/*
* 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.flink.storm.util;
import org.apache.storm.task.TopologyContext;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Map;
/**
* Implements a sink that write the received data to the given file (as a result of {@code Object.toString()} for each
* attribute).
*/
public final class BoltFileSink extends AbstractBoltSink {
private static final long serialVersionUID = 2014027288631273666L;
private final String path;
private BufferedWriter writer;
public BoltFileSink(final String path) {
this(path, new SimpleOutputFormatter());
}
public BoltFileSink(final String path, final OutputFormatter formatter) {
super(formatter);
this.path = path;
}
@SuppressWarnings("rawtypes")
@Override
public void prepareSimple(final Map stormConf, final TopologyContext context) {
try {
this.writer = new BufferedWriter(new FileWriter(this.path));
} catch (final IOException e) {
throw new RuntimeException(e);
}
}
@Override
public void writeExternal(final String line) {
try {
this.writer.write(line + "\n");
} catch (final IOException e) {
throw new RuntimeException(e);
}
}
@Override
public void cleanup() {
if (this.writer != null) {
try {
this.writer.close();
} catch (final IOException e) {
throw new RuntimeException(e);
}
}
}
}