tasks/service/history/worker_versioning_util.go

// 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 history

import (
	"context"

	"go.temporal.io/api/serviceerror"
	persistencespb "go.temporal.io/server/api/persistence/v1"
	taskqueuespb "go.temporal.io/server/api/taskqueue/v1"
	"go.temporal.io/server/common"
	"go.temporal.io/server/common/log"
	"go.temporal.io/server/common/log/tag"
	"go.temporal.io/server/common/metrics"
	"go.temporal.io/server/common/persistence"
	"go.temporal.io/server/common/worker_versioning"
	"go.temporal.io/server/service/history/consts"
	"go.temporal.io/server/service/history/shard"
	"go.temporal.io/server/service/history/tasks"
	"go.temporal.io/server/service/history/workflow"
	"go.temporal.io/server/service/history/workflow/cache"
)

func updateIndependentActivityBuildId(
	ctx context.Context,
	task tasks.Task,
	buildId string,
	shardContext shard.Context,
	transactionPolicy workflow.TransactionPolicy,
	workflowCache cache.Cache,
	metricsHandler metrics.Handler,
	logger log.Logger,
) (retErr error) {
	if buildId == "" {
		// the task is sync-matched, or versioning is not enabled for this Task Queue
		return nil
	}

	defer func() {
		if retErr != nil {
			// An independent task is scheduled but we could not persist the assigned build ID in mutable state.
			// This is only an issue for user visibility: until the task is started user would not see the assigned
			// build ID.
			// Since it does not affect WF progress, just logging warn and skipping the error.
			// TODO: let the error bubble up so the task is rescheduled and build ID is fully updated
			logger.Warn("failed to update activity's assigned build ID", append(tasks.Tags(task), tag.Error(retErr))...)
		}
		retErr = nil
	}()

	// We should reach to this point only when all the following conditions are true:
	// - assignment rules are added for the Task Queue (i.e. worker versioning is enabled)
	// - sync-match did not happen for this task
	// - the activity is on a different task queue (or otherwise asked to be independently assigned to a build ID)
	weContext, release, err := getWorkflowExecutionContextForTask(ctx, shardContext, workflowCache, task)
	if err != nil {
		return err
	}

	defer func() {
		release(retErr)
	}()

	var mutableState workflow.MutableState
	var scheduledEventId int64
	var taskVersion int64

	switch t := task.(type) {
	case *tasks.ActivityTask:
		scheduledEventId = t.ScheduledEventID
		taskVersion = t.Version
		mutableState, err = loadMutableStateForTransferTask(ctx, shardContext, weContext, t, metricsHandler, logger)
	case *tasks.ActivityRetryTimerTask:
		scheduledEventId = t.EventID
		taskVersion = t.Version
		mutableState, err = loadMutableStateForTimerTask(ctx, shardContext, weContext, t, metricsHandler, logger)
	default:
		return serviceerror.NewInvalidArgument("task type not supported")
	}

	if err != nil {
		return err
	}

	if mutableState == nil {
		return consts.ErrWorkflowExecutionNotFound
	}

	ai, activityRunning := mutableState.GetActivityInfo(scheduledEventId)
	if !activityRunning {
		// We did not find the activity task, it means that it's already completed.
		return nil
	}

	err = CheckTaskVersion(shardContext, logger, mutableState.GetNamespaceEntry(), ai.Version, taskVersion, task)
	if err != nil {
		return err
	}

	ai.BuildIdInfo = &persistencespb.ActivityInfo_LastIndependentlyAssignedBuildId{LastIndependentlyAssignedBuildId: buildId}
	err = mutableState.UpdateActivity(ai)
	if err != nil {
		return err
	}

	return weContext.UpdateWorkflowExecutionWithNew(
		ctx,
		shardContext,
		persistence.UpdateWorkflowModeUpdateCurrent,
		nil,
		nil,
		transactionPolicy,
		nil,
	)
}

func updateWorkflowAssignedBuildId(
	ctx context.Context,
	transferTask *tasks.WorkflowTask,
	buildId string,
	shardContext shard.Context,
	transactionPolicy workflow.TransactionPolicy,
	workflowCache cache.Cache,
	metricsHandler metrics.Handler,
	logger log.Logger,
) (retErr error) {
	if buildId == "" {
		// the task is sync-matched, or versioning is not enabled for this Task Queue
		return nil
	}

	defer func() {
		if retErr != nil {
			// The first workflow task is scheduled but we could not persist the assigned build ID in mutable state.
			// This is only an issue for user visibility: until the task is started user would not see the assigned
			// build ID.
			// Since it does not affect WF progress, just logging warn and skipping the error.
			// TODO: let the error bubble up so the task is rescheduled and build ID is fully updated
			logger.Error("failed to update workflow's assigned build ID", append(tasks.Tags(transferTask), tag.Error(retErr))...)
		}
		retErr = nil
	}()

	// We should reach to this point only when all the following conditions are true:
	// - assignment rules are added for the Task Queue (i.e. worker versioning is enabled)
	// - sync-match did not happen for this task
	// - this is the first workflow task of the execution
	// - the workflow has not inherited a build ID (for child WF or CaN)
	weContext, release, err := getWorkflowExecutionContextForTask(ctx, shardContext, workflowCache, transferTask)
	if err != nil {
		return err
	}

	mutableState, err := loadMutableStateForTransferTask(ctx, shardContext, weContext, transferTask, metricsHandler, logger)
	if err != nil {
		release(err)
		return err
	}
	defer func() {
		release(retErr)
	}()

	if mutableState == nil {
		return consts.ErrWorkflowExecutionNotFound
	}

	workflowTask := mutableState.GetWorkflowTaskByID(transferTask.ScheduledEventID)
	if workflowTask == nil {
		return nil
	}
	err = CheckTaskVersion(shardContext, logger, mutableState.GetNamespaceEntry(), workflowTask.Version, transferTask.Version, transferTask)
	if err != nil {
		return err
	}

	workflowTaskStarted := mutableState.GetLastWorkflowTaskStartedEventID() != common.EmptyEventID

	if workflowTaskStarted {
		// this scheduled event is stale now, so don't write build ID here.
		// The build ID should be already updated via RecordWorkflowTaskStarted
		return nil
	}

	err = mutableState.UpdateBuildIdAssignment(buildId)
	if err != nil {
		return err
	}

	return weContext.UpdateWorkflowExecutionWithNew(
		ctx,
		shardContext,
		persistence.UpdateWorkflowModeUpdateCurrent,
		nil,
		nil,
		transactionPolicy,
		nil,
	)
}

func MakeDirectiveForWorkflowTask(ms workflow.MutableState) *taskqueuespb.TaskVersionDirective {
	return worker_versioning.MakeDirectiveForWorkflowTask(
		ms.GetInheritedBuildId(),
		ms.GetAssignedBuildId(),
		ms.GetMostRecentWorkerVersionStamp(),
		ms.GetLastWorkflowTaskStartedEventID(),
	)
}

func MakeDirectiveForActivityTask(mutableState workflow.MutableState, activityInfo *persistencespb.ActivityInfo) *taskqueuespb.TaskVersionDirective {
	if !activityInfo.UseCompatibleVersion && activityInfo.GetUseWorkflowBuildIdInfo() == nil {
		return worker_versioning.MakeUseAssignmentRulesDirective()
	} else if id := mutableState.GetAssignedBuildId(); id != "" {
		return worker_versioning.MakeBuildIdDirective(id)
	} else if id := worker_versioning.BuildIdIfUsingVersioning(mutableState.GetMostRecentWorkerVersionStamp()); id != "" {
		// TODO: old versioning only [cleanup-old-wv]
		return worker_versioning.MakeBuildIdDirective(id)
	}
	// else: unversioned execution
	return nil
}