Exposing Apache Streams interface with Juneau Remoteable

Background: Apache Streams contains java interfaces which emulate social network REST APIs and implementations (some using Juneau Rest Proxy) for call method on those APIs via java.

Objective: Expose those interfaces / implementations via a hosted REST API, supporting an HTML serialization option, allowing a user to discover what methods are available, activate them, and view the results directly in the browser.

Some Relevant classes:

• https://github.com/apache/streams/blob/master/streams-contrib/streams-provider-twitter/src/main/java/org/apache/streams/twitter/api/Account.java
  • Defines interface for getting account details of the authenticated token.
• https://github.com/apache/streams/blob/master/streams-contrib/streams-provider-twitter/src/main/java/org/apache/streams/twitter/api/Twitter.java
  • Includes implementation of Account via Rest Proxy to api.twitter.com
• https://github.com/apache/incubator-juneau/blob/master/juneau-rest/src/main/java/org/apache/juneau/rest/remoteable/RemoteableServlet.java
  • Server side of juneau remoting
• https://github.com/apache/incubator-juneau/blob/master/juneau-rest-client/src/main/java/org/apache/juneau/rest/client/RestClient.java
  • Client side of juneau remoting

Proof of concept code : 

https://gist.github.com/steveblackmon/928396d08b0bde3dfbd601ad3d2200a5

Proof of concept interaction :

• http://localhost:8000/twitter

  • Probot > Twitter
    • org.apache.streams.twitter.api.Geo
    • org.apache.streams.twitter.api.Friends
    • org.apache.streams.twitter.api.Account
    • org.apache.streams.twitter.api.Users
    • org.apache.streams.twitter.api.Statuses
    • org.apache.streams.twitter.api.Favorites
    • org.apache.streams.twitter.api.AccountActivity
    • org.apache.streams.twitter.api.Twitter
    • org.apache.streams.twitter.api.WelcomeMessageRules
    • org.apache.streams.twitter.api.Media
    • org.apache.streams.twitter.api.WelcomeMessages
     

     

  • http://localhost:8000/twitter/org.apache.streams.twitter.api.Account

    • Probot > Twitter
      • settings
      • verifyCredentials

  • http://localhost:8000/twitter/org.apache.streams.twitter.api.Account?invokeMethod=settings

    • Probot > Twitter
      org.apache.juneau.rest.RestException: Error occurred trying to invoke method: settings

• Proof of concept : Diagnosis

Failure seem to occur in PojoIntrospector.java

Line 131

Method m = p.getBeanContext().createSession().getClassMeta(o.getClass()).getPublicMethods().get(method);

m = null

because o.getClass() = java.util.LinkedHashMap$LinkedKeySet

where-as it seems that it should be org.apache.streams.twitter.api.Account.class

In fact 

p.getBeanContext().createSession().getClassMeta(org.apache.streams.twitter.api.Account.class).getPublicMethods().get(method);

finds 'settings' as expected.