public static synchronized void shutdown() {
for (OMMapBufferEntry entry : new ArrayList<OMMapBufferEntry>(bufferPoolLRU)) {
entry.close();
}
bufferPoolLRU.clear();
bufferPoolPerFile.clear();
totalMemory = 0;
}
/**
* Removes the file.
*
* @throws IOException
*/
public static synchronized void removeFile(final OFile file) throws IOException {
final List<OMMapBufferEntry> entries = bufferPoolPerFile.remove(file);
if (entries != null) {
for (OMMapBufferEntry entry : entries) {
bufferPoolLRU.remove(entry);
entry.close();
}
entries.clear();
}
}
/** Flushes away all the buffers of closed files. This frees the memory. */
public static synchronized void flush() {
OMMapBufferEntry entry;
for (Iterator<OMMapBufferEntry> it = bufferPoolLRU.iterator(); it.hasNext(); ) {
entry = it.next();
if (entry.file != null && entry.file.isClosed()) {
removeEntry(it, entry);
entry.close();
}
}
}
/** Frees the mmap entry from the memory */
private static boolean removeEntry(
final Iterator<OMMapBufferEntry> it, final OMMapBufferEntry entry) {
if (commitBuffer(entry)) {
// COMMITTED: REMOVE IT
it.remove();
final List<OMMapBufferEntry> file = bufferPoolPerFile.get(entry.file);
if (file != null) {
file.remove(entry);
if (file.isEmpty()) bufferPoolPerFile.remove(entry.file);
}
entry.buffer = null;
totalMemory -= entry.size;
return true;
}
return false;
}
