google-app-engine

Google App Engine with Java. Can't start:(

Hello all! I have a problem with GAE. Even simpliest 'helloworld' app doesn't work in Eclipse. Such error appears: java.lang.IllegalStateException: SecurityManagerInstaller must be loaded in the system ClassLoader; was sun.misc.Launcher$ExtClassLoader@35ce36 at com.google.apphosting.utils.security.SecurityManagerInstaller.generatePol...

[appengine] how to transfer a python object between two requests?

i want to process a python dict object in batches between two requests. i was wondering what's the best way to do it. i want to do that because my dict is big and i couldn't do the whole processing in 30s. thanks ...

App Engine - Objectify - Storing a byte[]

I'm using the Objectify library for interfacing with the app engine datastore. In my User class, I store the hashed password as a byte[]. When I put it in the datastore, it is correctly stored as a blob. When I try to load the User object back out I get this error: java.lang.IllegalStateException: Cannot load non-collection value '<B...

Google App Engine - When I want to store a byte array as one of the fields of my entity, do I have to specify it as of type Blob?

Google App Engine - When I want to store a byte array as one of the fields of my entity class, do I have to specify it as of type Blob or ShortBlob instead of byte[]? ...

how can i set the key 'blob-key' about BlobStore?

I tried to use the jquery plugin "uploadify" to upload multiple files to My App in Google App-Engine, and then save them with blobstore, but it failed. I traced the code into get_uploads, it seems field.type_options is empty, and of course does not have 'blob-key'. Where does the key 'blob-key' come from? the code like this: def uploa...

Google app engine or Amazin ec2 for Restful services and direct access to datastore

I'm thinking of building a Restful app on either App engine or ec2 devloped in Java. I'm interested in opinions/experience of using the two options for this. The primary purpose is to create web services to write and retrieve data through a mobile device...basically creating an API for the service I want to create. It seems to me it wou...

Problem with Google App Engine Appstats

I'm having an issue getting Appstats to work correctly. Using /appstats or /appstats/stats ends up in an infinite loop that keeps redirecting back to /appstats/stats. This results in a 404 error saying the page isn't redirecting properly. Any idea what the issue is? Below are the relevant lines in my web.xml. This is basically the same ...

Any other kinds of "Task Queue" APIs ?

I'm curious if it's common practice outside of the GAE platform to be able to defer tasks to background workers via webhooks. I find it particularly useful to speed up the front-end of webapps, by delegating any long process to background tasks. I'd like to hear about open source software allowing to implement a TaskQueue-like API, wit...

output stream on appengine

while using the appengine sdk i can't view the Output of my System.out.println statements how can i view them they are like envaluable debugging tool for me . ...

Why can't I wrap the ServletRequest when trying to capture JSP output

I am trying to dispatch in a servlet request handler to the JSP processor and capture the content of it. I am providing wrapper instances for the ServletRequest and ServletResponse, they implement the corresponding HTTPServletRequest/-Response interfaces, so they should be drop-in replacements. All methods are currently passed to the or...

GAE how to see production exceptions?

Hi, I'm getting an error on the production env but not on the local one. Is there a way to see the exception that is probably being thrown from production? In tomcat - the user will be able the see the exception as the servlet returns its output ...

From actionscript to google's datastore through java.

I'm working on a flash game written in pure actionscript 3.0 in Flex. I've just finished implementing replays for the game, but want to store the top 10 hiscores' replay data on my google-app-engine'd website. I'm using Java for the app-engine stuff in Eclipse in java but I have no idea how to deal with communicating to my java code ...

web2py error while using distinct in the queries

Hi, I am using web2py with GAE. While using some of the queries which has a distinct clause, GAE throws out an error.I have pasted the Traceback. Can someone please help me out with this. In FILE: /base/data/home/apps/panneersoda/1.341206242889687944/applications/init/controllers/default.py Traceback (most recent call last): File...

Secure login on your domain with Google App Engine

Hi, We are starting a very large web based service project. We are trying to decide what hosting environment to use. We would really like to use Google App Engine for scalability reasons and to eliminate the need to deal with servers ourselves. Secure logins/registrations is very important to us, as well as using our own domain. Our ta...

AppEngine dev_appserver.py aborts with no error message

I have an app which works well live on AppEngine. However, when I try to run it locally with the dev_appserver.py, it aborts within ~1 second with: ~/ dev_appserver.py --debug_imports myapp /opt/local/share/google_appengine/google/appengine/api/datastore_file_stub.py:40: DeprecationWarning: the md5 module is deprecated; use hashlib ...

Running Multiple Google App Engine Apps from one Domain

I would like to have the following: myrootsite.appspot.com myrootsite.appspot.com/app1 myrootsite.appspot.com/app2 etc. Is this possible? I know I could just make /app1 be handled by app1, but then the redirects and everything wouldn't work unless I explicitly used redirect('/app1') instead of the current redirect('/'). Is there a wa...

Google App Engine - Blob Store Service with a Dispatcher Servlet

I have a central dispatcher servlet that has a servlet mapping of : <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> When i try to use the blob store service's createUploadUrl("/uploadComplete") it maps to a URL for e.g *'/_ah/upload/agp0d2VldG15cGljchsLEhVfX0Jsb2JVcGx...

Unique Constraint At Data Level in GAE

It seems that the unique constraint is not natively supported in GAE, although one can enforce unique check before putting an object to store. But that was in January 2009, what about now? Can I specify unique constraint on a column during schema creation? i.e. class Account(db.Model): name = db.StringProperty() email = db.String...

Google Chat on GAE?

Is it possible or any plugins to use chat feature for community page on GAE. Something like gmail chat? maybe some Jquery driven chat? ...

Problem with Restlet on GAE

I'm trying to implement a calculator web service on GAE using Java Restlets... it works perfectly fine on localhost but when I upload my project to the Google App Engine everytime I try the web service link it says the link is broken. Here's the code I used: public Restlet createInboundRoot() { Router router = new Router(getContext...