I'll Check and let you know sorry for the trouble Patrick ----- Original Message ----- From: Andreas Horst To: [email protected] Sent: Wednesday, December 22, 2010 6:41 PM Subject: Re: Modular rpc blues
Alright, now I get it! To bundle RPC functionality in a reusable (.jar) GWT module you only need to declare any RPC servlet in the module's module descriptor. That's all. "gwt:mergewebxml" will create appropriate servlet mappings in the target web.xml. It's really that easy. Make sure the .jar really contains the module descriptor (*.gwt.xml) and that the RPC servlets are actually declared in it. If you try it with a module that used to be an application and only declared its RPC servlets directly in its web.xml you won't be able to use them via "gwt:mergewebxml" AFAIK. Check the contents of the .jar file. Does it contain the module descriptor? Does the module descriptor contain <servlet> tags for the RPCs? 2010/12/22 Metronome / Basic <[email protected]> In fact I simply want to be able to use a jar containing GWT-RPC code in any webapp As I had no succes with my code I tried to rely on "maven-googlewebtoolkit2-sample" that is a HelloWorld RPC example with code in different modules. here is the parent pom I did'nt change the code , I just modified the poms ----- Original Message ----- From: Andreas Horst To: [email protected] Sent: Wednesday, December 22, 2010 1:52 PM Subject: Re: Modular rpc blues I just took a look at your configuration files. Actually I can't tell much from just them especially since I don't have the parent POM. Anyway I'm a bit confused about what you are trying to do. Are you only trying to compile the sample project or are you trying to reuse something of it? What exactly do you mean with "project war rpc and server" or "war server"? A project that packages to a .war file (like GWT applications) or a .war file you are trying to include via module inheritance? I'm sorry but it's really not clear to me. 2010/12/22 Metronome / Basic <[email protected]> Hello Thanks for trying to help me ! One of my tries is : compile the "maven-googlewebtoolkit2-sample" using gwt-maven-plugin it was a three modules project war rpc and server I reduced it to war server , by merging rpc and server I join the pom and web.xml of the war mvn package report ERROR] Failed to execute goal org.codehaus.mojo:gwt-maven-plugin:2.1.0-1:mergewebxml (default) on project maven-googlewebtoolkit2-sample-war: Unable to merge web.xml: NullPointerException -> [Help 1] ----- Original Message ----- From: Andreas Horst To: [email protected] Sent: Wednesday, December 22, 2010 12:26 AM Subject: Re: Modular rpc blues Another question just coming to my mind: Where in the inherited module are you declaring the RPC servlet? If you declare it in the inherited module's web.xml then make sure the Maven GWT plugin parameter "webXml" properly points to it (Not sure how one would do this - never did it myself - especially since inherited modules usually come as a .jar. If so does yours include the web.xml?). If you declare it in the inherited module's module descriptor (a..k.a. *.gwt.xml) all should be fine. Hence I assume you do not declare it there? Look here for details about the module descriptor, note the <servlet> tag. My 2cents: Use the second option. Why? Because obviously your inherited module realizes functionality that is to be reused. It is hence some sort of library and not (only?) an application or even a .war packed web application. All our inherited modules are _library_ modules, they don't get deployed on an _application_ server on their own. Now if one of those features functionality through RPC (we have some of those) we thankfully use the above mentioned <servlet> tag in the module descriptor and let the Maven GWT plugin do its job. IMHO on the one hand a web.xml does not belong into a common not "runnable" module and on the other one a (.war packed) application is not best suitable for inheriting functionality. Regards 2010/12/21 Andreas Horst <[email protected]> 2010/12/21 Thomas Broyer <[email protected]> On Tuesday, December 21, 2010 9:51:38 AM UTC+1, coelho wrote: Hello What seems to me great in GWT is that it's easy to build client code and server code that can communicate through GWT-RPC. What 's great too is that you can write modules and your webapp can use those modules. Then why is it so complicated ( is it possible ? ) to have a module with GWT-RPC code ( implementation and interfaces ) that could be used in a webapp And by "so complicated" you mean adding half a dozen lines to your web.xml file, right? Actually the goal gwt:mergewebxml is really ALL you need (believe me, we use it just like that for exactly what you are trying to). Please clarify what you mean with "web.xml refers to external module". I assume either your web.xml gets or already is troubled or your POM is not configured properly. I tried many things in eclipse I tried many things with maven ( gwt-maven-plugin : goal mergewebxml ) fails when web.xml refers to external module still no success ! Have a look at the cargo maven plugin (I haven't tried it though) I wondered if there is such a project already done Is there somewhere a jar , ready made , with GWT-RPC included that I could use as a reference ? or is hopeless ? I believe that's what web-fragments in Servlets 3.0 are meant to solve: http://java.sun.com/developer/technicalArticles/JavaEE/JavaEE6Overview_Part2.html#webfrags -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. 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