protected internal virtual bool ProcessNextBatch(int batchCount, bool exitIfNoJobsAvailable)
{
try
{
bool waitForMessage = false;
bool loop = false;
do
{
// exit loop if we'll close the connection
if (WillClose())
{
break;
}
// do we have pending jobs or shall we wait for new jobs to
// arrive, which is required only for releasing stickiness
// condition to this thread
if (waitForMessage || !_queue.Empty)
{
_queue.drainTo(_batch, batchCount);
// if we expect one message but did not get any (because it was already
// processed), silently exit
if (_batch.Count == 0 && !exitIfNoJobsAvailable)
{
// loop until we get a new job, if we cannot then validate
// transaction to check for termination condition. We'll
// break loop if we'll close the connection
while (!WillClose())
{
Job nextJob = _queue.poll(10, SECONDS);
if (nextJob != null)
{
_batch.Add(nextJob);
break;
}
else
{
_machine.validateTransaction();
}
}
}
NotifyDrained(_batch);
// execute each job that's in the batch
while (_batch.Count > 0)
{
Job current = _batch.RemoveAt(0);
current.Perform(_machine);
}
// do we have any condition that require this connection to
// stick to the current thread (i.e. is there an open statement
// or an open transaction)?
loop = _machine.shouldStickOnThread();
waitForMessage = loop;
}
// we processed all pending messages, let's flush underlying channel
if (_queue.size() == 0)
{
_output.flush();
}
} while (loop);
// assert only if we'll stay alive
if (!WillClose())
{
Debug.Assert(!_machine.hasOpenStatement());
}
}
catch (BoltConnectionAuthFatality ex)
{
_shouldClose.set(true);
if (ex.Loggable)
{
_userLog.warn(ex.Message);
}
}
catch (BoltProtocolBreachFatality ex)
{
_shouldClose.set(true);
_log.error(string.Format("Protocol breach detected in bolt session '{0}'.", Id()), ex);
}
catch (InterruptedException)
{
_shouldClose.set(true);
_log.info("Bolt session '%s' is interrupted probably due to server shutdown.", Id());
}
catch (Exception t)
{
_shouldClose.set(true);
_userLog.error(string.Format("Unexpected error detected in bolt session '{0}'.", Id()), t);
}
finally
{
if (WillClose())
{
Close();
}
}
return(!_closed.get());
}