org.apache.cassandra.io.util

Class MmappedSegmentedFile

java.lang.Object

org.apache.cassandra.utils.concurrent.SharedCloseableImpl

org.apache.cassandra.io.util.SegmentedFile

org.apache.cassandra.io.util.MmappedSegmentedFile

All Implemented Interfaces:

java.lang.AutoCloseable, SharedCloseable

public class MmappedSegmentedFile
extends SegmentedFile

Field Summary

Fields

Modifier and Type	Field and Description
static long	MAX_SEGMENT_SIZE

Fields inherited from class org.apache.cassandra.io.util.SegmentedFile

length, onDiskLength, path

Constructor Summary

Constructors

Constructor and Description
MmappedSegmentedFile(java.lang.String path, long length, org.apache.cassandra.io.util.SegmentedFile.Segment[] segments)

Method Summary

Modifier and Type	Method and Description
FileDataInput	getSegment(long position)
MmappedSegmentedFile	sharedCopy()

Methods inherited from class org.apache.cassandra.io.util.SegmentedFile

createReader, createThrottledReader, dropPageCache, getBuilder, getCompressedBuilder, getCompressedBuilder, iterator, toString

Methods inherited from class org.apache.cassandra.utils.concurrent.SharedCloseableImpl

close, isCleanedUp

Methods inherited from class java.lang.Object

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

Field Detail

MAX_SEGMENT_SIZE

public static long MAX_SEGMENT_SIZE

Constructor Detail

MmappedSegmentedFile

public MmappedSegmentedFile(java.lang.String path,
                            long length,
                            org.apache.cassandra.io.util.SegmentedFile.Segment[] segments)

Method Detail

sharedCopy

public MmappedSegmentedFile sharedCopy()

Specified by:

sharedCopy in interface SharedCloseable

Specified by:

sharedCopy in class SegmentedFile

Returns:

a new instance of the object representing the same state and backed by the same underlying resources. Coordinates with the original (and other instances) when the underlying resource should be closed. Throws an exception if the shared resource has already been closed.

getSegment

public FileDataInput getSegment(long position)

Overrides:

getSegment in class SegmentedFile

Returns:

The segment containing the given position: must be closed after use.