@GET @ApiIgnore // until documented
  @Path("{requestId}")
  @Produces("text/plain")
  public Response getUpgradeSummary(@Context HttpHeaders headers,
                                    @Context UriInfo ui,
                                    @PathParam("requestId") Long requestId) {
    return handleRequest(headers, null, ui, Request.Type.GET,
        createResourceInstance(requestId));
  }
Constructor.

@param clusterName the cluster name (not {@code null}).
ambari-server/src/main/java/org/apache/ambari/server/api/services/UpgradeSummaryService.java