Create google wave robot from grails

1. use grails 1.1.1 (1.2.M3 does not work yet!!!)
2. create a grail project gswordwave
grails create-app gswordwave
3. uninstall hiberante
grails uninstall-plugin hibernate

4. install app engine plugin, selected jdo ( default)
grails install-plugin app-engine
5. run the app with this command:
grails app-engine
6. kill it
7. do initial deployment and make sure it works without wave stuff

• Register your application on appengine site. gswordwave
• grails set-version 1
• grails app-engine package
• %APP-ENGINE-HOME%/bin/appcfg.cmd update ./target/war

8. download the google wave client jars from

• http://code.google.com/p/wave-robot-java-client/downloads/list and copy all the wave client jar to the lib directory in the grails root dir, also download servlet.api.2.5.jar into lib
• mkdir src/java/parroty/server
• copy http://code.google.com/apis/wave/extensions/robots/java-tutorial.html src/parroty/ParrotyServlet.java into the above directory src/java/parroty/server and name it ParrotyServlet.java and update the package to parroty.server.
• Make a web-app/_wave dir. Create in it a capabilties.xml file and copy paste the code

<?xml version="1.0" encoding="utf-8"?>

<w:robot w="http://wave.google.com/extensions/robots/1.0">
<w:capabilities>
<w:capability name="WAVELET_PARTICIPANTS_CHANGED" content="true">
</w:capability>
<w:version>1</w:version>
</w:capabilities>
</w:robot></pre>

9. In your appengine-web.xml (mine is in
c:\users\yiguang\.grails\1.1.1\projects\gswordbible\stage)file
you will find your application id is there already(mine, "gswordwave").


<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
<application>gswordwave</application>
<version>0.1</version>
<sessions-enabled>true</sessions-enabled>
<ssl-enabled>true</ssl-enabled>
<system-properties>

</system-properties>

</appengine-web-app>


10. add your ParrotyServlet config into src\templates\war\web.xml :

<servlet>
<servlet-name>Parroty</servlet-name>
<servlet-class>parroty.server.ParrotyServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Parroty</servlet-name>
<url-pattern>/_wave/robot/jsonrpc</url-pattern>
</servlet-mapping>


11. do redeployment

• grails app-engine package
• %APP-ENGINE-HOME%/bin/appcfg.cmd update ./target/war

12. check it out

http://gswordwave.appspot.com/_wave/capabilities.xml
13. goto your wave account and add gswordwave@appsport.com onto
your contact list and start to communicate with it