| Field Summary |
|
| final protected static long | BIN_AREA_OFFSET
The offset into the file that the bin area starts. |
| final protected static int | BIN_ENTRIES
|
| final protected static long | DATA_AREA_OFFSET
The offset into the file that the data areas start. |
| final protected static long | FIXED_AREA_OFFSET
The offset into the file of the 64 byte fixed area. |
| final protected static int | MAGIC
The magic value. |
| protected long[] | free_bin_list
The free bin list contains 128 entries pointing to the first available
block in the bin. |
| final protected byte[] | header_buf
|
| protected boolean | read_only
True if this is read-only. |
| protected long | total_allocated_space
The total amount of allocated space within this store since the store
was openned. |
| protected long | wilderness_pointer
A pointer to the wilderness area (the last deleted area in the store),
or -1 if there is no wilderness area. |
| Method Summary |
|
| protected void | checkPointer(long pointer)
Checks the pointer is valid. |
| public synchronized void | close()
Closes the store. |
| protected void | coalescArea(long pointer, long size)
Coalesc one or more areas into a larger area. |
| public synchronized AreaWriter | createArea(long size)
|
| public synchronized void | deleteArea(long id)
|
| abstract protected long | endOfDataAreaPointer()
Returns a pointer to the end of the current data area. |
| protected long | expandDataArea(long minimum_size)
Expands the data area by at least the minimum size given. |
| public ArrayList | findAllocatedAreasNotIn(ArrayList list)
Scans the area list, and any areas that aren't deleted and aren't found
in the given ArrayList are returned as leaked areas. |
| public List | getAllAreas()
Returns a List of Long objects that contain a complete list of all areas
in the store. |
| public Area | getArea(long id)
|
| protected void | getAreaHeader(long pointer, long[] header)
Sets the 'header' array with information from the header of the given
pointer. |
| public InputStream | getAreaInputStream(long id)
|
| public MutableArea | getMutableArea(long id)
|
| protected long | getNextAreaHeader(long pointer, long[] header)
Sets the 'header' array with information from the next header to the
given pointer, and returns a pointer to the next area. |
| protected long | getPreviousAreaHeader(long pointer, long[] header)
Sets the 'header' array with information from the previous header to the
given pointer, and returns a pointer to the previous area. |
| abstract protected void | internalClose()
Internally closes the backing area. |
| abstract protected void | internalOpen(boolean read_only)
Internally opens the backing area. |
| protected static boolean | isValidBoundarySize(long size)
Returns true if the given area size is valid. |
| public boolean | lastCloseClean()
|
| public synchronized boolean | open()
Opens the data store. |
| public synchronized void | openScanAndFix(UserTerminal terminal)
Opens/scans the store looking for any errors with the layout. |
| protected void | readBins()
Reads the bins from the header information in the file. |
| abstract protected int | readByteArrayFrom(long position, byte[] buf, int off, int len)
Reads a byte array from the given position in the file. |
| abstract protected int | readByteFrom(long position)
Reads a byte from the given position in the file. |
| protected void | reboundArea(long pointer, long[] header, boolean write_headers)
Rebounds the given area with the given header information. |
| abstract protected void | setDataAreaSize(long length)
Sets the size of the data area. |
| protected void | splitArea(long pointer, long new_boundary)
Splits an area pointed to by 'pointer' at a new boundary point. |
| public synchronized void | statsScan(HashMap properties)
Performs an extensive lookup on all the tables in this store and sets a
number of properties in the given HashMap
(property name(String) -> property description(Object)). |
| public synchronized long | totalAllocatedSinceStart()
Returns the total allocated space since the file was openned. |
| protected void | writeAllBins()
Updates all bins to the data area header area. |
| protected void | writeBinIndex(int index)
Updates the given bin index to the data area header area. |
| abstract protected void | writeByteArrayTo(long position, byte[] buf, int off, int len)
Writes a byte array to the given position in the file. |
| abstract protected void | writeByteTo(long position, int b)
Writes a byte to the given position in the file. |
