    001// Copyright 2007 The Apache Software Foundation
    002//
    003// Licensed under the Apache License, Version 2.0 (the "License");
    004// you may not use this file except in compliance with the License.
    005// You may obtain a copy of the License at
    006//
    007//     http://www.apache.org/licenses/LICENSE-2.0
    008//
    009// Unless required by applicable law or agreed to in writing, software
    010// distributed under the License is distributed on an "AS IS" BASIS,
    011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012// See the License for the specific language governing permissions and
    013// limitations under the License.
    014
    015package org.apache.tapestry5.ioc.internal;
    016
    017import org.apache.tapestry5.ioc.def.ServiceDef;
    018import org.apache.tapestry5.ioc.services.ServiceActivityScoreboard;
    019import org.apache.tapestry5.ioc.services.Status;
    020
    021/**
    022 * Used to update the status of services defined by the {@link ServiceActivityScoreboard}.
    023 */
    024public interface ServiceActivityTracker
    025{
    026
    027    /**
    028     * Defines a service in the tracker with an initial status.
    029     *
    030     * @param serviceDef    the service being defined
    031     * @param initialStatus typically {@link Status#BUILTIN} or {@link Status#DEFINED}
    032     */
    033    void define(ServiceDef serviceDef, Status initialStatus);
    034
    035    /**
    036     * Updates the status for the service.
    037     *
    038     * @param serviceId identifies the service, which must be previously defined
    039     * @param status    the new status value
    040     */
    041    void setStatus(String serviceId, Status status);
    042}