暂存一下,防止丢失

internal/application/approval/dispatch_decision.go

@@ -0,0 +1,85 @@
+package approval
+
+import (
+	"context"
+	"time"
+
+	"go.uber.org/zap"
+
+	"github.com/break/junhong_cmp_fiber/pkg/constants"
+	"github.com/break/junhong_cmp_fiber/pkg/errors"
+)
+
+// DecisionProcessingStore 管理标准决策交给业务消费者时的处理租约。
+type DecisionProcessingStore interface {
+	Claim(ctx context.Context, eventID string, owner string, now time.Time, duration time.Duration) (bool, error)
+	MarkSucceeded(ctx context.Context, eventID string, owner string, now time.Time) (bool, error)
+	MarkFailed(ctx context.Context, eventID string, owner string, now time.Time, errorSummary string) (bool, error)
+}
+
+// BusinessDecisionHandler 消费渠道无关标准决策。
+// 实现必须以审批实例 ID 和决策作为业务幂等键，并且不得依赖任何渠道 SDK、DTO 或状态码。
+type BusinessDecisionHandler interface {
+	Handle(ctx context.Context, event TerminalDecisionEvent) error
+}
+
+// DecisionDispatcher 使用处理租约把标准决策交给对应业务消费者。
+type DecisionDispatcher struct {
+	store    DecisionProcessingStore
+	handlers map[string]BusinessDecisionHandler
+	owner    string
+	logger   *zap.Logger
+	now      func() time.Time
+}
+
+// NewDecisionDispatcher 创建通用审批标准决策分发器。
+func NewDecisionDispatcher(
+	store DecisionProcessingStore,
+	handlers map[string]BusinessDecisionHandler,
+	owner string,
+	logger *zap.Logger,
+	now func() time.Time,
+) *DecisionDispatcher {
+	if logger == nil {
+		logger = zap.NewNop()
+	}
+	if now == nil {
+		now = time.Now
+	}
+	return &DecisionDispatcher{store: store, handlers: handlers, owner: owner, logger: logger, now: now}
+}
+
+// Consume 幂等消费一条标准决策；重复投递或其他有效租约正在处理时正常结束。
+func (d *DecisionDispatcher) Consume(ctx context.Context, event TerminalDecisionEvent) error {
+	if d == nil || d.store == nil || d.owner == "" || event.EventID == "" || event.InstanceID == 0 || event.BusinessType == "" {
+		return errors.New(errors.CodeInternalError, "通用审批决策分发器未完整配置")
+	}
+	handler := d.handlers[event.BusinessType]
+	if handler == nil {
+		return errors.New(errors.CodeServiceUnavailable, "审批业务消费者尚未注册")
+	}
+	now := d.now().UTC()
+	claimed, err := d.store.Claim(ctx, event.EventID, d.owner, now, constants.ApprovalDecisionDeliveryLeaseDuration)
+	if err != nil {
+		return err
+	}
+	if !claimed {
+		return nil
+	}
+	if err := handler.Handle(ctx, event); err != nil {
+		if _, markErr := d.store.MarkFailed(ctx, event.EventID, d.owner, d.now().UTC(), "业务消费者处理失败"); markErr != nil {
+			d.logger.Error("审批标准决策失败状态保存失败",
+				zap.String("event_id", event.EventID), zap.Uint("approval_instance_id", event.InstanceID),
+				zap.String("business_type", event.BusinessType), zap.Error(markErr))
+		}
+		return err
+	}
+	marked, err := d.store.MarkSucceeded(ctx, event.EventID, d.owner, d.now().UTC())
+	if err != nil {
+		return err
+	}
+	if !marked {
+		return errors.New(errors.CodeConflict, "审批标准决策处理租约已失效")
+	}
+	return nil
+}