    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
    015    package org.apache.tapestry5.ioc.internal;
    016
    017    import org.apache.tapestry5.ioc.def.ServiceDef;
    018    import org.apache.tapestry5.ioc.services.ServiceActivityScoreboard;
    019    import org.apache.tapestry5.ioc.services.Status;
    020
    021    /**
    022     * Used to update the status of services defined by the {@link ServiceActivityScoreboard}.
    023     */
    024    public 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    }