datastore-sample

Datastore Sample Application with Native Image

This application uses the Google Cloud Datastore client library and is compatible with Native Image compilation.

This sample runs through some basic operations of creating/deleting entities, running queries, and running transaction code.

Setup Instructions

1. Follow the GCP Project and Native Image Setup Instructions.

2. If you wish to run the application against the Datastore emulator, ensure that you have the Google Cloud SDK installed.

   In a new terminal window, start the emulator via gcloud:

   gcloud beta emulators datastore start --host-port=localhost:9010
   

   Leave the emulator running in this terminal for now. In the next section, we will run the sample application against the Datastore emulator instance.

Run with Native Image Compilation

1. Navigate to this directory and compile the application with the Native Image compiler.

   mvn package -P native
   

2. (Optional) If you're using the emulator, export the DATASTORE_EMULATOR_HOST as an environment variable in your terminal.

   export DATASTORE_EMULATOR_HOST=localhost:9010
   

   The Datastore Client Libraries will detect this environment variable and automatically connect to the emulator instance if this variable is set.

3. Run the application.

   ./target/datastore-sample
   

4. The application will run through some basic Datastore operations and log some output statements.

   Successfully added entity.
   Reading entity: f806384f-259d-4d04-8c69-1ae0d83c063c
   Successfully deleted entity: f806384f-259d-4d04-8c69-1ae0d83c063c
   Run dummy transaction code.
   Found entity: Entity{key=Key{projectId=my-kubernetes-codelab-217414, namespace=graalvm-test-namespace, path=[PathElement{kind=test-kind, id=null, name=2cbd912e-8074-4430-802d-32e60102afb2}]}, properties={description=StringValue{valueType=STRING, excludeFromIndexes=false, meaning=0, value=hello world}}}
   Ran transaction callable.