CloudMonitoringAuthSample.java Source code

Introduction

Here is the source code for CloudMonitoringAuthSample.java

Source

/**
 * Copyright (c) 2015 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
// [START all]
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.cloudmonitoring.CloudMonitoring;
import com.google.api.services.cloudmonitoring.CloudMonitoringScopes;

import java.io.IOException;
import java.security.GeneralSecurityException;

/**
 * Simple command-line program to demonstrate connecting to and retrieving data
 * from the Google Cloud Monitoring API using application default credentials.
 * Please see README.md on instructions to run.
 */
public final class CloudMonitoringAuthSample {

    /**
     * The metric that we want to fetch.
     */
    private static final String METRIC = "compute.googleapis.com/instance/disk/read_ops_count";

    /**
     * The end of the time interval to fetch.
     */
    private static final String YOUNGEST = "2015-01-01T00:00:00Z";

    /**
     * Utility class doesn't need to be instantiated.
     */
    private CloudMonitoringAuthSample() {
    }

    /**
     * Builds and returns a CloudMonitoring service object authorized with the
     * application default credentials.
     *
     * @return CloudMonitoring service object that is ready to make requests.
     * @throws GeneralSecurityException if authentication fails.
     * @throws IOException if authentication fails.
     */
    private static CloudMonitoring authenticate() throws GeneralSecurityException, IOException {
        // Grab the Application Default Credentials from the environment.
        GoogleCredential credential = GoogleCredential.getApplicationDefault()
                .createScoped(CloudMonitoringScopes.all());

        // Create and return the CloudMonitoring service object
        HttpTransport httpTransport = new NetHttpTransport();
        JsonFactory jsonFactory = new JacksonFactory();
        CloudMonitoring service = new CloudMonitoring.Builder(httpTransport, jsonFactory, credential)
                .setApplicationName("Demo").build();
        return service;
    }

    /**
     * Query the Google Cloud Monitoring API using a service account and print the
     * result to the console.
     *
     * @param args The first arg should be the project name you'd like to inspect.
     * @throws Exception if something goes wrong.
     */
    public static void main(final String[] args) throws Exception {
        if (args.length != 1) {
            System.err.println(
                    String.format("Usage: %s <project-name>", CloudMonitoringAuthSample.class.getSimpleName()));
            return;
        }

        String project = args[0];

        // Create an authorized API client
        CloudMonitoring cloudmonitoring = authenticate();

        CloudMonitoring.Timeseries.List timeseriesListRequest = cloudmonitoring.timeseries().list(project, METRIC,
                YOUNGEST);

        System.out.println("Timeseries.list raw response:");
        System.out.println(timeseriesListRequest.execute().toPrettyString());

    }
}
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