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

Class BlockAliasMap.Reader<U extends BlockAlias>

java.lang.Object

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

All Implemented Interfaces:

Closeable, AutoCloseable, Iterable<U>

Direct Known Subclasses:

LevelDBFileRegionAliasMap.LevelDBReader, TextFileRegionAliasMap.TextReader

Enclosing class:

BlockAliasMap<T extends BlockAlias>

public abstract static class BlockAliasMap.Reader<U extends BlockAlias>
extends Object
implements Iterable<U>, Closeable

An abstract class that is used to read BlockAliases for provided blocks.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	BlockAliasMap.Reader.Options reader options.

Constructor Summary

Constructors

Constructor and Description
Reader()

Method Summary

Modifier and Type	Method and Description
abstract Optional<U>	resolve(org.apache.hadoop.hdfs.protocol.Block ident)

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, iterator, spliterator

Methods inherited from interface java.io.Closeable

close

Constructor Detail

Reader

public Reader()

Method Detail

resolve

public abstract Optional<U> resolve(org.apache.hadoop.hdfs.protocol.Block ident)
                             throws IOException

Parameters:

ident - block to resolve

Returns:

BlockAlias corresponding to the provided block.

Throws:

IOException