[927] | 1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
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| 2 | // |
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| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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| 4 | // you may not use this file except in compliance with the License. |
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| 5 | // You may obtain a copy of the License at |
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| 6 | // |
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| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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| 8 | // |
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| 9 | // Unless required by applicable law or agreed to in writing, software |
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| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 12 | // See the License for the specific language governing permissions and |
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| 13 | // limitations under the License. |
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| 14 | |
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[857] | 15 | package de.ugoe.cs.autoquest.htmlmonitor; |
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| 16 | |
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| 17 | /** |
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| 18 | * <p> |
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[870] | 19 | * convenience interface for all components making up the HTML monitor. All components implement |
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| 20 | * this interface to ensure homogeneity throughout them. A component must first be initialized |
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| 21 | * ({@link #init()}), then started ({@link #start()}) and finally stopped ({@link #stop()}). |
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[857] | 22 | * </p> |
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| 23 | * |
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| 24 | * @author Patrick Harms |
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| 25 | */ |
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[871] | 26 | interface HtmlMonitorComponent { |
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[857] | 27 | |
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| 28 | /** |
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[870] | 29 | * initializes a component, i.e. it does everything needed to prepare starting the component |
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[857] | 30 | * |
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[870] | 31 | * @throws IllegalStateException thrown if the method was already called before but |
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| 32 | * {@link #stop()} wasn't called yet |
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| 33 | * @throws HtmlMonitorException thrown if the initialization fails, e.g. because needed infos |
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| 34 | * are missing |
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[857] | 35 | */ |
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| 36 | void init() throws IllegalStateException, HtmlMonitorException; |
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| 37 | |
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| 38 | /** |
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[870] | 39 | * starts a component |
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[857] | 40 | * |
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[870] | 41 | * @throws IllegalStateException thrown if {@link #init()} wasn't called yet of if the component |
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| 42 | * is already started through a preceding call to this method |
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| 43 | * @throws HtmlMonitorException thrown if the startup fails, e.g. because needed infos |
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| 44 | * are missing |
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[857] | 45 | */ |
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| 46 | void start() throws IllegalStateException, HtmlMonitorException; |
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| 47 | |
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| 48 | /** |
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[870] | 49 | * stops a component and cleans up any derivate. In the following, {@link #init()} must be |
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| 50 | * callable again. If the component is not initialized or started, nothing must happen. If the |
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| 51 | * component is initialized but not started, the initialization is revoked. |
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[857] | 52 | */ |
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| 53 | void stop(); |
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| 54 | } |
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