public IList <Msg> Fetch(int batchSize, int maxWaitMillis)
{
DurationGtZeroRequired(maxWaitMillis, "Fetch");
IList <Msg> messages = new List <Msg>();
int batchLeft = batchSize;
Stopwatch sw = Stopwatch.StartNew();
Duration expires = Duration.OfMillis(
maxWaitMillis > ExpireLessMillis
? maxWaitMillis - ExpireLessMillis
: maxWaitMillis);
Pull(PullRequestOptions.Builder(batchLeft).WithExpiresIn(expires).Build());
try
{
// timeout > 0 process as many messages we can in that time period
// If we get a message that either manager handles, we try again, but
// with a shorter timeout based on what we already used up
int timeLeft = maxWaitMillis;
while (batchLeft > 0 && timeLeft > 0)
{
Msg msg = NextMessageImpl(timeLeft);
if (!AnyManaged(msg)) // not managed means JS Message
{
messages.Add(msg);
batchLeft--;
}
// try again while we have time
timeLeft = maxWaitMillis - (int)sw.ElapsedMilliseconds;
}
}
catch (NATSTimeoutException)
{
// regular timeout, just end
}
return(messages);
}
public void PullNoWait(int batchSize)
{
Pull(PullRequestOptions.Builder(batchSize).WithNoWait().Build());
}
public void PullNoWait(int batchSize, int expiresInMillis)
{
DurationGtZeroRequired(expiresInMillis, "NoWait Expires In");
Pull(PullRequestOptions.Builder(batchSize).WithNoWait().WithExpiresIn(expiresInMillis).Build());
}
public void Pull(int batchSize)
{
Pull(PullRequestOptions.Builder(batchSize).Build());
}