hadoop AuditLogHiveTableParser 源码
haddop AuditLogHiveTableParser 代码
文件路径：/hadoop-tools/hadoop-dynamometer/hadoop-dynamometer-workload/src/main/java/org/apache/hadoop/tools/dynamometer/workloadgenerator/audit/AuditLogHiveTableParser.java
/**
* 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.hadoop.tools.dynamometer.workloadgenerator.audit;
import java.io.IOException;
import java.util.function.Function;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;
/**
* This {@link AuditCommandParser} is used to read commands assuming that the
* input was generated by a Hive query storing uncompressed output files, in
* which fields should be separated by the start-of-heading (U+0001) character.
* The fields available should be, in order:
*
* <pre>
* relativeTimestampMs,ugi,command,src,dest,sourceIP
* </pre>
*
* Where relativeTimestampMs represents the time elapsed between the start of
* the audit log and the occurrence of the audit event. Assuming your audit logs
* are available in Hive, this can be generated with a query looking like:
*
* <pre>
* INSERT OVERWRITE DIRECTORY '${outputPath}'
* SELECT (timestamp - ${startTime} AS relTime, ugi, cmd, src, dst, ip
* FROM '${auditLogTableLocation}'
* WHERE
* timestamp {@literal >=} ${startTime}
* AND timestamp {@literal <} ${endTime}
* DISTRIBUTE BY src
* SORT BY relTime ASC;
* </pre>
*
* Note that the sorting step is important; events in each distinct file must be
* in time-ascending order.
*/
public class AuditLogHiveTableParser implements AuditCommandParser {
private static final String FIELD_SEPARATOR = "\u0001";
@Override
public void initialize(Configuration conf) throws IOException {
// Nothing to be done
}
@Override
public AuditReplayCommand parse(Text inputLine,
Function<Long, Long> relativeToAbsolute) throws IOException {
String[] fields = inputLine.toString().split(FIELD_SEPARATOR);
long absoluteTimestamp = relativeToAbsolute
.apply(Long.parseLong(fields[0]));
return new AuditReplayCommand(absoluteTimestamp, fields[1], fields[2],
fields[3], fields[4], fields[5]);
}
}
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