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From "Andreas Veithen (JIRA)" <j...@apache.org>
Subject [jira] Created: (AXIS2-4611) JAX-WS services can no longer be deployed as AAR
Date Sat, 23 Jan 2010 18:26:18 GMT
JAX-WS services can no longer be deployed as AAR
------------------------------------------------

                 Key: AXIS2-4611
                 URL: https://issues.apache.org/jira/browse/AXIS2-4611
             Project: Axis2
          Issue Type: Bug
          Components: jaxws
    Affects Versions: 1.4, 1.4.1, 1.5, 1.5.1
            Reporter: Andreas Veithen


The JAX-WS guide [1] makes the following statement:

[quote]
Axis2 provides two mechanisms for deploying JAX-WS services:
* The service may be packaged and deployed as an AAR, just like any other service within Axis2.
Like with all AARs, a services.xml file containing the relevant metadata is required for the
service to deploy correctly.
* The service may be packaged in a jar file and placed into the servicejars directory. The
JAXWSDeployer will examine all jars within that directory and deploy those classes that have
JAX-WS annotations which identify them as Web services.
[/quote]

This is no longer true. The support for the first scenario has been eliminated by the change
in r646585 [2]. The commit comment explains the reason for this change as follows: "This is
no longer needed now that JAXWS annotated endpoints can be deployed in Axis2." This argument
is flawed because service.xml allows to configure the services in ways that are not supported
by JAXWSDeployer. Here are some examples of valid use cases which could easily be satisfied
if Axis2 supported JAX-WS services deployed as an AAR:

* AXIS2-4045
* http://markmail.org/thread/icicgpq27xh2jtie
* http://markmail.org/thread/oe43iqjzq27k2bnl
* http://markmail.org/thread/3fbbmxs5llimhwzs

Other people have complained about the missing AAR/service.xml support, but without explaining
their use case:

* http://markmail.org/thread/2eadng6lwhgpc4ml
* http://stackoverflow.com/questions/339802/needed-tomcat-axis2-jax-ws-guide-for-dummies

A closer look at r646585 reveals that the AAR support was actually considered experimental
or at least not fit for production use. Therefore, simply rolling back that change is not
an option. Analyzing the code in JAXWSDeployer and JAXWSMessageReceiver, it is also clear
that a JAX-WS service can only work if the AxisService description has been created by org.apache.axis2.jaxws.description.DescriptionFactory.
This is not the case if the service is deployed by ServiceDeployer (which is the component
that deploys AAR files and parses service.xml). Interestingly, ServiceDeployer supports two
approaches to build an AxisService:

1. The AxisService object is entirely built from information in service.xml.
2. The AxisService object is built from a WSDL, and this description is then completed with
the information from the service.xml file.

Maybe JAX-WS services can be supported using an approach similar to item 2, i.e. by letting
DescriptionFactory build the initial AxisService description and then add the information
from the service.xml to that description.

[1] http://ws.apache.org/axis2/1_5_1/jaxws-guide.html
[2] http://svn.apache.org/viewvc?rev=646585&view=rev


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