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

public class SmooshedFileMapper
extends Object
implements Closeable

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()
static SmooshedFileMapper	load(File baseDir)
ByteBuffer	mapFile(String name)	Returns a mapped buffer of the smooshed file with the given name.

Methods inherited from class java.lang.Object

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

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()

mapFile

public ByteBuffer mapFile(String name)
                   throws IOException

Returns a mapped buffer of the smooshed file with the given name. Buffer's contents from 0 to capacity() are the whole mapped file contents, limit() is equal to capacity().

Throws:

IOException

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable