Package org.apache.hadoop.io.erasurecode

Class CodecRegistry

java.lang.Object

org.apache.hadoop.io.erasurecode.CodecRegistry

@Private
public final class CodecRegistry
extends java.lang.Object

This class registers all coder implementations. CodecRegistry maps codec names to coder factories. All coder factories are dynamically identified and loaded using ServiceLoader.

Method Summary

Modifier and Type	Method	Description
java.util.Map<java.lang.String,java.lang.String>	getCodec2CoderCompactMap()	Get all codec names and their corresponding coder list.
java.util.Set<java.lang.String>	getCodecNames()	Get all codec names.
RawErasureCoderFactory	getCoderByName(java.lang.String codecName, java.lang.String coderName)	Get a specific coder factory defined by codec name and coder name.
java.lang.String[]	getCoderNames(java.lang.String codecName)	Get all coder names of the given codec.
java.util.List<RawErasureCoderFactory>	getCoders(java.lang.String codecName)	Get all coder factories of the given codec.
static CodecRegistry	getInstance()

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static CodecRegistry getInstance()

getCoderNames

public java.lang.String[] getCoderNames(java.lang.String codecName)

Get all coder names of the given codec.

Parameters:

codecName - the name of codec

Returns:

an array of all coder names, null if not exist

getCoders

public java.util.List<RawErasureCoderFactory> getCoders(java.lang.String codecName)

Get all coder factories of the given codec.

Parameters:

codecName - the name of codec

Returns:

a list of all coder factories, null if not exist

getCodecNames

public java.util.Set<java.lang.String> getCodecNames()

Get all codec names.

Returns:

a set of all codec names

getCoderByName

public RawErasureCoderFactory getCoderByName(java.lang.String codecName,
                                             java.lang.String coderName)

Get a specific coder factory defined by codec name and coder name.

Parameters:

codecName - name of the codec

coderName - name of the coder

Returns:

the specific coder, null if not exist

getCodec2CoderCompactMap

public java.util.Map<java.lang.String,java.lang.String> getCodec2CoderCompactMap()

Get all codec names and their corresponding coder list.

Returns:

a map of all codec names, and their corresponding code list separated by ','.