Package org.apache.druid.java.util.common.io.smoosh

Class SmooshedFileMapper

java.lang.Object

org.apache.druid.java.util.common.io.smoosh.SmooshedFileMapper

All Implemented Interfaces:

Closeable, AutoCloseable, SegmentFileMapper

public class SmooshedFileMapper
extends Object
implements SegmentFileMapper

Class that works in conjunction with FileSmoosher. This class knows how to map in a set of files smooshed by the FileSmoosher.

Field Summary

Fields

Modifier and Type	Field	Description
static final com.google.common.collect.Interner<String>	STRING_INTERNER	Interner for smoosh internal files, which includes all column names since every column has an internal file associated with it

Method Summary

Modifier and Type	Method	Description
void	close()
Set<String>	getInternalFilenames()	Returns the list of files contained within in the segment file which can be retrieved with SegmentFileMapper.mapFile(String)
static SmooshedFileMapper	load(File baseDir)
ByteBuffer	mapFile(String name)	Returns a mapped ByteBuffer which of the contents of the internal file, or null if the file is not present in this segment.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.segment.file.SegmentFileMapper

mapExternalFile

Field Details

STRING_INTERNER

public static final com.google.common.collect.Interner<String> STRING_INTERNER

Interner for smoosh internal files, which includes all column names since every column has an internal file associated with it

Method Details

load

public static SmooshedFileMapper load(File baseDir)
                               throws IOException

Throws:

IOException

getInternalFilenames

public Set<String> getInternalFilenames()

Description copied from interface: SegmentFileMapper

Returns the list of files contained within in the segment file which can be retrieved with SegmentFileMapper.mapFile(String)

Specified by:

getInternalFilenames in interface SegmentFileMapper

mapFile

public ByteBuffer mapFile(String name)
                   throws IOException

Description copied from interface: SegmentFileMapper

Returns a mapped ByteBuffer which of the contents of the internal file, or null if the file is not present in this segment. The file data is from 0 to Buffer.capacity(), Buffer.limit() is equal to the capacity.

Specified by:

mapFile in interface SegmentFileMapper

Throws:

IOException

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface SegmentFileMapper