org.apache.hadoop.hive.ql.processors

Class ErasureProcessor

java.lang.Object

org.apache.hadoop.hive.ql.processors.ErasureProcessor

All Implemented Interfaces:

AutoCloseable, CommandProcessor

public class ErasureProcessor
extends Object
implements CommandProcessor

This class processes hadoop commands used for Erasure Coding. It is meant to be run only by Hive unit tests. The ‘Erasure’ commands implemented by this class allow test writers to use Erasure Coding in Hive. Hdfs determines whether to use Erasure Coding for a file based on the presence of an Erasure Coding Policy on the directory which contains the file. These ‘Erasure’ commands can be used to manipulate Erasure Coding Policies. These commands are similar to the user level commands provided by the ‘hdfs ec’ command as documented at: https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/HDFSErasureCoding.html

• getPolicy: Get an erasure coding policy for a Path.
• enablePolicy: Enable an erasure coding policy.
• removePolicy: Remove an erasure coding policy.
• disablePolicy: Disable an erasure coding policy.
• setPolicy: Sets an erasure coding policy on a directory at the specified path
• unsetPolicy: Unsets an erasure coding policy on a directory at the specified path
• echo: Echo the parameters given to the command (not an ec command)

Method Summary

Modifier and Type	Method and Description
void	close()
static org.apache.hadoop.hive.shims.HadoopShims.HdfsErasureCodingShim	getErasureShim(org.apache.hadoop.conf.Configuration config) Get an instance of HdfsErasureCodingShim from a config.
CommandProcessorResponse	run(String command)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getErasureShim

public static org.apache.hadoop.hive.shims.HadoopShims.HdfsErasureCodingShim getErasureShim(org.apache.hadoop.conf.Configuration config)
                                                                                     throws IOException

Get an instance of HdfsErasureCodingShim from a config.

Throws:

IOException

run

public CommandProcessorResponse run(String command)
                             throws CommandProcessorException

Specified by:

run in interface CommandProcessor

Throws:

CommandProcessorException

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Throws:

Exception