Package com.streak.logging.analysis

Source Code of com.streak.logging.analysis.BigqueryStatusServlet

/*
* Copyright 2012 Rewardly 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.
*/

package com.streak.logging.analysis;

import java.io.IOException;
import java.util.List;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.api.client.googleapis.extensions.appengine.auth.oauth2.AppIdentityCredential;
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.jackson.JacksonFactory;
import com.google.api.services.bigquery.Bigquery;
import com.google.api.services.bigquery.Bigquery.Jobs.Get;
import com.google.api.services.bigquery.model.Job;
import com.google.api.services.bigquery.model.JobList;
import com.google.api.services.bigquery.model.JobList.Jobs;
import com.google.api.services.bigquery.model.ProjectList;
import com.google.api.services.bigquery.model.ProjectList.Projects;
import com.google.gson.Gson;
import com.streak.logging.utils.AnalysisConstants;

/**
* Diagnostic servlet that lists visible BigQuery projects and jobs.
*/
@SuppressWarnings("serial")
public class BigqueryStatusServlet extends HttpServlet {
  private static final HttpTransport HTTP_TRANSPORT = new NetHttpTransport();
  private static final JsonFactory JSON_FACTORY = new JacksonFactory();

  public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
    resp.setContentType("application/json");
    AppIdentityCredential credential = new AppIdentityCredential(AnalysisConstants.SCOPES);
    Bigquery bigquery = new Bigquery.Builder(HTTP_TRANSPORT, JSON_FACTORY, credential).setApplicationName("Streak Logs").build();

    String jobId = req.getParameter(AnalysisConstants.JOB_ID_PARAM);
    Object retVal = null;
    if (jobId == null) {
      retVal = listAllJobs(resp, bigquery);
    }
    else {
      retVal = listJob(resp, bigquery, jobId);
    }
    resp.getWriter().println(new Gson().toJson(retVal));
  }

  public List<Jobs> listAllJobs(HttpServletResponse resp, Bigquery bigquery) throws IOException {
    Bigquery.Projects.List projectRequest = bigquery.projects().list();
    ProjectList projectResponse = projectRequest.execute();

    Bigquery.Jobs.List jobsRequest = bigquery.jobs().list(projectResponse.getProjects().get(0).getId());
    JobList jobsResponse = jobsRequest.execute();
    return jobsResponse.getJobs();
  }

  public Job listJob(HttpServletResponse resp, Bigquery bigquery, String jobId) throws IOException {
    Bigquery.Projects.List projectRequest = bigquery.projects().list();
    ProjectList projectResponse = projectRequest.execute();

    if (projectResponse.getTotalItems() == 0) {
      return null;
    }

    Projects project = projectResponse.getProjects().get(0);
    Get jobsRequest = bigquery.jobs().get(project.getId(), jobId);
    Job j = jobsRequest.execute();
    return j;
  }
}
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