import org.apache.hadoop.yarn.server.webapp.dao.ContainersInfo; //导入依赖的package包/类
public ContainersInfo getContainers(HttpServletRequest req,
    HttpServletResponse res, String appId, String appAttemptId) {
  ApplicationId aid = parseApplicationId(appId);
  ApplicationAttemptId aaid = parseApplicationAttemptId(appAttemptId);
  validateIds(aid, aaid, null);
  Collection<ContainerReport> containerReports = null;
  try {
    containerReports = appContext.getContainers(aaid).values();
  } catch (IOException e) {
    throw new WebApplicationException(e);
  }
  ContainersInfo containersInfo = new ContainersInfo();
  for (ContainerReport containerReport : containerReports) {
    ContainerInfo containerInfo = new ContainerInfo(containerReport);
    containersInfo.add(containerInfo);
  }
  return containersInfo;
}
 

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

import org.apache.hadoop.yarn.server.webapp.dao.ContainersInfo; //导入依赖的package包/类
public ContainersInfo getContainers(HttpServletRequest req,
    HttpServletResponse res, String appId, String appAttemptId) {
  UserGroupInformation callerUGI = getUser(req);
  ApplicationId aid = parseApplicationId(appId);
  final ApplicationAttemptId aaid = parseApplicationAttemptId(appAttemptId);
  validateIds(aid, aaid, null);
  Collection<ContainerReport> containerReports = null;
  try {
    if (callerUGI == null) {
      containerReports = appContext.getContainers(aaid).values();
    } else {
      containerReports = callerUGI.doAs(
          new PrivilegedExceptionAction<Collection<ContainerReport>> () {
        @Override
        public Collection<ContainerReport> run() throws Exception {
          return appContext.getContainers(aaid).values();
        }
      });
    }
  } catch (Exception e) {
    rewrapAndThrowException(e);
  }
  ContainersInfo containersInfo = new ContainersInfo();
  for (ContainerReport containerReport : containerReports) {
    ContainerInfo containerInfo = new ContainerInfo(containerReport);
    containersInfo.add(containerInfo);
  }
  return containersInfo;
}