node-red-contrib-azure-service-bus-message-receiver/receive-message-new.js

Receives queue messages from Azure Service Bus Queues

const { ServiceBusClient } = require("@azure/service-bus");

module.exports = function (RED) {
  function ReceiveMessageNew(config) {
    RED.nodes.createNode(this, config);

    const node = this;

    const created = new Date().toISOString();

    node.log("receive-message node created");

    const serviceBusClient = new ServiceBusClient(config.connectionString);

    const receiver = serviceBusClient.createReceiver(config.queue);

    node.on("close", async (done) => {
      node.log("Closing " + created + " - " + node.id);

      if (receiver) {
        await receiver.close();
      }

      done();
    });

    node.status({ fill: "green", shape: "dot", text: "connected" });

    const processMessageHandler = (message) => {
      node.status({ fill: "blue", shape: "ring", text: "got a message" });
      node.send({
        payload: message.body,
      });
    };

    const processErrorHandler = (error) => {
      if (error == "No messages to receive") {
        node.status({ fill: "green", shape: "dot", text: "connected" });
      } else {
        node.error(error);
        node.status({
          fill: "red",
          shape: "ring",
          text: "error, see debug or output",
        });
      }
    };

    receiver.subscribe({
      processMessage: processMessageHandler,
      processError: processErrorHandler,
    });
  }

  RED.nodes.registerType("receive-message-new", ReceiveMessageNew);
};