/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.streams.rss.provider.perpetual;
import org.apache.streams.rss.FeedDetails;
import org.apache.streams.rss.provider.RssStreamProviderTask;
import org.junit.Assert;
import org.junit.Test;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.mock;
/**
* Unit tests for {@link org.apache.streams.rss.provider.perpetual.RssFeedScheduler}
*/
public class RssFeedSchedulerTest {
/**
* Test that feeds are scheduled based on elapsed time correctly.
* Takes 1 minute to run.
*/
@Test
public void testScheduleFeeds() {
ExecutorService mockService = mock(ExecutorService.class);
final List<String> queuedTasks = new ArrayList<>(5);
doAnswer(invocationOnMock -> {
queuedTasks.add(((RssStreamProviderTask) invocationOnMock.getArguments()[0]).getRssFeed());
return null;
}).when(mockService).execute(any(Runnable.class));
RssFeedScheduler scheduler = new RssFeedScheduler(mockService, createFeedList(), new LinkedBlockingQueue<>(), 1);
scheduler.scheduleFeeds();
Assert.assertEquals("Expected 2 Feeds to be scheduled", 2, queuedTasks.size());
Assert.assertEquals("Expected Feed 1 to be queued first", "1", queuedTasks.get(0));
Assert.assertEquals("Expected Feed 2 to be queued second", "2", queuedTasks.get(1));
safeSleep(1);
scheduler.scheduleFeeds();
Assert.assertEquals("Only feed 1 should have been re-queued", 3, queuedTasks.size());
Assert.assertEquals("Only feed 1 should have been re-queued", "1", queuedTasks.get(2));
safeSleep(60 * 1000);
scheduler.scheduleFeeds();
Assert.assertEquals("Both feeds should have been re-queued", 5, queuedTasks.size());
Assert.assertEquals("1", queuedTasks.get(3));
Assert.assertEquals("2", queuedTasks.get(4));
}
private List<FeedDetails> createFeedList() {
List<FeedDetails> list = new LinkedList<>();
FeedDetails fd = new FeedDetails();
fd.setPollIntervalMillis(1L);
fd.setUrl("1");
list.add(fd);
fd = new FeedDetails();
fd.setPollIntervalMillis(60L * 1000);
fd.setUrl("2");
list.add(fd);
return list;
}
private void safeSleep(long milliseconds) {
try {
Thread.sleep(milliseconds);
} catch (InterruptedException ie) {
Thread.currentThread().interrupt();
}
}
}