@GET
  @Produces("text/plain")
  @ApiOperation(value = "Returns a collection of all hosts", response = HostResponse.HostResponseWrapper.class,
          responseContainer = "List")
  @ApiImplicitParams({
    @ApiImplicitParam(name = QUERY_FIELDS, value = QUERY_FILTER_DESCRIPTION, defaultValue = "Hosts/*", dataType = DATA_TYPE_STRING, paramType = PARAM_TYPE_QUERY),
    @ApiImplicitParam(name = QUERY_SORT, value = QUERY_SORT_DESCRIPTION, defaultValue = "Hosts/host_name.asc", dataType = DATA_TYPE_STRING, paramType = PARAM_TYPE_QUERY),
    @ApiImplicitParam(name = QUERY_PAGE_SIZE, value = QUERY_PAGE_SIZE_DESCRIPTION, defaultValue = DEFAULT_PAGE_SIZE, dataType = DATA_TYPE_INT, paramType = PARAM_TYPE_QUERY),
    @ApiImplicitParam(name = QUERY_FROM, value = QUERY_FROM_DESCRIPTION, allowableValues = QUERY_FROM_VALUES, defaultValue = DEFAULT_FROM, dataType = DATA_TYPE_INT, paramType = PARAM_TYPE_QUERY),
    @ApiImplicitParam(name = QUERY_TO, value = QUERY_TO_DESCRIPTION, allowableValues = QUERY_TO_VALUES, dataType = DATA_TYPE_INT, paramType = PARAM_TYPE_QUERY),
  })
  @ApiResponses({
    @ApiResponse(code = HttpStatus.SC_OK, message = MSG_SUCCESSFUL_OPERATION),
    @ApiResponse(code = HttpStatus.SC_NOT_FOUND, message = MSG_CLUSTER_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 getHosts(String body, @Context HttpHeaders headers, @Context UriInfo ui) {
    return handleRequest(headers, body, ui, Request.Type.GET,
        createHostResource(m_clusterName, null));
  }
Handles GET /clusters/{clusterID}/hosts and /hosts
Get all hosts for a cluster.

@param headers http headers
@param ui      uri info
@return host collection resource representation
ambari-server/src/main/java/org/apache/ambari/server/api/services/HostService.java