void LogCache::DeleteOldRounds(uint64_t paxosID)
{
Cursor cursor;
ByteArray<128> buf;
DynArray<128> key;
DynArray<128> value;
Transaction* transaction;
transaction = RLOG->GetTransaction();
transaction->Begin();
WriteRoundID(buf, paxosID);
table->Iterate(transaction, cursor);
if (!cursor.Start(buf))
{
cursor.Close();
transaction->Rollback();
return;
}
while (cursor.Prev(key, value))
{
if (key.length > sizeof("@@pround:") - 1 &&
strncmp(key.buffer, "@@pround:", sizeof("@@pround:") - 1) == 0)
cursor.Delete();
else
break;
}
cursor.Close();
transaction->Commit();
}
void SingleKeyspaceDB::OnExpiryTimer()
{
uint64_t expiryTime;
Cursor cursor;
ByteString key;
Log_Trace();
table->Iterate(NULL, cursor);
kdata.Set("!!t:");
if (!cursor.Start(kdata))
ASSERT_FAIL();
cursor.Close();
if (kdata.length < 2)
ASSERT_FAIL();
if (kdata.buffer[0] != '!' || kdata.buffer[1] != '!')
ASSERT_FAIL();
ReadExpiryTime(kdata, expiryTime, key);
table->Delete(NULL, kdata);
table->Delete(NULL, key);
WriteExpiryKey(kdata, key);
table->Delete(NULL, kdata);
Log_Trace("Expiring key: %.*s", key.length, key.buffer);
InitExpiryTimer();
}
void SingleKeyspaceDB::InitExpiryTimer()
{
uint64_t expiryTime;
Cursor cursor;
ByteString key;
Log_Trace();
EventLoop::Remove(&expiryTimer);
table->Iterate(NULL, cursor);
kdata.Set("!!t:");
if (!cursor.Start(kdata))
return;
cursor.Close();
if (kdata.length < 2)
return;
if (kdata.buffer[0] != '!' || kdata.buffer[1] != '!')
return;
ReadExpiryTime(kdata, expiryTime, key);
expiryTimer.Set(expiryTime);
EventLoop::Add(&expiryTimer);
}
void ReplicatedKeyspaceDB::InitExpiryTimer()
{
uint64_t expiryTime;
Cursor cursor;
ByteString key;
Log_Trace();
EventLoop::Remove(&expiryTimer);
transaction = RLOG->GetTransaction();
if (!transaction->IsActive())
transaction->Begin();
table->Iterate(transaction, cursor);
kdata.Set("!!t:");
if (!cursor.Start(kdata))
{
cursor.Close();
return;
}
cursor.Close();
if (kdata.length < 2)
return;
if (kdata.buffer[0] != '!' || kdata.buffer[1] != '!')
return;
ReadExpiryTime(kdata, expiryTime, key);
Log_Trace("Setting expiry for %.*s at %" PRIu64 "", key.length, key.buffer, expiryTime);
expiryTimer.Set(expiryTime);
EventLoop::Add(&expiryTimer);
}
void ReplicatedKeyspaceDB::OnExpiryTimer()
{
assert(RLOG->IsMaster());
uint64_t expiryTime;
Cursor cursor;
ByteString key;
KeyspaceOp* op;
Log_Trace();
if (expiryAdded)
return;
transaction = RLOG->GetTransaction();
if (!transaction->IsActive())
transaction->Begin();
table->Iterate(transaction, cursor);
kdata.Set("!!t:");
if (!cursor.Start(kdata))
ASSERT_FAIL();
cursor.Close();
if (kdata.length < 2)
ASSERT_FAIL();
if (kdata.buffer[0] != '!' || kdata.buffer[1] != '!')
ASSERT_FAIL();
ReadExpiryTime(kdata, expiryTime, key);
op = new KeyspaceOp;
op->cmdID = 0;
op->type = KeyspaceOp::EXPIRE;
op->key.Allocate(key.length);
op->key.Set(key);
// expiryTime is set in Append()
op->service = NULL;
Add(op);
Submit();
}
