Webservice-Client: Common approach with Spring WS, JAXB and just one WSDL file?

[patb]

Hello,

I would like to use Spring WS to build a Webservice-Client with JAXB for marshalling and unmarshalling the Java classes.

But what I have is just one WSDL file. When I understand it right, I can generate Java classes with JAXB (xbj.exe), which then can be used by me with Spring WS to retrieve the Webservice-Data and send an answer.

But JAXB can only generate Java classes from xsd-schema files. Must I now manually copy those xsd-definitions from within the WSDL file to generate those classes via JAXB? (in my case the WSDL file contains 4 XSD definitions).

Or is there a way to just convert the whole WSDL to Java classes which I can use with Spring WS (I know there is the "wsimport", but it is part of JAX-WS and I think I can't use it in this scenario, right?).

So what is the common approach with Spring WS / JAXB / one WSDL file?

I really would like to get startet with Spring WS and JAXB - thanks a lot for your help!

[ptalakanti]

look here http://blog.dawouds.com/2008/09/mave...sing-jaxb.html

[patb]

Hello ptalakanti,

thanks for your answer. Your link describes the maven task like the following webpage: http://jaxb.java.net/jaxb-maven2-plugin/

The difference is, that the official JAXB-page also uses .xsd files directly, not the WSDL. The example in your link uses quite the same approach with the small difference, that for "xjc.exe" the parameter "-wsdl" will be used. But when I start "xjc.exe" manually and display the help, the "-wsdl" parameter reads:

"treat input as WSDL and compile schemas inside it (experimental,unsupported)".

So I thought this could not be the common way to do it.

[ptalakanti]

I am not sure why the example was not working but I ended up creating a maven build file to generate java objects from wsdl

I could not download the plugin, It turns out it is not available on maven central so I added this repository to pom.xml

<pluginRepositories>
  	<pluginRepository>
  	  <id>maven2-repository.java.net</id>
	  <name>Java.net Repository for Maven</name>
	  <url>http://download.java.net/maven/2</url>
	  <layout>default</layout>
  	</pluginRepository>
  </pluginRepositories>

I have to say the documentation is not really good for this plugin, I stumbled around a bit before I got this working. I used the following maven plugin config to generate the java objects from wsdl input

<plugin>
<groupId>com.sun.tools.xjc.maven2</groupId>
<artifactId>maven-jaxb-plugin</artifactId>
<version>1.1.1</version>
 <configuration>
	<generateDirectory>src/main/java</generateDirectory>
	<generatePackage>prasanna.generated</generatePackage>
	<schemaDirectory>src/main/resources</schemaDirectory>
 </configuration>
	<executions>
	  <execution>
		<phase>compile</phase>
		<goals>
	        	<goal>generate</goal>
		</goals>
		<configuration>
		<schemaDirectory>src/main/resources</schemaDirectory>
		<readOnly>true</readOnly>
		<includeSchemas>
		<includeSchema>hello.wsdl</includeSchema>
		</includeSchemas>
		<args>-wsdl</args>
		</configuration>		
	</execution>
	</executions>
 </plugin>

looks like you did the same thing, I don't know why you got that error. I tried to attach my pom.xml to the post but I keep getting invalid file error

[GSP]

Hi,

I am looking for a similar way of developing a webservice-Client, can you please suggest me a good site , where i can start with.Since i do not know much about JAXB.

[patb]

Hello GSP,

when starting with Spring WS, I think the official reference documentation is a good start point. It is not as heavy as the Spring core documentation, so I think, especially when focusing the development of a Webservice client, you will get started quickly.

As for JAXB, when you only want to generate classes out of a XML Schema file (.xsd), you just use the command line tool "xjc.exe", found in your JDK bin-directory, it is really easy. For a webservice client, this is what you only need. Of course, JAXB is more than that, and if you want to learn to annotate your own classes with JAXB, I suggest consulting JAXB's official documentation, also. But for a Webservice client, you only need JAXB generate your files and then have a look at the Marshalling mechanism in the Spring WS documentation.

[GSP]

Thank you so much for your help.I will try Spring WS and let you know.

[johnpaulmathew]

This very helpful to me too ptalakanti...

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Education Consultants in India

[pilerou]

I use WSDL generation using this maven artefact.

Here are some problems i already met with other technologies (no Spring ws) remote webservices :
- SOAP Action is required by some remote webservices ==> you have to add it in soap header using a callback
- the wsdl only declares complexType and no element ==> you have to add the complexType object in a JAXBElement with the good QName
- the wsdl uses the same root tag for all functions (for example : parameters) and functions all returns the same root tag ==> you have to use a JAXBElement with the good QName for the request / You have to use a specific source extractor

In order to call remote services using their wsdl, i shared an interceptor that allows all those functions : https://itcb.svn.sourceforge.net/svn...terceptor.java
In my java code, i just have to code a JAVA interface that matches the remote wsdl with generated classes as parameters and return types. The interceptor does his work in order to call webservice.

Hope it helps.

[skram]

Check the following tutorials. You might find something interesting:

http://krams915.blogspot.com/p/tutorials.html

http://krams915.blogspot.com/2010/12...ing-3-mvc.html
http://krams915.blogspot.com/2010/12...ng-client.html