public int PublishBatch(IDictionary <string, object> extraHeaders, IEnumerable <SimpleMessage> messages,
AndThenDeliveryMode mode)
{
var batch = _channel.CreateBasicPublishBatch();
int messageSentCounter = 0;
foreach (var message in messages)
{
var basicProperties = ToBasicProperties(_channel.CreateBasicProperties(), message);
ApplyHeaders(extraHeaders, basicProperties);
batch.Add(message.Exchange, message.RoutingKey ?? "", true, basicProperties, message.Body);
messageSentCounter++;
}
batch.Publish();
return(messageSentCounter);
}
public void PublishBatch(IReadOnlyList <SimpleMessage> messages, SimpleMessage andThen, AndThenDeliveryMode mode)
{
var groupId = Guid.NewGuid();
var headers = new Dictionary <string, object>
{
{ "MessageGroupId", groupId.ToByteArray() },
{ "AndThenMode", mode.ToString() }
};
//initialize the Redis List and Hash
if (mode != AndThenDeliveryMode.None)
{
_messageGroupHandler.StartMessageGroup(groupId);
}
var messageIds = InitializeMessageIds(messages);
//store message ids in the redis Redis List then
//set the MsgCount, Handled, DateStamp and the AndThen message
if (mode != AndThenDeliveryMode.None)
{
_messageGroupHandler.MessagesPrepared(groupId, messageIds);
_messageGroupHandler.SetMessageGroupCount(groupId, messageIds.Count, andThen);
}
_messagePublisher.PublishBatch(headers, messages, mode);
//finalize the redis structure by setting the Transmitted date stamp
if (mode != AndThenDeliveryMode.None)
{
_messageGroupHandler.CompleteMessageGroupTransmission(groupId);
}
if (andThen?.Body == null && mode == AndThenDeliveryMode.FromLastClient)
{
throw new Exception($"The AndThen body must be specified in the {AndThenDeliveryMode.FromLastClient} mode.");
}
if (andThen == null)
{
andThen = new SimpleMessage()
{
Exchange = "AndThen",
RoutingKey = messages.First().RoutingKey,
Body = System.Text.Json.JsonSerializer.SerializeToUtf8Bytes(messageIds)
};
}
else if (andThen?.Body == null)
{
andThen.Body = System.Text.Json.JsonSerializer.SerializeToUtf8Bytes(messageIds);
}
headers["MessagesSent"] = messageIds.Count;
switch (mode)
{
case AndThenDeliveryMode.FromLastClient:
//client will send the andThen message that it read from IMessageGroupHandler (redis).
break;
case AndThenDeliveryMode.FromEventService:
//client will send an event to the eventService after it handles each message.
_messagePublisher.Publish(headers, andThen);
break;
case AndThenDeliveryMode.FromPollingService:
//send the andThen message to the service that will now poll redis
_messagePublisher.Publish(headers, andThen);
break;
default:
throw new ArgumentOutOfRangeException(nameof(mode), mode, null);
}
}
public void PublishSingle(SimpleMessage message, SimpleMessage andThen, AndThenDeliveryMode mode)
{
PublishBatch(new[] { message }, andThen, mode);
}