2 * Copyright 2007 the original author or authors.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 package org.wamblee.system;
19 * A component represents a part of a system that requires a
20 * number of interfaces and provides a number of interfaces.
22 * @author Erik Brakkee
24 public interface Component {
27 NOT_STARTED, RUNNING, STOPPED
31 * Gets the status of the component.
37 * Gets the name of the subsystem.
38 * @return Subsystem name.
43 * Gets a description of the provided interfaces.
44 * @return Provided interfaces.
46 ProvidedInterface[] getProvidedServices();
49 * Gets a description of the required interfaces.
50 * @return Required interfaces.
52 RequiredInterface[] getRequiredServices();
56 * Initialises the subsytem by starting all the services that
57 * it described as provided.
58 * @param aContext Unique name for the subsystem.
60 void start(String aContext);
68 * Gets the list of running services in the subsystem.
70 * This method may only be called after the
71 * {@link #initialize(String, Service[])} has been called.
74 ProvidedInterface[] getRunningServices();