规则引擎

pkg/rule_engine/nodes/external_mqtt_node.go

@@ -0,0 +1,64 @@
+package nodes
+
+import (
+	"fmt"
+	"pandax/pkg/rule_engine/message"
+	"time"
+
+	mqtt "github.com/eclipse/paho.mqtt.golang"
+	"github.com/sirupsen/logrus"
+)
+
+type externalMqttNode struct {
+	bareNode
+	TopicPattern      string
+	Host              string
+	Port              string
+	ConnectTimeoutSec int
+	ClientId          string
+	CleanSession      bool
+	Ssl               bool
+	MqttCli           mqtt.Client
+}
+
+type externalMqttNodeFactory struct{}
+
+func (f externalMqttNodeFactory) Name() string     { return "ExternalMqttNode" }
+func (f externalMqttNodeFactory) Category() string { return NODE_CATEGORY_EXTERNAL }
+func (f externalMqttNodeFactory) Create(id string, meta Metadata) (Node, error) {
+	labels := []string{"Success", "Failure"}
+
+	node := &externalMqttNode{
+		bareNode: newBareNode(f.Name(), id, meta, labels),
+	}
+	broker := fmt.Sprintf("tcp://%s:%s", node.Host, node.Port)
+	opts := mqtt.NewClientOptions().AddBroker(broker)
+	opts.SetClientID(node.ClientId)
+	opts.SetCleanSession(node.CleanSession)
+	opts.SetConnectTimeout(time.Duration(node.ConnectTimeoutSec) * time.Second)
+	node.MqttCli = mqtt.NewClient(opts)
+
+	if token := node.MqttCli.Connect(); token.Wait() && token.Error() != nil {
+		logrus.WithError(token.Error())
+		return nil, token.Error()
+	}
+	return decodePath(meta, node)
+}
+
+func (n *externalMqttNode) Handle(msg message.Message) error {
+	logrus.Infof("%s handle message '%s'", n.Name(), msg.GetType())
+
+	successLabelNode := n.GetLinkedNode("Success")
+	failureLabelNode := n.GetLinkedNode("Failure")
+	topic := n.TopicPattern //need fix add msg.metadata in it
+	sendmqttmsg, err := msg.MarshalBinary()
+	if err != nil {
+		return nil
+	}
+	token := n.MqttCli.Publish(topic, 1, false, sendmqttmsg)
+	if token.Wait() && token.Error() != nil {
+		fmt.Println(token.Error())
+		return failureLabelNode.Handle(msg)
+	}
+	return successLabelNode.Handle(msg)
+}