RE: How to use external jars in Merlin components?

> -----Original Message-----
> From: Harvinder Singh [mailto:[email protected]]
> Sent: 20 August 2004 23:03
> To: Avalon framework users
> Subject: RE: How to use external jars in Merlin components?
> 
> Stephen,
> 
> I am able to build the component but now it is giving me runtime
error.

Ok - build issue are out of the way 
... now onto the runtime. 

> I removed the jar file (abc-1.0.0.jar) from {Merlin.home}\system
folder
> and
> placed it under {user.dir}/.maven/repository/abc/jars and it worked.
> Actually whatever dependency I declare in project.xml I should have
those
> jars in the maven repository which I did not have it.
> By mistake I had overlooked that.
> Following the build, maven is installing the jar file (Test-1.1.jar)
into
> D:\Merlin\tutorials\Test\target folder.

This depends on the maven target that you issue.  For example, issuing
the command 'maven jar:install' will result in the build of the jar file
and the the creation of a copy in the maven repository.

> Now when I execute and run Test-1.1.jar, I am not able to instantiate
any
> class from the external jar (abc-1.0.0.jar) which I decalred as a
> dependency
> (NoClassDefFoundError)

There are two points to cover here - firstly, the addition of a
reference to the abc jar in your block definition, and secondly,
synchronization of the merlin and maven repositories (see below).

> You had mentioned below that Merlin looks for resources at runtime in
> {merlin.repository}.
> My {merlin.repository} property is set to  is
> {user.dir}/.avalon/repository
> and this only has the avalon-framework folder having its jar.
> Also now in kernel.xml should I have an entry for the abc-1.0.0.jar
any
> longer?

I suggest you remove the cache reference in the kernel and instead
create a merlin.properties file in you ${user.home} directory and add a
property definition to declare the merlin repository to be the same as
the maven repository.

For example:

merlin.repository = C:\maven\repository

That will tell merlin to use the directory C:\maven\repository as its
application repository cache so when you update resources via maven,
merlin will automatically pick them up.

Cheers, Steve.


> 
> Harvinder
> 
> -----Original Message-----
> From: Stephen McConnell [mailto:[email protected]]
> Sent: Friday, August 20, 2004 3:05 PM
> To: 'Avalon framework users'; [email protected]
> Subject: RE: How to use external jars in Merlin components?
> 
> 
> 
> 
> > -----Original Message-----
> > From: Harvinder Singh [mailto:[email protected]]
> > Sent: 20 August 2004 21:54
> > To: Avalon framework users
> > Subject: RE: How to use external jars in Merlin components?
> >
> > Here is the dependency declaration
> >   <dependencies>
> >     <dependency>
> >       <groupId>avalon-framework</groupId>
> >       <artifactId>avalon-framework-api</artifactId>
> >       <version>4.2.0</version>
> >     </dependency>
> >     <dependency>
> > 	  <groupId>abc</groupId>
> > 	  <artifactId>abc</artifactId>
> > 	  <version>1.0.0</version>
> > 	  <type>jar</type>
> >     </dependency>
> >   </dependencies>
> >
> > The first dependency is resolved as it takes from the avalon
> repository
> > but the second one gives the problem.
> > I am having the jar file as
> {Merlin.home}\system\abc\jars\abc-1.0.0.jar.
> > Now for this I am having an entry in kernel.xml as follows:
> 
> *spit, snarl, spit, spit*
> 
> Within the Merlin system there are two repositories - one repository
is
> the Merlin internal system repository ${merlin.home}/system which is
> intended for exclusive use by the Merlin application.  The second
> repository (commonly referred to as the application repository) is
made
> available for application jar files such as your abc-1.0.0-jar - this
is
> located under ${merlin.repository).
> 
> Now - two things:
> 
>   (a) your existing setup should work assuming you have your
>       maven and merlin system repository in sync.
>   (b) but I'm going to suggest that you do something different
> 
> Before going further, what is the directory into which maven is
> installing your jar file following a build?
> 
> Stephen.
> 
> 
> > <repository>
> >   	<cache>D:\Merlin\system\abc\jars</cache>
> >    	<hosts>
> > 	<host path="http://www.dpml.net/"/>
> >       <host path="http://www.ibiblio.org/maven/"/>
> >      	</hosts>
> > </repository>
> 
> 
> 
> 
> 
> 
> > Harvinder
> >
> > -----Original Message-----
> > From: Stephen McConnell [mailto:[email protected]]
> > Sent: Friday, August 20, 2004 2:38 PM
> > To: 'Avalon framework users'; [email protected]
> > Subject: RE: How to use external jars in Merlin components?
> >
> >
> >
> >
> > Can you post the dependency declaration from your maven project.xml
> > file?
> >
> > Steve.
> >
> >
> >
> > > -----Original Message-----
> > > From: Harvinder Singh [mailto:[email protected]]
> > > Sent: 20 August 2004 21:19
> > > To: Avalon framework users
> > > Subject: RE: How to use external jars in Merlin components?
> > >
> > > Stephen,
> > >
> > > Thanks a lot for the info !!!
> > > Actually I had specified my dependent jar file in the project.xml
> and
> > the
> > > error occured
> > > while resolving build time dependencies itself.(hadn't reached
> > runtime)
> > > Another doubt which I have is that whether Maven also looks for
the
> > files
> > > whose names are of the type
> > > <name>-<version>.<type>.
> > > My jar file did not follow the particular naming standard so I
> changed
> > it
> > > to
> > > the above standard, but still the error persists.
> > > And regarding the repository, I had specified the particular cache
> > folder
> > > where my jar file is kept (in the cache directive in kernel.xml)
> > > But still it does not seem to pick the file up.
> > > Any thoughts ?
> > >
> > > Regards,
> > > Harvinder
> > >
> > > -----Original Message-----
> > > From: Stephen McConnell [mailto:[email protected]]
> > > Sent: Friday, August 20, 2004 12:09 PM
> > > To: 'Avalon framework users'; [email protected]
> > > Subject: RE: How to use external jars in Merlin components?
> > >
> > >
> > >
> > > Harvinder:
> > >
> > > Both maven and merlin use a repository of jar resources.  In you
> case
> > > you have both build and runtime dependencies to take of.  Build
time
> > > dependencies are declared in a project.xml and are managed by
maven.
> > I'm
> > > guessing that you have that one sorted out.  Once maven has
produced
> > the
> > > build artifact (a.k.a jar file) you need to include this in the
> > > repository used by the merlin runtime.
> > >
> > > If you you execute the following command you will see a bunch of
> > > properties listed that provide information about your runtime
> > > environment:
> > >
> > >  $ merlin -info
> > >
> > > The listing should include the value of 'merlin.repository'.  This
> > value
> > > is the directory that corresponds to the root of the repository
> cache
> > > directory within which merlin is looking for resources at runtime.
> > > Merlin (and maven) look for resources based on the following
> pattern:
> > >
> > >   [cache]/[group]/[type]s/[name]-[version].[type]
> > >
> > >
> > > If merlin does not locate the jar file in the repository it will
> look
> > > for the jar in the remote repositories associated with your
> > > configuration (see merlin.hosts value).  If the jar file cannot be
> > > located at any of the remote repositories you will get the error
you
> > > have mentioned below.  If the resource is not available on a
remote
> > > repository you either add it to your local cache, or, setup your
own
> > > local repository (accessible using file or http protocol) and
> include
> > > this in the set of remote repositories declared under the
> > 'merlin.hosts'
> > > property.
> > >
> > > Cheers, Steve.
> > >
> > >
> > > > -----Original Message-----
> > > > From: Harvinder Singh [mailto:[email protected]]
> > > > Sent: 20 August 2004 18:46
> > > > To: Avalon framework users
> > > > Subject: How to use external jars in Merlin components?
> > > >
> > > > All,
> > > >
> > > > I am able to build and run the tutorials in Merlin using Maven.
> > > > I even built a small component of my own and tested it.  It
works
> > > fine.
> > > > But now when I try to include some external jar files(on my
local
> > > machine)
> > > > for that component, the build fails.
> > > > After some googling I found out that I need to have an entry for
> the
> > > > external jar file in
> > > > the project.xml file used by Maven.
> > > > Also the path for that external jar file should be mentioned in
> > > kernel.xml
> > > > under repository directive.
> > > > I did all that but the build fails and gives the following error
:
> > > >
> > > > Attempting to download <jar file name>.
> > > > WARNING: Failed to download <jar file name>.
> > > > The build cannot continue because of the following unsatisfied
> > > dependency:
> > > > <jar file name>
> > > >
> > > > Can some one please help me out on this issue ? Has someone
faced
> > the
> > > > similar kind os issue?
> > > > Please revert back soon.
> > > >
> > > > Regards,
> > > > Harvinder
> > > >
> > > >
> > > >
> >
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