 | | | Migrating to Cocoon 2.2... calling servlets from Cocoon: ServletServiceGener | Migrating to Cocoon 2.2... calling servlets from Cocoon: ServletServiceGener 2007-11-22 - By Grzegorz Kossakowski
Back
Josh2007 pisze:
> Hi,
>
> I'm migrating from Cocoon 2.1 to Cocoon 2.2.
> Cocoon 2.2 is deployed as a servlet in Tomcat along with 2 other servlets:
> Axis 2 and eXist xmldb.
>
> It seems with Cocoon 2.2 I can call my 2 other servlets from Cocoon and get
> any xml result they will generate in my sitemap.
Yep, but you can only call servlets that are registered as Spring-beans, using
configuration file
like this[1]:
<bean id="org.apache.cocoon.servletservice.demo1.servlet"
class="org.apache.cocoon.servletservice.demo1.DemoServlet">
<servlet:context mount-path="/test1">
<servlet:init-params>
<entry key="foo" value="baz"/>
</servlet:init-params>
<servlet:connections>
<entry key="demo2" value-ref="org.apache.cocoon.servletservice.demo2
.servlet"/>
</servlet:connections>
</servlet:context>
</bean>
In most cases it's not a big problem to configure servlets that way.
> Can I do that with ServletServiceGenerator? Is there any example? I've been
> searching without success for now.
Actually, ServletServiceGenerator does something more than just fetching data
from other servlets
(it's a job of servlet source). Take a look at this example[2]:
<!-- This is a test of basic servlet services functionality
servletService generator makes a HTTP POST request on servlet:test2:
/basic-service.
Generator posts content of test.xml file and returns to the pipeline
result of service call.
-->
<map:match pattern="test5">
<map:generate type="servletService" src="test.xml">
<map:parameter name="service" value="servlet:test2:/basic-service
?caller=generator"/>
</map:generate>
<map:serialize type="xml"/>
</map:match>
The comment above the match explains what happens quite well. The idea is to
fetch data that is
based on POSTed data. This way servlet:test2:/basic-service can be viewed as
pipeline *fragment*
looking even implementation[2] looks like this:
<!-- This basic service pipeline takes POSTed XML and applays simple
transformation on it -->
<map:match pattern="basic-service">
<map:generate src="service-consumer:"/>
<map:transform src="service-test.xsl">
<map:parameter name="caller" value="{request-param:caller}"/>
</map:transform>
<map:serialize type="xml"/>
</map:match>
> Will my sitemap look like this?
>
> <map:pipeline>
> <map:match pattern="test">
> <map:generate src="anySoapRequest.xml" type="ServletServiceGenerator"/>
> <map:serialize type="xml"/>
> </map:match>
> </map:pipeline>
I would say it would look like this:
<map:pipeline>
<map:match pattern="test">
<map:generate src="servlet:axis:/anySoapRequest" type="file"/>
<map:serialize type="xml"/>
</map:match>
</map:pipeline>
> Thanks for your help,
I suggest to take a closer look at cocoon-servlet-service-sample module that
contains some simple
demos. Of course they are not ideal but at least they present the most
important features of Servlet
Service Framework.
I hope that helps a little.
[1]
http://svn.apache.org/repos/asf/cocoon/trunk/core/cocoon-servlet-service/cocoon
-servlet-service-sample/src/main/resources/META-INF/cocoon/spring/cocoon-servlet
-service-demo1-servletService.xml
[2]
http://svn.apache.org/repos/asf/cocoon/trunk/core/cocoon-servlet-service/cocoon
-servlet-service-sample/src/main/resources/COB-INF/test1/sitemap.xmap
[3]
http://svn.apache.org/repos/asf/cocoon/trunk/core/cocoon-servlet-service/cocoon
-servlet-service-sample/src/main/resources/COB-INF/test2/sitemap.xmap
--
Grzegorz Kossakowski
Committer and PMC Member of Apache Cocoon
http://reflectingonthevicissitudes.wordpress.com/
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ------
To unsubscribe, e-mail: users-unsubscribe@(protected)
For additional commands, e-mail: users-help@(protected)
|
|
|