java - BigQuery and OAuth2

Question

I'm trying to access Google BigQuery using Service Account approach. My code is as follows:

private static final HttpTransport HTTP_TRANSPORT = new NetHttpTransport();

private static final JsonFactory JSON_FACTORY = new JacksonFactory();

GoogleCredential credentials = new GoogleCredential.Builder()
            .setTransport(HTTP_TRANSPORT)
            .setJsonFactory(JSON_FACTORY)
            .setServiceAccountId("[email protected]")
            .setServiceAccountScopes(BigqueryScopes.BIGQUERY)
            .setServiceAccountPrivateKeyFromP12File(
                    new File("PATH-TO-privatekey.p12"))
            .build();
    Bigquery bigquery = Bigquery.builder(HTTP_TRANSPORT, JSON_FACTORY).setHttpRequestInitializer(credentials)
            .build();
    com.google.api.services.bigquery.Bigquery.Datasets.List datasetRequest = bigquery.datasets().list(
            "PROJECT_ID");

    DatasetList datasetList = datasetRequest.execute();
    if (datasetList.getDatasets() != null) {
        java.util.List<Datasets> datasets = datasetList.getDatasets();
        System.out.println("Available datasets
----------------");
        for (Datasets dataset : datasets) {
            System.out.format("%s
", dataset.getDatasetReference().getDatasetId());
        }
    }

But it throws the following exception:

Exception in thread "main"  com.google.api.client.googleapis.json.GoogleJsonResponseException: 401 Unauthorized
{
  "code" : 401,
  "errors" : [ {
    "domain" : "global",
    "location" : "Authorization",
    "locationType" : "header",
    "message" : "Authorization required",
    "reason" : "required"
  } ],
  "message" : "Authorization required"
}
at com.google.api.client.googleapis.json.GoogleJsonResponseException.from(GoogleJsonResponseException.java:159)
at com.google.api.client.googleapis.json.GoogleJsonResponseException.execute(GoogleJsonResponseException.java:187)
at com.google.api.client.googleapis.services.GoogleClient.executeUnparsed(GoogleClient.java:115)
at com.google.api.client.http.json.JsonHttpRequest.executeUnparsed(JsonHttpRequest.java:112)
at com.google.api.services.bigquery.Bigquery$Datasets$List.execute(Bigquery.java:979)

The exception is fired on this line:

  DatasetList datasetList = datasetRequest.execute();

I'm getting the account ID from Google's API console from the second line on the section that looks like this:

    Client ID:  XXXXX.apps.googleusercontent.com
    Email address:  [email protected]

What am I missing?

Answer 1

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