Is it possible to access or download my code that is running on Google App Engine? For instance, say my hard drive crashes and I have not saved my code on any kind of external repository. Is there any way to recover?
No, it is not possible. You compile your code on your machine and ship up the compiled code.
If you have a source repository, always make sure that you have a backup.
GAE does not have a mechanism for you to download your binaries, so reverse engineering them is not possible except from your own copies.
Of course you could always host your project on GitHub or SourceForge
see also:
how to download google appengine (uploaded)application files
Can I restore my source code that has been uploaded into Google AppEngine?
How do I download the source code of a google app engine project?
Download source code of deployed GAE application
Get source of appengine published version
I can't find it now, but I remember reading a post where they were pretty specific about NOT being able to do that. The gist of it was that they were not a backup service and that you were responsible for backing up your own code.
There is a "datastore backup and restore" feature on the project roadmap though: http://code.google.com/appengine/docs/roadmap.html I've skimmed over a few posts where people talk about ways to backup the database now without that the official sanctioned feature implemented... of course your datastore isn't your code.
Related
I'm wondering if the source code is uploaded or only the binary / compiled version ?
Do GAE engineers have access to my precious source code ?
Yes it uploads the source code and you can also download the source code of a specific version you previously deployed. You can also PERMANENTLY disable such a feature in the admin page.
Don't worry to upload it, besides having strict SLA no one really cares about your code.
The source code appears to be uploaded as well, according to "Downloading source code" in Uploading, Downloading, and Managing a Go App. You could prove it by trying to download the source code yourself.
I've read the GAE docs, and I can't seem to figure out how to download all my entity data.
What I'd love to do is download the whole thing as a big TSV file (or something I can easily munge into one), so I can import my various entities into a spreadsheet and fiddle with them.
But I'm stuck at the starting gate. I don't understand the first few bits of the docs: "This document applies to apps that use the master/slave datastore. If your app uses the High Replication datastore..." -- I'm not even sure which I have, or how I would tell.
Assuming I have the simpler master/slave, the docs continue: "...you can use the Python appcfg.py tool by installing the Java version of the remote_api handler..." but, again, I'm not quite sure what they mean or where I find this appcfg.py tool.
Sorry for such a n00b question, but is there some sort of walk-through? I just want to download my datastore!
Thanks!
Master/Slave is the default (for now), so that's almost certainly what you're using. You can confirm at https://appengine.google.com/ -> app-id -> Administration -> Application Settings -> Datastore Replication Options.
To download your data, first install Remote API for Java, then use appcfg.py to download data:
appcfg.py download_data --application=<app-id> --url=http://<appname>.appspot.com/[remote_api_path] --filename=<data-filename>
There is nothing you need to do other than just follwiong the google's own documentaion. There is no workaround or walkthrough. I am not sure about java. In python , only thing you need to do is enable remote_api in your app.yaml.
appcfg.py can be found inside the root directory of appengine SDK.
I am confused. I thought these were both hosting solutions that Google sells or makes free. What is the difference between the two?
Thanks,
Alex
Google Code is a SourceForge-style hosting solution for open source projects: you can host your code in a supplied Subversion or Mercurial repository and document your project in a wiki. You cannot run code on Google Code, only upload your source code to share with others. It's free.
Google App Engine is a general cloud application host. You can host web sites written in Python or Java, actually running code on Google's servers, with cost proportional to usage (it's free up to some amount).
I accidently deleted my application code from my own machine, however it's running on Google App Engine (GAE), is there a way I could download it from there?
--
app engine actually recently added the ability for the developer who uploaded a given app version to download its source code:
http://code.google.com/appengine/docs/python/tools/uploadinganapp.html#Downloading_Source_Code
You cannot do this unless you have prepared your app ahead of time properly. There is a chance the trick described by Nick in the duplicate question here might work for you. Otherwise, I would suggest using source control like git or svn.
Since ColdFusion is itself Java-based, I would imagine it's not too much of a stretch to suggest that CFML code could be deployed on Google App Engine.
BlueDragon is a commercial solution for deploying CFML code on Java servers.
It's described in this thread how someone got OpenBD (Blue Dragon) running on App Engine:
OpenBD on Google App Engine for Java
Are there any open source alternatives
that could be used for App Engine?
Railo is another obvious candidate here, and some people appear to be trying to tweak it for use on Google App Engine.
I am putting together some demos that run on Open BlueDragon, which in turn is running on Google App Engine. The list is small at the moment, but eventually it should give you a good idea of what is opssible with OpenBD and GAE.
http://www.brighthub.com/hubfolio/matthew-casperson/blog/archive/2010/05/12/cold-fusion-demos.aspx
Check out
http://www.stax.net/ - Stax networks made by a former Allaire(r)?
Works great, supports coldfusion out of the ..cloud. You download a precompiled source file, put your stuff in, upload it and it all works, no fighting with it.
I know google app engine is quite restrictive, it will involve opening up the source and removing everything that attempts to write to the file system, and changing your database interaction.
You can checkout this thread and group as a resource for Open BlueDragon as well as the wiki. Looks like they have a branch already which is working towards GAE compatibility.
On the Railo side of the CFML open source pond you can reference this article from help compiling Railo on your own from the source.
Joining both of their respective google groups and asking questions should yield fruitful as well.
Good Luck!