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* 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.runtime;
import org.apache.kafka.common.config.ConfigDef;
import org.apache.kafka.common.config.ConfigException;
import org.apache.kafka.connect.connector.ConnectRecord;
import org.apache.kafka.connect.connector.Connector;
import org.apache.kafka.connect.runtime.isolation.PluginDesc;
import org.apache.kafka.connect.runtime.isolation.Plugins;
import org.apache.kafka.connect.transforms.Transformation;
import org.junit.Test;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
public class ConnectorConfigTest<R extends ConnectRecord<R>> {
private static final Plugins MOCK_PLUGINS = new Plugins(new HashMap<String, String>()) {
@Override
public Set<PluginDesc<Transformation>> transformations() {
return Collections.emptySet();
}
};
public static abstract class TestConnector extends Connector {
}
public static class SimpleTransformation<R extends ConnectRecord<R>> implements Transformation<R> {
int magicNumber = 0;
@Override
public void configure(Map<String, ?> props) {
magicNumber = Integer.parseInt((String) props.get("magic.number"));
}
@Override
public R apply(R record) {
return null;
}
@Override
public void close() {
magicNumber = 0;
}
@Override
public ConfigDef config() {
return new ConfigDef()
.define("magic.number", ConfigDef.Type.INT, ConfigDef.NO_DEFAULT_VALUE, ConfigDef.Range.atLeast(42), ConfigDef.Importance.HIGH, "");
}
}
@Test
public void noTransforms() {
Map<String, String> props = new HashMap<>();
props.put("name", "test");
props.put("connector.class", TestConnector.class.getName());
new ConnectorConfig(MOCK_PLUGINS, props);
}
@Test(expected = ConfigException.class)
public void danglingTransformAlias() {
Map<String, String> props = new HashMap<>();
props.put("name", "test");
props.put("connector.class", TestConnector.class.getName());
props.put("transforms", "dangler");
new ConnectorConfig(MOCK_PLUGINS, props);
}
@Test(expected = ConfigException.class)
public void wrongTransformationType() {
Map<String, String> props = new HashMap<>();
props.put("name", "test");
props.put("connector.class", TestConnector.class.getName());
props.put("transforms", "a");
props.put("transforms.a.type", "uninstantiable");
new ConnectorConfig(MOCK_PLUGINS, props);
}
@Test(expected = ConfigException.class)
public void unconfiguredTransform() {
Map<String, String> props = new HashMap<>();
props.put("name", "test");
props.put("connector.class", TestConnector.class.getName());
props.put("transforms", "a");
props.put("transforms.a.type", SimpleTransformation.class.getName());
new ConnectorConfig(MOCK_PLUGINS, props);
}
@Test
public void misconfiguredTransform() {
Map<String, String> props = new HashMap<>();
props.put("name", "test");
props.put("connector.class", TestConnector.class.getName());
props.put("transforms", "a");
props.put("transforms.a.type", SimpleTransformation.class.getName());
props.put("transforms.a.magic.number", "40");
try {
new ConnectorConfig(MOCK_PLUGINS, props);
fail();
} catch (ConfigException e) {
assertTrue(e.getMessage().contains("Value must be at least 42"));
}
}
@Test
public void singleTransform() {
Map<String, String> props = new HashMap<>();
props.put("name", "test");
props.put("connector.class", TestConnector.class.getName());
props.put("transforms", "a");
props.put("transforms.a.type", SimpleTransformation.class.getName());
props.put("transforms.a.magic.number", "42");
final ConnectorConfig config = new ConnectorConfig(MOCK_PLUGINS, props);
final List<Transformation<R>> transformations = config.transformations();
assertEquals(1, transformations.size());
final SimpleTransformation xform = (SimpleTransformation) transformations.get(0);
assertEquals(42, xform.magicNumber);
}
@Test(expected = ConfigException.class)
public void multipleTransformsOneDangling() {
Map<String, String> props = new HashMap<>();
props.put("name", "test");
props.put("connector.class", TestConnector.class.getName());
props.put("transforms", "a, b");
props.put("transforms.a.type", SimpleTransformation.class.getName());
props.put("transforms.a.magic.number", "42");
new ConnectorConfig(MOCK_PLUGINS, props);
}
@Test
public void multipleTransforms() {
Map<String, String> props = new HashMap<>();
props.put("name", "test");
props.put("connector.class", TestConnector.class.getName());
props.put("transforms", "a, b");
props.put("transforms.a.type", SimpleTransformation.class.getName());
props.put("transforms.a.magic.number", "42");
props.put("transforms.b.type", SimpleTransformation.class.getName());
props.put("transforms.b.magic.number", "84");
final ConnectorConfig config = new ConnectorConfig(MOCK_PLUGINS, props);
final List<Transformation<R>> transformations = config.transformations();
assertEquals(2, transformations.size());
assertEquals(42, ((SimpleTransformation) transformations.get(0)).magicNumber);
assertEquals(84, ((SimpleTransformation) transformations.get(1)).magicNumber);
}
}