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internal_worker.go
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internal_worker.go
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// 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 internal
// All code in this file is private to the package.
import (
"context"
"crypto/md5"
"encoding/hex"
"errors"
"fmt"
"io"
"math"
"os"
"reflect"
"runtime"
"strconv"
"strings"
"sync"
"time"
"github.com/gogo/protobuf/jsonpb"
"github.com/gogo/protobuf/proto"
"github.com/golang/mock/gomock"
"github.com/pborman/uuid"
commonpb "go.temporal.io/api/common/v1"
enumspb "go.temporal.io/api/enums/v1"
historypb "go.temporal.io/api/history/v1"
"go.temporal.io/api/workflowservice/v1"
"go.temporal.io/api/workflowservicemock/v1"
"go.temporal.io/sdk/converter"
"go.temporal.io/sdk/internal/common/metrics"
"go.temporal.io/sdk/internal/common/serializer"
"go.temporal.io/sdk/internal/common/util"
ilog "go.temporal.io/sdk/internal/log"
"go.temporal.io/sdk/log"
)
const (
// Set to 2 pollers for now, can adjust later if needed. The typical RTT (round-trip time) is below 1ms within data
// center. And the poll API latency is about 5ms. With 2 poller, we could achieve around 300~400 RPS.
defaultConcurrentPollRoutineSize = 2
defaultMaxConcurrentActivityExecutionSize = 1000 // Large concurrent activity execution size (1k)
defaultWorkerActivitiesPerSecond = 100000 // Large activity executions/sec (unlimited)
defaultMaxConcurrentLocalActivityExecutionSize = 1000 // Large concurrent activity execution size (1k)
defaultWorkerLocalActivitiesPerSecond = 100000 // Large activity executions/sec (unlimited)
defaultTaskQueueActivitiesPerSecond = 100000.0 // Large activity executions/sec (unlimited)
defaultMaxConcurrentTaskExecutionSize = 1000 // hardcoded max task execution size.
defaultWorkerTaskExecutionRate = 100000 // Large task execution rate (unlimited)
defaultPollerRate = 1000
defaultMaxConcurrentSessionExecutionSize = 1000 // Large concurrent session execution size (1k)
defaultDeadlockDetectionTimeout = time.Second // By default kill workflow tasks that are running more than 1 sec.
// Unlimited deadlock detection timeout is used when we want to allow workflow tasks to run indefinitely, such
// as during debugging.
unlimitedDeadlockDetectionTimeout = math.MaxInt64
testTagsContextKey = "temporal-testTags"
)
type (
// WorkflowWorker wraps the code for hosting workflow types.
// And worker is mapped 1:1 with task queue. If the user want's to poll multiple
// task queue names they might have to manage 'n' workers for 'n' task queues.
workflowWorker struct {
executionParameters workerExecutionParameters
workflowService workflowservice.WorkflowServiceClient
poller taskPoller // taskPoller to poll and process the tasks.
worker *baseWorker
localActivityWorker *baseWorker
identity string
stopC chan struct{}
}
// ActivityWorker wraps the code for hosting activity types.
// TODO: Worker doing heartbeating automatically while activity task is running
activityWorker struct {
executionParameters workerExecutionParameters
workflowService workflowservice.WorkflowServiceClient
poller taskPoller
worker *baseWorker
identity string
stopC chan struct{}
}
// sessionWorker wraps the code for hosting session creation, completion and
// activities within a session. The creationWorker polls from a global taskqueue,
// while the activityWorker polls from a resource specific taskqueue.
sessionWorker struct {
creationWorker *activityWorker
activityWorker *activityWorker
}
// Worker overrides.
workerOverrides struct {
workflowTaskHandler WorkflowTaskHandler
activityTaskHandler ActivityTaskHandler
}
// workerExecutionParameters defines worker configure/execution options.
workerExecutionParameters struct {
// Namespace name.
Namespace string
// Task queue name to poll.
TaskQueue string
// Defines how many concurrent activity executions by this worker.
ConcurrentActivityExecutionSize int
// Defines rate limiting on number of activity tasks that can be executed per second per worker.
WorkerActivitiesPerSecond float64
// MaxConcurrentActivityTaskQueuePollers is the max number of pollers for activity task queue.
MaxConcurrentActivityTaskQueuePollers int
// Defines how many concurrent workflow task executions by this worker.
ConcurrentWorkflowTaskExecutionSize int
// MaxConcurrentWorkflowTaskQueuePollers is the max number of pollers for workflow task queue.
MaxConcurrentWorkflowTaskQueuePollers int
// Defines how many concurrent local activity executions by this worker.
ConcurrentLocalActivityExecutionSize int
// Defines rate limiting on number of local activities that can be executed per second per worker.
WorkerLocalActivitiesPerSecond float64
// TaskQueueActivitiesPerSecond is the throttling limit for activity tasks controlled by the server.
TaskQueueActivitiesPerSecond float64
// User can provide an identity for the debuggability. If not provided the framework has
// a default option.
Identity string
MetricsHandler metrics.Handler
Logger log.Logger
// Enable logging in replay mode
EnableLoggingInReplay bool
// Context to store user provided key/value pairs
UserContext context.Context
// Context cancel function to cancel user context
UserContextCancel context.CancelFunc
StickyScheduleToStartTimeout time.Duration
// WorkflowPanicPolicy is used for configuring how client's workflow task handler deals with workflow
// code panicking which includes non backwards compatible changes to the workflow code without appropriate
// versioning (see workflow.GetVersion).
// The default behavior is to block workflow execution until the problem is fixed.
WorkflowPanicPolicy WorkflowPanicPolicy
DataConverter converter.DataConverter
FailureConverter converter.FailureConverter
// WorkerStopTimeout is the time delay before hard terminate worker
WorkerStopTimeout time.Duration
// WorkerStopChannel is a read only channel listen on worker close. The worker will close the channel before exit.
WorkerStopChannel <-chan struct{}
// WorkerFatalErrorCallback is a callback for fatal errors that should stop
// the worker.
WorkerFatalErrorCallback func(error)
// SessionResourceID is a unique identifier of the resource the session will consume
SessionResourceID string
ContextPropagators []ContextPropagator
// DeadlockDetectionTimeout specifies workflow task timeout.
DeadlockDetectionTimeout time.Duration
DefaultHeartbeatThrottleInterval time.Duration
MaxHeartbeatThrottleInterval time.Duration
// Pointer to the shared worker cache
cache *WorkerCache
eagerActivityExecutor *eagerActivityExecutor
}
)
var debugMode = os.Getenv("TEMPORAL_DEBUG") != ""
// newWorkflowWorker returns an instance of the workflow worker.
func newWorkflowWorker(service workflowservice.WorkflowServiceClient, params workerExecutionParameters, ppMgr pressurePointMgr, registry *registry) *workflowWorker {
return newWorkflowWorkerInternal(service, params, ppMgr, nil, registry)
}
func ensureRequiredParams(params *workerExecutionParameters) {
if params.Identity == "" {
params.Identity = getWorkerIdentity(params.TaskQueue)
}
if params.Logger == nil {
// create default logger if user does not supply one (should happen in tests only).
params.Logger = ilog.NewDefaultLogger()
params.Logger.Info("No logger configured for temporal worker. Created default one.")
}
if params.MetricsHandler == nil {
params.MetricsHandler = metrics.NopHandler
params.Logger.Info("No metrics handler configured for temporal worker. Use NopHandler as default.")
}
if params.DataConverter == nil {
params.DataConverter = converter.GetDefaultDataConverter()
params.Logger.Info("No DataConverter configured for temporal worker. Use default one.")
}
if params.FailureConverter == nil {
params.FailureConverter = GetDefaultFailureConverter()
}
}
// verifyNamespaceExist does a DescribeNamespace operation on the specified namespace with backoff/retry
func verifyNamespaceExist(
client workflowservice.WorkflowServiceClient,
metricsHandler metrics.Handler,
namespace string,
logger log.Logger,
) error {
ctx := context.Background()
if namespace == "" {
return errors.New("namespace cannot be empty")
}
grpcCtx, cancel := newGRPCContext(ctx, grpcMetricsHandler(metricsHandler), defaultGrpcRetryParameters(ctx))
defer cancel()
_, err := client.DescribeNamespace(grpcCtx, &workflowservice.DescribeNamespaceRequest{Namespace: namespace})
return err
}
func newWorkflowWorkerInternal(service workflowservice.WorkflowServiceClient, params workerExecutionParameters, ppMgr pressurePointMgr, overrides *workerOverrides, registry *registry) *workflowWorker {
workerStopChannel := make(chan struct{})
params.WorkerStopChannel = getReadOnlyChannel(workerStopChannel)
// Get a workflow task handler.
ensureRequiredParams(¶ms)
var taskHandler WorkflowTaskHandler
if overrides != nil && overrides.workflowTaskHandler != nil {
taskHandler = overrides.workflowTaskHandler
} else {
taskHandler = newWorkflowTaskHandler(params, ppMgr, registry)
}
return newWorkflowTaskWorkerInternal(taskHandler, service, params, workerStopChannel, registry.interceptors)
}
func newWorkflowTaskWorkerInternal(
taskHandler WorkflowTaskHandler,
service workflowservice.WorkflowServiceClient,
params workerExecutionParameters,
stopC chan struct{},
interceptors []WorkerInterceptor,
) *workflowWorker {
ensureRequiredParams(¶ms)
poller := newWorkflowTaskPoller(taskHandler, service, params)
worker := newBaseWorker(baseWorkerOptions{
pollerCount: params.MaxConcurrentWorkflowTaskQueuePollers,
pollerRate: defaultPollerRate,
maxConcurrentTask: params.ConcurrentWorkflowTaskExecutionSize,
maxTaskPerSecond: defaultWorkerTaskExecutionRate,
taskWorker: poller,
identity: params.Identity,
workerType: "WorkflowWorker",
stopTimeout: params.WorkerStopTimeout,
fatalErrCb: params.WorkerFatalErrorCallback},
params.Logger,
params.MetricsHandler,
nil,
)
// laTunnel is the glue that hookup 3 parts
laTunnel := newLocalActivityTunnel(params.WorkerStopChannel)
// 1) workflow handler will send local activity task to laTunnel
if handlerImpl, ok := taskHandler.(*workflowTaskHandlerImpl); ok {
handlerImpl.laTunnel = laTunnel
}
// 2) local activity task poller will poll from laTunnel, and result will be pushed to laTunnel
localActivityTaskPoller := newLocalActivityPoller(params, laTunnel, interceptors)
localActivityWorker := newBaseWorker(baseWorkerOptions{
pollerCount: 1, // 1 poller (from local channel) is enough for local activity
maxConcurrentTask: params.ConcurrentLocalActivityExecutionSize,
maxTaskPerSecond: params.WorkerLocalActivitiesPerSecond,
taskWorker: localActivityTaskPoller,
identity: params.Identity,
workerType: "LocalActivityWorker",
stopTimeout: params.WorkerStopTimeout,
fatalErrCb: params.WorkerFatalErrorCallback},
params.Logger,
params.MetricsHandler,
nil,
)
// 3) the result pushed to laTunnel will be send as task to workflow worker to process.
worker.taskQueueCh = laTunnel.resultCh
return &workflowWorker{
executionParameters: params,
workflowService: service,
poller: poller,
worker: worker,
localActivityWorker: localActivityWorker,
identity: params.Identity,
stopC: stopC,
}
}
// Start the worker.
func (ww *workflowWorker) Start() error {
err := verifyNamespaceExist(ww.workflowService, ww.executionParameters.MetricsHandler, ww.executionParameters.Namespace, ww.worker.logger)
if err != nil {
return err
}
ww.localActivityWorker.Start()
ww.worker.Start()
return nil // TODO: propagate error
}
// Stop the worker.
func (ww *workflowWorker) Stop() {
close(ww.stopC)
// TODO: remove the stop methods in favor of the workerStopChannel
ww.localActivityWorker.Stop()
ww.worker.Stop()
}
func newSessionWorker(service workflowservice.WorkflowServiceClient, params workerExecutionParameters, overrides *workerOverrides, env *registry, maxConcurrentSessionExecutionSize int) *sessionWorker {
if params.Identity == "" {
params.Identity = getWorkerIdentity(params.TaskQueue)
}
// For now resourceID is hidden from user so we will always create a unique one for each worker.
if params.SessionResourceID == "" {
params.SessionResourceID = uuid.New()
}
sessionEnvironment := newSessionEnvironment(params.SessionResourceID, maxConcurrentSessionExecutionSize)
creationTaskqueue := getCreationTaskqueue(params.TaskQueue)
params.UserContext = context.WithValue(params.UserContext, sessionEnvironmentContextKey, sessionEnvironment)
params.TaskQueue = sessionEnvironment.GetResourceSpecificTaskqueue()
activityWorker := newActivityWorker(service, params, overrides, env, nil)
params.MaxConcurrentActivityTaskQueuePollers = 1
params.TaskQueue = creationTaskqueue
// Although we have session token bucket to limit session size across creation
// and recreation, we also limit it here for creation only
params.ConcurrentActivityExecutionSize = maxConcurrentSessionExecutionSize
creationWorker := newActivityWorker(service, params, overrides, env, sessionEnvironment.GetTokenBucket())
return &sessionWorker{
creationWorker: creationWorker,
activityWorker: activityWorker,
}
}
func (sw *sessionWorker) Start() error {
err := sw.creationWorker.Start()
if err != nil {
return err
}
err = sw.activityWorker.Start()
if err != nil {
sw.creationWorker.Stop()
return err
}
return nil
}
func (sw *sessionWorker) Stop() {
sw.creationWorker.Stop()
sw.activityWorker.Stop()
}
func newActivityWorker(service workflowservice.WorkflowServiceClient, params workerExecutionParameters, overrides *workerOverrides, env *registry, sessionTokenBucket *sessionTokenBucket) *activityWorker {
workerStopChannel := make(chan struct{}, 1)
params.WorkerStopChannel = getReadOnlyChannel(workerStopChannel)
ensureRequiredParams(¶ms)
// Get a activity task handler.
var taskHandler ActivityTaskHandler
if overrides != nil && overrides.activityTaskHandler != nil {
taskHandler = overrides.activityTaskHandler
} else {
taskHandler = newActivityTaskHandler(service, params, env)
}
return newActivityTaskWorker(taskHandler, service, params, sessionTokenBucket, workerStopChannel)
}
func newActivityTaskWorker(taskHandler ActivityTaskHandler, service workflowservice.WorkflowServiceClient, workerParams workerExecutionParameters, sessionTokenBucket *sessionTokenBucket, stopC chan struct{}) (worker *activityWorker) {
ensureRequiredParams(&workerParams)
poller := newActivityTaskPoller(taskHandler, service, workerParams)
base := newBaseWorker(
baseWorkerOptions{
pollerCount: workerParams.MaxConcurrentActivityTaskQueuePollers,
pollerRate: defaultPollerRate,
maxConcurrentTask: workerParams.ConcurrentActivityExecutionSize,
maxTaskPerSecond: workerParams.WorkerActivitiesPerSecond,
taskWorker: poller,
identity: workerParams.Identity,
workerType: "ActivityWorker",
stopTimeout: workerParams.WorkerStopTimeout,
fatalErrCb: workerParams.WorkerFatalErrorCallback,
userContextCancel: workerParams.UserContextCancel},
workerParams.Logger,
workerParams.MetricsHandler,
sessionTokenBucket,
)
return &activityWorker{
executionParameters: workerParams,
workflowService: service,
worker: base,
poller: poller,
identity: workerParams.Identity,
stopC: stopC,
}
}
// Start the worker.
func (aw *activityWorker) Start() error {
err := verifyNamespaceExist(aw.workflowService, aw.executionParameters.MetricsHandler, aw.executionParameters.Namespace, aw.worker.logger)
if err != nil {
return err
}
aw.worker.Start()
return nil // TODO: propagate errors
}
// Stop the worker.
func (aw *activityWorker) Stop() {
close(aw.stopC)
aw.worker.Stop()
}
type registry struct {
sync.Mutex
workflowFuncMap map[string]interface{}
workflowAliasMap map[string]string
activityFuncMap map[string]activity
activityAliasMap map[string]string
interceptors []WorkerInterceptor
}
type registryOptions struct {
disableAliasing bool
}
func (r *registry) RegisterWorkflow(af interface{}) {
r.RegisterWorkflowWithOptions(af, RegisterWorkflowOptions{})
}
func (r *registry) RegisterWorkflowWithOptions(
wf interface{},
options RegisterWorkflowOptions,
) {
// Support direct registration of WorkflowDefinition
factory, ok := wf.(WorkflowDefinitionFactory)
if ok {
if len(options.Name) == 0 {
panic("WorkflowDefinitionFactory must be registered with a name")
}
r.workflowFuncMap[options.Name] = factory
return
}
// Validate that it is a function
fnType := reflect.TypeOf(wf)
if err := validateFnFormat(fnType, true); err != nil {
panic(err)
}
fnName, _ := getFunctionName(wf)
alias := options.Name
registerName := fnName
if len(alias) > 0 {
registerName = alias
}
r.Lock()
defer r.Unlock()
if !options.DisableAlreadyRegisteredCheck {
if _, ok := r.workflowFuncMap[registerName]; ok {
panic(fmt.Sprintf("workflow name \"%v\" is already registered", registerName))
}
}
r.workflowFuncMap[registerName] = wf
if len(alias) > 0 && r.workflowAliasMap != nil {
r.workflowAliasMap[fnName] = alias
}
}
func (r *registry) RegisterActivity(af interface{}) {
r.RegisterActivityWithOptions(af, RegisterActivityOptions{})
}
func (r *registry) RegisterActivityWithOptions(
af interface{},
options RegisterActivityOptions,
) {
// Support direct registration of activity
a, ok := af.(activity)
if ok {
if options.Name == "" {
panic("registration of activity interface requires name")
}
r.addActivityWithLock(options.Name, a)
return
}
// Validate that it is a function
fnType := reflect.TypeOf(af)
if fnType.Kind() == reflect.Ptr && fnType.Elem().Kind() == reflect.Struct {
registerErr := r.registerActivityStructWithOptions(af, options)
if registerErr != nil {
panic(registerErr)
}
return
}
if err := validateFnFormat(fnType, false); err != nil {
panic(err)
}
fnName, _ := getFunctionName(af)
alias := options.Name
registerName := fnName
if len(alias) > 0 {
registerName = alias
}
r.Lock()
defer r.Unlock()
if !options.DisableAlreadyRegisteredCheck {
if _, ok := r.activityFuncMap[registerName]; ok {
panic(fmt.Sprintf("activity type \"%v\" is already registered", registerName))
}
}
r.activityFuncMap[registerName] = &activityExecutor{name: registerName, fn: af}
if len(alias) > 0 && r.activityAliasMap != nil {
r.activityAliasMap[fnName] = alias
}
}
func (r *registry) registerActivityStructWithOptions(aStruct interface{}, options RegisterActivityOptions) error {
r.Lock()
defer r.Unlock()
structValue := reflect.ValueOf(aStruct)
structType := structValue.Type()
count := 0
for i := 0; i < structValue.NumMethod(); i++ {
methodValue := structValue.Method(i)
method := structType.Method(i)
// skip private method
if method.PkgPath != "" {
continue
}
name := method.Name
if err := validateFnFormat(method.Type, false); err != nil {
if options.SkipInvalidStructFunctions {
continue
}
return fmt.Errorf("method %s of %s: %w", name, structType.Name(), err)
}
registerName := options.Name + name
if !options.DisableAlreadyRegisteredCheck {
if _, ok := r.getActivityNoLock(registerName); ok {
return fmt.Errorf("activity type \"%v\" is already registered", registerName)
}
}
r.activityFuncMap[registerName] = &activityExecutor{name: registerName, fn: methodValue.Interface()}
count++
}
if count == 0 {
return fmt.Errorf("no activities (public methods) found at %v structure", structType.Name())
}
return nil
}
func (r *registry) getWorkflowAlias(fnName string) (string, bool) {
r.Lock()
defer r.Unlock()
alias, ok := r.workflowAliasMap[fnName]
return alias, ok
}
func (r *registry) getWorkflowFn(fnName string) (interface{}, bool) {
r.Lock()
defer r.Unlock()
fn, ok := r.workflowFuncMap[fnName]
return fn, ok
}
func (r *registry) getRegisteredWorkflowTypes() []string {
r.Lock()
defer r.Unlock()
var result []string
for t := range r.workflowFuncMap {
result = append(result, t)
}
return result
}
func (r *registry) getActivityAlias(fnName string) (string, bool) {
r.Lock()
defer r.Unlock()
alias, ok := r.activityAliasMap[fnName]
return alias, ok
}
func (r *registry) addActivityWithLock(fnName string, a activity) {
r.Lock()
defer r.Unlock()
r.activityFuncMap[fnName] = a
}
func (r *registry) GetActivity(fnName string) (activity, bool) {
r.Lock()
defer r.Unlock()
a, ok := r.activityFuncMap[fnName]
return a, ok
}
func (r *registry) getActivityNoLock(fnName string) (activity, bool) {
a, ok := r.activityFuncMap[fnName]
return a, ok
}
func (r *registry) getRegisteredActivities() []activity {
r.Lock()
defer r.Unlock()
activities := make([]activity, 0, len(r.activityFuncMap))
for _, a := range r.activityFuncMap {
activities = append(activities, a)
}
return activities
}
func (r *registry) getRegisteredActivityTypes() []string {
r.Lock()
defer r.Unlock()
var result []string
for name := range r.activityFuncMap {
result = append(result, name)
}
return result
}
func (r *registry) getWorkflowDefinition(wt WorkflowType) (WorkflowDefinition, error) {
lookup := wt.Name
if alias, ok := r.getWorkflowAlias(lookup); ok {
lookup = alias
}
wf, ok := r.getWorkflowFn(lookup)
if !ok {
supported := strings.Join(r.getRegisteredWorkflowTypes(), ", ")
return nil, fmt.Errorf("unable to find workflow type: %v. Supported types: [%v]", lookup, supported)
}
wdf, ok := wf.(WorkflowDefinitionFactory)
if ok {
return wdf.NewWorkflowDefinition(), nil
}
executor := &workflowExecutor{workflowType: lookup, fn: wf, interceptors: r.interceptors}
return newSyncWorkflowDefinition(executor), nil
}
// Validate function parameters.
func validateFnFormat(fnType reflect.Type, isWorkflow bool) error {
if fnType.Kind() != reflect.Func {
return fmt.Errorf("expected a func as input but was %s", fnType.Kind())
}
if isWorkflow {
if fnType.NumIn() < 1 {
return fmt.Errorf(
"expected at least one argument of type workflow.Context in function, found %d input arguments",
fnType.NumIn(),
)
}
if !isWorkflowContext(fnType.In(0)) {
return fmt.Errorf("expected first argument to be workflow.Context but found %s", fnType.In(0))
}
}
// Return values
// We expect either
// <result>, error
// (or) just error
if fnType.NumOut() < 1 || fnType.NumOut() > 2 {
return fmt.Errorf(
"expected function to return result, error or just error, but found %d return values", fnType.NumOut(),
)
}
if fnType.NumOut() > 1 && !isValidResultType(fnType.Out(0)) {
return fmt.Errorf(
"expected function first return value to return valid type but found: %v", fnType.Out(0).Kind(),
)
}
if !isError(fnType.Out(fnType.NumOut() - 1)) {
return fmt.Errorf(
"expected function second return value to return error but found %v", fnType.Out(fnType.NumOut()-1).Kind(),
)
}
return nil
}
func newRegistry() *registry { return newRegistryWithOptions(registryOptions{}) }
func newRegistryWithOptions(options registryOptions) *registry {
r := ®istry{
workflowFuncMap: make(map[string]interface{}),
activityFuncMap: make(map[string]activity),
}
if !options.disableAliasing {
r.workflowAliasMap = make(map[string]string)
r.activityAliasMap = make(map[string]string)
}
return r
}
// Wrapper to execute workflow functions.
type workflowExecutor struct {
workflowType string
fn interface{}
interceptors []WorkerInterceptor
}
func (we *workflowExecutor) Execute(ctx Context, input *commonpb.Payloads) (*commonpb.Payloads, error) {
dataConverter := WithWorkflowContext(ctx, getWorkflowEnvOptions(ctx).DataConverter)
fnType := reflect.TypeOf(we.fn)
args, err := decodeArgsToRawValues(dataConverter, fnType, input)
if err != nil {
return nil, fmt.Errorf(
"unable to decode the workflow function input payload with error: %w, function name: %v",
err, we.workflowType)
}
envInterceptor := getWorkflowEnvironmentInterceptor(ctx)
envInterceptor.fn = we.fn
// Execute and serialize result
result, err := envInterceptor.inboundInterceptor.ExecuteWorkflow(ctx, &ExecuteWorkflowInput{Args: args})
var serializedResult *commonpb.Payloads
if err == nil && result != nil {
serializedResult, err = encodeArg(dataConverter, result)
}
return serializedResult, err
}
// Wrapper to execute activity functions.
type activityExecutor struct {
name string
fn interface{}
skipInterceptors bool
}
func (ae *activityExecutor) ActivityType() ActivityType {
return ActivityType{Name: ae.name}
}
func (ae *activityExecutor) GetFunction() interface{} {
return ae.fn
}
func (ae *activityExecutor) Execute(ctx context.Context, input *commonpb.Payloads) (*commonpb.Payloads, error) {
fnType := reflect.TypeOf(ae.fn)
dataConverter := getDataConverterFromActivityCtx(ctx)
args, err := decodeArgsToRawValues(dataConverter, fnType, input)
if err != nil {
return nil, fmt.Errorf(
"unable to decode the activity function input payload with error: %w for function name: %v",
err, ae.name)
}
return ae.ExecuteWithActualArgs(ctx, args)
}
func (ae *activityExecutor) ExecuteWithActualArgs(ctx context.Context, args []interface{}) (*commonpb.Payloads, error) {
dataConverter := getDataConverterFromActivityCtx(ctx)
envInterceptor := getActivityEnvironmentInterceptor(ctx)
envInterceptor.fn = ae.fn
// Execute and serialize result
interceptor := envInterceptor.inboundInterceptor
if ae.skipInterceptors {
interceptor = envInterceptor
}
result, resultErr := interceptor.ExecuteActivity(ctx, &ExecuteActivityInput{Args: args})
var serializedResult *commonpb.Payloads
if result != nil {
// As a special case, if the result is already a payload, just use it
var ok bool
if serializedResult, ok = result.(*commonpb.Payloads); !ok {
var err error
if serializedResult, err = encodeArg(dataConverter, result); err != nil {
return nil, err
}
}
}
return serializedResult, resultErr
}
func getDataConverterFromActivityCtx(ctx context.Context) converter.DataConverter {
var dataConverter converter.DataConverter
env := getActivityEnvironmentFromCtx(ctx)
if env != nil && env.dataConverter != nil {
dataConverter = env.dataConverter
} else {
dataConverter = converter.GetDefaultDataConverter()
}
return WithContext(ctx, dataConverter)
}
func getNamespaceFromActivityCtx(ctx context.Context) string {
env := getActivityEnvironmentFromCtx(ctx)
if env == nil {
return ""
}
return env.workflowNamespace
}
func getActivityEnvironmentFromCtx(ctx context.Context) *activityEnvironment {
if ctx == nil || ctx.Value(activityEnvContextKey) == nil {
return nil
}
return ctx.Value(activityEnvContextKey).(*activityEnvironment)
}
// AggregatedWorker combines management of both workflowWorker and activityWorker worker lifecycle.
type AggregatedWorker struct {
client *WorkflowClient
workflowWorker *workflowWorker
activityWorker *activityWorker
sessionWorker *sessionWorker
logger log.Logger
registry *registry
stopC chan struct{}
fatalErr error
fatalErrLock sync.Mutex
}
// RegisterWorkflow registers workflow implementation with the AggregatedWorker
func (aw *AggregatedWorker) RegisterWorkflow(w interface{}) {
if aw.workflowWorker == nil {
panic("workflow worker disabled, cannot register workflow")
}
aw.registry.RegisterWorkflow(w)
}
// RegisterWorkflowWithOptions registers workflow implementation with the AggregatedWorker
func (aw *AggregatedWorker) RegisterWorkflowWithOptions(w interface{}, options RegisterWorkflowOptions) {
if aw.workflowWorker == nil {
panic("workflow worker disabled, cannot register workflow")
}
aw.registry.RegisterWorkflowWithOptions(w, options)
}
// RegisterActivity registers activity implementation with the AggregatedWorker
func (aw *AggregatedWorker) RegisterActivity(a interface{}) {
aw.registry.RegisterActivity(a)
}
// RegisterActivityWithOptions registers activity implementation with the AggregatedWorker
func (aw *AggregatedWorker) RegisterActivityWithOptions(a interface{}, options RegisterActivityOptions) {
aw.registry.RegisterActivityWithOptions(a, options)
}
// Start the worker in a non-blocking fashion.
func (aw *AggregatedWorker) Start() error {
aw.assertNotStopped()
if err := initBinaryChecksum(); err != nil {
return fmt.Errorf("failed to get executable checksum: %v", err)
} else if err = aw.client.ensureInitialized(); err != nil {
return err
}
if !util.IsInterfaceNil(aw.workflowWorker) {
if err := aw.workflowWorker.Start(); err != nil {
return err
}
}
if !util.IsInterfaceNil(aw.activityWorker) {
if err := aw.activityWorker.Start(); err != nil {
// stop workflow worker.
if !util.IsInterfaceNil(aw.workflowWorker) {
if aw.workflowWorker.worker.isWorkerStarted {
aw.workflowWorker.Stop()
}
}
return err
}
}
if !util.IsInterfaceNil(aw.sessionWorker) && len(aw.registry.getRegisteredActivities()) > 0 {
aw.logger.Info("Starting session worker")
if err := aw.sessionWorker.Start(); err != nil {
// stop workflow worker and activity worker.
if !util.IsInterfaceNil(aw.workflowWorker) {
if aw.workflowWorker.worker.isWorkerStarted {
aw.workflowWorker.Stop()
}
}
if !util.IsInterfaceNil(aw.activityWorker) {
if aw.activityWorker.worker.isWorkerStarted {
aw.activityWorker.Stop()
}
}
return err
}
}
aw.logger.Info("Started Worker")
return nil
}
func (aw *AggregatedWorker) assertNotStopped() {
stopped := true
select {
case <-aw.stopC:
default:
stopped = false
}
if stopped {
panic("attempted to start a worker that has been stopped before")
}
}
var binaryChecksum string
var binaryChecksumLock sync.Mutex
// SetBinaryChecksum sets the identifier of the binary(aka BinaryChecksum).
// The identifier is mainly used in recording reset points when respondWorkflowTaskCompleted. For each workflow, the very first
// workflow task completed by a binary will be associated as a auto-reset point for the binary. So that when a customer wants to
// mark the binary as bad, the workflow will be reset to that point -- which means workflow will forget all progress generated
// by the binary.
// On another hand, once the binary is marked as bad, the bad binary cannot poll workflow queue and make any progress any more.
func SetBinaryChecksum(checksum string) {
binaryChecksumLock.Lock()
defer binaryChecksumLock.Unlock()
binaryChecksum = checksum
}
func initBinaryChecksum() error {
binaryChecksumLock.Lock()
defer binaryChecksumLock.Unlock()
return initBinaryChecksumLocked()
}
// callers MUST hold binaryChecksumLock before calling
func initBinaryChecksumLocked() error {
if len(binaryChecksum) > 0 {
return nil
}
exec, err := os.Executable()
if err != nil {
return err
}
f, err := os.Open(exec)
if err != nil {
return err