Package org.apache.accumulo.core.file.blockfile.impl

Class CachableBlockFile.Reader

java.lang.Object

org.apache.accumulo.core.file.blockfile.impl.CachableBlockFile.Reader

All Implemented Interfaces:

Closeable, AutoCloseable

Enclosing class:

CachableBlockFile

public static class CachableBlockFile.Reader
extends Object
implements Closeable

Class wraps the BCFile reader.

Constructor Summary

Constructors

Constructor	Description
Reader(CachableBlockFile.CachableBuilder b)

Method Summary

Modifier and Type	Method	Description
void	close()
CachableBlockFile.CachedBlockRead	getDataBlock(int blockIndex)	It is intended that once the BlockRead object is returned to the caller, that the caller will read the entire block and then call close on the BlockRead class.
CachableBlockFile.CachedBlockRead	getDataBlock(long offset, long compressedSize, long rawSize)
CachableBlockFile.CachedBlockRead	getMetaBlock(long offset, long compressedSize, long rawSize)
CachableBlockFile.CachedBlockRead	getMetaBlock(String blockName)	It is intended that once the BlockRead object is returned to the caller, that the caller will read the entire block and then call close on the BlockRead class.

Methods inherited from class java.lang.Object

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

Constructor Detail

Reader

public Reader(CachableBlockFile.CachableBuilder b)

Method Detail

getMetaBlock

public CachableBlockFile.CachedBlockRead getMetaBlock(String blockName)
                                               throws IOException

It is intended that once the BlockRead object is returned to the caller, that the caller will read the entire block and then call close on the BlockRead class.

Throws:

IOException

getMetaBlock

public CachableBlockFile.CachedBlockRead getMetaBlock(long offset,
                                                      long compressedSize,
                                                      long rawSize)
                                               throws IOException

Throws:

IOException

getDataBlock

public CachableBlockFile.CachedBlockRead getDataBlock(int blockIndex)
                                               throws IOException

It is intended that once the BlockRead object is returned to the caller, that the caller will read the entire block and then call close on the BlockRead class. NOTE: In the case of multi-read threads: This method can do redundant work where an entry is read from disk and other threads check the cache before it has been inserted.

Throws:

IOException

getDataBlock

public CachableBlockFile.CachedBlockRead getDataBlock(long offset,
                                                      long compressedSize,
                                                      long rawSize)
                                               throws IOException

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException