org.apache.cassandra.io.util

Class FileHandle.Builder

java.lang.Object

org.apache.cassandra.io.util.FileHandle.Builder

All Implemented Interfaces:

java.lang.AutoCloseable

Enclosing class:

FileHandle

public static class FileHandle.Builder
extends java.lang.Object
implements java.lang.AutoCloseable

Configures how the file will be read (compressed, mmapped, use cache etc.)

Constructor Summary

Constructors

Constructor and Description
Builder(ChannelProxy channel)
Builder(java.lang.String path)

Method Summary

Modifier and Type	Method and Description
FileHandle.Builder	bufferSize(int bufferSize) Set the buffer size to use (if appropriate).
FileHandle.Builder	bufferType(BufferType bufferType) Set the buffer type (on heap or off heap) to use (if appropriate).
void	close()
java.lang.Throwable	close(java.lang.Throwable accumulate)
FileHandle	complete() Complete building FileHandle without overriding file length.
FileHandle	complete(long overrideLength) Complete building FileHandle with the given length, which overrides the file length.
FileHandle.Builder	compressed(boolean compressed)
FileHandle.Builder	mmapped(boolean mmapped) Set whether to use mmap for reading
FileHandle.Builder	withChunkCache(ChunkCache chunkCache) Set ChunkCache to use.
FileHandle.Builder	withCompressionMetadata(CompressionMetadata metadata) Provide CompressionMetadata to use when reading compressed file.

Methods inherited from class java.lang.Object

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

Constructor Detail

Builder

public Builder(java.lang.String path)

Builder

public Builder(ChannelProxy channel)

Method Detail

compressed

public FileHandle.Builder compressed(boolean compressed)

withChunkCache

public FileHandle.Builder withChunkCache(ChunkCache chunkCache)

Set ChunkCache to use.

Parameters:

chunkCache - ChunkCache object to use for caching

Returns:

this object

withCompressionMetadata

public FileHandle.Builder withCompressionMetadata(CompressionMetadata metadata)

Provide CompressionMetadata to use when reading compressed file.

Parameters:

metadata - CompressionMetadata to use

Returns:

this object

mmapped

public FileHandle.Builder mmapped(boolean mmapped)

Set whether to use mmap for reading

Parameters:

mmapped - true if using mmap

Returns:

this instance

bufferSize

public FileHandle.Builder bufferSize(int bufferSize)

Set the buffer size to use (if appropriate).

Parameters:

bufferSize - Buffer size in bytes

Returns:

this instance

bufferType

public FileHandle.Builder bufferType(BufferType bufferType)

Set the buffer type (on heap or off heap) to use (if appropriate).

Parameters:

bufferType - Buffer type to use

Returns:

this instance

complete

public FileHandle complete()

Complete building FileHandle without overriding file length.

See Also:

complete(long)

complete

public FileHandle complete(long overrideLength)

Complete building FileHandle with the given length, which overrides the file length.

Parameters:

overrideLength - Override file length (in bytes) so that read cannot go further than this value. If the value is less than or equal to 0, then the value is ignored.

Returns:

Built file

close

public java.lang.Throwable close(java.lang.Throwable accumulate)

close

public void close()

Specified by:

close in interface java.lang.AutoCloseable