How to use servicebus topic sessions in azure functionapp using javascript

Question

I have an Azure Functionapp that processes some data and pushes that data into an Azure servicebus topic.

I require sessions to be enabled on my servicebus topic subscription. I cannot seem to find a way to set the session id when using the javascript functionapp API.

Here is a modified extract from my function app:

module.exports = function (context, streamInput) {
  context.bindings.outputSbMsg = [];
  context.bindings.logMessage = [];

  function push(response) {
      let message = {
          body: CrowdSourceDatum.encode(response).finish()
          , customProperties: {
              protoType: manifest.Type
              , version: manifest.Version
              , id: functionId
              , rootType: manifest.RootType
        }
        , brokerProperties: {
            SessionId: "1"
        }
    context.bindings.outputSbMsg.push(message);
  }

  .......... some magic happens here.

  push(crowdSourceDatum);
  context.done();
} 

But the sessionId does not seem to get set at all. Any idea on how its possible to enable this?

Answer 1

I tested sessionid on my function, I can set the session id property of a message and view it in Service Bus explorer. Here is my sample code.

var connectionString = 'servicebus_connectionstring';
var serviceBusService = azure.createServiceBusService(connectionString);

var message = {
    body: '',
    customProperties:
    {
        messagenumber: 0
    },
    brokerProperties:
    {
        SessionId: "1"
    }
};

message.body= 'This is Message #101';
serviceBusService.sendTopicMessage('testtopic', message, function(error)
{
    if (error)
    {
        console.log(error);
    }
});

Here is the test result.

Please make sure you have enabled the portioning and sessions when you created the topic and the subscription.