Google Cloud Authentication

Question

I am working on the Google cloud platform and I need to access the cloud functions using a java non-web application, for example, I am trying to store and retrieve an object from Google cloud storage using the Google Cloud Storage JSON API.

Before contacting those who need to authenticate my application, I discovered that the authorization API has authorized access.

when I tried to get credentials from the Google Cloud platform, I get three credential options:

• API Key
• OAuth Client Id
• Service account key

I have looked at the GCP documentation but am not getting clear information that is different from them, I am pretty much new to GCP, so could you please share a link to any information or blog that explains the type of these credentials with examples of Java programs that show how to use the Google Cloud client API .

Answer 1

The Google Cloud Platform Virtual Platform Guide is the ultimate resource here:   https://cloud.google.com/docs/authentication

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Storage storage = StorageOptions.getDefaultInstance().getService();
Bucket bucket = storage.create(BucketInfo.of("myBucketName"));

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Storage storage = StorageOptions.newBuilder()
    .setProjectId(PROJECT_ID)
    .setCredentials(GoogleCredentials.fromStream(
        new FileInputStream(PATH_TO_JSON_KEY))).build();
Bucket bucket = storage.create(BucketInfo.of("myBucketName"));

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