net.metanotion.io
Interface BlockIO<K,D,T>

All Superinterfaces:

Closeable, Flushable

All Known Implementing Classes:

AppendBlockIO

public interface BlockIO<K,D,T>
extends Flushable, Closeable

Abstract definition of a "Block Input/Output" device. The generic type T is the type of a transaction handle returned. The generic type D is the type of the data handled by a block. The generic type K is the type of the key by which blocks are referenced. For example, a hard drive might be represented by: public class HardDrive implements BlockIO;

Method Summary

void	abort(T xid)
K	allocBlock()
K	allocBlock(T t)
T	begin()
T	begin(T parentXID)
void	close()
void	commit(T xid)
void	flush()
void	freeBlock(K block)
void	freeBlock(K block, T t)
BlockHandle<D>	getBlock(K block)
BlockHandle<D>	getBlock(K block, T t)
boolean	hasTransactions()

Method Detail

hasTransactions

boolean hasTransactions()

begin

T begin()
        throws UnsupportedOperationException

Throws:

UnsupportedOperationException

begin

T begin(T parentXID)
        throws UnsupportedOperationException

Throws:

UnsupportedOperationException

commit

void commit(T xid)
            throws UnsupportedOperationException

Throws:

UnsupportedOperationException

abort

void abort(T xid)
           throws UnsupportedOperationException

Throws:

UnsupportedOperationException

flush

void flush()

Specified by:

flush in interface Flushable

close

void close()

Specified by:

close in interface Closeable

allocBlock

K allocBlock()

allocBlock

K allocBlock(T t)

freeBlock

void freeBlock(K block)

freeBlock

void freeBlock(K block,
               T t)

getBlock

BlockHandle<D> getBlock(K block)

getBlock

BlockHandle<D> getBlock(K block,
                        T t)