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From "Ove Gram Nipen (JIRA)" <j...@codehaus.org>
Subject [jira] Created: (MNG-4770) WSDL dependencies should not be transitive
Date Wed, 18 Aug 2010 08:07:32 GMT
WSDL dependencies should not be transitive
------------------------------------------

                 Key: MNG-4770
                 URL: http://jira.codehaus.org/browse/MNG-4770
             Project: Maven 2 & 3
          Issue Type: Bug
          Components: Dependencies
    Affects Versions: 2.2.x (to be reviewed)
            Reporter: Ove Gram Nipen


Some web service frameworks, such as CXF, lets you deploy wsdl artifacts in the maven repository.
When another project (the client) depends on a wsdl artifact, the client should not receive
the dependencies of the web service project transitively, since the web service is isolated.


It is not possible to work around the problem by declaring the dependencies of the web service
project as optional, since this leads to missing jar files in the web service's {{WEB-INF/lib}}.


More specifically: 

Say you have a service called {{HelloService}}, defined in its own pom: 

{code}
<project>
	<groupId>com.example</groupId>
	<artifactId>HelloService</artifactId>
	<version>1.0</version>
	<packaging>war</packaging>

	<dependencies>
		<dependency>
			<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>2.5.6</version>
		</dependency>
	...

</project>
{code}

{{HelloService}} uses the {{cxf-java2ws-plugin}}, which generates a wsdl file and installs
it in the maven repository during {{mvn install}}. 

You then have a client project called {{HelloConsumer}}, defined in its own pom: 

{code}
<project>
	<groupId>org.something</groupId>
	<artifactId>HelloConsumer</artifactId>
	<packaging>war</packaging>

	<dependencies>
		<dependency>
			<groupId>com.example</groupId>
			<artifactId>HelloService</artifactId>
			<version>1.0</version>
			<type>wsdl</type>
		</dependency>

	...
</project>
{code}

{{HelloConsumer}} would then use the {{maven-dependency-plugin}} together with the {{cxf-codegen-plugin}}
to copy the wsdl locally and generate the necessary web service stubs. 

If you then do {{mvn dependency:tree}} on {{HelloConsumer}}, you would expect to see only
{{HelloService}}, not spring, because {{HelloService}} and {{HelloConsumer}} are isolated
from each other by the web service transport layer, most often http. *However, maven currently
includes spring transitively*, which is wrong.

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