change CaaS Function Type, add return value:interface{}

conn/kis_connector.go

@@ -50,12 +50,16 @@ func (conn *KisConnector) Init() error {
 }
 
 // Call 调用Connector 外挂存储逻辑的读写操作
-func (conn *KisConnector) Call(ctx context.Context, flow kis.Flow, args interface{}) error {
-	if err := kis.Pool().CallConnector(ctx, flow, conn, args); err != nil {
-		return err
+func (conn *KisConnector) Call(ctx context.Context, flow kis.Flow, args interface{}) (interface{}, error) {
+	var result interface{}
+	var err error
+
+	result, err = kis.Pool().CallConnector(ctx, flow, conn, args)
+	if err != nil {
+		return nil, err
 	}
 
-	return nil
+	return result, nil
 }
 
 func (conn *KisConnector) GetName() string {

kis/connector.go

@@ -9,7 +9,7 @@ type Connector interface {
 	// Init 初始化Connector所关联的存储引擎链接等
 	Init() error
 	// Call 调用Connector 外挂存储逻辑的读写操作
-	Call(ctx context.Context, flow Flow, args interface{}) error
+	Call(ctx context.Context, flow Flow, args interface{}) (interface{}, error)
 	// GetId 获取Connector的ID
 	GetId() string
 	// GetName 获取Connector的名称

kis/pool.go

@@ -212,7 +212,7 @@ func (pool *kisPool) CaaS(cname string, fname string, mode common.KisMode, c Caa
 }
 
 // CallConnector 调度 Connector
-func (pool *kisPool) CallConnector(ctx context.Context, flow Flow, conn Connector, args interface{}) error {
+func (pool *kisPool) CallConnector(ctx context.Context, flow Flow, conn Connector, args interface{}) (interface{}, error) {
 	pool.cLock.RLock() // 读锁
 	defer pool.cLock.RUnlock()
 	fn := flow.GetThisFunction()
@@ -225,7 +225,7 @@ func (pool *kisPool) CallConnector(ctx context.Context, flow Flow, conn Connecto
 
 	log.Logger().ErrorFX(ctx, "CName:%s FName:%s mode:%s Can not find in KisPool, Not Added.\n", conn.GetName(), fnConf.FName, mode)
 
-	return errors.New(fmt.Sprintf("CName:%s FName:%s mode:%s Can not find in KisPool, Not Added.", conn.GetName(), fnConf.FName, mode))
+	return nil, errors.New(fmt.Sprintf("CName:%s FName:%s mode:%s Can not find in KisPool, Not Added.", conn.GetName(), fnConf.FName, mode))
 }
 
 // GetFlows 得到全部的Flow

kis/router.go

@@ -34,7 +34,7 @@ type connInitRouter map[string]ConnInit
 	Connector Call
 */
 // CaaS Connector的存储读取业务实现
-type CaaS func(context.Context, Connector, Function, Flow, interface{}) error
+type CaaS func(context.Context, Connector, Function, Flow, interface{}) (interface{}, error)
 
 // connFuncRouter 通过FunctionName索引到CaaS回调存储业务的映射关系
 // key: Function Name

test/caas/caas_demo1.go

@@ -8,7 +8,7 @@ import (
 
 // type CaaS func(context.Context, Connector, Function, Flow, interface{}) error
 
-func CaasDemoHanler1(ctx context.Context, conn kis.Connector, fn kis.Function, flow kis.Flow, args interface{}) error {
+func CaasDemoHanler1(ctx context.Context, conn kis.Connector, fn kis.Function, flow kis.Flow, args interface{}) (interface{}, error) {
 	fmt.Printf("===> In CaasDemoHanler1: flowName: %s, cName:%s, fnName:%s, mode:%s\n",
 		flow.GetName(), conn.GetName(), fn.GetConfig().FName, fn.GetConfig().FMode)
 
@@ -16,5 +16,5 @@ func CaasDemoHanler1(ctx context.Context, conn kis.Connector, fn kis.Function, f
 
 	fmt.Printf("===> Call Connector CaasDemoHanler1, args from funciton: %s\n", args)
 
-	return nil
+	return nil, nil
 }

test/faas/faas_demo2.go

@@ -23,7 +23,7 @@ func FuncDemo2Handler(ctx context.Context, flow kis.Flow) error {
 			return err
 		}
 
-		if conn.Call(ctx, flow, row) != nil {
+		if _, err := conn.Call(ctx, flow, row); err != nil {
 			log.Logger().ErrorFX(ctx, "FuncDemo2Handler(): Call err = %s\n", err.Error())
 			return err
 		}