@GET
  @Path("{id}")
  @Produces(MediaType.TEXT_PLAIN)
  @ApiOperation(value = "Returns information about a specific mpack that is registered with this Ambari instance",
    response = MpackResponseWrapper.class)
  @ApiImplicitParams({
    @ApiImplicitParam(name = QUERY_FIELDS, value = QUERY_FILTER_DESCRIPTION, dataType = DATA_TYPE_STRING,
      paramType = PARAM_TYPE_QUERY, defaultValue = MpackResourceProvider.ALL_PROPERTIES),
  })
  @ApiResponses({
    @ApiResponse(code = HttpStatus.SC_OK, message = MSG_SUCCESSFUL_OPERATION),
    @ApiResponse(code = HttpStatus.SC_NOT_FOUND, message = MSG_RESOURCE_NOT_FOUND),
    @ApiResponse(code = HttpStatus.SC_UNAUTHORIZED, message = MSG_NOT_AUTHENTICATED),
    @ApiResponse(code = HttpStatus.SC_FORBIDDEN, message = MSG_PERMISSION_DENIED),
    @ApiResponse(code = HttpStatus.SC_INTERNAL_SERVER_ERROR, message = MSG_SERVER_ERROR),
  })
  public Response getMpack(String body, @Context HttpHeaders headers, @Context UriInfo ui,
    @PathParam("id") String id) {

    return handleRequest(headers, body, ui, Request.Type.GET,
            createMpackResource(id));
  }
Handles: GET /mpacks/{id}
Return a specific mpack given an id

@param
ambari-server/src/main/java/org/apache/ambari/server/api/services/MpacksService.java