feat: automatic injection parameters

kis/faas.go

@@ -0,0 +1,82 @@
+package kis
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"runtime"
+)
+
+// FaaS Function as a Service
+// type FaaS func(context.Context, *kisflow, ...interface{}) error
+// 这是一个方法类型，会在注入时在方法内判断
+type FaaS interface{}
+
+type FaaSDesc struct {
+	FnName    string
+	f         interface{}
+	fName     string
+	ArgsType  []reflect.Type
+	ArgNum    int
+	FuncType  reflect.Type
+	FuncValue reflect.Value
+	FaasSerialize
+}
+
+var globalFaaSSerialize = &DefaultFaasSerialize{}
+
+func NewFaaSDesc(fnName string, f FaaS) (*FaaSDesc, error) {
+	funcValue := reflect.ValueOf(f)
+	funcType := funcValue.Type()
+
+	if err := validateFuncType(funcType, funcValue); err != nil {
+		return nil, err
+	}
+
+	argsType := make([]reflect.Type, funcType.NumIn())
+	fullName := runtime.FuncForPC(funcValue.Pointer()).Name()
+	containsKisflowCtx := false
+
+	for i := 0; i < funcType.NumIn(); i++ {
+		paramType := funcType.In(i)
+		fmt.Println(paramType.Kind(), isFlowType(paramType))
+		if isFlowType(paramType) {
+			containsKisflowCtx = true
+		}
+		argsType[i] = paramType
+	}
+
+	if !containsKisflowCtx {
+		return nil, errors.New("function parameters must have Kisflow context")
+	}
+
+	if funcType.NumOut() != 1 || funcType.Out(0) != reflect.TypeOf((*error)(nil)).Elem() {
+		return nil, errors.New("function must have exactly one return value of type error")
+	}
+
+	// Check if f implements FaasSerialize interface
+	var serializeImpl FaasSerialize
+	if ser, ok := f.(FaasSerialize); ok {
+		serializeImpl = ser
+	} else {
+		serializeImpl = globalFaaSSerialize // Use global default implementation
+	}
+
+	return &FaaSDesc{
+		FnName:        fnName,
+		f:             f,
+		fName:         fullName,
+		ArgsType:      argsType,
+		ArgNum:        len(argsType),
+		FuncType:      funcType,
+		FuncValue:     funcValue,
+		FaasSerialize: serializeImpl,
+	}, nil
+}
+
+func validateFuncType(funcType reflect.Type, funcValue reflect.Value) error {
+	if funcType.Kind() != reflect.Func {
+		return fmt.Errorf("provided FaaS type is %s, not a function", funcType.Name())
+	}
+	return nil
+}

kis/flow.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"kis-flow/common"
 	"kis-flow/config"
+	"reflect"
 	"time"
 )
 
@@ -49,3 +50,9 @@ type Flow interface {
 	// Fork 得到Flow的一个副本(深拷贝)
 	Fork(ctx context.Context) Flow
 }
+
+var flowInterfaceType = reflect.TypeOf((*Flow)(nil)).Elem()
+
+func isFlowType(paramType reflect.Type) bool {
+	return paramType.Implements(flowInterfaceType)
+}

kis/pool.go

@@ -6,12 +6,13 @@ import (
 	"fmt"
 	"kis-flow/common"
 	"kis-flow/log"
+	"reflect"
 	"sync"
 )
 
 var _poolOnce sync.Once
 
-//  kisPool 用于管理全部的Function和Flow配置的池子
+// kisPool 用于管理全部的Function和Flow配置的池子
 type kisPool struct {
 	fnRouter funcRouter   // 全部的Function管理路由
 	fnLock   sync.RWMutex // fnRouter 锁
@@ -76,11 +77,17 @@ func (pool *kisPool) GetFlow(name string) Flow {
 
 // FaaS 注册 Function 计算业务逻辑, 通过Function Name 索引及注册
 func (pool *kisPool) FaaS(fnName string, f FaaS) {
+
+	faaSDesc, err := NewFaaSDesc(fnName, f)
+	if err != nil {
+		panic(err)
+	}
+
 	pool.fnLock.Lock() // 写锁
 	defer pool.fnLock.Unlock()
 
 	if _, ok := pool.fnRouter[fnName]; !ok {
-		pool.fnRouter[fnName] = f
+		pool.fnRouter[fnName] = faaSDesc
 	} else {
 		errString := fmt.Sprintf("KisPoll FaaS Repeat FuncName=%s", fnName)
 		panic(errString)
@@ -91,11 +98,37 @@ func (pool *kisPool) FaaS(fnName string, f FaaS) {
 
 // CallFunction 调度 Function
 func (pool *kisPool) CallFunction(ctx context.Context, fnName string, flow Flow) error {
+	if funcDesc, ok := pool.fnRouter[fnName]; ok {
+		params := make([]reflect.Value, 0, funcDesc.ArgNum)
+
+		for _, argType := range funcDesc.ArgsType {
+			if isFlowType(argType) {
+				params = append(params, reflect.ValueOf(flow))
+				continue
+			}
+			if isContextType(argType) {
+				params = append(params, reflect.ValueOf(ctx))
+				continue
+			}
+			if argType.Kind() == reflect.Slice {
+				value, err := funcDesc.FaasSerialize.DecodeParam(flow.Input(), argType)
+				if err != nil {
+					return err
+				}
+				params = append(params, value)
+				continue
+			}
+			params = append(params, reflect.Zero(argType))
+		}
+
+		retValues := funcDesc.FuncValue.Call(params)
+		ret := retValues[0].Interface()
+		if ret == nil {
+			return nil
+		}
+		return retValues[0].Interface().(error)
 
-	if f, ok := pool.fnRouter[fnName]; ok {
-		return f(ctx, flow)
 	}
-
 	log.Logger().ErrorFX(ctx, "FuncName: %s Can not find in KisPool, Not Added.\n", fnName)
 
 	return errors.New("FuncName: " + fnName + " Can not find in NsPool, Not Added.")

kis/router.go

@@ -8,13 +8,10 @@ import (
 /*
 	Function Call
 */
-// FaaS Function as a Service
-type FaaS func(context.Context, Flow) error
-
 // funcRouter
 // key: Function Name
-// value: Function 回调自定义业务
-type funcRouter map[string]FaaS
+// value: FaaSDesc 回调自定义业务的描述
+type funcRouter map[string]*FaaSDesc
 
 // flowRouter
 // key: Flow Name
@@ -28,7 +25,7 @@ type flowRouter map[string]Flow
 type ConnInit func(conn Connector) error
 
 // connInitRouter
-//key:
+// key:
 type connInitRouter map[string]ConnInit
 
 /*

kis/serialize.go

@@ -0,0 +1,11 @@
+package kis
+
+import (
+	"kis-flow/common"
+	"reflect"
+)
+
+type FaasSerialize interface {
+	DecodeParam(common.KisRowArr, reflect.Type) (reflect.Value, error)
+	EncodeParam(interface{}) (common.KisRowArr, error)
+}

kis/serialize_json.go

@@ -0,0 +1,110 @@
+package kis
+
+import (
+	"encoding/json"
+	"fmt"
+	"kis-flow/common"
+	"reflect"
+)
+
+type DefaultFaasSerialize struct {
+}
+
+func (f DefaultFaasSerialize) DecodeParam(arr common.KisRowArr, r reflect.Type) (reflect.Value, error) {
+	// 确保传入的类型是一个切片
+	if r.Kind() != reflect.Slice {
+		return reflect.Value{}, fmt.Errorf("r must be a slice")
+	}
+
+	slice := reflect.MakeSlice(r, 0, len(arr))
+
+	for _, row := range arr {
+		var elem reflect.Value
+		var err error
+
+		// 先尝试断言为结构体或指针
+		elem, err = decodeStruct(row, r.Elem())
+		if err != nil {
+			// 如果失败，则尝试直接反序列化为字符串
+			elem, err = decodeString(row)
+			if err != nil {
+				fmt.Println("---+++-", row)
+				// 如果还失败，则尝试先序列化为 JSON 再反序列化
+				elem, err = decodeJSON(row, r.Elem())
+				if err != nil {
+					return reflect.Value{}, fmt.Errorf("failed to decode row: %v", err)
+				}
+			}
+		}
+
+		slice = reflect.Append(slice, elem)
+	}
+
+	return slice, nil
+}
+
+// 尝试断言为结构体或指针
+func decodeStruct(row common.KisRow, elemType reflect.Type) (reflect.Value, error) {
+	elem := reflect.New(elemType).Elem()
+
+	// 如果元素是一个结构体或指针类型，则尝试断言
+	if structElem, ok := row.(reflect.Value); ok && structElem.Type().AssignableTo(elemType) {
+		elem.Set(structElem)
+		return elem, nil
+	}
+
+	return reflect.Value{}, fmt.Errorf("not a struct or pointer")
+}
+
+// 尝试直接反序列化字符串
+func decodeString(row common.KisRow) (reflect.Value, error) {
+	if str, ok := row.(string); ok {
+		var intValue int
+		if _, err := fmt.Sscanf(str, "%d", &intValue); err == nil {
+			return reflect.ValueOf(intValue), nil
+		}
+	}
+
+	return reflect.Value{}, fmt.Errorf("not a string")
+}
+
+// 尝试先序列化为 JSON 再反序列化
+func decodeJSON(row common.KisRow, elemType reflect.Type) (reflect.Value, error) {
+	jsonBytes, err := json.Marshal(row)
+	if err != nil {
+		return reflect.Value{}, fmt.Errorf("failed to marshal row to JSON: %v", err)
+	}
+
+	elem := reflect.New(elemType).Interface()
+	if err := json.Unmarshal(jsonBytes, elem); err != nil {
+		return reflect.Value{}, fmt.Errorf("failed to unmarshal JSON to element: %v", err)
+	}
+
+	return reflect.ValueOf(elem).Elem(), nil
+}
+
+func (f DefaultFaasSerialize) EncodeParam(i interface{}) (common.KisRowArr, error) {
+	var arr common.KisRowArr
+
+	switch reflect.TypeOf(i).Kind() {
+	case reflect.Slice, reflect.Array:
+		slice := reflect.ValueOf(i)
+		for i := 0; i < slice.Len(); i++ {
+			// 序列化每个元素为 JSON 字符串，并将其添加到切片中。
+			jsonBytes, err := json.Marshal(slice.Index(i).Interface())
+			if err != nil {
+				return nil, fmt.Errorf("failed to marshal element to JSON: %v", err)
+			}
+			arr = append(arr, string(jsonBytes))
+		}
+	default:
+		// 如果不是切片或数组类型，则直接序列化整个结构体为 JSON 字符串。
+		jsonBytes, err := json.Marshal(i)
+		if err != nil {
+			return nil, fmt.Errorf("failed to marshal element to JSON: %v", err)
+		}
+		arr = append(arr, string(jsonBytes))
+	}
+
+	return arr, nil
+}

kis/utils.go

@@ -0,0 +1,11 @@
+:package kis
+
+import (
+	"reflect"
+	"strings"
+)
+
+func isContextType(paramType reflect.Type) bool {
+	typeName := paramType.Name()
+	return strings.Contains(typeName, "Context")
+}