/*
* 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 with
* the License. You may obtain a copy of the License at
*
* 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.kafka.connect.file;
import org.apache.kafka.connect.errors.ConnectException;
import org.apache.kafka.connect.source.SourceRecord;
import org.apache.kafka.connect.source.SourceTaskContext;
import org.apache.kafka.connect.storage.OffsetStorageReader;
import org.easymock.EasyMock;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.powermock.api.easymock.PowerMock;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static org.junit.Assert.assertEquals;
public class FileStreamSourceTaskTest {
private static final String TOPIC = "test";
private File tempFile;
private Map<String, String> config;
private OffsetStorageReader offsetStorageReader;
private SourceTaskContext context;
private FileStreamSourceTask task;
private boolean verifyMocks = false;
@Before
public void setup() throws IOException {
tempFile = File.createTempFile("file-stream-source-task-test", null);
config = new HashMap<>();
config.put(FileStreamSourceConnector.FILE_CONFIG, tempFile.getAbsolutePath());
config.put(FileStreamSourceConnector.TOPIC_CONFIG, TOPIC);
task = new FileStreamSourceTask();
offsetStorageReader = PowerMock.createMock(OffsetStorageReader.class);
context = PowerMock.createMock(SourceTaskContext.class);
task.initialize(context);
}
@After
public void teardown() {
tempFile.delete();
if (verifyMocks)
PowerMock.verifyAll();
}
private void replay() {
PowerMock.replayAll();
verifyMocks = true;
}
@Test
public void testNormalLifecycle() throws InterruptedException, IOException {
expectOffsetLookupReturnNone();
replay();
task.start(config);
FileOutputStream os = new FileOutputStream(tempFile);
assertEquals(null, task.poll());
os.write("partial line".getBytes());
os.flush();
assertEquals(null, task.poll());
os.write(" finished\n".getBytes());
os.flush();
List<SourceRecord> records = task.poll();
assertEquals(1, records.size());
assertEquals(TOPIC, records.get(0).topic());
assertEquals("partial line finished", records.get(0).value());
assertEquals(Collections.singletonMap(FileStreamSourceTask.FILENAME_FIELD, tempFile.getAbsolutePath()), records.get(0).sourcePartition());
assertEquals(Collections.singletonMap(FileStreamSourceTask.POSITION_FIELD, 22L), records.get(0).sourceOffset());
assertEquals(null, task.poll());
// Different line endings, and make sure the final \r doesn't result in a line until we can
// read the subsequent byte.
os.write("line1\rline2\r\nline3\nline4\n\r".getBytes());
os.flush();
records = task.poll();
assertEquals(4, records.size());
assertEquals("line1", records.get(0).value());
assertEquals(Collections.singletonMap(FileStreamSourceTask.FILENAME_FIELD, tempFile.getAbsolutePath()), records.get(0).sourcePartition());
assertEquals(Collections.singletonMap(FileStreamSourceTask.POSITION_FIELD, 28L), records.get(0).sourceOffset());
assertEquals("line2", records.get(1).value());
assertEquals(Collections.singletonMap(FileStreamSourceTask.FILENAME_FIELD, tempFile.getAbsolutePath()), records.get(1).sourcePartition());
assertEquals(Collections.singletonMap(FileStreamSourceTask.POSITION_FIELD, 35L), records.get(1).sourceOffset());
assertEquals("line3", records.get(2).value());
assertEquals(Collections.singletonMap(FileStreamSourceTask.FILENAME_FIELD, tempFile.getAbsolutePath()), records.get(2).sourcePartition());
assertEquals(Collections.singletonMap(FileStreamSourceTask.POSITION_FIELD, 41L), records.get(2).sourceOffset());
assertEquals("line4", records.get(3).value());
assertEquals(Collections.singletonMap(FileStreamSourceTask.FILENAME_FIELD, tempFile.getAbsolutePath()), records.get(3).sourcePartition());
assertEquals(Collections.singletonMap(FileStreamSourceTask.POSITION_FIELD, 47L), records.get(3).sourceOffset());
os.write("subsequent text".getBytes());
os.flush();
records = task.poll();
assertEquals(1, records.size());
assertEquals("", records.get(0).value());
assertEquals(Collections.singletonMap(FileStreamSourceTask.FILENAME_FIELD, tempFile.getAbsolutePath()), records.get(0).sourcePartition());
assertEquals(Collections.singletonMap(FileStreamSourceTask.POSITION_FIELD, 48L), records.get(0).sourceOffset());
task.stop();
}
@Test(expected = ConnectException.class)
public void testMissingTopic() throws InterruptedException {
replay();
config.remove(FileStreamSourceConnector.TOPIC_CONFIG);
task.start(config);
}
public void testInvalidFile() throws InterruptedException {
config.put(FileStreamSourceConnector.FILE_CONFIG, "bogusfilename");
task.start(config);
// Currently the task retries indefinitely if the file isn't found, but shouldn't return any data.
for (int i = 0; i < 100; i++)
assertEquals(null, task.poll());
}
private void expectOffsetLookupReturnNone() {
EasyMock.expect(context.offsetStorageReader()).andReturn(offsetStorageReader);
EasyMock.expect(offsetStorageReader.offset(EasyMock.anyObject(Map.class))).andReturn(null);
}
}