[appengine-java] how to do Reversed Ajax Call crossing user on GAE

We are facing one problem when implementing reversed ajax call crossing users on GAE It is a game center, many client users join the game and play together. We supposed that there is a singleton Game Center instance, and all user is saved in user list within this Game Center instance. Then, if Use

[appengine-java] Singleton class become double instance in GAE

We are meeting one strange thing when we do testing on GAE. The problem is that we implemented a GameCenter class as below. It is a singleton class in system, but we found it always initialize multiple instances based on logs. Please check the source code and info log below. Could you explain why i

[appengine-java] Google Apps Support in GAE

I want to provide Google Apps search and document upload service in my GAE application. Is there any API/Service can support this function in GAE application? -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, s