Handlers declaration

[hani Ibrahim]

Dear all,
im preparing to take SCDJWS exam .i have been studying in RMH book in chapter 14 im losted. Is the Message Handlers declared in web.xml or in webservices.xml?
please Help

[Amit K Srivastava]

Hi Hani,

Handler declaration goes in webservices.xml. Also, you can have a chain of handlers declared in your Web service DD file. If you like to have a Handler class [it should extend jax-rpc handler class] defined in your webservice which you may be using for processing SOAP message header information.
The mention of that handler class goes in webservices.xml. For Axis style webservice the same is placed in server-deploy.wsdd file. Now, how this is specified is something which is specific to target App Server.

Here I will provide a few samples:
1. Websphere:
<handler id="Handler_1066493401322">
<handler-name>serverHandler</handler-name>
<handler-class>websphere.handler.ServerHandler</handler-class>
<soap-header>
<namespaceURI>http://x.y.z</namespaceURI>;
<localpart>xfh</localpart>
</soap-header>
<soap-header>
<namespaceURI>http://x.y.z</namespaceURI>;
<localpart>lang</localpart>
</soap-header>
</handler>

2. Weblogic
<handler-chains>
<handler-chain name="myChain">
<handler class-name="weblogic.handler.ServerHandler" />
</handler-chain>
</handler-chains>

3. Oracle AS
<handler>
<handler-name>serverHandler</handler-name>
<handler-class>oc4j.handler.ServerHandler</handler-class>
<soap-header xmlns:wsa1="http://x.y.z">;test</soap-header>
</handler>

Hope this help.

Thanks,
Amit Srivastava..

[hani Ibrahim]

Dear Amit,
i want to thank you for this quick response about my Question.
but lets make 100% clear answer. I understand from you that if i has handelrXX so i will make it declared in webservices.xml but what about the other case that i delcare it in web.xml ?
thanks a lot

[Amit K Srivastava]

You don't need to specify handler information in web.xml. Your webservice will learn from webservices.xml only [not from any other place] that a Server Handler has been configured. It will use that server handler class (or chain of handlers) to process the SOAP header information.

-Amit

[hani Ibrahim]

Thanks a lot Amit..it is now clear to me

[ruijin yang]

Hi,

Server-side handler has to be declared using <port-component> element in webservices.xml , client-side handler has to be declared using <service-ref> element in web.xml or ejb-jar.xml.

[hani Ibrahim]

Dear ruijin yang ,

Would you please explain that in more details and is that appear in web services specification or in Vendor specification like Websphere ?

[ruijin yang]

Originally posted by hani Ibrahim:
Dear ruijin yang ,

Would you please explain that in more details and is that appear in web services specification or in Vendor specification like Websphere ?

Please read this chapter from XYZWS:
http://www.xyzws.com/scdjws.do?cat=scdjws&smenu=SGS34&article=7

<service-ref> in web.xml:
<service-ref>
<description>WSDL Service AttachmentIBMService</description>
<service-ref-name>service/AttachmentIBMService</service-ref-name>
<service-interface>ibm.attachment.AttachmentIBMService</service-interface>
<wsdl-file>WEB-INF/wsdl/AttachmentIBM.wsdl</wsdl-file>
<jaxrpc-mapping-file>WEB-INF/AttachmentIBM_mapping.xml</jaxrpc-mapping-file>
<service-qname xmlns fx="urn:attachment.ibm">pfx:AttachmentIBMService</service-qname>
<port-component-ref>
<service-endpoint-interface>ibm.attachment.AttachmentIBM</service-endpoint-interface>
</port-component-ref>
<handler>
<handler-name>ibm.attachment.handler.AttachmentIBMClientHandler</handler-name>
<handler-class>ibm.attachment.handler.AttachmentIBMClientHandler</handler-class>
</handler>
</service-ref>

<port-component> in webservices.xml:
<port-component>
<port-component-name>AttachmentIBM</port-component-name>
<wsdl-port xmlns fx="urn:attachment.ibm">
pfx:AttachmentIBM
</wsdl-port>
<service-endpoint-interface>
ibm.attachment.AttachmentIBM
</service-endpoint-interface>
<service-impl-bean>
<servlet-link>
ibm_attachment_AttachmentIBMBindingImpl
</servlet-link>
</service-impl-bean>
<handler>
<handler-name>ibm.attachment.handler.AttachmentIBMHandler</handler-name>
<handler-class>ibm.attachment.handler.AttachmentIBMHandler</handler-class>
</handler>
</port-component>
[ May 24, 2007: Message edited by: ruijin yang ]

[Amit K Srivastava]

Hi Ruijin,

Client handler is something which Webservice client should take care of [Client handler may be enriching soap requests emanating from WS Client with the header information which is supposed to be proccessed by the Webservice's Server handler].
It makes sense for client application's web.xml to capture these information you have mentioned.

Could you please share the idea behind this as i am not so sure why webservice should declare this?

Thanks,
Amit Srivastava..

[ruijin yang]

Originally posted by Amit K Srivastava:
Hi Ruijin,

Client handler is something which Webservice client should take care of [Client handler may be enriching soap requests emanating from WS Client with the header information which is supposed to be proccessed by the Webservice's Server handler].
It makes sense for client application's web.xml to capture these information you have mentioned.

Could you please share the idea behind this as i am not so sure why webservice should declare this?

Thanks,
Amit Srivastava..

Hi Amit,

Sorry, I have not idea about your question. I am learning web services and preparing for this exam. Hope someone can answer your question.