import org.apache.hadoop.yarn.server.webapp.dao.AppAttemptsInfo; //导入依赖的package包/类
public AppAttemptsInfo getAppAttempts(HttpServletRequest req,
    HttpServletResponse res, String appId) {
  ApplicationId id = parseApplicationId(appId);
  Collection<ApplicationAttemptReport> appAttemptReports = null;
  try {
    appAttemptReports = appContext.getApplicationAttempts(id).values();
  } catch (IOException e) {
    throw new WebApplicationException(e);
  }
  AppAttemptsInfo appAttemptsInfo = new AppAttemptsInfo();
  for (ApplicationAttemptReport appAttemptReport : appAttemptReports) {
    AppAttemptInfo appAttemptInfo = new AppAttemptInfo(appAttemptReport);
    appAttemptsInfo.add(appAttemptInfo);
  }

  return appAttemptsInfo;
}
 

import org.apache.hadoop.yarn.server.webapp.dao.AppAttemptsInfo; //导入依赖的package包/类
@GET
@Path("/apps/{appid}/appattempts")
@Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
@Override
public AppAttemptsInfo getAppAttempts(@Context HttpServletRequest req,
    @Context HttpServletResponse res, @PathParam("appid") String appId) {
  init(res);
  return super.getAppAttempts(req, res, appId);
}
 

import org.apache.hadoop.yarn.server.webapp.dao.AppAttemptsInfo; //导入依赖的package包/类
public AppAttemptsInfo getAppAttempts(HttpServletRequest req,
    HttpServletResponse res, String appId) {
  UserGroupInformation callerUGI = getUser(req);
  final ApplicationId id = parseApplicationId(appId);
  Collection<ApplicationAttemptReport> appAttemptReports = null;
  try {
    if (callerUGI == null) {
      appAttemptReports = appContext.getApplicationAttempts(id).values();
    } else {
      appAttemptReports = callerUGI.doAs(
          new PrivilegedExceptionAction<Collection<ApplicationAttemptReport>> () {
        @Override
        public Collection<ApplicationAttemptReport> run() throws Exception {
          return appContext.getApplicationAttempts(id).values();
        }
      });
    }
  } catch (Exception e) {
    rewrapAndThrowException(e);
  }
  AppAttemptsInfo appAttemptsInfo = new AppAttemptsInfo();
  for (ApplicationAttemptReport appAttemptReport : appAttemptReports) {
    AppAttemptInfo appAttemptInfo = new AppAttemptInfo(appAttemptReport);
    appAttemptsInfo.add(appAttemptInfo);
  }

  return appAttemptsInfo;
}