alluxio.master.file.meta

Class InodeDirectoryIdGenerator

java.lang.Object

alluxio.master.file.meta.InodeDirectoryIdGenerator

All Implemented Interfaces:

Checkpointed, Journaled, JournalEntryIterable

@ThreadSafe
public class InodeDirectoryIdGenerator
extends Object
implements Journaled

Inode id management for directory inodes. Keep track of a block container id, along with a block sequence number. If the block sequence number reaches the limit, a new block container id is retrieved.

Constructor Summary

Constructors

Constructor and Description
InodeDirectoryIdGenerator(ContainerIdGenerable containerIdGenerator)

Method Summary

Modifier and Type	Method and Description
CheckpointName	getCheckpointName()
CloseableIterator<Journal.JournalEntry>	getJournalEntryIterator()
long	peekDirectoryId()
boolean	processJournalEntry(Journal.JournalEntry entry) Attempts to apply a journal entry.
void	resetState() Resets the object's journaled state.

Methods inherited from class java.lang.Object

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

Methods inherited from interface alluxio.master.journal.Journaled

applyAndJournal, restoreFromCheckpoint, writeToCheckpoint

Constructor Detail

InodeDirectoryIdGenerator

public InodeDirectoryIdGenerator(ContainerIdGenerable containerIdGenerator)

Parameters:

containerIdGenerator - the container id generator to use

Method Detail

peekDirectoryId

public long peekDirectoryId()

Returns:

the next directory id

processJournalEntry

public boolean processJournalEntry(Journal.JournalEntry entry)

Description copied from interface: Journaled

Attempts to apply a journal entry.

Specified by:

processJournalEntry in interface Journaled

Parameters:

entry - the entry to apply

Returns:

whether the entry type is supported by this journaled object

resetState

public void resetState()

Description copied from interface: Journaled

Resets the object's journaled state.

Specified by:

resetState in interface Journaled

getJournalEntryIterator

public CloseableIterator<Journal.JournalEntry> getJournalEntryIterator()

Specified by:

getJournalEntryIterator in interface JournalEntryIterable

Returns:

an CloseableIterator that iterates all the journal entries

getCheckpointName

public CheckpointName getCheckpointName()

Specified by:

getCheckpointName in interface Checkpointed

Returns:

a name for this checkpointed class