private long[] GetLatestUid()
{
// Perform this under a lock. This lock is also active for block queries
// and administration updates.
lock (blockDbWriteLock) {
// Create a transaction
ITransaction transaction = blockDatabase.CreateTransaction();
try {
// Create the UIDList object,
IDataFile uidListDf = transaction.GetFile(UidListKey, FileAccess.ReadWrite);
UidList uidList = new UidList(uidListDf);
return uidList.GetLastUid();
} finally {
blockDatabase.Dispose(transaction);
}
}
}
private void InternalFetchLogBundle(MessageStream replyMessage, long[] uid, bool initial)
{
// Perform this under a lock. This lock is also active for block queries
// and administration updates.
lock (blockDbWriteLock) {
// Create a transaction
ITransaction transaction = blockDatabase.CreateTransaction();
try {
// Create the UIDList object,
IDataFile uidListDf = transaction.GetFile(UidListKey, FileAccess.ReadWrite);
UidList uidList = new UidList(uidListDf);
// Go to the position of the uid,
long pos = 0;
if (uid != null) {
pos = uidList.PositionOfUid(uid);
}
long end = Math.Min(pos + 32, uidList.Count);
if (pos < 0) {
pos = -(pos + 1);
}
// If initial is true, we go back a bit
if (initial) {
// Go back 16 entries in the log (but don't go back before the first)
pos = Math.Max(0, (pos - 16));
} else {
// Go to the next entry,
pos = pos + 1;
}
// Send the bundle out to the stream,
for (long i = pos; i < end; ++i) {
long[] inUid = uidList.GetUid(i);
byte[] buf = GetValueFromUid(transaction, inUid);
replyMessage.AddMessage(new Message(inUid, buf));
}
} finally {
blockDatabase.Dispose(transaction);
}
}
}
private static void InsertToUidList(ITransaction t, long[] uid)
{
// Create the UIDList object,
IDataFile uidListDf = t.GetFile(UidListKey, FileAccess.ReadWrite);
UidList uidList = new UidList(uidListDf);
// Inserts the uid in the list
uidList.AddUid(uid);
}
