Package org.apache.cassandra.io.util

Interface Summary

Interface	Description
BytesReadTracker
CheckedFunction<T,R,E extends java.lang.Exception>
ChunkReader	RandomFileReader component that reads data from a file into a provided buffer and may have requirements over the size and alignment of reads.
DataInputPlus	Extension to DataInput that provides support for reading varints
DataOutputPlus	Extension to DataOutput that provides for writing ByteBuffer and Memory, potentially with an efficient implementation that is zero copy or at least has reduced bounds checking overhead.
DataPosition
DiskOptimizationStrategy
FileDataInput
PathUtils.IOConsumer
PathUtils.IOToLongFunction<V>
ReadableMemory
ReaderFileProxy	Base class for the RandomAccessReader components that implement reading.
Rebufferer	Rebufferer for reading data by a RandomAccessReader.
Rebufferer.BufferHolder
RebuffererFactory	Interface for the classes that can be used to instantiate rebufferers over a given file.
RewindableDataInput

Class Summary

Class	Description
AbstractReaderFileProxy
BufferedDataOutputStreamPlus	An implementation of the DataOutputStreamPlus interface using a ByteBuffer to stage writes before flushing them to an underlying channel.
BufferManagingRebufferer	Buffer manager used for reading from a ChunkReader when cache is not in use.
BufferManagingRebufferer.Aligned
BufferManagingRebufferer.Unaligned
ChannelProxy	A proxy of a FileChannel that: - implements reference counting - exports only thread safe FileChannel operations - wraps IO exceptions into runtime exceptions Tested by RandomAccessReaderTest.
ChecksummedRandomAccessReader
ChecksummedSequentialWriter
ChecksumWriter
CompressedChunkReader
CompressedChunkReader.Mmap
CompressedChunkReader.Standard
DataInputBuffer	Input stream around a single ByteBuffer.
DataInputPlus.DataInputStreamPlus	Wrapper around an InputStream that provides no buffering but can decode varints
DataIntegrityMetadata
DataIntegrityMetadata.ChecksumValidator
DataIntegrityMetadata.FileDigestValidator
DataOutputBuffer	An implementation of the DataOutputStream interface using a FastByteArrayOutputStream and exposing its buffer so copies can be avoided.
DataOutputBufferFixed	An implementation of the DataOutputStream interface using a FastByteArrayOutputStream and exposing its buffer so copies can be avoided.
DataOutputStreamPlus	Abstract base class for DataOutputStreams that accept writes from ByteBuffer or Memory and also provide access to the underlying WritableByteChannel associated with their output stream.
EmptyRebufferer
File	A thin wrapper around java.nio.file.Path to provide more ergonomic functionality.
FileHandle	FileHandle provides access to a file for reading, including the ones written by various SequentialWriter instances, and it is typically used by SSTableReader.
FileHandle.Builder	Configures how the file will be read (compressed, mmapped, use cache etc.)
FileInputStreamPlus
FileOutputStreamPlus
FileReader
FileSegmentInputStream	This is the same as DataInputBuffer, i.e.
FileStoreUtils
FileUtils
FileWriter
LengthAvailableInputStream	a FilterInputStream that returns the remaining bytes to read from available() regardless of whether the device is ready to provide them.
LimitingRebufferer	Rebufferer wrapper that applies rate limiting.
Memory	An off-heap region of memory that must be manually free'd when no longer needed.
MemoryInputStream
MemoryOutputStream	This class provides a way to stream the writes into the Memory
MmappedRegions
MmappedRegions.Region
MmappedRegions.Tidier
MmappedRegionsCache	It is a utility class for caching MmappedRegions primarily used by a FileHandle.Builder when a handle to the same file is created multiple times (as when an sstable is opened early).
NIODataInputStream	Rough equivalent of BufferedInputStream and DataInputStream wrapping the input stream of a File or Socket Created to work around the fact that when BIS + DIS delegate to NIO for socket IO they will allocate large thread local direct byte buffers when a large array is used to read.
PageAware
PathUtils	Vernacular: tryX means return false or 0L on any failure; XIfNotY means propagate any exceptions besides those caused by Y This class tries to apply uniform IOException handling, and does not propagate IOException except for NoSuchFileException.
RandomAccessReader
RebufferingInputStream	Rough equivalent of BufferedInputStream and DataInputStream wrapping a ByteBuffer that can be refilled via rebuffer.
SafeMemory
SafeMemoryWriter
SequentialWriter	Adds buffering, mark, and fsyncing to OutputStream.
SequentialWriter.BufferedFileWriterMark	Class to hold a mark to the position of the file
SequentialWriterOption	SequentialWriter option
SequentialWriterOption.Builder
SimpleCachedBufferPool	A very simple Bytebuffer pool with a fixed allocation size and a cached max allocation count.
SizedInts	Utility class for sizing, writing and reading ints with length stored separately.
SpinningDiskOptimizationStrategy
SsdDiskOptimizationStrategy
TailOverridingRebufferer	Special rebufferer that replaces the tail of the file (from the specified cutoff point) with the given buffer.
TeeDataInputPlus	DataInput that also stores the raw inputs into an output buffer This is useful for storing serialized buffers as they are deserialized.
ThreadLocalByteBufferHolder	Utility class that allow buffers to be reused by storing them in a thread local instance.
TrackedDataInputPlus	This class is to track bytes read from given DataInput
TrackedInputStream	This class is to track bytes read from given DataInputStream
UnbufferedDataOutputStreamPlus	Base class for DataOutput implementations that does not have an optimized implementations of Plus methods and does no buffering.
WrappedDataOutputStreamPlus	When possible use WrappedDataOutputStreamPlus instead of this class, as it will be more efficient when using Plus methods.
WrappingRebufferer	Instantiated once per RandomAccessReader, thread-unsafe.

Enum Summary

Enum	Description
File.WriteMode

Exception Summary

Exception	Description
CorruptFileException