See the documentation for more information about authenticating for Google Cloud APIs.

Install Maven.

Build your project with:

mvn clean package -DskipTests

You can then run a given ClassName via:

mvn exec:java -Dexec.mainClass=com.example.storage.ClassName \
    -DpropertyName=propertyValue \
	-Dexec.args="any arguments to the app"

mvn exec:java -Dexec.mainClass=com.google.cloud.auth.samples.AuthExample

mvn exec:java -Dexec.mainClass=com.google.cloud.auth.samples.AuthExample
    -Dexec.args="explicit [path-to-credentials-json]"

mvn exec:java -Dexec.mainClass=com.google.cloud.auth.samples.AuthExample
    -Dexec.args="compute"

Create an API key via the Google Cloud console:

Once you have an API key replace it in the main function in ApiKeyAuthExample and run the following command

mvn exec:java -Dexec.mainClass=com.google.cloud.auth.samples.ApiKeyAuthExample

The same configuration above applies.

This section provides examples for Downscoping with Credential Access Boundaries. There are two examples demonstrating different ways to implement downscoping.

DownscopedAccessTokenGenerator and DownscopedAccessTokenConsumer Examples:

These examples demonstrate a common pattern for downscoping, using a token broker and consumer. The DownscopedAccessTokenGenerator generates the downscoped access token using a client-side approach, and the DownscopedAccessTokenConsumer uses it to access Cloud Storage resources. To run the DownscopedAccessTokenConsumer, you must provide a bucket name and object name under the TODO(developer): in the main method. You can then run DownscopedAccessTokenConsumer via:

mvn exec:java -Dexec.mainClass=com.google.cloud.auth.samples.DownscopedAccessTokenConsumer

DownscopingExample Example:

This example demonstrates downscoping using a server-side approach. To run this example you must provide both a bucket name and object name under the TODO(developer): in the main method of DownscopingExample.

You can then run DownscopingExample via:

mvn exec:java -Dexec.mainClass=com.google.cloud.auth.samples.DownscopingExample

Run all tests:

   mvn clean verify