synchronized void save() {
Long lastKey = this.lastSyncKey;
Set<Entry<Long, RedoLogValue>> entrySet =
lastKey == null ? skipListMap.entrySet() : skipListMap.tailMap(lastKey, false).entrySet();
if (!entrySet.isEmpty()) {
WriteBuffer buff = WriteBufferPool.poll();
try {
for (Entry<Long, RedoLogValue> e : entrySet) {
lastKey = e.getKey();
keyType.write(buff, lastKey);
valueType.write(buff, e.getValue());
}
int chunkLength = buff.position();
if (chunkLength > 0) {
buff.limit(chunkLength);
buff.position(0);
fileStorage.writeFully(pos, buff.getBuffer());
pos += chunkLength;
fileStorage.sync();
}
this.lastSyncKey = lastKey;
} finally {
WriteBufferPool.offer(buff);
}
}
}
