/
SimpleFileNameFormat.java
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/
SimpleFileNameFormat.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.storm.hdfs.trident.format;
import java.net.UnknownHostException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import org.apache.storm.utils.Utils;
public class SimpleFileNameFormat implements FileNameFormat {
private static final long serialVersionUID = 1L;
private int partitionIndex;
private String host;
private String path = "/storm";
private String name = "$TIME.$NUM.txt";
private String timeFormat = "yyyyMMddHHmmss";
@Override
public String getName(long rotation, long timeStamp) {
// compile parameters
SimpleDateFormat dateFormat = new SimpleDateFormat(timeFormat);
String ret = name
.replace("$TIME", dateFormat.format(new Date(timeStamp)))
.replace("$NUM", String.valueOf(rotation))
.replace("$HOST", host)
.replace("$PARTITION", String.valueOf(partitionIndex));
return ret;
}
@Override
public String getPath() {
return path;
}
@SuppressWarnings("unchecked")
@Override
public void prepare(Map conf, int partitionIndex, int numPartitions) {
this.partitionIndex = partitionIndex;
try {
this.host = Utils.localHostname();
} catch (UnknownHostException e) {
throw new RuntimeException(e);
}
}
public SimpleFileNameFormat withPath(String path) {
this.path = path;
return this;
}
/**
* support parameters:<br/>
* $TIME - current time. use <code>withTimeFormat</code> to format.<br/>
* $NUM - rotation number<br/>
* $HOST - local host name<br/>
* $PARTITION - partition index<br/>
*
* @param name
* file name
* @return
*/
public SimpleFileNameFormat withName(String name) {
this.name = name;
return this;
}
public SimpleFileNameFormat withTimeFormat(String timeFormat) {
//check format
try{
new SimpleDateFormat(timeFormat);
}catch (Exception e) {
throw new IllegalArgumentException("invalid timeFormat: "+e.getMessage());
}
this.timeFormat = timeFormat;
return this;
}
}