Package 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:

java.io.Closeable, java.lang.AutoCloseable, java.lang.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 java.lang.Object
implements java.lang.Iterable<U>, java.io.Closeable

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

Nested Class Summary

Nested Classes

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

Constructor Summary

Constructors

Constructor	Description
Reader()

Method Summary

Modifier and Type	Method	Description
abstract java.util.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.io.Closeable

close

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Constructor Detail

Reader

public Reader()

Method Detail

resolve

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

Parameters:

ident - block to resolve

Returns:

BlockAlias corresponding to the provided block.

Throws:

java.io.IOException