Re: Why does Block.lookup throws Exception?

Stephen McConnell Thu, 13 Nov 2003 14:27:05 -0800

Eric Pugh wrote:

That would be great, because I assume that Merlin will hollar if there is a
config error etc, I basically catch teh Exception and throw a
NestableRuntimeException.

Yep - asssumption is correct.

Next question..

How do I get the darn mimetype component to load..


<container name="fulcrum">
  <classloader>
    <classpath>
      <repository>
        <resource id="fulcrum:fulcrum-mimetype-api" version="1.0-alpha-4"/>
        <resource id="fulcrum:fulcrum-mimetype-impl"
version="1.0-alpha-4"/>
      </repository>
    </classpath>
  </classloader>
  <component name="mimetype"
class="org.apache.fulcrum.mimetype.DefaultMimeTypeService"/>

</container>

Notice I bumped the versions, you need to build locally and deploy..   When
I do a lookup, I do this:
(MimeTypeService)merlin.lookup("fulcrum/mimetype")

Don't have the code in front of me just at the moment but you should be using "/fulcrum/mimetype" (i.e. an absolute path). Remember that your invoking this from the root container - unlike the testcase where you can conviniently use a relative reference to the test container.

I also tried
(MimeTypeService)merlin.lookup("mimetype")
Part of me feels like though that the block info included in the impl jar should mean I don't need to declare this..

You don't need to do this. If the <component> is declared Merlin will default to activating component on container deployment.

Not sure though..  Right now I
just get back a null..

That's not good. You should actually be getting an IlegalArgumentException.

I can commit the code if that helps..

Yep - what's the directory path that your committing to?

Stephen.

Eric

-----Original Message-----
From: Stephen McConnell [mailto:[EMAIL PROTECTED]
Sent: Thursday, November 13, 2003 9:46 PM
To: Avalon Developers List
Subject: Re: Why does Block.lookup throws Exception?

Eric Pugh wrote:

Hi all,

I am working on integrating the Merlinized Fulcrum Mimetype

component, and

noticed that this throws an exception:

Block root = m_kernel.getRootBlock();
      return root.locate(path);

Why doesn't it throw a MerlinException or ComponentException?  Or
RuntimeException?  It seems like just Exception isn't very useful...

I agree.

There is a NoProviderDefinitionException declared in the
activation API.
I think this will cover the majority of concerns.  I'll do
some playing
around and see what we can come up with.

Stephen.

Eric


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Re: Why does Block.lookup throws Exception?

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