规则引擎

pkg/rule_engine/nodes/transform_script_node.go

@@ -0,0 +1,38 @@
+package nodes
+
+import (
+	"github.com/sirupsen/logrus"
+	"pandax/pkg/rule_engine/message"
+)
+
+type transformScriptNode struct {
+	bareNode
+	Script string `json:"script" yaml:"script"`
+}
+
+type transformScriptNodeFactory struct{}
+
+func (f transformScriptNodeFactory) Name() string     { return "TransformScriptNode" }
+func (f transformScriptNodeFactory) Category() string { return NODE_CATEGORY_TRANSFORM }
+
+func (f transformScriptNodeFactory) Create(id string, meta Metadata) (Node, error) {
+	labels := []string{"Success", "Failure"}
+	node := &transformScriptNode{
+		bareNode: newBareNode(f.Name(), id, meta, labels),
+	}
+	return decodePath(meta, node)
+}
+
+func (n *transformScriptNode) Handle(msg message.Message) error {
+	logrus.Infof("%s handle message '%s'", n.Name(), msg.GetType())
+
+	successLabelNode := n.GetLinkedNode("Success")
+	failureLabelNode := n.GetLinkedNode("Failure")
+
+	scriptEngine := NewScriptEngine()
+	newMessage, err := scriptEngine.ScriptOnMessage(msg, n.Script)
+	if err != nil {
+		return failureLabelNode.Handle(msg)
+	}
+	return successLabelNode.Handle(newMessage)
+}