Simon,
Thanks for your prompt response. I hope the following api will let me
do what I need - compositeContent :
/**
* Creates a new SCA node.
*
* @param compositeURI the URI of the composite to use
* @param compositeContent the XML content of the composite to use
* @param contributions the URI of the contributions that provides
the composites and related artifacts
* @return a new SCA node.
*/
public abstract SCANode2 createSCANode(String compositeURI, String
compositeContent, SCAContribution... contributions);
However I could not find it in the latest 1.2 release... :( sorce code
or binaries...
Any idea? Should I get a nightly?
Regards,
Radu Marian
CRM Services Architecture Team
Bank of America, Charlotte NC
(980) 387-6233
[EMAIL PROTECTED]
-----Original Message-----
From: Simon Laws [mailto:[EMAIL PROTECTED]
Sent: Monday, April 28, 2008 11:54 AM
To: [email protected]
Subject: Re: Is there are simple straightforward way of creating a
Compoisite
On Mon, Apr 28, 2008 at 4:14 PM, Marian, Radu
<[EMAIL PROTECTED]>
wrote:
> Hello,
>
> I have spent quite a few time through ContributionServiceImpl class
> and could not find a simple way to add a Composite to the
> contributiion - given the InputStream of the composite URL. I
> understand tuscany team wants to provide the ease of use for
> compoistes to be discovered from the file system.... However - IMO -
> the api should not prevent one from loading/adding a composite from an
InputStream.
>
> Why is everything have to be served from local file system? Does the
> sca spec mandate that?
>
> Thanks,
> Radu.
>
Hi Radu
You catch us at a point of transition. The spec doesn't mandate that
contributions/composites be read from the local files system although
most of our samples do this as they use the DefaultSCADomain
implementation from the host-embedded module.
There has been work recently on new code to allow for easier and more
consistent processing of contributions and composites and for deployment
of these out to the nodes where they will run. Hence there is a new
runtime interface, see node2-api [1], that can be used to fire up the
Tuscany runtime classes and run a composite.
A node expects to be provided with a single composite and all of the
contributions required to run that composite. This information can be
provided in a number of ways
/**
* Creates a new SCA node.
*
* @param configurationURI the URI of the node configuration
* @return a new SCA node.
*/
public abstract SCANode2 createSCANode(String configurationURI);
/**
* Creates a new SCA node.
*
* @param compositeURI the URI of the composite to use
* @param contributions the URI of the contributions that provides
the composites and related artifacts
* @return a new SCA node.
*/
public abstract SCANode2 createSCANode(String compositeURI,
SCAContribution... contributions);
/**
* Creates a new SCA node.
*
* @param compositeURI the URI of the composite to use
* @param compositeContent the XML content of the composite to use
* @param contributions the URI of the contributions that provides
the composites and related artifacts
* @return a new SCA node.
*/
public abstract SCANode2 createSCANode(String compositeURI, String
compositeContent, SCAContribution... contributions);
If you did want to use this to load contributions from the file system
you can, see [2] for an example (although we don't have the helper
methods in place just yet to make this really easy). Alternatively you
can start a node up and have it read it's configuration across the
network, for example, see one of the nodes from the distributed
calculator sample [3]. There isn't an interface here that takes an input
stream but you can provide a composite as a string which of course can
come from where ever you want it to.
You will note in the distributed calculator sample that there is
"LaunchDomain.java" also. This launches a web app that provides the
environment in which you can manage you contributions and which will
vend them out across the network to nodes using an Atom feed.
There is very little documentation on all of this yet. It's very much on
the TODO list. It's all pretty new and we'd love to hear any comments
you have or ideas for improvement.
Hope that helps
Simon
[1]
http://svn.apache.org/repos/asf/incubator/tuscany/java/sca/modules/node2
-api/src/main/java/org/apache/tuscany/sca/node/SCANode2Factory.java
[2]
http://svn.apache.org/repos/asf/incubator/tuscany/java/sca/itest/validat
ion/src/test/java/calculator/DuplicateComponentNameTestCase.java
[3]
http://svn.apache.org/repos/asf/incubator/tuscany/java/sca/samples/calcu
lator-distributed/src/main/java/node/LaunchCalculatorNodeA.java
