public void deleteStream(String streamName) throws IOException {
if (raFile == null) {
throw new IOException("MultiFile closed");
}
for (DirectoryBlock block : directoryBlocks) {
Long offset = block.removeStream(streamName);
if (offset != null) {
block.write(raFile);
FileBlock file = new FileBlock(offset.longValue());
file.read(raFile);
FreeBlock free = new FreeBlock(offset.longValue());
free.write(raFile);
freeBlocks.add(free);
long next = file.getHeader().getNextBlock();
while (next != 0) {
file = new FileBlock(next);
file.read(raFile);
free = new FreeBlock(next);
free.write(raFile);
freeBlocks.add(free);
next = file.getHeader().getNextBlock();
}
break;
}
}
}
private long createStream(String streamName) throws IOException {
if (raFile == null) {
throw new IOException("MultiFile closed");
}
deleteStream(streamName);
FreeBlock free = (freeBlocks.isEmpty()) ? null : freeBlocks.remove(freeBlocks.size() - 1);
long offset;
if (free != null) {
offset = free.getOffset();
} else {
offset = raFile.length();
}
for (DirectoryBlock block : directoryBlocks) {
if (block.addStream(streamName, offset)) {
block.write(raFile);
return offset;
}
}
DirectoryBlock newBlock = new DirectoryBlock(offset);
newBlock.addStream(streamName, offset);
newBlock.write(raFile);
DirectoryBlock lastBlock = directoryBlocks.get(directoryBlocks.size() - 1);
lastBlock.setNextOffset(offset);
lastBlock.write(raFile);
directoryBlocks.add(newBlock);
return offset;
}
