2 * Copyright 2006 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.
17 package org.wamblee.crawler.kiss.scheduling;
20 * Interface to the scheduler specific for working with the crawler.
22 * @author Erik Brakkee
24 public interface CrawlerScheduler {
27 * Initializes the scheduler.
28 * @throws Exception In case of problems.
30 void initialize() throws Exception;
33 * Checks if the crawler is running.
34 * @return True iff the crawler is running.
35 * @throws Exception In case of problems.
37 boolean isCrawlerRunning() throws Exception;
40 * Schedules the crawler for immediate execution.
41 * @throws Exception In case of problems.
43 void scheduleNow() throws Exception;
46 * Shuts down the scheduler.
47 * @throws Exception In case of problems.
49 void shutdown() throws Exception;