Is it possible to use appengine modules and and cloud endpoints?

Question

Using appengine modules implies creating dynamic web application instead of the usual appengine web application project. Cloud endpoints work well with the usual appengine Web A

Answer 1

Currently working on the same problem, I think I have found a solution with the following setup (using maven for a java project):

In the project-root pom.xml: defines a few common values (like the appengine version you're using), a pom packaging and your modules, especially an EAR one:

4.0.0

com.example
myproject-root
1.0
pom
myproject-root


    1
    1.9.11
    UTF-8



    myproject-ear
    myproject-cloud-endpoints
    myproject-backend

The pom.xml of the EAR module should have of course EAR packaging but also "war" typed dependencies on the other modules and the "unpack types" option of the maven-ear plugin set to "war":

4.0.0


    com.example
    myproject-root
    1.0


com.example
myproject-ear
1.0
ear

myproject-ear


    
        
            org.apache.maven.plugins
            maven-compiler-plugin
            2.5.1
            
                1.7
                1.7
            
        
        
            org.apache.maven.plugins
            maven-ear-plugin
            2.9
            
                5
                lib
                war
                ${project.basedir}/src/main/application/META-INF/maven-application.xml
            
        
        
            com.google.appengine
            appengine-maven-plugin
            ${appengine.target.version}
        
    



    
        com.example
        myproject-cloud-endpoints
        1.0
        war
    
    
        com.example
        myproject-backend
        1.0
        war
    

Finally, the "cloud-endpoints" pom.xml should be configured as a basic cloud endpoints webapp project with "war" packaging:

4.0.0


    com.example
    myproject-root
    1.0


com.example
myproject-cloud-endpoints
1.0
war

myproject-cloud-endpoints


    
    
        com.google.appengine
        appengine-api-1.0-sdk
        ${appengine.target.version}
    
    
        com.google.appengine
        appengine-endpoints
        ${appengine.target.version}
    
    
        javax.servlet
        servlet-api
        2.5
        provided
    
    
        javax.inject
        javax.inject
        1
    




    
    ${project.build.directory}/${project.build.finalName}/WEB-INF/classes
    
        
            org.codehaus.mojo
            versions-maven-plugin
            2.1
            
                
                    compile
                    
                        display-dependency-updates
                        display-plugin-updates
                    
                
            
        
        
            org.apache.maven.plugins
            3.1
            maven-compiler-plugin
            
                1.7
                1.7
            
        
        
            org.apache.maven.plugins
            maven-war-plugin
            2.4
            
                ${project.build.directory}/generated-sources/appengine-endpoints/WEB-INF/web.xml
                
                    
                        
                        ${project.build.directory}/generated-sources/appengine-endpoints
                        
                        
                            WEB-INF/*.discovery
                            WEB-INF/*.api
                        
                    
                
            
        
        
            com.google.appengine
            appengine-maven-plugin
            ${appengine.target.version}
            
                false
                
                
                
                
            
            
                
                    
                        endpoints_get_discovery_doc
                    
                
            
        
    

Building this project, you should be able to generate your cloud-endpoints client librariy through Eclipse: right click on the "cloud-endpoints" project => "Google App Engine WTP" => "Generate Cloud Endpoint Client Library" will generate everything needed in myproject-cloud-endpoints/endpoint-libs/.

Hope that helps!