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}