|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectcom.mckoi.store.ScatteringStoreDataAccessor
public class ScatteringStoreDataAccessor
An implementation of StoreDataAccessor that scatters the addressible data resource across multiple files in the file system. When one store data resource reaches a certain threshold size, the content 'flows' over to the next file.
Constructor Summary | |
---|---|
ScatteringStoreDataAccessor(java.io.File path,
java.lang.String file_name,
java.lang.String first_ext,
long max_slice_size)
Constructs the store data accessor. |
Method Summary | |
---|---|
void |
close()
Closes the underlying data area representation. |
void |
convertToScatteringStore(java.io.File f)
Given a file, this will convert to a scattering file store with files no larger than the maximum slice size. |
boolean |
delete()
Deletes the data area resource. |
boolean |
exists()
Returns true if the resource exists. |
long |
getSize()
Returns the current size of the underlying data area. |
void |
open(boolean read_only)
Opens the underlying data area representation. |
void |
read(long position,
byte[] buf,
int off,
int len)
Reads a block of data from the underlying data area at the given position into the byte array at the given offset. |
void |
setSize(long length)
Sets the size of the underlying data area to the given size. |
void |
synch()
Synchronizes the data area by forcing any data out of the OS buffers onto the disk. |
void |
write(long position,
byte[] buf,
int off,
int len)
Writes a block of data to the underlying data area from the byte array at the given offset. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
---|
public ScatteringStoreDataAccessor(java.io.File path, java.lang.String file_name, java.lang.String first_ext, long max_slice_size)
Method Detail |
---|
public void convertToScatteringStore(java.io.File f) throws java.io.IOException
java.io.IOException
public void open(boolean read_only) throws java.io.IOException
java.io.IOException
public void close() throws java.io.IOException
java.io.IOException
public boolean delete()
public boolean exists()
public void read(long position, byte[] buf, int off, int len) throws java.io.IOException
java.io.IOException
public void write(long position, byte[] buf, int off, int len) throws java.io.IOException
java.io.IOException
public void setSize(long length) throws java.io.IOException
java.io.IOException
public long getSize() throws java.io.IOException
java.io.IOException
public void synch() throws java.io.IOException
java.io.IOException
|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |