规则引擎

pkg/rule_engine/nodes/action_generator_node.go

@@ -0,0 +1,38 @@
+package nodes
+
+import (
+	"fmt"
+	"github.com/sirupsen/logrus"
+	"pandax/pkg/rule_engine/message"
+)
+
+type messageGeneratorNode struct {
+	bareNode
+	DetailBuilderScript string `json:"detail_builder_script" yaml:"detail_builder_script"`
+	FrequenceInSecond   int32  `json:"frequency" yaml:"frequency"`
+}
+
+type messageGeneratorNodeFactory struct{}
+
+func (f messageGeneratorNodeFactory) Name() string     { return "MessageGeneratorNode" }
+func (f messageGeneratorNodeFactory) Category() string { return NODE_CATEGORY_ACTION }
+
+func (f messageGeneratorNodeFactory) Create(id string, meta Metadata) (Node, error) {
+	labels := []string{"Created", "Updated"}
+	node := &messageGeneratorNode{
+		bareNode: newBareNode(f.Name(), id, meta, labels),
+	}
+	return decodePath(meta, node)
+}
+
+func (n *messageGeneratorNode) Handle(msg message.Message) error {
+	logrus.Infof("%s handle message '%s'", n.Name(), msg.GetType())
+
+	createdLabelNode := n.GetLinkedNode("Created")
+	updatedLabelNode := n.GetLinkedNode("Updated")
+	if createdLabelNode == nil || updatedLabelNode == nil {
+		return fmt.Errorf("no valid label linked node in %s", n.Name())
+	}
+
+	return nil
+}