alluxio.master.journal

Class StateChangeJournalContext

java.lang.Object

alluxio.master.journal.StateChangeJournalContext

All Implemented Interfaces:

JournalContext, Closeable, AutoCloseable, java.util.function.Supplier<JournalContext>

@NotThreadSafe
public final class StateChangeJournalContext
extends Object
implements JournalContext

Context for correctly managing the state change lock for a wrapped journal context.

Constructor Summary

Constructors

Constructor and Description
StateChangeJournalContext(JournalContext journalContext, LockResource stateLockResource) Constructs a StateChangeJournalContext.

Method Summary

Modifier and Type	Method and Description
void	append(Journal.JournalEntry entry)
void	close()
void	flush() Flushes all the entries appended by the journal context so far.

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.JournalContext

get

Constructor Detail

StateChangeJournalContext

public StateChangeJournalContext(JournalContext journalContext,
                                 LockResource stateLockResource)

Constructs a StateChangeJournalContext.

Parameters:

journalContext - the journal context to wrap

stateLockResource - the state lock resource to keep

Method Detail

append

public void append(Journal.JournalEntry entry)

Specified by:

append in interface JournalContext

Parameters:

entry - the Journal.JournalEntry to append to the journal

flush

public void flush()
           throws UnavailableException

Description copied from interface: JournalContext

Flushes all the entries appended by the journal context so far. This method can be called multiple times within the life cycle of the journal context The journals will be committed synchronously (example MasterJournalContext, or only added into the async journal writer (example MetadataSyncMergeJournalContext, based on different implementations.

Specified by:

flush in interface JournalContext

Throws:

UnavailableException

close

public void close()
           throws UnavailableException

Specified by:

close in interface JournalContext

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

UnavailableException