org.apache.kafka.connect.file.FileStreamSourceConnector Maven / Gradle / Ivy
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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.file;
import org.apache.kafka.common.config.AbstractConfig;
import org.apache.kafka.common.config.ConfigDef;
import org.apache.kafka.common.config.ConfigDef.Importance;
import org.apache.kafka.common.config.ConfigDef.Type;
import org.apache.kafka.common.config.ConfigException;
import org.apache.kafka.common.utils.AppInfoParser;
import org.apache.kafka.connect.connector.Task;
import org.apache.kafka.connect.source.SourceConnector;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Very simple connector that works with the console. This connector supports both source and
* sink modes via its 'mode' setting.
*/
public class FileStreamSourceConnector extends SourceConnector {
public static final String TOPIC_CONFIG = "topic";
public static final String FILE_CONFIG = "file";
public static final String TASK_BATCH_SIZE_CONFIG = "batch.size";
public static final int DEFAULT_TASK_BATCH_SIZE = 2000;
private static final ConfigDef CONFIG_DEF = new ConfigDef()
.define(FILE_CONFIG, Type.STRING, null, Importance.HIGH, "Source filename. If not specified, the standard input will be used")
.define(TOPIC_CONFIG, Type.LIST, Importance.HIGH, "The topic to publish data to")
.define(TASK_BATCH_SIZE_CONFIG, Type.INT, DEFAULT_TASK_BATCH_SIZE, Importance.LOW,
"The maximum number of records the Source task can read from file one time");
private String filename;
private String topic;
private int batchSize;
@Override
public String version() {
return AppInfoParser.getVersion();
}
@Override
public void start(Map props) {
AbstractConfig parsedConfig = new AbstractConfig(CONFIG_DEF, props);
filename = parsedConfig.getString(FILE_CONFIG);
List topics = parsedConfig.getList(TOPIC_CONFIG);
if (topics.size() != 1) {
throw new ConfigException("'topic' in FileStreamSourceConnector configuration requires definition of a single topic");
}
topic = topics.get(0);
batchSize = parsedConfig.getInt(TASK_BATCH_SIZE_CONFIG);
}
@Override
public Class taskClass() {
return FileStreamSourceTask.class;
}
@Override
public List