[appengine-java] Google App Engine Java Cookbook Sceencast
I'm demoing Google App Engine at DevNexus 2011 on March 21st as part of David Chandler's (turbomanage.wordpress.com) GAE presentation. If you can't come see the demo, you can view the fast-paced screencast from this link: http://goo.gl/UT2W3 It contains a cookbook for building a complete environment from scratch that contains the latest Java Developers Kit, Eclipse IDE, Google App Engine (GAE) plugin, GAE SDK, and a real working Java application (memwords) running locally and on a production Google App Engine server at appspot.com. If you don't like the presentation, I hope you'll appreciate the music. Ronald Jenkees (www.DisorganizedFun.com) was kind enough to give me permission. Your comments and feedback are appreciated. mike lawrence -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: periodic downtimes
the app engine team recently fixed a problem I was having in about 12 hrs. I couldn't add a new application, GAE forgot I had already authenticated my mobile phone number. as for your ap, I'll be interested to see if an ap with expected high contention will work well on gae. seems like gea is optimized for high-reads and few non-contending writes (like a blog). . On Feb 11, 1:37 am, bcottam bcot...@gmail.com wrote: Good point Robert, I'm not sure if it's just the datastore. My users wind up getting a 500 error on requests that just read data, usually even if the datastore has issues, you can still read from it. I'd be comfortable using memcache, but I'd want to ensure it had the same data integrity as the datastore (or something close anyhow). The nice thing about the datastore is that there is optimistic locking, so I know when there's contention. Currently, our users collectively modify data at about the same time (like 7-12 updates in a single second from several users), it's pretty important that I keep them in order, so I currently have my writes wrapped in a datastore transaction with a loop that runs about 5 times or until the transaction succeeds. Has anyone managed that type of contention in the memcache? If so, I'd love to hear some techniques that can ensure no update tramples a previous concurrent update. I've submitted inquiries to the billing and CPU request form, but haven't heard back. Does it usually take longer than 24 hours to hear back from the app-engine support team? Thanks -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] What was your Slim3 Datastore API experience like?
Does anyone have experience to share with using just the datastore API from Slim3 (not the web framework) http://sites.google.com/site/slim3appengine/slim3-datastore/installation I've narrowed down my data store API choice to Objectify or Slim3. I'm leaning toward Slim3 for its global transaction support. (I'm sure I'll eventually need global transactions, eg there is no way to know when in the future if I'll need a transaction between two root entities.) Concerned about - Polluting my datamodel with Slim3 Annotations - Having to run the Annotation pre-processor as part of the IDE (will that work with maven-command line?) - Global transaction performance. The Slim3 site shows much faster times than I'm seeing http://sites.google.com/site/slim3appengine/ Local about 2x slower Entity Groups Local Transaction(millis) Global Transaction(millis) 5 447 781 http://slim3demo.appspot.com/gtx/ vs 3.5x slower 5 107 365 - What happens when a global transaction fails? Can it be detected when it occurs so the user can be notified? - Is it using undocumented Google APIs? - Support/Docs/Examples - digging through the source code to solve a problem is not much fun -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Lightweight Best performing MVC framework - Recommendation
I've got http://www.stripesframework.org/ cold starting in under 2 secs with http sessions enabled On Dec 29, 9:08 am, Sree sreeju...@gmail.com wrote: Hello, I am new to Java and App Engine, and coming from ASP.NET C# and Windows Azure world. I am looking for a lightweight best performing java based MVC framework. I would like to migrate my ASP.NET MVC project to App Engine (Java). It would be great if you can share your experience. I am open to Python as well, but learning Java is faster than Python, since I am good at C#. Thanks in Advance. Regards Sree -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
