public abstract class MappedBytes extends AbstractBytes<Void> implements net.openhft.chronicle.core.io.Closeable, net.openhft.chronicle.core.io.ManagedCloseable, net.openhft.chronicle.core.io.Syncable
Memory is grouped in chunks of 64 MB by default. The chunk size can be increased greatly if the OS.isSparseFileSupported() e.g. blockSize(512 << 30)
The chunk containing the most recent accessed memory is reserved and the previous chunk is released. For random access, you can reserve a chunk by obtaining the bytesStore() and using reserve(owner) on it, remembering to release(owner) the same BytesStore before closing the file.
NOTE These MappedBytes are single threaded as are all Bytes.
| Modifier and Type | Field and Description |
|---|---|
protected static boolean |
TRACE |
bytesStore, DISABLE_THREAD_SAFETY, isPresent, readPosition, writeLimit, writePositionreferenceCounted, WARN_COUNT, WARN_NSDEFAULT_BYTE_BUFFER_CAPACITY, MAX_CAPACITY, MAX_HEAP_CAPACITYcharToStringJAVA9_STRING_CODER_LATIN, JAVA9_STRING_CODER_UTF16| Modifier | Constructor and Description |
|---|---|
protected |
MappedBytes() |
protected |
MappedBytes(String name) |
| Modifier and Type | Method and Description |
|---|---|
abstract void |
chunkCount(long[] chunkCount) |
abstract MappedBytes |
disableThreadSafetyCheck(boolean disableThreadSafetyCheck)
Deprecated.
|
abstract boolean |
isBackingFileReadOnly() |
static @NotNull MappedBytes |
mappedBytes(@NotNull File file,
long chunkSize) |
static @NotNull MappedBytes |
mappedBytes(@NotNull File file,
long chunkSize,
long overlapSize) |
static @NotNull MappedBytes |
mappedBytes(@NotNull File file,
long chunkSize,
long overlapSize,
boolean readOnly) |
static @NotNull MappedBytes |
mappedBytes(@NotNull MappedFile rw) |
static @NotNull MappedBytes |
mappedBytes(@NotNull String filename,
long chunkSize) |
abstract MappedFile |
mappedFile() |
static @NotNull MappedBytes |
readOnly(@NotNull File file) |
boolean |
sharedMemory()
Returns if this Bytes object is using memory that can be shared across processes.
|
static @NotNull MappedBytes |
singleMappedBytes(@NotNull File file,
long capacity) |
static @NotNull MappedBytes |
singleMappedBytes(@NotNull File file,
long capacity,
boolean readOnly) |
static @NotNull MappedBytes |
singleMappedBytes(@NotNull String filename,
long capacity) |
void |
sync() |
acquireUncheckedInput, addressForRead, addressForWrite, addressForWritePosition, append, byteCheckSum, byteCheckSum, byteCheckSum, bytesStore, bytesStore, canReadDirect, canWriteDirect, capacity, clear, clearAndPad, compact, compareAndSwapInt, compareAndSwapLong, copy, equals, hashCode, isDirectMemory, isElastic, isImmutableEmptyByteStore, lastDecimalPlaces, lastDecimalPlaces, lastNumberHadDigits, lastNumberHadDigits, lenient, lenient, move, nativeRead, nativeWrite, peekUnsignedByte, peekUnsignedByte, performRelease, prewrite, prewrite, prewriteByte, prewriteInt, prewriteLong, prewriteOffsetPositionMoved, prewriteShort, read, read, readByte, readByte, readCheckOffset, readDouble, readDouble, readFloat, readFloat, readInt, readInt, readLimit, readLimit, readLong, readLong, readOffsetPositionMoved, readPosition, readPosition, readShort, readShort, readSkip, readUnsignedByte, readUnsignedByte, readVolatileByte, readVolatileInt, readVolatileInt, readVolatileLong, readVolatileLong, readVolatileShort, realCapacity, safeCopySize, start, startsWith, testAndSetInt, toString, uncheckedReadSkipBackOne, uncheckedReadSkipOne, uncheckedReadUnsignedByte, uncheckedWritePosition, underlyingObject, write, write, write, write, write, write8bit, write8bit, write8bit, write8bit, writeByte, writeByte, writeCheckOffset, writeDouble, writeDouble, writeDoubleAndInt, writeFloat, writeFloat, writeInt, writeInt, writeIntAdv, writeLimit, writeLimit, writeLong, writeLong, writeLongAdv, writeOffsetPositionMoved, writeOffsetPositionMoved, writeOrderedInt, writeOrderedInt, writeOrderedLong, writeOrderedLong, writePosition, writePosition, writeShort, writeShort, writeSkip, writeSome, writeVolatileByte, writeVolatileInt, writeVolatileLong, writeVolatileShortassertReferencesReleased, backgroundPerformRelease, canReleaseInBackground, clearUsedByThread, createdHere, disableReferenceTracing, enableReferenceTracing, refCount, referenceId, release, releaseLast, reserve, reservedBy, reserveTransfer, singleThreadedCheckDisabled, singleThreadedCheckReset, threadSafetyCheck, throwExceptionIfNotReleased, throwExceptionIfReleased, tryReserve, unmonitor, warnAndReleaseIfNotReleasedclone, finalize, getClass, notify, notifyAll, wait, wait, waitcreatedHere, throwExceptionIfClosed, warnAndCloseIfNotClosedclose, closeQuietly, closeQuietlyallocateDirect, allocateDirect, allocateElasticDirect, allocateElasticDirect, allocateElasticOnHeap, allocateElasticOnHeap, bytesForRead, copyTo, copyTo, directFrom, elasticByteBuffer, elasticByteBuffer, elasticByteBuffer, elasticHeapByteBuffer, elasticHeapByteBuffer, empty, ensureCapacity, forFieldGroup, from, from, fromDirect, fromHexString, indexOf, indexOf, isClear, isEqual, readBigDecimal, readBigInteger, readMarshallableLength16, readWithLength, readWrite, safeLimit, toHexString, toHexString, toHexString, toString, toString, toString, unchecked, unchecked, unwrite, valueOf, wrapForRead, wrapForRead, wrapForWrite, wrapForWrite, write, writeMarshallableLength16addAndGetDouble, addAndGetDoubleNotAtomic, addAndGetFloat, addAndGetFloatNotAtomic, addAndGetInt, addAndGetIntNotAtomic, addAndGetLong, addAndGetShortNotAtomic, addAndGetUnsignedByteNotAtomic, bytesForWrite, charAt, cipher, cipher, compareAndSwapDouble, compareAndSwapFloat, contentEquals, elasticByteBuffer, endsWith, equalBytes, forFields, from, hash, inside, inside, isEmpty, isEqual, lazyNativeBytesStoreWithFixedCapacity, length, nativePointer, nativeStore, nativeStoreFrom, nativeStoreWithFixedCapacity, startsWith, subSequence, to8bitString, toDebugString, toDebugString, wrap, wrap, wrap, writeMaxInt, writeMaxLong, zeroOutappend, append, write, write, writeBoolean, writeByte, writeInt24, writeOrderedDouble, writeOrderedFloat, writeUnsignedByte, writeUnsignedInt, writeUnsignedShort, writeUtf8, writeUtf8Limited, writeVolatileDouble, writeVolatileFloatchars, codePointsbytesMethodReader, bytesMethodReaderBuilder, readObjectcanReadDirect, compareUtf8, copyTo, copyTo, createCharToString, fastHash, findByte, parseLong, peekVolatileInt, printable, readBoolean, readIncompleteLong, readUnsignedInt, readUnsignedInt24, readUnsignedShort, readUtf8, readUtf8Limited, readUtf8Limited, readVolatileDouble, readVolatileFloat, subBytes, toByteArray, toTemporaryDirectByteBufferparse8bit, parse8bit, parse8bit, parse8bit, parse8bit, parseBigDecimal, parseBoolean, parseBoolean, parseDouble, parseFlexibleLong, parseFloat, parseInt, parseLong, parseLongDecimal, parseUtf8, parseUtf8, parseUtf8, reader, skipToinputStream, parseHexLong, parseUtf8, parseUtf8, rawReadByte, rawReadInt, rawReadLong, read, read, read, read, read, read8bit, read8bit, read8bit, readBoolean, readChar, readEnum, readHistogram, readIncompleteLong, readInt24, readLimitToCapacity, readPositionForHeader, readPositionRemaining, readPositionUnlimited, readStopBit, readStopBitChar, readStopBitDecimal, readStopBitDouble, readUnsignedInt, readUnsignedInt24, readUnsignedShort, readUtf8, readUtf8, readUtf8, readUtf8, readWithLength, readWithLength, readWithLength0, unsafeRead, unsafeReadObject, unsafeReadObjectbytesMethodWriter, writeObjectappend, append, append, append, append, append, append, append, append, append8bit, append8bit, append8bit, append8bit, append8bit, appendBase, appendBase16, appendBase16, appendDateMillis, appendDecimal, appendTimeMillis, writerappendUtf8, appendUtf8, appendUtf8, appendUtf8, appendUtf8, appendUtf8, copyFrom, outputStream, rawWriteByte, rawWriteInt, rawWriteLong, unsafeWrite, unsafeWriteObject, unsafeWriteObject, write, write, write, write, write, write, write8bit, write8bit, write8bit, writeBigDecimal, writeBigInteger, writeBoolean, writeChar, writeEnum, writeHistogram, writeInt24, writePositionForHeader, writePositionRemaining, writeSome, writeStopBit, writeStopBit, writeStopBit, writeStopBitDecimal, writeUnsignedByte, writeUnsignedInt, writeUnsignedInt24, writeUnsignedShort, writeUtf8, writeUtf8, writeWithLengthprependcomment, indent, retainsCommentsprotected MappedBytes()
throws IllegalStateException
IllegalStateExceptionprotected MappedBytes(String name) throws IllegalStateException
IllegalStateException@NotNull public static @NotNull MappedBytes singleMappedBytes(@NotNull @NotNull String filename, long capacity) throws FileNotFoundException, IllegalStateException
@NotNull public static @NotNull MappedBytes singleMappedBytes(@NotNull @NotNull File file, long capacity) throws FileNotFoundException, IllegalStateException
@NotNull public static @NotNull MappedBytes singleMappedBytes(@NotNull @NotNull File file, long capacity, boolean readOnly) throws FileNotFoundException, IllegalStateException
@NotNull public static @NotNull MappedBytes mappedBytes(@NotNull @NotNull String filename, long chunkSize) throws FileNotFoundException, IllegalStateException
@NotNull public static @NotNull MappedBytes mappedBytes(@NotNull @NotNull File file, long chunkSize) throws FileNotFoundException, IllegalStateException
@NotNull public static @NotNull MappedBytes mappedBytes(@NotNull @NotNull File file, long chunkSize, long overlapSize) throws FileNotFoundException, IllegalStateException
@NotNull public static @NotNull MappedBytes mappedBytes(@NotNull @NotNull File file, long chunkSize, long overlapSize, boolean readOnly) throws FileNotFoundException, IllegalStateException
@NotNull public static @NotNull MappedBytes mappedBytes(@NotNull @NotNull MappedFile rw) throws IllegalStateException
IllegalStateException@NotNull public static @NotNull MappedBytes readOnly(@NotNull @NotNull File file) throws FileNotFoundException
FileNotFoundExceptionpublic abstract boolean isBackingFileReadOnly()
public boolean sharedMemory()
BytesA Bytes object that is backed by a memory mapped file can be shared whereas a Bytes object that is backed by heap memory cannot be shared across processes.
sharedMemory in interface Bytes<Void>@Deprecated public abstract MappedBytes disableThreadSafetyCheck(boolean disableThreadSafetyCheck)
public abstract void chunkCount(long[] chunkCount)
public abstract MappedFile mappedFile()
public void sync()
sync in interface net.openhft.chronicle.core.io.SyncableCopyright © 2022. All rights reserved.