@Override
public void load(Chunk chunk) throws IOException {
File regionDirectory = getRegionDirectory(chunk.world, chunk.x, chunk.z);
File f = new File(regionDirectory, chunk.x + "_" + chunk.z);
// if no file exists, just initialize a small-capacity map
if (!f.exists()) {
log.debug("load on chunk {}, no file exists, initializing empty dataset", chunk);
chunk.map = new IntShortOpenHashMap(100);
return;
}
DataInputStream is = null;
try {
is = new DataInputStream(new BufferedInputStream(new FileInputStream(f)));
// first 32 bits represent the size of the map
int available = is.readInt();
// we round up by 30% to account for .75 load factor in hash.
// this initializes the map at less than the load factor with
// some extra room for growth before needing a clone & grow
chunk.map = new IntShortOpenHashMap((int) (available * 1.3));
while (is.available() > 0) {
int key = is.readInt();
short value = is.readShort();
chunk.map.put(key, value);
if (log.isDebugEnabled()) {
Formatter format = new Formatter();
format.format("loaded chunk{%d,%d} owner %d for key %x", chunk.x, chunk.z, value, key);
log.debug(format.toString());
format.close();
}
}
} finally {
if (is != null) is.close();
}
}
