GoogleAnalytics Report API 연계

/**
 * GoogleAnalytics VO
 * @author JH
 * @since 2018.08.21
 */
public class GAVo{

  private String start;
  private String end;
  private int type;

  public String getStart() {
    return start;
  }
  public void setStart(String start) {
    this.start = start;
  }
  public String getEnd() {
    return end;
  }
  public void setEnd(String end) {
    this.end = end;
  }

  /**
   * set HelperEnumCode <p>
   * 1 : 방문자 <p>
   * 2 : 총 페이지뷰 <p>
   * 3 : 브라우저별 <p>
   * 4 : 모니터 해상도별 <p>
   * 5 : 이전 접속 사이트 <p>
   * 6 : 검색엔진 단어별 <p>
   * 7 : 가장 많이본 사이트 <p>
   * @param type
   */
  public void setType(int type) {
    this.type = type;
  }

  /**
   * @return type에 맞는 GAHelper.Type 반환
   */
  public GAHelper getHelper(){
    switch(this.type){
      case 1 : return GAHelper.VISIT_USER;
      case 2 : return GAHelper.TOTAL_VIEW_COUNT;
      case 3 : return GAHelper.BROWSER;
      case 4 : return GAHelper.RESOLUTION;
      case 5 : return GAHelper.REFFER;
      case 6 : return GAHelper.KEYWORD;
      case 7 : return GAHelper.PAGE_PATH;
      default : return null;
    }
  }

/**
 * GA Reporting API Request Creator
 * @author JH
 * @since 2018.08.21
 */
public class GARequester {
  private List<ReportRequest> requests;
  private File file;

  private GARequester(List<ReportRequest> requests, File file){
    this.requests = requests;
    this.file = file;
  }

  public GetReportsResponse request() throws GeneralSecurityException, IOException{
    AnalyticsReporting service = GAHelper.initializeAnalyticsReporting(file);
    GetReportsRequest getReport = new GetReportsRequest().setReportRequests(requests);
    GetReportsResponse response = service.reports().batchGet(getReport).execute();
    return response;
  }

  /**
   * GARequester Builder
   * @author JH
   * @since 2018.08.21
   */
  public static class Builder{

    String startDate;
    String endDate;
    GAHelper helper;
    File file;

    public Builder setStartDate(String startDate){
      this.startDate = startDate;
      return this;
    }
    public Builder setEndDate(String endDate){
      this.endDate = endDate;
      return this;
    }

    public Builder setHelper(GAHelper helper){
      this.helper = helper;
      return this;
    }

    public Builder setFile(File file){
      this.file = file;
      return this;
    }

    public GARequester build(){
      ReportRequest request = new ReportRequest()
          .setViewId(GAHelper.VIEW_ID)
          .setDateRanges(this.helper.createDateRange(startDate, endDate))
          .setMetrics(this.helper.createMetric())
          .setDimensions(this.helper.createDimension())
          .setIncludeEmptyRows(true);
      return new GARequester(Arrays.asList(request), file);
    }
  }
}

/**
 * GA Helper <p>
 * 조회타입에 맞게 파라미터 미리 정의 <p>
 * {@link https://developers.google.com/analytics/devguides/reporting/core/v4}
 *
 * @author JH
 * @since 2018.08.21
 */
public enum GAHelper {

  VISIT_USER("ga:sessions", "ga:date", null, "user"),
  TOTAL_VIEW_COUNT("ga:pageviews", "ga:date", null, "totalViewCount"),
  BROWSER("ga:sessions", "ga:browser", null, "browser"),
  RESOLUTION("ga:sessions","ga:screenResolution", null, "resolution"),
  REFFER("ga:sessions", "ga:keyword", null, "reffer"),
  KEYWORD("ga:sessions", "ga:fullReferrer", null, "keyword"),
  PAGE_PATH("ga:users", "ga:pagePath", null, "pagePath");

  private String metrics;
  private String dimensions;
  private String filter;
  private String alias;

  static final String APPLICATION_NAME = "DEMO";
  static final GsonFactory GSON_FACTORY = GsonFactory.getDefaultInstance();
  static final String VIEW_ID = "DEMO";

  GAHelper(String metrics, String dimensions, String filter, String alias) {
    this.metrics = metrics;
    this.dimensions = dimensions;
    this.filter = filter;
    this.alias = alias;
  }

  /**
   * QueryParameter DateRange
   * @param start
   * @param end
   * @return dateRangeList
   */
  public List<DateRange> createDateRange(String start, String end) {
    //...
    return list;
  }

  /**
   * QueryParameter Metric 초기화
   * @return metricList
   */
  public List<Metric> createMetric() {
    //...
    return list;
  }

  /**
   * QueryParameter Dimension 초기화
   * @return dimenssionList
   */
  public List<Dimension> createDimension() {
    //...
    return list;
  }

  /**
   * GA Reporting API 사용권한 검증
   * @return AnalyticsReporting
   * @throws GeneralSecurityException
   * @throws IOException
   */
  static AnalyticsReporting initializeAnalyticsReporting(File file) throws GeneralSecurityException, IOException {

    HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
    GoogleCredential credential = GoogleCredential.fromStream(new FileInputStream(file))
    		.createScoped(AnalyticsReportingScopes.all());

    // Construct the Analytics Reporting service object.
    return new AnalyticsReporting.Builder(httpTransport, GSON_FACTORY, credential)
    		.setApplicationName(APPLICATION_NAME).build();
  }

}