// PrioritizeWorkUnits changes the priorities of some number of work
// units.  The actual work units are in options["work_unit_keys"].  A
// higher priority results in the work units being scheduled sooner.
func (jobs *JobServer) PrioritizeWorkUnits(workSpecName string, options map[string]interface{}) (bool, string, error) {
	var (
		err      error
		query    coordinate.WorkUnitQuery
		workSpec coordinate.WorkSpec
	)
	pwuOptions := PrioritizeWorkUnitsOptions{
		Priority:   math.NaN(),
		Adjustment: math.NaN(),
	}
	workSpec, err = jobs.Namespace.WorkSpec(workSpecName)
	if err == nil {
		err = decode(&pwuOptions, options)
	}
	if err == nil && pwuOptions.WorkUnitKeys == nil {
		return false, "missing work_unit_keys", err
	}
	if err == nil {
		query.Names = pwuOptions.WorkUnitKeys
		if !math.IsNaN(pwuOptions.Priority) {
			err = workSpec.SetWorkUnitPriorities(query, pwuOptions.Priority)
		} else if !math.IsNaN(pwuOptions.Adjustment) {
			err = workSpec.AdjustWorkUnitPriorities(query, pwuOptions.Adjustment)
		}
	}
	return err == nil, "", err
}

// WorkUnit creates a work unit in the named work spec; if it fails,
// fail the test.
func (a *CacheAssertions) WorkUnit(workSpec coordinate.WorkSpec, name string) coordinate.WorkUnit {
	workUnit, err := workSpec.AddWorkUnit(name, map[string]interface{}{}, coordinate.WorkUnitMeta{})
	if !a.NoError(err, "error creating work unit") {
		a.FailNow("cannot create work unit")
	}
	return workUnit
}

// TestSpecCreateDestroy performs basic work spec lifetime tests.
func TestSpecCreateDestroy(t *testing.T) {
	var (
		dict  map[string]interface{}
		spec  coordinate.WorkSpec
		name  string
		names []string
		err   error
	)

	sts := SimpleTestSetup{
		NamespaceName: "TestSpecCreateDestroy",
	}
	sts.SetUp(t)
	defer sts.TearDown(t)
	name = "spec"

	spec, err = sts.Namespace.WorkSpec(name)
	assert.Equal(t, coordinate.ErrNoSuchWorkSpec{Name: name}, err)

	names, err = sts.Namespace.WorkSpecNames()
	if assert.NoError(t, err) {
		assert.Len(t, names, 0)
	}

	dict = map[string]interface{}{
		"name":   name,
		"min_gb": 0.1,
	}
	spec, err = sts.Namespace.SetWorkSpec(dict)
	if assert.NoError(t, err) && assert.NotNil(t, spec) {
		assert.Equal(t, name, spec.Name())
	}

	spec, err = sts.Namespace.WorkSpec(name)
	if assert.NoError(t, err) && assert.NotNil(t, spec) {
		assert.Equal(t, name, spec.Name())
	}

	DataMatches(t, spec, dict)

	names, err = sts.Namespace.WorkSpecNames()
	if assert.NoError(t, err) {
		assert.Equal(t, []string{name}, names)
	}

	err = sts.Namespace.DestroyWorkSpec(name)
	assert.NoError(t, err)

	spec, err = sts.Namespace.WorkSpec(name)
	assert.Equal(t, coordinate.ErrNoSuchWorkSpec{Name: name}, err)

	names, err = sts.Namespace.WorkSpecNames()
	if assert.NoError(t, err) {
		assert.Len(t, names, 0)
	}

	err = sts.Namespace.DestroyWorkSpec(name)
	assert.Equal(t, coordinate.ErrNoSuchWorkSpec{Name: name}, err)
}

func (api *restAPI) fillWorkUnitShort(namespace coordinate.Namespace, spec coordinate.WorkSpec, name string, short *restdata.WorkUnitShort) error {
	short.Name = name
	return buildURLs(api.Router,
		"namespace", namespace.Name(),
		"spec", spec.Name(),
		"unit", name,
	).URL(&short.URL, "workUnit").Error
}

// ControlWorkSpec makes changes to a work spec that are not directly
// reflected in the work spec definition.  This allows work specs to
// be paused or to stop generating new continuous jobs.
// ControlWorkSpecOptions has a complete listing of what can be done.
func (jobs *JobServer) ControlWorkSpec(workSpecName string, options map[string]interface{}) (bool, string, error) {
	var (
		cwsOptions ControlWorkSpecOptions
		decoder    *mapstructure.Decoder
		err        error
		metadata   mapstructure.Metadata
		workSpec   coordinate.WorkSpec
		wsMeta     coordinate.WorkSpecMeta
	)

	workSpec, err = jobs.Namespace.WorkSpec(workSpecName)
	if err == nil {
		// We care a lot about "false" vs. not present for
		// these things.  Manually create the decoder.
		config := mapstructure.DecoderConfig{
			Result:   &cwsOptions,
			Metadata: &metadata,
		}
		decoder, err = mapstructure.NewDecoder(&config)
	}
	if err == nil {
		err = decoder.Decode(options)
	}

	// Get the existing metadata, then change it based on what
	// we got provided
	if err == nil {
		wsMeta, err = workSpec.Meta(false)
	}
	if err == nil {
		for _, key := range metadata.Keys {
			switch key {
			case "Continuous":
				wsMeta.Continuous = cwsOptions.Continuous
			case "Status":
				wsMeta.Paused = cwsOptions.Status == Paused
			case "Weight":
				wsMeta.Weight = cwsOptions.Weight
			case "Interval":
				wsMeta.Interval = time.Duration(cwsOptions.Interval) * time.Second
			case "MaxRunning":
				wsMeta.MaxRunning = cwsOptions.MaxRunning
			}
		}
	}
	if err == nil {
		err = workSpec.SetMeta(wsMeta)
	}
	return err == nil, "", err
}

func getWorkSpecData(spec coordinate.WorkSpec) (map[string]interface{}, error) {
	data, err := spec.Data()
	if err != nil {
		return nil, err
	}
	byteify := func(key string) {
		value, present := data[key]
		if !present {
			return
		}
		string, ok := value.(string)
		if !ok {
			return
		}
		data[key] = []byte(string)
	}
	byteify("module")
	byteify("run_function")
	return data, nil
}

// TestChainingMixed uses a combination of strings and tuples in its
// "output" data.
func TestChainingMixed(t *testing.T) {
	var (
		one, two coordinate.WorkSpec
		attempt  coordinate.Attempt
		units    map[string]coordinate.WorkUnit
		err      error
	)

	sts := SimpleTestSetup{
		NamespaceName: "TestChainingMixed",
		WorkerName:    "worker",
	}
	sts.SetUp(t)
	defer sts.TearDown(t)

	one, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name": "one",
		"then": "two",
	})
	if !assert.NoError(t, err) {
		return
	}

	two, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name": "two",
	})
	if !assert.NoError(t, err) {
		return
	}

	_, err = one.AddWorkUnit("a", map[string]interface{}{}, coordinate.WorkUnitMeta{})
	assert.NoError(t, err)

	sts.WorkSpec = one
	attempt = sts.RequestOneAttempt(t)
	err = attempt.Finish(map[string]interface{}{
		"output": []interface{}{
			"key",
			cborrpc.PythonTuple{Items: []interface{}{
				"key",
				map[string]interface{}{
					"data": "x",
				},
				map[string]interface{}{
					"priority": 10.0,
				},
			}},
		},
	})
	assert.NoError(t, err)

	units, err = two.WorkUnits(coordinate.WorkUnitQuery{})
	if assert.NoError(t, err) {
		if assert.Contains(t, units, "key") {
			DataMatches(t, units["key"], map[string]interface{}{"data": "x"})
			UnitHasPriority(t, units["key"], 10.0)
		}
	}
}

// TestChainingExpiry tests that, if an attempt finishes but is no
// longer the active attempt, then its successor work units will not
// be created.
func TestChainingExpiry(t *testing.T) {
	var (
		one, two coordinate.WorkSpec
		err      error
		unit     coordinate.WorkUnit
	)

	sts := SimpleTestSetup{
		NamespaceName: "TestChainingExpiry",
		WorkerName:    "worker",
	}
	sts.SetUp(t)
	defer sts.TearDown(t)

	one, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name": "one",
		"then": "two",
	})
	if !assert.NoError(t, err) {
		return
	}
	sts.WorkSpec = one

	two, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name":     "two",
		"disabled": true,
	})
	if !assert.NoError(t, err) {
		return
	}

	// Create and perform a work unit, with no output
	unit, err = one.AddWorkUnit("a", map[string]interface{}{}, coordinate.WorkUnitMeta{})
	if !assert.NoError(t, err) {
		return
	}

	attempt := sts.RequestOneAttempt(t)

	// But wait!  We got preempted
	err = unit.ClearActiveAttempt()
	assert.NoError(t, err)
	sts.RequestOneAttempt(t)

	// Now, let the original attempt finish, trying to generate
	// more outputs
	err = attempt.Finish(map[string]interface{}{
		"output": []string{"unit"},
	})
	assert.NoError(t, err)

	// Since attempt is no longer active, this shouldn't generate
	// new outputs
	units, err := two.WorkUnits(coordinate.WorkUnitQuery{})
	if assert.NoError(t, err) {
		assert.Empty(t, units)
	}
}

func (api *restAPI) fillWorkUnit(namespace coordinate.Namespace, spec coordinate.WorkSpec, unit coordinate.WorkUnit, repr *restdata.WorkUnit) error {
	err := api.fillWorkUnitShort(namespace, spec, unit.Name(), &repr.WorkUnitShort)
	if err == nil {
		repr.Data, err = unit.Data()
	}
	if err == nil {
		var meta coordinate.WorkUnitMeta
		meta, err = unit.Meta()
		repr.Meta = &meta
	}
	if err == nil {
		repr.Status, err = unit.Status()
	}
	if err == nil {
		err = buildURLs(api.Router,
			"namespace", namespace.Name(),
			"spec", spec.Name(),
			"unit", unit.Name(),
		).
			URL(&repr.WorkSpecURL, "workSpec").
			URL(&repr.AttemptsURL, "workUnitAttempts").
			Error
	}
	if err == nil {
		var attempt coordinate.Attempt
		attempt, err = unit.ActiveAttempt()
		if err == nil && attempt != nil {
			// This is cheating, a little, but it's probably
			// the easiest way to reuse this code
			var short restdata.AttemptShort
			err = api.fillAttemptShort(namespace, attempt, &short)
			if err == nil {
				repr.ActiveAttemptURL = short.URL
			}
		}
	}
	return err
}

// GetWorkSpecMeta returns a set of control options for a given work
// spec.  The returned map has the full set of keys that
// ControlWorkSpec() will accept.
func (jobs *JobServer) GetWorkSpecMeta(workSpecName string) (result map[string]interface{}, _ string, err error) {
	var (
		workSpec coordinate.WorkSpec
		meta     coordinate.WorkSpecMeta
	)

	workSpec, err = jobs.Namespace.WorkSpec(workSpecName)
	if err == nil {
		meta, err = workSpec.Meta(false)
	}
	if err == nil {
		result = make(map[string]interface{})
		if meta.Paused {
			result["status"] = Paused
		} else {
			result["status"] = Runnable
		}
		result["continuous"] = meta.Continuous
		result["interval"] = meta.Interval.Seconds()
		result["max_running"] = meta.MaxRunning
		result["weight"] = meta.Weight
	}
	return
}

// TestMetaContinuous specifically checks that you cannot enable the
// "continuous" flag on non-continuous work specs.
func TestMetaContinuous(t *testing.T) {
	var (
		err       error
		namespace coordinate.Namespace
		spec      coordinate.WorkSpec
		meta      coordinate.WorkSpecMeta
	)

	namespace, err = Coordinate.Namespace("TestMetaContinuous")
	if !assert.NoError(t, err) {
		return
	}
	defer namespace.Destroy()

	spec, err = namespace.SetWorkSpec(map[string]interface{}{
		"name":   "spec",
		"min_gb": 1,
	})
	if !assert.NoError(t, err) {
		return
	}

	meta, err = spec.Meta(false)
	if assert.NoError(t, err) {
		assert.False(t, meta.Continuous)
		assert.False(t, meta.CanBeContinuous)
	}

	meta.Continuous = true
	err = spec.SetMeta(meta)
	assert.NoError(t, err)

	meta, err = spec.Meta(false)
	if assert.NoError(t, err) {
		// Cannot set the "continuous" flag
		assert.False(t, meta.Continuous)
		assert.False(t, meta.CanBeContinuous)
	}
}

// ------------------------------------------------------------------------
// Coordinate setup helpers:
func createWorkUnits(spec coordinate.WorkSpec, n int, t assert.TestingT) {
	for i := 0; i < n; i++ {
		_, err := spec.AddWorkUnit(fmt.Sprintf("u%v", i), map[string]interface{}{}, coordinate.WorkUnitMeta{})
		assert.NoError(t, err)
	}
}

// TestSetMeta tests the basic SetMeta() call and a couple of its
// documented oddities.
func TestSetMeta(t *testing.T) {
	var (
		err       error
		namespace coordinate.Namespace
		spec      coordinate.WorkSpec
		meta      coordinate.WorkSpecMeta
	)

	namespace, err = Coordinate.Namespace("TestSetMeta")
	if !assert.NoError(t, err) {
		return
	}
	defer namespace.Destroy()

	spec, err = namespace.SetWorkSpec(map[string]interface{}{
		"name":       "spec",
		"min_gb":     1,
		"continuous": true,
	})
	if !assert.NoError(t, err) {
		return
	}

	meta, err = spec.Meta(false)
	if assert.NoError(t, err) {
		assert.Equal(t, 0, meta.Priority)
		assert.Equal(t, 20, meta.Weight)
		assert.False(t, meta.Paused)
		assert.True(t, meta.Continuous)
		assert.True(t, meta.CanBeContinuous)
		assert.Zero(t, meta.Interval)
		assert.WithinDuration(t, time.Time{}, meta.NextContinuous, 1*time.Microsecond)
		assert.Equal(t, 0, meta.MaxRunning)
		assert.Equal(t, 0, meta.MaxAttemptsReturned)
		assert.Equal(t, "", meta.NextWorkSpecName)
		assert.Equal(t, 0, meta.AvailableCount)
		assert.Equal(t, 0, meta.PendingCount)
		assert.Equal(t, "", meta.Runtime)
	}

	err = spec.SetMeta(coordinate.WorkSpecMeta{
		Priority:            10,
		Weight:              100,
		Paused:              true,
		Continuous:          false,
		CanBeContinuous:     false,
		Interval:            time.Duration(60) * time.Second,
		MaxRunning:          10,
		MaxAttemptsReturned: 1,
		NextWorkSpecName:    "then",
		AvailableCount:      100,
		PendingCount:        50,
		Runtime:             "go",
	})
	assert.NoError(t, err)

	meta, err = spec.Meta(false)
	if assert.NoError(t, err) {
		assert.Equal(t, 10, meta.Priority)
		assert.Equal(t, 100, meta.Weight)
		assert.True(t, meta.Paused)
		assert.False(t, meta.Continuous)
		// Cannot clear "can be continuous" flag
		assert.True(t, meta.CanBeContinuous)
		assert.Equal(t, 60*time.Second, meta.Interval)
		assert.WithinDuration(t, time.Time{}, meta.NextContinuous, 1*time.Microsecond)
		assert.Equal(t, 10, meta.MaxRunning)
		assert.Equal(t, 1, meta.MaxAttemptsReturned)
		// Cannot change following work spec
		assert.Equal(t, "", meta.NextWorkSpecName)
		// Cannot set the counts
		assert.Equal(t, 0, meta.AvailableCount)
		assert.Equal(t, 0, meta.PendingCount)
		// Cannot change the language runtime
		assert.Equal(t, "", meta.Runtime)
	}
}

// TestTwoWorkSpecsBasic ensures that two work specs can be created
// and have independent lifetimes.
func TestTwoWorkSpecsBasic(t *testing.T) {
	var (
		err          error
		dict1, dict2 map[string]interface{}
		name1, name2 string
		names        []string
		spec         coordinate.WorkSpec
	)

	namespace, err := Coordinate.Namespace("TestTwoWorkSpecsBasic")
	if !assert.NoError(t, err) {
		return
	}
	defer namespace.Destroy()

	name1 = "spec1"
	name2 = "spec2"

	dict1 = map[string]interface{}{"name": name1, "min_gb": 1}
	dict2 = map[string]interface{}{"name": name2, "min_gb": 2}

	names, err = namespace.WorkSpecNames()
	if assert.NoError(t, err) {
		assert.Len(t, names, 0)
	}

	spec, err = namespace.SetWorkSpec(dict1)
	assert.NoError(t, err)

	names, err = namespace.WorkSpecNames()
	if assert.NoError(t, err) {
		assert.Equal(t, []string{name1}, names)
	}

	spec, err = namespace.SetWorkSpec(dict2)
	assert.NoError(t, err)

	names, err = namespace.WorkSpecNames()
	if assert.NoError(t, err) {
		assert.Len(t, names, 2)
		assert.Contains(t, names, name1)
		assert.Contains(t, names, name2)
	}

	spec, err = namespace.WorkSpec(name1)
	if assert.NoError(t, err) && assert.NotNil(t, spec) {
		assert.Equal(t, name1, spec.Name())
	}

	spec, err = namespace.WorkSpec(name2)
	if assert.NoError(t, err) && assert.NotNil(t, spec) {
		assert.Equal(t, name2, spec.Name())
	}

	err = namespace.DestroyWorkSpec(name1)
	assert.NoError(t, err)

	names, err = namespace.WorkSpecNames()
	if assert.NoError(t, err) {
		assert.Len(t, names, 1)
		assert.Contains(t, names, name2)
	}

	spec, err = namespace.WorkSpec(name1)
	assert.Equal(t, coordinate.ErrNoSuchWorkSpec{Name: name1}, err)

	spec, err = namespace.WorkSpec(name2)
	if assert.NoError(t, err) && assert.NotNil(t, spec) {
		assert.Equal(t, name2, spec.Name())
	}

	err = namespace.DestroyWorkSpec(name2)
	assert.NoError(t, err)

	names, err = namespace.WorkSpecNames()
	if assert.NoError(t, err) {
		assert.Len(t, names, 0)
	}

	spec, err = namespace.WorkSpec(name1)
	assert.Equal(t, coordinate.ErrNoSuchWorkSpec{Name: name1}, err)

	spec, err = namespace.WorkSpec(name2)
	assert.Equal(t, coordinate.ErrNoSuchWorkSpec{Name: name2}, err)
}

// TestWorkUnitChaining tests that completing work units in one work spec
// will cause work units to appear in another, if so configured.
func TestWorkUnitChaining(t *testing.T) {
	var (
		err      error
		one, two coordinate.WorkSpec
		units    map[string]coordinate.WorkUnit
		attempt  coordinate.Attempt
	)

	sts := SimpleTestSetup{
		NamespaceName: "TestWorkUnitChaining",
		WorkerName:    "worker",
	}
	sts.SetUp(t)
	defer sts.TearDown(t)

	one, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name": "one",
		"then": "two",
	})
	if !assert.NoError(t, err) {
		return
	}
	// RequestAttempts always returns this
	sts.WorkSpec = one

	two, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name":     "two",
		"disabled": true,
	})
	if !assert.NoError(t, err) {
		return
	}

	// Create and perform a work unit, with no output
	_, err = one.AddWorkUnit("a", map[string]interface{}{}, coordinate.WorkUnitMeta{})
	assert.NoError(t, err)

	sts.WorkSpec = one
	attempt = sts.RequestOneAttempt(t)
	err = attempt.Finish(nil)
	assert.NoError(t, err)

	units, err = two.WorkUnits(coordinate.WorkUnitQuery{})
	if assert.NoError(t, err) {
		assert.Empty(t, units)
	}

	// Create and perform a work unit, with a map output
	_, err = one.AddWorkUnit("b", map[string]interface{}{}, coordinate.WorkUnitMeta{})
	assert.NoError(t, err)

	attempt = sts.RequestOneAttempt(t)
	err = attempt.Finish(map[string]interface{}{
		"output": map[string]interface{}{
			"two_b": map[string]interface{}{"k": "v"},
		},
	})
	assert.NoError(t, err)

	units, err = two.WorkUnits(coordinate.WorkUnitQuery{})
	if assert.NoError(t, err) {
		assert.Len(t, units, 1)
		if assert.Contains(t, units, "two_b") {
			DataMatches(t, units["two_b"], map[string]interface{}{"k": "v"})
		}
	}

	// Create and perform a work unit, with a slice output
	_, err = one.AddWorkUnit("c", map[string]interface{}{}, coordinate.WorkUnitMeta{})
	assert.NoError(t, err)

	attempt = sts.RequestOneAttempt(t)
	err = attempt.Finish(map[string]interface{}{
		"output": []string{"two_c", "two_cc"},
	})
	assert.NoError(t, err)

	units, err = two.WorkUnits(coordinate.WorkUnitQuery{})
	if assert.NoError(t, err) {
		assert.Len(t, units, 3)
		assert.Contains(t, units, "two_b")
		assert.Contains(t, units, "two_cc")
		if assert.Contains(t, units, "two_c") {
			DataEmpty(t, units["two_c"])
		}
	}

	// Put the output in the original work unit data
	_, err = one.AddWorkUnit("d", map[string]interface{}{
		"output": []string{"two_d"},
	}, coordinate.WorkUnitMeta{})
	assert.NoError(t, err)
	attempt = sts.RequestOneAttempt(t)
	err = attempt.Finish(nil)
	assert.NoError(t, err)

	units, err = two.WorkUnits(coordinate.WorkUnitQuery{})
	if assert.NoError(t, err) {
//.........这里部分代码省略.........

// UpdateWorkUnit causes some state change in a work unit.  If the
// work unit is pending, this is the principal interface to complete
// or renew it; if it is already complete this can cause it to be
// retried.
func (jobs *JobServer) UpdateWorkUnit(
	workSpecName string,
	workUnitKey string,
	options map[string]interface{},
) (bool, string, error) {
	// Note that in several corner cases, the behavior of this as
	// written disagrees with Python coordinated's:
	//
	// * If neither "lease_time" nor "status" is specified,
	//   Python coordinated immediately returns False without
	//   checking if workUnitKey is valid
	//
	// * Python coordinated allows arbitrary status changes,
	//   including AVAILABLE -> FINISHED
	//
	// * This openly ignores "worker_id", as distinct from Python
	//   coordinated, which logs an obscure warning and changes it,
	//   but only on a renew
	var (
		attempt    coordinate.Attempt
		changed    bool
		err        error
		status     coordinate.AttemptStatus
		uwuOptions UpdateWorkUnitOptions
		workSpec   coordinate.WorkSpec
		workUnit   coordinate.WorkUnit
	)
	err = decode(&uwuOptions, options)
	if err == nil {
		workSpec, err = jobs.Namespace.WorkSpec(workSpecName)
	}
	if err == nil {
		workUnit, err = workSpec.WorkUnit(workUnitKey)
	}
	if err == nil {
		if workUnit == nil {
			return false, fmt.Sprintf("no such work unit key=%v", workUnitKey), nil
		}
	}
	if err == nil {
		attempt, err = workUnit.ActiveAttempt()
	}
	if err == nil && attempt != nil {
		status, err = attempt.Status()
	}
	if err == nil && attempt != nil {
		if status == coordinate.Expired || status == coordinate.Retryable {
			// The Python Coordinate API sees both of these
			// statuses as "available", and we want to fall
			// into the next block.
			attempt = nil
		}
	}
	if err == nil && attempt == nil {
		// Caller is trying to manipulate an AVAILABLE work
		// unit.  Either they are trying to change the work
		// unit data in place, or they are trying to jump a
		// work unit directly to a completed state.  (The
		// latter is possible during the Python work unit
		// parent cleanup, if the timing is bad.)
		if uwuOptions.Status == Available || uwuOptions.Status == 0 {
			// The only thing we are doing is changing the
			// work unit data.
			if uwuOptions.Data != nil {
				meta, err := workUnit.Meta()
				if err == nil {
					_, err = workSpec.AddWorkUnit(workUnit.Name(), uwuOptions.Data, meta)
				}
				if err == nil {
					changed = true
				}
			}
			return changed && err == nil, "", err
		}
		// Otherwise we are trying to transition to another
		// state; so force-create an attempt.
		worker, err := jobs.Namespace.Worker(uwuOptions.WorkerID)
		if err == nil {
			attempt, err = worker.MakeAttempt(workUnit, uwuOptions.LeaseDuration())
			status = coordinate.Pending
		}
	}
	if err == nil {
		switch status {
		case coordinate.Pending:
			changed = true // or there's an error
			switch uwuOptions.Status {
			case 0, Pending:
				err = attempt.Renew(uwuOptions.LeaseDuration(), uwuOptions.Data)
			case Available:
				err = attempt.Expire(uwuOptions.Data)
			case Finished:
				err = attempt.Finish(uwuOptions.Data)
			case Failed:
				err = attempt.Fail(uwuOptions.Data)
			default:
//.........这里部分代码省略.........

// TestChainingTwoStep separately renews an attempt to insert an output
// key, then finishes the work unit; it should still chain.
func TestChainingTwoStep(t *testing.T) {
	var (
		one, two coordinate.WorkSpec
		attempt  coordinate.Attempt
		units    map[string]coordinate.WorkUnit
		unit     coordinate.WorkUnit
		err      error
	)

	sts := SimpleTestSetup{
		NamespaceName: "TestChainingTwoStep",
		WorkerName:    "worker",
	}
	sts.SetUp(t)
	defer sts.TearDown(t)

	one, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name": "one",
		"then": "two",
	})
	if !assert.NoError(t, err) {
		return
	}

	two, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name": "two",
	})
	if !assert.NoError(t, err) {
		return
	}

	_, err = one.AddWorkUnit("a", map[string]interface{}{}, coordinate.WorkUnitMeta{})
	assert.NoError(t, err)

	sts.WorkSpec = one
	attempt = sts.RequestOneAttempt(t)
	err = attempt.Renew(900*time.Second,
		map[string]interface{}{
			"output": []interface{}{
				[]byte{1, 2, 3, 4},
				cborrpc.PythonTuple{Items: []interface{}{
					[]byte{1, 2, 3, 4},
					map[interface{}]interface{}{},
					map[interface{}]interface{}{
						"priority": 0,
					},
				}},
			},
		})
	assert.NoError(t, err)

	err = attempt.Finish(nil)
	assert.NoError(t, err)

	units, err = two.WorkUnits(coordinate.WorkUnitQuery{})
	if assert.NoError(t, err) {
		if assert.Contains(t, units, "\x01\x02\x03\x04") {
			unit = units["\x01\x02\x03\x04"]
			DataEmpty(t, unit)
			UnitHasPriority(t, unit, 0.0)
		}
	}
}

// TestByRuntime creates two work specs with different runtimes, and
// validates that requests that want a specific runtime get it.
func TestByRuntime(t *testing.T) {
	// The specific thing we'll simulate here is one Python
	// worker, using the jobserver interface, with an empty
	// runtime string, plus one Go worker, using the native API,
	// with a "go" runtime.
	var (
		err          error
		pSpec, gSpec coordinate.WorkSpec
		pUnit, gUnit coordinate.WorkUnit
		attempts     []coordinate.Attempt
	)

	sts := SimpleTestSetup{
		NamespaceName: "TestByRuntime",
		WorkerName:    "worker",
	}
	sts.SetUp(t)
	defer sts.TearDown(t)

	pSpec, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name": "p",
	})
	if !assert.NoError(t, err) {
		return
	}
	pUnit, err = pSpec.AddWorkUnit("p", map[string]interface{}{}, coordinate.WorkUnitMeta{})
	if !assert.NoError(t, err) {
		return
	}

	gSpec, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name":    "g",
		"runtime": "go",
	})
	if !assert.NoError(t, err) {
		return
	}
	gUnit, err = gSpec.AddWorkUnit("g", map[string]interface{}{}, coordinate.WorkUnitMeta{})
	if !assert.NoError(t, err) {
		return
	}

	// If we use default settings for RequestAttempts, we should
	// get back both work units
	Clock.Add(5 * time.Second)
	attempts, err = sts.Worker.RequestAttempts(coordinate.AttemptRequest{})
	if assert.NoError(t, err) && assert.Len(t, attempts, 1) {
		err = attempts[0].Finish(map[string]interface{}{})
		assert.NoError(t, err)

		wasP := attempts[0].WorkUnit().Name() == "p"

		// Get more attempts
		Clock.Add(time.Duration(5) * time.Second)
		attempts, err = sts.Worker.RequestAttempts(coordinate.AttemptRequest{})
		if assert.NoError(t, err) && assert.Len(t, attempts, 1) {
			err = attempts[0].Finish(map[string]interface{}{})
			assert.NoError(t, err)

			// Should have gotten the other work spec
			if wasP {
				assert.Equal(t, "g", attempts[0].WorkUnit().Name())
			} else {
				assert.Equal(t, "p", attempts[0].WorkUnit().Name())
			}
		}

		// Now there shouldn't be anything more
		Clock.Add(5 * time.Second)
		sts.RequestNoAttempts(t)
	}

	// Reset the world
	err = pUnit.ClearActiveAttempt()
	assert.NoError(t, err)
	err = gUnit.ClearActiveAttempt()
	assert.NoError(t, err)

	// What we expect to get from jobserver
	Clock.Add(5 * time.Second)
	attempts, err = sts.Worker.RequestAttempts(coordinate.AttemptRequest{
		Runtimes: []string{""},
	})
	if assert.NoError(t, err) && assert.Len(t, attempts, 1) {
		assert.Equal(t, "p", attempts[0].WorkUnit().Name())
		err = attempts[0].Retry(map[string]interface{}{}, time.Duration(0))
		assert.NoError(t, err)
	}

	// A more sophisticated Python check
	Clock.Add(5 * time.Second)
	attempts, err = sts.Worker.RequestAttempts(coordinate.AttemptRequest{
		Runtimes: []string{"python", "python_2", "python_2.7", ""},
	})
	if assert.NoError(t, err) && assert.Len(t, attempts, 1) {
		assert.Equal(t, "p", attempts[0].WorkUnit().Name())
		err = attempts[0].Retry(map[string]interface{}{}, time.Duration(0))
		assert.NoError(t, err)
//.........这里部分代码省略.........

// TestChainingDuplicate tests that work unit chaining still works
// even when the same output work unit is generated twice (it should
// get retried).
func TestChainingDuplicate(t *testing.T) {
	var (
		err      error
		one, two coordinate.WorkSpec
		attempt  coordinate.Attempt
	)

	sts := SimpleTestSetup{
		NamespaceName: "TestChainingDuplicate",
		WorkerName:    "worker",
	}
	sts.SetUp(t)
	defer sts.TearDown(t)

	one, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name":     "one",
		"then":     "two",
		"priority": 1,
	})
	if !assert.NoError(t, err) {
		return
	}

	two, err = sts.Namespace.SetWorkSpec(map[string]interface{}{
		"name":     "two",
		"priority": 2,
	})
	if !assert.NoError(t, err) {
		return
	}

	_, err = one.AddWorkUnit("a", map[string]interface{}{}, coordinate.WorkUnitMeta{})
	assert.NoError(t, err)

	_, err = one.AddWorkUnit("b", map[string]interface{}{}, coordinate.WorkUnitMeta{})
	assert.NoError(t, err)

	sts.WorkSpec = one
	attempt = sts.RequestOneAttempt(t)
	assert.Equal(t, "a", attempt.WorkUnit().Name())

	err = attempt.Finish(map[string]interface{}{
		"output": []string{"z"},
	})
	assert.NoError(t, err)

	sts.WorkSpec = two
	attempt = sts.RequestOneAttempt(t)
	assert.Equal(t, "z", attempt.WorkUnit().Name())

	err = attempt.Finish(map[string]interface{}{})
	assert.NoError(t, err)

	sts.WorkSpec = one
	attempt = sts.RequestOneAttempt(t)
	assert.Equal(t, "b", attempt.WorkUnit().Name())

	err = attempt.Finish(map[string]interface{}{
		"output": []string{"z"},
	})
	assert.NoError(t, err)

	sts.WorkSpec = two
	attempt = sts.RequestOneAttempt(t)
	assert.Equal(t, "z", attempt.WorkUnit().Name())

	err = attempt.Finish(map[string]interface{}{})
	assert.NoError(t, err)

	sts.RequestNoAttempts(t)
}