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From Eddie Bernard <ebern...@digitalthink.com>
Subject RE: Adding/extending a manifest using <ejbjar>
Date Tue, 15 Jan 2002 18:48:50 GMT
After many hours of research and scouring over the java specs, here's what I
found out ... just thought I'd post this so others don't lose sleep over
this ;).

If you specify your own manifest file, you *must* provide the
"Manifest-Version" name/value pair, otherwise it will generate an "empty"
(actually <cr><lf><cr><lf>) manifest.

This is a restriction noted in the java specification for creating a
manifest.

Moreover (and on a separate note), a manifest line *cannot* exceed 72 bytes
per specification.

This means that if you're adding a "Class-Path: " attribute (which consumes
12 of the 72 bytes allocated leaving you with only 60), you can only add 60
characters or bytes worth of additional classpath information such as jars,
zips, classes, etc.  In my case, I have over 120 bytes of information I
wanted to add to this attribute but now I'm unable to do so due to this
restriction.

I don't understand why this is a restriction considering the need for J2EE
components to define its own classpath requirements.  Nonetheless, it's
something to consider.

What I'm going to have to do is add my additional third party components to
the system classpath of the J2EE server (in this case WebLogic) and limit
the manifest classpath construct to only the components that I'm
building/generating (i.e. only one jar file).

Thanks to everyone for their help on this.  If anyone has something else to
lend to this, please do so -- it will be of great value to everyone
concerned :).

Cheers!
Eddie

-----Original Message-----
From: Todd Chambery [mailto:tchambery@hotmail.com]
Sent: Saturday, January 12, 2002 7:35 AM
To: Ant Users List
Subject: Re: Adding/extending a manifest using <ejbjar>

----- Original Message -----
From: "Eddie Bernard" <ebernard@digitalthink.com>
To: "'Ant Users List'" <ant-user@jakarta.apache.org>
Sent: Friday, January 11, 2002 5:30 PM
Subject: RE: Adding/extending a manifest using <ejbjar>

> Todd-
>
> Thanks again!  I did manage to find the file in CVS and I've downloaded
it.
> However, I'm still getting an empty manifest when I use it.
>
> I inferred from looking at the code that the "manifest" attribute is not
> required as it will pick it up automagically from the location you've
> specified.  Is this a correct assumption?  IF I add the "manifest"
> attribute, I get an empty manifest.  If I leave it out, I get the default
> manifest.

The manifest attribute has to be an absolute path to a single manifest file:
<ejbjar
manifest    ="d:\foo\bar\MANIFEST.MF"
...

This manifest will be used for each of the ejbjars in the descriptors
directory.  In my case, each ejbjar had its own manifest, so obviously this
didn't work.  The CVS GDT adds this:

protected void writeJar(..) {
...
File manifestFile = new File(getConfig().descriptorDir,
baseName + "-manifest.mf")

which looks in the root of the descriptor directory for a manifest with a
filename prepended with the jar name of its associated descriptor.

descriptor_root/
basejarname-manifest.mf
basejarname_1-manifest.mf
basejarname_2-manifest.mf

basejarname_bean/
META-INF/
basejarname-ejb-jar.xml   <- (you don't have to use this
naming convention)
basejarname_1_bean/
META-INF/
basejarname_1-ejb-jar.xml
basejarname_2_bean/
META-INF/
basejarname_2-ejb-jar.xml

Todd

>
> Nonetheless, it looks like if this does work it will accomplish what I
need.
>
> Any thoughts on how I can get this to work?
>
>
> Cheers!
> Eddie
>
>
> -----Original Message-----
> From: Todd Chambery [mailto:tchambery@hotmail.com]
> Sent: Friday, January 11, 2002 6:25 AM
> To: Ant Users List
> Subject: Re: Adding/extending a manifest using <ejbjar>
>
>
> Eddie,
>
> The most current version of the GDT in CVS looks in the descriptor root
> directory for the renamed manifest. So,
>
>     descriptor_root/
>         basejarname-manifest.mf
>         basjarname_bean/
>             META-INF/
>                 ejb-jar.xml
>
> This depends kind of on what's specified in the 'naming' attribute of the
> <ejbjar> task, but you get the idea.  Case is important
> (assuming you're not on a win box).
>
> I don't think this is very intuitive, so I submitted a patch (actually 2,
> but the first one sucked) that makes the GDT look in the
> current descriptor dir (in the above example,
> descriptor_root/basejarname_bean/META-INF/) for "manifest.mf".  I don't
know
> how the
> Ant people will respond, but I can mail it to you if you want.
>
> Todd
>
>
>
>
> ----- Original Message -----
> From: "Eddie Bernard" <ebernard@digitalthink.com>
> To: "'Ant Users List'" <ant-user@jakarta.apache.org>
> Sent: Friday, January 11, 2002 3:05 AM
> Subject: RE: Adding/extending a manifest using <ejbjar>
>
>
> > Todd-
> >
> > So, if are you saying that the manifest file name must have the name of
> the
> > EJB as specified in the deployment descriptor?
> >
> > If so, then does the name of the manifest and directory structure look
> like:
> >
> > META-INF/
> >    ejb-jar.xml
> >    MyBeanName-manifest.mf
> >
> > or does the manifest simply need to be "Manifest.mf".  Better yet, is
this
> > case-sensitive?
> >
> >
> >
> > Cheers!
> > Eddie
> >
> > -----Original Message-----
> > From: Todd Chambery [mailto:tchambery@hotmail.com]
> > Sent: Wednesday, January 09, 2002 5:41 PM
> > To: Ant Users List
> > Subject: Re: Adding/extending a manifest using <ejbjar>
> >
> >
> > Howdy,
> >
> > The GenericDeploymentTool in CVS
> >
>
(http://cvs.apache.org/viewcvs/jakarta-ant/src/main/org/apache/tools/ant/tas
> > kdefs/optional/ejb/GenericDeploymentTool.java) has a workaround in which
> > <ejbjar> will pick up your manifest if it is named with
> >
> >     descriptor_root_dir/base_name-manifest.mf
> >
> > .
> >
> > I don't quite understand why GDT doesn't just look to see if a
> "manifest.mf"
> > exists in the current descriptor directory, and if it does, add it to
the
> > jar.  If one isn't there, put in the empty Ant default.  I'm going to
make
> > an attempt at submitting a patch (I think it's a very simple fix).
> >
> > hope that helps,
> >
> > Todd
> >
> >
> >
> > ----- Original Message -----
> > From: "Eddie Bernard" <ebernard@digitalthink.com>
> > To: <ant-user@jakarta.apache.org>
> > Sent: Wednesday, January 09, 2002 7:54 PM
> > Subject: Adding/extending a manifest using <ejbjar>
> >
> >
> > > OK, I've haven't completely given up on using <ejbjar> for my WebLogic
> 6.1
> > > project.
> > >
> > > The reason I want to use it is that I have approximately 75 EJBs that
I
> > want
> > > to build and the target I've created that uses <ejbjar> neatly creates
> > each
> > > EJB with only one target.   Using some of the other suggested methods
> > > (which, again, I appreciate the responses) would require me to have a
> > target
> > > for virutally every bean and even worst add more targets if more beans
> are
> > > added to the project.
> > >
> > > Now with all tht said, I'm in the process of creating an Enterprise
> > Archive,
> > > but I'm having a deployment problem -- again unrelated to Ant itself.
> > > However, after reading some BEA white papers and the J2EE
specifications
> > for
> > > Application Deployment, it allows the addition of the name:value pair:
> > >
> > > Class-Path: list-of-jars-separated-by-spaces
> > >
> > > Example:
> > >
> > > Class-Path: lib/my_support_classes.jar
> > >
> > > Now the Ant-related problem... It seems that <ejbjar> extends the
<jar>
> > > meaning that it inherits the "manifest" attribute.  If I use <jar>
with
> my
> > > manifest addition it works just fine.  However, with <ejbjar> it
> generates
> > a
> > > "near empty" file (actually, it has a set of cr/lf).
> > >
> > > Has anybody else come across this problem or have any ideas what I can
> do?
> > >
> > >
> > >
> > > --
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