transformer-1.2.1.jar"/><br>
> > <pathelement
<br>
> location="${lib.dir}/retrotranslator-runtime-1.2.1.jar"/><br>
> > <pathelement
<br>
> location="${lib.dir}/backport-util-concurrent-3.0.jar"/><br>
> > </classpath><br>
> > </taskdef><br>
> > <delete quiet="true"><br>
> > <fileset dir="."
includes="${jar-jdk14.file}"/><br>
> > <fileset dir="${testclasses-jdk14.dir}"/><br>
> > </delete><br>
> > <mkdir dir="${testclasses-jdk14.dir}"/><br>
> > <retrotranslator destdir="${testclasses-jdk14.dir}"
<br>
> verify="false"><br>
> > <fileset dir="${testclasses.dir}"
<br>
> includes="**/*.class"/><br>
> > </retrotranslator><br>
> > <retrotranslator srcjar="${jar.file}"
<br>
> destjar="${jar-jdk14.file}" verify="false"/><br>
> > </target><br>
> > <br>
> <br>
<br>
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