tasks/host/query_workflow_test.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 host

import (
	"context"
	"sync"
	"sync/atomic"
	"time"

	commonpb "go.temporal.io/api/common/v1"
	sdkclient "go.temporal.io/sdk/client"
	"go.temporal.io/sdk/temporal"
	"go.temporal.io/sdk/worker"
	"go.temporal.io/sdk/workflow"
	"go.temporal.io/server/service/history/consts"

	"go.temporal.io/server/common/log/tag"
)

func (s *clientIntegrationSuite) TestQueryWorkflow_Sticky() {
	var replayCount int32
	workflowFn := func(ctx workflow.Context) (string, error) {
		// every replay will start from here
		atomic.AddInt32(&replayCount, 1)

		workflow.SetQueryHandler(ctx, "test", func() (string, error) {
			return "query works", nil
		})

		signalCh := workflow.GetSignalChannel(ctx, "test")
		var msg string
		signalCh.Receive(ctx, &msg)
		return msg, nil
	}

	s.worker.RegisterWorkflow(workflowFn)

	id := "test-query-sticky"
	workflowOptions := sdkclient.StartWorkflowOptions{
		ID:                 id,
		TaskQueue:          s.taskQueue,
		WorkflowRunTimeout: 20 * time.Second,
	}
	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()
	workflowRun, err := s.sdkClient.ExecuteWorkflow(ctx, workflowOptions, workflowFn)
	if err != nil {
		s.Logger.Fatal("Start workflow failed with err", tag.Error(err))
	}

	s.NotNil(workflowRun)
	s.True(workflowRun.GetRunID() != "")

	queryResult, err := s.sdkClient.QueryWorkflow(ctx, id, "", "test", "test")
	s.NoError(err)

	var queryResultStr string
	err = queryResult.Get(&queryResultStr)
	s.NoError(err)
	s.Equal("query works", queryResultStr)

	// verify query is handed by sticky worker (no replay)
	s.Equal(int32(1), replayCount)
}

func (s *clientIntegrationSuite) TestQueryWorkflow_Consistent_PiggybackQuery() {
	workflowFn := func(ctx workflow.Context) (string, error) {
		var receivedMsgs string
		workflow.SetQueryHandler(ctx, "test", func() (string, error) {
			return receivedMsgs, nil
		})

		signalCh := workflow.GetSignalChannel(ctx, "test")
		for {
			var msg string
			signalCh.Receive(ctx, &msg)
			receivedMsgs += msg
			if msg == "pause" {
				// block workflow task for 3s.
				workflow.ExecuteLocalActivity(ctx, func() {
					time.Sleep(time.Second * 3)
				}).Get(ctx, nil)
			}
		}

		return receivedMsgs, nil
	}

	s.worker.RegisterWorkflow(workflowFn)

	id := "test-query-consistent"
	workflowOptions := sdkclient.StartWorkflowOptions{
		ID:                 id,
		TaskQueue:          s.taskQueue,
		WorkflowRunTimeout: 20 * time.Second,
	}
	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()
	workflowRun, err := s.sdkClient.ExecuteWorkflow(ctx, workflowOptions, workflowFn)
	if err != nil {
		s.Logger.Fatal("Start workflow failed with err", tag.Error(err))
	}

	s.NotNil(workflowRun)
	s.True(workflowRun.GetRunID() != "")

	err = s.sdkClient.SignalWorkflow(ctx, id, "", "test", "pause")
	s.NoError(err)

	err = s.sdkClient.SignalWorkflow(ctx, id, "", "test", "abc")
	s.NoError(err)

	queryResult, err := s.sdkClient.QueryWorkflow(ctx, id, "", "test")
	s.NoError(err)

	var queryResultStr string
	err = queryResult.Get(&queryResultStr)
	s.NoError(err)

	// verify query sees all signals before it
	s.Equal("pauseabc", queryResultStr)
}

func (s *clientIntegrationSuite) TestQueryWorkflow_QueryWhileBackoff() {
	workflowFn := func(ctx workflow.Context) (string, error) {
		workflow.SetQueryHandler(ctx, "test", func() (string, error) {
			return "should-reach-here", nil
		})
		return "", temporal.NewApplicationError("retry-me", "test-error")
	}

	s.worker.RegisterWorkflow(workflowFn)

	id := "test-query-before-backoff"
	workflowOptions := sdkclient.StartWorkflowOptions{
		ID:                 id,
		TaskQueue:          s.taskQueue,
		WorkflowRunTimeout: 20 * time.Second,
		RetryPolicy: &temporal.RetryPolicy{
			InitialInterval: 10 * time.Second,
		},
	}
	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()
	workflowRun, err := s.sdkClient.ExecuteWorkflow(ctx, workflowOptions, workflowFn)
	if err != nil {
		s.Logger.Fatal("Start workflow failed with err", tag.Error(err))
	}

	s.NotNil(workflowRun)
	s.True(workflowRun.GetRunID() != "")

	// wait until retry with backoff is scheduled
	findBackoffWorkflow := false
	for i := 0; i < 5; i++ {
		historyEvents := s.getHistory(s.namespace, &commonpb.WorkflowExecution{
			WorkflowId: id,
		})
		s.True(len(historyEvents) > 0)
		startEvent := historyEvents[0]
		startAttributes := startEvent.GetWorkflowExecutionStartedEventAttributes()
		s.NotNil(startAttributes)
		if startAttributes.FirstWorkflowTaskBackoff != nil && *startAttributes.FirstWorkflowTaskBackoff > 0 {
			findBackoffWorkflow = true
			break
		}
		// wait for the retry, which will have backoff
		time.Sleep(time.Second)
	}
	s.True(findBackoffWorkflow)

	_, err = s.sdkClient.QueryWorkflow(ctx, id, "", "test")
	s.Error(err)
	s.ErrorContains(err, consts.ErrWorkflowTaskNotScheduled.Error())
}

func (s *clientIntegrationSuite) TestQueryWorkflow_QueryBeforeStart() {
	// stop the worker, so the workflow won't be started before query
	s.worker.Stop()

	workflowFn := func(ctx workflow.Context) (string, error) {
		status := "initialized"
		workflow.SetQueryHandler(ctx, "test", func() (string, error) {
			return status, nil
		})

		status = "started"
		workflow.Sleep(ctx, time.Hour)
		return "", nil
	}

	id := "test-query-before-start"
	workflowOptions := sdkclient.StartWorkflowOptions{
		ID:                 id,
		TaskQueue:          s.taskQueue,
		WorkflowRunTimeout: 20 * time.Second,
	}
	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()
	workflowRun, err := s.sdkClient.ExecuteWorkflow(ctx, workflowOptions, workflowFn)
	if err != nil {
		s.Logger.Fatal("Start workflow failed with err", tag.Error(err))
	}

	s.NotNil(workflowRun)
	s.True(workflowRun.GetRunID() != "")

	wg := sync.WaitGroup{}
	wg.Add(1)
	go func() {
		defer wg.Done()

		startTime := time.Now()
		queryResult, err := s.sdkClient.QueryWorkflow(ctx, id, "", "test")
		endTime := time.Now()
		s.NoError(err)
		var queryResultStr string
		err = queryResult.Get(&queryResultStr)
		s.NoError(err)

		// verify query sees all signals before it
		s.Equal("started", queryResultStr)

		s.True(endTime.Sub(startTime) > time.Second)
	}()

	// delay 2s to start worker, this will block query for 2s
	time.Sleep(time.Second * 2)
	s.worker = worker.New(s.sdkClient, s.taskQueue, worker.Options{})
	s.worker.RegisterWorkflow(workflowFn)
	if err := s.worker.Start(); err != nil {
		s.Logger.Fatal("Error when start worker", tag.Error(err))
	}

	// wait query
	wg.Wait()
}