C# KafkaTriggerAttribute and KafkaAttribute should accept strings for Protocol and AuthenticationMode #161
Description
C# requires that attribute arguments must be a constant expression, typeof expression, or array creation expression of an attribute parameter type, which makes putting the Protocol and AuthenticationMode arguments for both KafkaTriggerAttribute and KafkaAttribute in to *.settings.json files impossible.
In code you can do something like:
BrokerProtocol protocol = (BrokerProtocol)Enum.Parse(typeof(BrokerProtocol), @"%Sec_Protocol%");but, that doesn't work for Attribute arguments.
It would be fantastic if KafkaTriggerAttribute and KafkaAttribute added string attribute versions of Protocol and AuthenticationMode that internally do the Enum.Parse() so that these values can be populated as:
[KafkaTrigger(@"%Broker%",
@"%TopicName%",
SslCaLocation = @"%CaFile%",
Protocol = @"%Protocol%", // <-----
AuthenticationMode = @"%AuthMode%", // <-----
Username = @"%Username%",
Password = @"%Password%",
ConsumerGroup = "%ConsumerGroup%" )] KafkaEventData<byte[]>[] events,instead of hardcoded like:
[KafkaTrigger(@"%Broker%",
@"%TopicName%",
SslCaLocation = @"%CaFile%",
Protocol = BrokerProtocol.SaslSsl, // <-----
AuthenticationMode = BrokerAuthenticationMode.Plain, // <-----
Username = @"%Username%",
Password = @"%Password%",
ConsumerGroup = "%ConsumerGroup%" )] KafkaEventData<byte[]>[] events,