1st push

app/spawn_example.jl

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+using Revise      # remove when this package is completed
+using MQTTClient, GeneralUtils
+using Base.Threads
+
+# --------------------------------------- code width = 100 --------------------------------------- #
+
+
+
+
+
+
+
+function count_and_listen()
+    total_count = 0
+
+    # MQTT on-message function
+    function on_message(client::MQTTClient.MQTTClient, message::MQTTClient.MQTTMessage)
+        msg = String(message.payload)
+        println("Received MQTT message: $msg")
+        try
+            num = parse(Int, msg)
+            total_count += num
+        catch e
+            println("Error parsing message: $e")
+        end
+    end
+
+    # Connect to MQTT broker
+    client = MQTTClient.MQTTClient("client-1", "tcp://localhost:1883")
+    connect(client)
+    subscribe(client, "topic", on_message)
+
+    # Count from 1 to 1,000,000,000
+    for i in 1:1_000_000_000
+        total_count += i
+    end
+
+    # Disconnect from MQTT broker
+    unsubscribe(client, "topic")
+    disconnect(client)
+    
+    return total_count
+end
+
+# Spawn a process to run count_and_listen function
+task = @spawn count_and_listen()
+
+
+
+# Get the result
+result = fetch(task)
+
+# Stop the spawned task
+interrupt(task)
+
+
+
+
+
+
+
+
+
+
+
+
+
+using MQTTClient
+broker = "test.mosquitto.org"
+
+#Define the callback for receiving messages.
+function on_msg(topic, payload)
+    info("Received message topic: [", topic, "] payload: [", String(payload), "]")
+end
+
+#Instantiate a client and connection.
+client, connection = MakeConnection(broker, 1883)
+connect(client, connection)
+#Set retain to true so we can receive a message from the broker once we subscribe
+#to this topic.
+publish(client, "jlExample", "Hello World!", retain=true)
+#Subscribe to the topic we sent a retained message to.
+subscribe(client, "jlExample", on_msg, qos=QOS_1)
+#Unsubscribe from the topic
+unsubscribe(client, "jlExample")
+#Disconnect from the broker. Not strictly needed as the broker will also
+#disconnect us if the socket is closed. But this is considered good form
+#and needed if you want to resume this session later.
+disconnect(client)
+
+
+
+
+