static TransportMessage TranslateToSqlTransportMessage(TransportMessage msmqMessage)
{
var headers = msmqMessage.Headers;
var msmqId = headers["NServiceBus.MessageId"];
var sqlId = msmqId;
// Set the Id to a deterministic guid, as Sql message Ids are Guids and
// Msmq message ids are guid\nnnn. Newer versions of NServiceBus already
// return just a guid for the messageId. So, check to see if the Id is
// a valid Guid and if not, only then create a valid Guid. This check
// is important as it affects the retries if the message is rolled back.
// If the Ids are different, then the recoverability won't know its the same message.
Guid msmqGuid;
if (!Guid.TryParse(msmqId, out msmqGuid))
{
sqlId = GuidBuilder.BuildDeterministicGuid(msmqId).ToString();
headers["NServiceBus.MessageId"] = sqlId;
}
return(new TransportMessage(sqlId, headers)
{
Body = msmqMessage.Body,
// MSMQ and SQL Server transports signal lack of TimeToBeReceived differently.
// MSMQ uses Message.InfiniteTimeout value to indicate that a message should
// never be discarded. SQL Server transport expects TimeSpan.MaxValue to
// indicate the same behaviour. This would normally be handled by NServiceBus
// pipeline when transforming a transport message into a logical message.
// This sample skips the pipeline and deals with transport messages directly,
// thus making this translation required.
TimeToBeReceived = (msmqMessage.TimeToBeReceived < Message.InfiniteTimeout) ? msmqMessage.TimeToBeReceived : TimeSpan.MaxValue
});
}
// Will get invoked, whenever a new event is published by the Msmq publishers
// and when they notify the bridge. The bridge is a MSMQ and the publishers
// have an entry for this queue in their subscription storage.
public bool Handle(TransportMessage message)
{
var headers = message.Headers;
Type[] eventTypes =
{
Type.GetType(headers["NServiceBus.EnclosedMessageTypes"])
};
var msmqId = headers["NServiceBus.MessageId"];
// Set the Id to a deterministic guid, as Sql message Ids are Guids and
// Msmq message ids are guid\nnnn. Newer versions of NServiceBus already
// return just a guid for the messageId. So, check to see if the Id is
// a valid Guid and if not, only then create a valid Guid. This check
// is important as it affects the retries if the message is rolled back.
// If the Ids are different, then the recoverability won't know its the same message.
Guid newGuid;
if (!Guid.TryParse(msmqId, out newGuid))
{
headers["NServiceBus.MessageId"] = GuidBuilder.BuildDeterministicGuid(msmqId).ToString();
}
log.Info("Forwarding message to all the SQL subscribers via a Publish");
publisher.Publish(message, new PublishOptions(eventTypes.First()));
return(true);
}
