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eventsworkflow.go
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eventsworkflow.go
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package dispatcher
import (
"context"
"errors"
"fmt"
"maps"
"go.temporal.io/api/serviceerror"
"go.temporal.io/sdk/workflow"
"go.uber.org/zap"
"go.autokitteh.dev/autokitteh/internal/backend/temporalclient"
"go.autokitteh.dev/autokitteh/internal/kittehs"
"go.autokitteh.dev/autokitteh/sdk/sdkerrors"
"go.autokitteh.dev/autokitteh/sdk/sdkservices"
"go.autokitteh.dev/autokitteh/sdk/sdktypes"
)
var (
eventInputsSymbolValue = sdktypes.NewSymbolValue(kittehs.Must1(sdktypes.ParseSymbol("event")))
triggerInputsSymbolValue = sdktypes.NewSymbolValue(kittehs.Must1(sdktypes.ParseSymbol("trigger")))
dataSymbolValue = sdktypes.NewSymbolValue(kittehs.Must1(sdktypes.ParseSymbol("data")))
)
func (d *dispatcher) createEventRecord(ctx context.Context, eventID sdktypes.EventID, state sdktypes.EventState) error {
record := sdktypes.NewEventRecord(eventID, state)
if err := d.services.Events.AddEventRecord(ctx, record); err != nil {
d.z.Panic("Failed updating event state record", zap.String("eventID", eventID.String()), zap.String("state", state.String()), zap.Error(err))
}
return nil
}
func (d *dispatcher) getEventSessionData(ctx context.Context, event sdktypes.Event, opts *sdkservices.DispatchOptions) ([]sessionData, error) {
if opts == nil {
opts = &sdkservices.DispatchOptions{}
}
z := d.z.With(zap.String("event_id", event.ID().String()))
if opts.Env != "" {
z = z.With(zap.String("env", opts.Env))
}
if opts.DeploymentID.IsValid() {
z = z.With(zap.String("deployment_id", opts.DeploymentID.String()))
}
if !event.IsValid() {
z.Error("could not find event")
return nil, sdkerrors.ErrNotFound
}
optsEnvID, err := resolveEnv(ctx, &d.services, opts.Env)
if err != nil {
if errors.Is(err, sdkerrors.ErrNotFound) {
z.Info("env is not configured")
return nil, nil
}
return nil, fmt.Errorf("env: %w", err)
}
if optsEnvID.IsValid() {
z = z.With(zap.String("env_id", optsEnvID.String()))
}
cid := event.ConnectionID()
conn, err := d.services.Connections.Get(ctx, cid)
if err != nil {
return nil, fmt.Errorf("get connection: %w", err)
}
if !conn.IsValid() {
return nil, sdkerrors.ErrNotFound
}
iid := conn.IntegrationID()
ts, err := d.services.Triggers.List(ctx, sdkservices.ListTriggersFilter{ConnectionID: cid})
if err != nil {
return nil, fmt.Errorf("list triggers: %w", err)
}
if len(ts) == 0 {
z.Info("no triggers for eventID")
return nil, nil
}
var sds []sessionData
eventType := event.Type()
for _, t := range ts {
envID := t.EnvID()
triggerEventType := t.EventType()
z := z.With(zap.String("env_id", envID.String()), zap.String("event_type", triggerEventType))
if triggerEventType != "" && eventType != triggerEventType {
z.Debug("irrelevant event type")
continue
}
if !envID.IsValid() && optsEnvID.IsValid() && envID != optsEnvID {
z.Debug("irrelevant env", zap.String("expected", optsEnvID.String()))
continue
}
relevant, additionalTriggerData, err := processSpecialTrigger(t, iid, event)
if err != nil {
continue
} else if !relevant {
z.Debug("irrelevant event for special trigger")
continue
}
if relevant, err := event.Matches(t.Filter()); err != nil {
z.Debug("filter error", zap.Error(err))
// TODO(ENG-566): alert user their filter is bad. Integrate with alerting and monitoring.
continue
} else if !relevant {
z.Debug("irrelevant event")
continue
}
activeDeployments, err := d.services.Deployments.List(ctx, sdkservices.ListDeploymentsFilter{State: sdktypes.DeploymentStateActive, EnvID: envID})
if err != nil {
z.Panic("could not fetch active deployments", zap.Error(err))
}
var testingDeployments []sdktypes.Deployment
if optsEnvID.IsValid() || opts.DeploymentID.IsValid() {
testingDeployments, err = d.services.Deployments.List(ctx, sdkservices.ListDeploymentsFilter{State: sdktypes.DeploymentStateTesting, EnvID: envID})
if err != nil {
z.Panic("could not fetch testing deployments", zap.Error(err))
}
}
if len(activeDeployments)+len(testingDeployments) == 0 {
z.Debug("no deployments")
continue
}
deployments := append(activeDeployments, testingDeployments...)
if optsEnvID.IsValid() || opts.DeploymentID.IsValid() {
deployments = kittehs.Filter(deployments, func(deployment sdktypes.Deployment) bool {
return (!optsEnvID.IsValid() || optsEnvID == deployment.EnvID()) &&
(!opts.DeploymentID.IsValid() || opts.DeploymentID == deployment.ID())
})
}
cl := t.CodeLocation()
for _, dep := range deployments {
sds = append(sds, sessionData{deployment: dep, codeLocation: cl, trigger: t, additionalTriggerData: additionalTriggerData})
z.Debug("relevant deployment found", zap.String("deployment_id", dep.ID().String()))
}
}
return sds, nil
}
func (d *dispatcher) signalWorkflows(ctx context.Context, event sdktypes.Event) error {
eid := event.ID()
z := d.z.With(zap.String("event_id", eid.String()))
if !event.IsValid() {
z.Error("could not find event")
return sdkerrors.ErrNotFound
}
cid := event.ConnectionID()
conn, err := d.services.Connections.Get(ctx, cid)
if err != nil {
z.Panic("could not fetch connections", zap.Error(err))
}
if !conn.IsValid() {
z.Info("no connections for event id", zap.String("connection_id", cid.String()))
return nil
}
signals, err := d.db.ListSignalsWaitingOnConnection(ctx, conn.ID())
if err != nil {
z.Error("could not fetch signals", zap.Error(err))
return err
}
z.Debug("found signal candidates", zap.Int("count", len(signals)))
for _, signal := range signals {
if err := d.temporal.SignalWorkflow(ctx, signal.WorkflowID, "", signal.SignalID, eid); err != nil {
var nferr *serviceerror.NotFound
if !errors.As(err, &nferr) {
z.Error("could not signal workflow", zap.Error(err))
return err
}
z.Debug("workflow not found, removing signal", zap.String("signal_id", signal.SignalID))
if err := d.db.RemoveSignal(ctx, signal.SignalID); err != nil {
return err
}
}
z.Debug("signaled workflow", zap.String("workflow_id", signal.WorkflowID))
}
return nil
}
func (d *dispatcher) eventsWorkflow(ctx workflow.Context, input eventsWorkflowInput) (*eventsWorkflowOutput, error) {
logger := workflow.GetLogger(ctx)
logger.Info("started events workflow", "event_id", input.EventID)
z := d.z.With(zap.String("event_id", input.EventID.String()))
event, err := d.services.Events.Get(context.TODO(), input.EventID)
if err != nil {
return nil, fmt.Errorf("get event: %w", err)
}
if !event.IsValid() {
z.Error("could not find event")
return nil, sdkerrors.ErrNotFound
}
// Set event to processing
if err := d.createEventRecord(context.Background(), input.EventID, sdktypes.EventStateProcessing); err != nil {
return nil, err
}
// Fetch event related data
sds, err := d.getEventSessionData(context.Background(), event, input.Options)
if err != nil {
_ = d.createEventRecord(context.Background(), input.EventID, sdktypes.EventStateFailed)
logger.Error("Failed processing event", "EventID", input.EventID, "error", err)
return nil, nil
}
// start sessions
if err := d.startSessions(ctx, event, sds); err != nil {
return nil, err
}
// execute waiting signals
err = d.signalWorkflows(context.Background(), event)
if err != nil {
return nil, err
}
// Set event to Completed
if err = d.createEventRecord(context.Background(), input.EventID, sdktypes.EventStateCompleted); err != nil {
return nil, err
}
return nil, nil
}
type sessionData struct {
deployment sdktypes.Deployment
codeLocation sdktypes.CodeLocation
trigger sdktypes.Trigger
additionalTriggerData map[string]sdktypes.Value
}
func (d *dispatcher) startSessions(ctx workflow.Context, event sdktypes.Event, sessionsData []sessionData) error {
// DO NOT PASS Memo. It is not intended for automation use, just auditing.
eventInputs := event.ToValues()
eventStruct, err := sdktypes.NewStructValue(eventInputsSymbolValue, eventInputs)
if err != nil {
return fmt.Errorf("event: %w", err)
}
inputs := map[string]sdktypes.Value{
"event": eventStruct,
"data": eventInputs["data"],
}
for _, sd := range sessionsData {
if t := sd.trigger; t.IsValid() {
inputs = maps.Clone(inputs)
triggerInputs := t.ToValues()
if len(sd.additionalTriggerData) != 0 {
fs := sd.additionalTriggerData
if fs == nil {
fs = make(map[string]sdktypes.Value)
}
if data, ok := triggerInputs["data"]; ok {
maps.Copy(fs, data.GetStruct().Fields())
}
if triggerInputs["data"], err = sdktypes.NewStructValue(dataSymbolValue, fs); err != nil {
return fmt.Errorf("trigger: %w", err)
}
}
if inputs["trigger"], err = sdktypes.NewStructValue(triggerInputsSymbolValue, triggerInputs); err != nil {
return fmt.Errorf("trigger: %w", err)
}
fs := inputs["data"].GetStruct().Fields()
maps.Copy(fs, triggerInputs["data"].GetStruct().Fields())
if inputs["data"], err = sdktypes.NewStructValue(dataSymbolValue, fs); err != nil {
return fmt.Errorf("data: %w", err)
}
}
dep := sd.deployment
session := sdktypes.NewSession(dep.BuildID(), sd.codeLocation, inputs, nil).
WithDeploymentID(dep.ID()).
WithEventID(event.ID()).
WithEnvID(dep.EnvID())
goCtx := temporalclient.NewWorkflowContextAsGOContext(ctx)
// TODO(ENG-197): change to local activity.
sessionID, err := d.services.Sessions.Start(goCtx, session)
if err != nil {
// Panic in order to make the workflow retry.
d.z.Panic("could not start session")
}
d.z.Info("started session", zap.String("session_id", sessionID.String()))
}
return nil
}