org.elasticsearch.index.translog

クラス TranslogWriter

java.lang.Object

org.elasticsearch.index.translog.TranslogReader

org.elasticsearch.index.translog.TranslogWriter

すべての実装されたインタフェース:

Closeable, AutoCloseable, Comparable<TranslogReader>

直系の既知のサブクラス:

BufferingTranslogWriter

public class TranslogWriter
extends TranslogReader

ネストされたクラスのサマリー

ネストされたクラス

修飾子とタイプ	クラスと説明
static class	TranslogWriter.Type

フィールドのサマリー

フィールド

修飾子とタイプ	フィールドと説明
protected long	lastSyncedOffset
protected int	operationCounter
protected ReleasableLock	readLock
protected ShardId	shardId
static String	TRANSLOG_CODEC
static int	VERSION
static int	VERSION_CHECKPOINTS
static int	VERSION_CHECKSUMS
protected ReleasableLock	writeLock
protected long	writtenOffset

クラスから継承されたフィールド org.elasticsearch.index.translog.TranslogReader

channel, channelReference, closed, firstOperationOffset, generation, UNKNOWN_OP_COUNT

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
TranslogWriter(ShardId shardId, long generation, org.elasticsearch.index.translog.ChannelReference channelReference)

メソッドのサマリー

修飾子とタイプ	メソッドと説明
Translog.Location	add(BytesReference data) add the given bytes to the translog and return the location they were written at
protected void	checkpoint(long lastSyncPosition, int operationCounter, org.elasticsearch.index.translog.ChannelReference channelReference)
protected void	closeWithTragicEvent(Throwable throwable)
static TranslogWriter	create(TranslogWriter.Type type, ShardId shardId, String translogUUID, long fileGeneration, Path file, Callback<org.elasticsearch.index.translog.ChannelReference> onClose, int bufferSize, org.elasticsearch.index.translog.TranslogWriter.ChannelFactory channelFactory)
protected void	ensureOpen()
protected void	flush() Flushes the buffer if the translog is buffered.
Throwable	getTragicException() If this TranslogWriter was closed as a side-effect of a tragic exception, e.g. disk full while flushing a new segment, this returns the root cause exception.
ImmutableTranslogReader	immutableReader() returns a new immutable reader which only exposes the current written operation *
TranslogReader	newReaderFromWriter() returns a new reader that follows the current writes (most importantly allows making repeated snapshots that includes new content)
protected void	readBytes(ByteBuffer buffer, long position) reads bytes at position into the given buffer, filling it.
long	sizeInBytes()
void	sync() write all buffered ops to disk and fsync file
boolean	syncNeeded() returns true if there are buffered ops
boolean	syncUpTo(long offset) Syncs the translog up to at least the given offset unless already synced
int	totalOperations()
void	updateBufferSize(int bufferSize) change the size of the internal buffer if relevant

クラスから継承されたメソッド org.elasticsearch.index.translog.TranslogReader

close, compareTo, getFirstOperationOffset, getGeneration, isClosed, newReaderSnapshot, newSnapshot, open, path, read, read, toString

クラスから継承されたメソッド java.lang.Object

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

フィールドの詳細

TRANSLOG_CODEC

public static final String TRANSLOG_CODEC

関連項目:

定数フィールド値

VERSION_CHECKSUMS

public static final int VERSION_CHECKSUMS

関連項目:

定数フィールド値

VERSION_CHECKPOINTS

public static final int VERSION_CHECKPOINTS

関連項目:

定数フィールド値

VERSION

public static final int VERSION

関連項目:

定数フィールド値

shardId

protected final ShardId shardId

readLock

protected final ReleasableLock readLock

writeLock

protected final ReleasableLock writeLock

lastSyncedOffset

protected volatile long lastSyncedOffset

operationCounter

protected volatile int operationCounter

writtenOffset

protected volatile long writtenOffset

コンストラクタの詳細

TranslogWriter

public TranslogWriter(ShardId shardId,
                      long generation,
                      org.elasticsearch.index.translog.ChannelReference channelReference)
               throws IOException

例外:

IOException

メソッドの詳細

create

public static TranslogWriter create(TranslogWriter.Type type,
                                    ShardId shardId,
                                    String translogUUID,
                                    long fileGeneration,
                                    Path file,
                                    Callback<org.elasticsearch.index.translog.ChannelReference> onClose,
                                    int bufferSize,
                                    org.elasticsearch.index.translog.TranslogWriter.ChannelFactory channelFactory)
                             throws IOException

例外:

IOException

getTragicException

public Throwable getTragicException()

If this TranslogWriter was closed as a side-effect of a tragic exception, e.g. disk full while flushing a new segment, this returns the root cause exception. Otherwise (no tragic exception has occurred) it returns null.

closeWithTragicEvent

protected final void closeWithTragicEvent(Throwable throwable)
                                   throws IOException

例外:

IOException

add

public Translog.Location add(BytesReference data)
                      throws IOException

add the given bytes to the translog and return the location they were written at

例外:

IOException

updateBufferSize

public void updateBufferSize(int bufferSize)
                      throws TranslogException

change the size of the internal buffer if relevant

例外:

TranslogException

sync

public void sync()
          throws IOException

write all buffered ops to disk and fsync file

例外:

IOException

syncNeeded

public boolean syncNeeded()

returns true if there are buffered ops

totalOperations

public int totalOperations()

定義:

totalOperations クラス内 TranslogReader

sizeInBytes

public long sizeInBytes()

定義:

sizeInBytes クラス内 TranslogReader

flush

protected void flush()
              throws IOException

Flushes the buffer if the translog is buffered.

例外:

IOException

newReaderFromWriter

public TranslogReader newReaderFromWriter()

returns a new reader that follows the current writes (most importantly allows making repeated snapshots that includes new content)

immutableReader

public ImmutableTranslogReader immutableReader()
                                        throws TranslogException

returns a new immutable reader which only exposes the current written operation *

例外:

TranslogException

syncUpTo

public boolean syncUpTo(long offset)
                 throws IOException

Syncs the translog up to at least the given offset unless already synced

戻り値:

true if this call caused an actual sync operation

例外:

IOException

readBytes

protected void readBytes(ByteBuffer buffer,
                         long position)
                  throws IOException

クラスからコピーされた説明: TranslogReader

reads bytes at position into the given buffer, filling it.

定義:

readBytes クラス内 TranslogReader

例外:

IOException

checkpoint

protected void checkpoint(long lastSyncPosition,
                          int operationCounter,
                          org.elasticsearch.index.translog.ChannelReference channelReference)
                   throws IOException

例外:

IOException

ensureOpen

protected final void ensureOpen()

オーバーライド:

ensureOpen クラス内 TranslogReader