multiple executions of jaxws-maven-plugin

for executing jaxws-maven-plugin multiple times, it is necessary to add staleFile element to configuration section of the plugin for each execution. this is very useful when there is a need to specify different parameters for wsimport which runs on various wsdls for example.

<executions>
   <execution>
       <id>client</id>
       <phase>generate-sources</phase>
       <goals>
           <goal>wsimport</goal>
       </goals>
       <configuration>
           <verbose>true</verbose>
           <keep>true</keep>
           <extension>true</extension>
           <wsdlDirectory>${wsdl.dir}</wsdlDirectory>
           <wsdlFiles>
               <wsdlFile>client/CRECS.wsdl</wsdlFile>
           </wsdlFiles>
           <packageName>sk.example.client</packageName>
           <wsdlLocation>CRECS.wsdl</wsdlLocation>
           <staleFile>${project.build.directory}/jaxws/stale/client.stale</staleFile>
       </configuration>
   </execution>
   <execution>
       <id>server</id>
       <phase>generate-sources</phase>
       <goals>
           <goal>wsimport</goal>
       </goals>
       <configuration>
           <verbose>true</verbose>
           <keep>true</keep>
           <extension>true</extension>
           <wsdlDirectory>${wsdl.dir}</wsdlDirectory>
           <wsdlFiles>
               <wsdlFile>server/CRESS.wsdl</wsdlFile>
           </wsdlFiles>
           <packageName>sk.example.server</packageName>
           <wsdlLocation>CRESS.wsdl</wsdlLocation>
           <staleFile>${project.build.directory}/jaxws/stale/server.stale</staleFile>
       </configuration>
   </execution>
</executions>