如何连接到本地Google Cloud数据存储数据库？

Question

I've GAE application which creates some data in the Google Cloud Datastore and stores some binary files into the Google Cloud Storage - let's call the application WebApp . Now I have a different application running on the Google compute engine. Let's call the application ComputeApp .

The ComputeApp is a backend process which is processing data created by the WebApp . I asked here in this question previously which API can I use to communicate with Datastore from the ComputeApp . As suggested by @proppy, I implemented the Datastore communication using of the Google Cloud Datastore API .

Everything works fine as far as I'm communicating with the Datastore in the Google cloud. I'm using the service account authentication.

Now I need to run my ComputeApp locally, on my development PC so I'll take data created by my local WebApp and stored into the local debug Datastore. I need it because I want to have a testing environment so I can debug may GAE app locally.

How should I modify my ComputeApp code to force it to connect to my local debug Datastore instead of connect to the Google cloud?

I googled a lot and didn't find any advice nor example. Only possible way I found that I should rewrite my code completely and use a different API to do that. Such is Datastore Remote API. Is this really only way? Should I really rewrite whole ComputeApp to connect to the local DB? Really?

I hope that I just overlooked something important and It's not true...

Answer 1

Google Cloud Datastore has a local development server that you can use: https://developers.google.com/datastore/docs/tools/devserver

You can create and start the local datastore using the gcd tool which is linked to in the doc above.

If you use DatastoreHelper.getDatastoreFromEnv(); to build your Datastore, you can tell it to connect to your local database by exporting the env variable DATASTORE_HOST :

export DATASTORE_HOST=http://localhost:8080