org.apache.cassandra.db.commitlog

Class CommitLogArchiver

java.lang.Object

org.apache.cassandra.db.commitlog.CommitLogArchiver

public class CommitLogArchiver
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
java.util.Map<java.lang.String,java.util.concurrent.Future<?>>	archivePending
static java.time.format.DateTimeFormatter	format

Constructor Summary

Constructors

Constructor and Description
CommitLogArchiver(java.lang.String archiveCommand, java.lang.String restoreCommand, java.lang.String restoreDirectories, long restorePointInTimeInMicroseconds, java.util.concurrent.TimeUnit precision)

Method Summary

Modifier and Type	Method and Description
static CommitLogArchiver	construct()
static CommitLogArchiver	disabled()
static long	getRestorationPointInTimeInMicroseconds(java.lang.String restorationPointInTime) We change the restore_point_in_time from configuration file into microseconds level as Cassandra use microseconds as the timestamp.
long	getRestorePointInTimeInMicroseconds()
void	maybeArchive(CommitLogSegment segment)
void	maybeArchive(java.lang.String path, java.lang.String name) Differs from the above because it can be used on any file, rather than only managed commit log segments (and thus cannot call waitForFinalSync), and in the treatment of failures.
void	maybeRestoreArchive()
boolean	maybeWaitForArchiving(java.lang.String name)
void	setPrecision(java.util.concurrent.TimeUnit timeUnit)
void	setRestorePointInTimeInMicroseconds(long restorePointInTimeInMicroseconds)

Methods inherited from class java.lang.Object

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

Field Detail

format

public static final java.time.format.DateTimeFormatter format

archivePending

public final java.util.Map<java.lang.String,java.util.concurrent.Future<?>> archivePending

Constructor Detail

CommitLogArchiver

public CommitLogArchiver(java.lang.String archiveCommand,
                         java.lang.String restoreCommand,
                         java.lang.String restoreDirectories,
                         long restorePointInTimeInMicroseconds,
                         java.util.concurrent.TimeUnit precision)

Method Detail

disabled

public static CommitLogArchiver disabled()

construct

public static CommitLogArchiver construct()

maybeArchive

public void maybeArchive(CommitLogSegment segment)

maybeArchive

public void maybeArchive(java.lang.String path,
                         java.lang.String name)

Differs from the above because it can be used on any file, rather than only managed commit log segments (and thus cannot call waitForFinalSync), and in the treatment of failures.

Used to archive files present in the commit log directory at startup (CASSANDRA-6904). Since the files being already archived by normal operation could cause subsequent hard-linking or other operations to fail, we should not throw errors on failure

maybeWaitForArchiving

public boolean maybeWaitForArchiving(java.lang.String name)

maybeRestoreArchive

public void maybeRestoreArchive()

getRestorationPointInTimeInMicroseconds

public static long getRestorationPointInTimeInMicroseconds(java.lang.String restorationPointInTime)

We change the restore_point_in_time from configuration file into microseconds level as Cassandra use microseconds as the timestamp.

Parameters:

restorationPointInTime - value of "restore_point_in_time" in properties file.

Returns:

microseconds value of restore_point_in_time

getRestorePointInTimeInMicroseconds

public long getRestorePointInTimeInMicroseconds()

setRestorePointInTimeInMicroseconds

public void setRestorePointInTimeInMicroseconds(long restorePointInTimeInMicroseconds)

setPrecision

public void setPrecision(java.util.concurrent.TimeUnit timeUnit)