Package org.apache.hadoop.hdfs.server.common.blockaliasmap.impl

Class LevelDBFileRegionAliasMap.LevelDBReader

java.lang.Object

org.apache.hadoop.hdfs.server.common.blockaliasmap.BlockAliasMap.Reader<FileRegion>

org.apache.hadoop.hdfs.server.common.blockaliasmap.impl.LevelDBFileRegionAliasMap.LevelDBReader

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, java.lang.Iterable<FileRegion>

Enclosing class:

LevelDBFileRegionAliasMap

public static class LevelDBFileRegionAliasMap.LevelDBReader
extends BlockAliasMap.Reader<FileRegion>

This class is used as a reader for block maps which are stored as LevelDB files.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	LevelDBFileRegionAliasMap.LevelDBReader.Options	Options for LevelDBFileRegionAliasMap.LevelDBReader.

Method Summary

Modifier and Type	Method	Description
void	close()
java.util.Iterator<FileRegion>	iterator()
java.util.Optional<FileRegion>	resolve(org.apache.hadoop.hdfs.protocol.Block block)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Detail

resolve

public java.util.Optional<FileRegion> resolve(org.apache.hadoop.hdfs.protocol.Block block)
                                       throws java.io.IOException

Specified by:

resolve in class BlockAliasMap.Reader<FileRegion>

Parameters:

block - block to resolve

Returns:

BlockAlias corresponding to the provided block.

Throws:

java.io.IOException

iterator

public java.util.Iterator<FileRegion> iterator()

close

public void close()
           throws java.io.IOException

Throws:

java.io.IOException