forked from apache/kafka
/
FileStreamSinkConnector.java
90 lines (78 loc) · 3.21 KB
/
FileStreamSinkConnector.java
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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.TopicPartition;
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.utils.AppInfoParser;
import org.apache.kafka.connect.connector.Task;
import org.apache.kafka.connect.sink.SinkConnector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* Very simple sink connector that works with stdout or a file.
*/
public class FileStreamSinkConnector extends SinkConnector {
private static final Logger log = LoggerFactory.getLogger(FileStreamSinkConnector.class);
public static final String FILE_CONFIG = "file";
static final ConfigDef CONFIG_DEF = new ConfigDef()
.define(FILE_CONFIG, Type.STRING, null, Importance.HIGH, "Destination filename. If not specified, the standard output will be used");
private Map<String, String> props;
@Override
public String version() {
return AppInfoParser.getVersion();
}
@Override
public void start(Map<String, String> props) {
this.props = props;
AbstractConfig config = new AbstractConfig(CONFIG_DEF, props);
String filename = config.getString(FILE_CONFIG);
filename = (filename == null || filename.isEmpty()) ? "standard output" : filename;
log.info("Starting file sink connector writing to {}", filename);
}
@Override
public Class<? extends Task> taskClass() {
return FileStreamSinkTask.class;
}
@Override
public List<Map<String, String>> taskConfigs(int maxTasks) {
ArrayList<Map<String, String>> configs = new ArrayList<>();
for (int i = 0; i < maxTasks; i++) {
configs.add(props);
}
return configs;
}
@Override
public void stop() {
// Nothing to do since FileStreamSinkConnector has no background monitoring.
}
@Override
public ConfigDef config() {
return CONFIG_DEF;
}
@Override
public boolean alterOffsets(Map<String, String> connectorConfig, Map<TopicPartition, Long> offsets) {
// Nothing to do here since FileStreamSinkConnector does not manage offsets externally nor does it require any
// custom offset validation
return true;
}
}