@@ -107,5 +107,6 @@ type (
 		ConflictResolveWorkflowExecution(request *persistence.ConflictResolveWorkflowExecutionRequest) (*persistence.ConflictResolveWorkflowExecutionResponse, error)
 		AddTasks(request *persistence.AddTasksRequest) error
 		AppendHistoryEvents(request *persistence.AppendHistoryNodesRequest, namespaceID namespace.ID, execution commonpb.WorkflowExecution) (int, error)
+		DeleteWorkflowExecution(curRequest *persistence.DeleteCurrentWorkflowExecutionRequest, delRequest *persistence.DeleteWorkflowExecutionRequest) error
 	}
 )
// The MIT License
//
// Copyright (c) 2020 Temporal Technologies Inc.  All rights reserved.
//
// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package shard

import (
	"time"

	commonpb "go.temporal.io/api/common/v1"

	"go.temporal.io/server/common/clock"
	"go.temporal.io/server/common/cluster"
	"go.temporal.io/server/common/log"
	"go.temporal.io/server/common/metrics"
	"go.temporal.io/server/common/namespace"
	"go.temporal.io/server/common/persistence"
	"go.temporal.io/server/common/resource"
	"go.temporal.io/server/service/history/configs"
	"go.temporal.io/server/service/history/events"
)

//go:generate mockgen -copyright_file ../../../LICENSE -package $GOPACKAGE -source $GOFILE -destination context_mock.go

type (
	// Context represents a history engine shard
	Context interface {
		GetShardID() int32
		GetService() resource.Resource
		GetExecutionManager() persistence.ExecutionManager
		GetNamespaceRegistry() namespace.Registry
		GetClusterMetadata() cluster.Metadata
		GetConfig() *configs.Config
		GetEventsCache() events.Cache
		GetLogger() log.Logger
		GetThrottledLogger() log.Logger
		GetMetricsClient() metrics.Client
		GetTimeSource() clock.TimeSource

		GetEngine() (Engine, error)

		GenerateTransferTaskID() (int64, error)
		GenerateTransferTaskIDs(number int) ([]int64, error)

		GetTransferMaxReadLevel() int64
		UpdateTimerMaxReadLevel(cluster string) time.Time

		SetCurrentTime(cluster string, currentTime time.Time)
		GetCurrentTime(cluster string) time.Time
		GetLastUpdatedTime() time.Time
		GetTimerMaxReadLevel(cluster string) time.Time

		GetTransferAckLevel() int64
		UpdateTransferAckLevel(ackLevel int64) error
		GetTransferClusterAckLevel(cluster string) int64
		UpdateTransferClusterAckLevel(cluster string, ackLevel int64) error

		GetVisibilityAckLevel() int64
		UpdateVisibilityAckLevel(ackLevel int64) error

		GetReplicatorAckLevel() int64
		UpdateReplicatorAckLevel(ackLevel int64) error
		GetReplicatorDLQAckLevel(sourceCluster string) int64
		UpdateReplicatorDLQAckLevel(sourCluster string, ackLevel int64) error

		GetClusterReplicationLevel(cluster string) int64
		UpdateClusterReplicationLevel(cluster string, ackTaskID int64) error

		GetTimerAckLevel() time.Time
		UpdateTimerAckLevel(ackLevel time.Time) error
		GetTimerClusterAckLevel(cluster string) time.Time
		UpdateTimerClusterAckLevel(cluster string, ackLevel time.Time) error

		UpdateTransferFailoverLevel(failoverID string, level persistence.TransferFailoverLevel) error
		DeleteTransferFailoverLevel(failoverID string) error
		GetAllTransferFailoverLevels() map[string]persistence.TransferFailoverLevel

		UpdateTimerFailoverLevel(failoverID string, level persistence.TimerFailoverLevel) error
		DeleteTimerFailoverLevel(failoverID string) error
		GetAllTimerFailoverLevels() map[string]persistence.TimerFailoverLevel

		GetNamespaceNotificationVersion() int64
		UpdateNamespaceNotificationVersion(namespaceNotificationVersion int64) error

		CreateWorkflowExecution(request *persistence.CreateWorkflowExecutionRequest) (*persistence.CreateWorkflowExecutionResponse, error)
		UpdateWorkflowExecution(request *persistence.UpdateWorkflowExecutionRequest) (*persistence.UpdateWorkflowExecutionResponse, error)
		ConflictResolveWorkflowExecution(request *persistence.ConflictResolveWorkflowExecutionRequest) (*persistence.ConflictResolveWorkflowExecutionResponse, error)
		AddTasks(request *persistence.AddTasksRequest) error
		AppendHistoryEvents(request *persistence.AppendHistoryNodesRequest, namespaceID namespace.ID, execution commonpb.WorkflowExecution) (int, error)
	}
)

can you move `DeleteWorkflowExecution` before `AddTasks` ?