/
workflow_deprecated.go
379 lines (325 loc) · 9.44 KB
/
workflow_deprecated.go
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package processor
import (
"fmt"
"sort"
"sync"
"time"
"github.com/Jeffail/benthos/v3/internal/interop"
"github.com/Jeffail/benthos/v3/internal/tracing"
"github.com/Jeffail/benthos/v3/lib/log"
"github.com/Jeffail/benthos/v3/lib/metrics"
"github.com/Jeffail/benthos/v3/lib/types"
"github.com/Jeffail/gabs/v2"
)
//------------------------------------------------------------------------------
type workflowDeprecated struct {
log log.Modular
stats metrics.Type
children map[string]*ProcessMap
dag [][]string
allStages map[string]struct{}
metaPath []string
mCount metrics.StatCounter
mSent metrics.StatCounter
mSentParts metrics.StatCounter
mSkippedNoStages metrics.StatCounter
mErr metrics.StatCounter
mErrJSON metrics.StatCounter
mErrMeta metrics.StatCounter
mErrOverlay metrics.StatCounter
mErrStages map[string]metrics.StatCounter
mSuccStages map[string]metrics.StatCounter
}
func newWorkflowDeprecated(
conf Config, mgr types.Manager, log log.Modular, stats metrics.Type,
) (Type, error) {
w := &workflowDeprecated{
log: log,
stats: stats,
mErrStages: map[string]metrics.StatCounter{},
mSuccStages: map[string]metrics.StatCounter{},
metaPath: nil,
allStages: map[string]struct{}{},
}
if len(conf.Workflow.MetaPath) > 0 {
w.metaPath = gabs.DotPathToSlice(conf.Workflow.MetaPath)
}
explicitDeps := map[string][]string{}
w.children = map[string]*ProcessMap{}
for k, v := range conf.Workflow.Stages {
if len(processDAGStageName.FindString(k)) != len(k) {
return nil, fmt.Errorf("workflow stage name '%v' contains invalid characters", k)
}
bMgr, bLog, bStats := interop.LabelChild(k, mgr, log, stats)
child, err := NewProcessMap(v.ProcessMapConfig, bMgr, bLog, bStats)
if err != nil {
return nil, fmt.Errorf("failed to create child process_map '%v': %v", k, err)
}
w.children[k] = child
explicitDeps[k] = v.Dependencies
w.allStages[k] = struct{}{}
}
var err error
if w.dag, err = resolveProcessMapDAG(explicitDeps, w.children); err != nil {
return nil, err
}
w.mCount = stats.GetCounter("count")
w.mSent = stats.GetCounter("sent")
w.mSentParts = stats.GetCounter("parts.sent")
w.mSkippedNoStages = stats.GetCounter("skipped.no_stages")
w.mErr = stats.GetCounter("error")
w.mErrJSON = stats.GetCounter("error.json_parse")
w.mErrMeta = stats.GetCounter("error.meta_set")
w.mErrOverlay = stats.GetCounter("error.overlay")
w.log.Infof("Resolved workflow DAG: %v\n", w.dag)
return w, nil
}
//------------------------------------------------------------------------------
func (w *workflowDeprecated) incrStageErr(id string) {
if ctr, exists := w.mErrStages[id]; exists {
ctr.Incr(1)
return
}
ctr := w.stats.GetCounter(fmt.Sprintf("%v.error", id))
ctr.Incr(1)
w.mErrStages[id] = ctr
}
func (w *workflowDeprecated) incrStageSucc(id string) {
if ctr, exists := w.mSuccStages[id]; exists {
ctr.Incr(1)
return
}
ctr := w.stats.GetCounter(fmt.Sprintf("%v.success", id))
ctr.Incr(1)
w.mSuccStages[id] = ctr
}
type deprecatedResultTracker struct {
succeeded map[string]struct{}
skipped map[string]struct{}
failed map[string]struct{}
sync.Mutex
}
func deprecatedTrackerFromTree(tree [][]string) *deprecatedResultTracker {
r := &deprecatedResultTracker{
succeeded: map[string]struct{}{},
skipped: map[string]struct{}{},
failed: map[string]struct{}{},
}
for _, layer := range tree {
for _, k := range layer {
r.succeeded[k] = struct{}{}
}
}
return r
}
func (r *deprecatedResultTracker) Skipped(k string) {
r.Lock()
delete(r.succeeded, k)
r.skipped[k] = struct{}{}
r.Unlock()
}
func (r *deprecatedResultTracker) Failed(k string) {
r.Lock()
delete(r.succeeded, k)
delete(r.skipped, k)
r.failed[k] = struct{}{}
r.Unlock()
}
func (r *deprecatedResultTracker) ToSlices() (succeeded, skipped, failed []string) {
r.Lock()
succeeded = make([]string, 0, len(r.succeeded))
skipped = make([]string, 0, len(r.skipped))
failed = make([]string, 0, len(r.failed))
for k := range r.succeeded {
succeeded = append(succeeded, k)
}
sort.Strings(succeeded)
for k := range r.skipped {
skipped = append(skipped, k)
}
sort.Strings(skipped)
for k := range r.failed {
failed = append(failed, k)
}
sort.Strings(failed)
r.Unlock()
return
}
// Returns a map of enrichment IDs that should be skipped for this payload.
func (w *workflowDeprecated) skipFromMeta(root interface{}) map[string]struct{} {
skipList := map[string]struct{}{}
if len(w.metaPath) == 0 {
return skipList
}
gObj := gabs.Wrap(root)
// If a whitelist is provided for this flow then skip stages that aren't
// within it.
if apply, ok := gObj.S(append(w.metaPath, "apply")...).Data().([]interface{}); ok {
if len(apply) > 0 {
for k := range w.allStages {
skipList[k] = struct{}{}
}
for _, id := range apply {
if idStr, isString := id.(string); isString {
delete(skipList, idStr)
}
}
}
}
// Skip stages that already succeeded in a previous run of this workflow.
if succeeded, ok := gObj.S(append(w.metaPath, "succeeded")...).Data().([]interface{}); ok {
for _, id := range succeeded {
if idStr, isString := id.(string); isString {
if _, exists := w.allStages[idStr]; exists {
skipList[idStr] = struct{}{}
}
}
}
}
// Skip stages that were already skipped in a previous run of this workflow.
if skipped, ok := gObj.S(append(w.metaPath, "skipped")...).Data().([]interface{}); ok {
for _, id := range skipped {
if idStr, isString := id.(string); isString {
if _, exists := w.allStages[idStr]; exists {
skipList[idStr] = struct{}{}
}
}
}
}
return skipList
}
// ProcessMessage applies workflow stages to each part of a message type.
func (w *workflowDeprecated) ProcessMessage(msg types.Message) ([]types.Message, types.Response) {
w.mCount.Incr(1)
skipOnMeta := make([]map[string]struct{}, msg.Len())
payload := msg.DeepCopy()
payload.Iter(func(i int, p types.Part) error {
p.Get()
p.Metadata()
if jObj, err := p.JSON(); err == nil {
skipOnMeta[i] = w.skipFromMeta(jObj)
} else {
skipOnMeta[i] = map[string]struct{}{}
}
return nil
})
propMsg, _ := tracing.WithChildSpans("workflow", payload)
records := make([]*deprecatedResultTracker, payload.Len())
for i := range records {
records[i] = deprecatedTrackerFromTree(w.dag)
}
for _, layer := range w.dag {
results := make([]types.Message, len(layer))
errors := make([]error, len(layer))
wg := sync.WaitGroup{}
wg.Add(len(layer))
for i, eid := range layer {
go func(id string, index int) {
msgCopy := propMsg.Copy()
msgCopy.Iter(func(partIndex int, p types.Part) error {
if _, exists := skipOnMeta[partIndex][id]; exists {
p.Set(nil)
}
return nil
})
var resSpans []*tracing.Span
results[index], resSpans = tracing.WithChildSpans(id, msgCopy)
errors[index] = w.children[id].CreateResult(results[index])
for _, s := range resSpans {
s.Finish()
}
results[index].Iter(func(j int, p types.Part) error {
if p.IsEmpty() {
records[j].Skipped(id)
}
if HasFailed(p) {
records[j].Failed(id)
p.Set(nil)
}
return nil
})
wg.Done()
}(eid, i)
}
wg.Wait()
for i, id := range layer {
var failed []int
err := errors[i]
if err == nil {
if failed, err = w.children[id].OverlayResult(payload, results[i]); err != nil {
w.mErrOverlay.Incr(1)
}
}
if err != nil {
w.incrStageErr(id)
w.mErr.Incr(1)
w.log.Errorf("Failed to perform enrichment '%v': %v\n", id, err)
for j := range records {
records[j].Failed(id)
}
continue
}
for _, j := range failed {
records[j].Failed(id)
}
w.incrStageSucc(id)
}
}
// Finally, set the meta records of each document.
if len(w.metaPath) > 0 {
payload.Iter(func(i int, p types.Part) error {
pJSON, err := p.JSON()
if err != nil {
w.mErr.Incr(1)
w.mErrMeta.Incr(1)
w.log.Errorf("Failed to parse message for meta update: %v\n", err)
return nil
}
gObj := gabs.Wrap(pJSON)
if oldRecord := gObj.S(w.metaPath...).Data(); oldRecord != nil {
gObj.Delete(w.metaPath...)
gObj.Set(oldRecord, append(w.metaPath, "previous")...)
}
succStrs, skipStrs, failStrs := records[i].ToSlices()
succeeded := make([]interface{}, len(succStrs))
skipped := make([]interface{}, len(skipStrs))
failed := make([]interface{}, len(failStrs))
for j, v := range succStrs {
succeeded[j] = v
}
for j, v := range skipStrs {
skipped[j] = v
}
for j, v := range failStrs {
failed[j] = v
}
gObj.Set(succeeded, append(w.metaPath, "succeeded")...)
gObj.Set(skipped, append(w.metaPath, "skipped")...)
gObj.Set(failed, append(w.metaPath, "failed")...)
p.SetJSON(gObj.Data())
return nil
})
}
tracing.FinishSpans(propMsg)
w.mSentParts.Incr(int64(payload.Len()))
w.mSent.Incr(1)
msgs := [1]types.Message{payload}
return msgs[:], nil
}
// CloseAsync shuts down the processor and stops processing requests.
func (w *workflowDeprecated) CloseAsync() {
for _, c := range w.children {
c.CloseAsync()
}
}
// WaitForClose blocks until the processor has closed down.
func (w *workflowDeprecated) WaitForClose(timeout time.Duration) error {
stopBy := time.Now().Add(timeout)
for _, c := range w.children {
if err := c.WaitForClose(time.Until(stopBy)); err != nil {
return err
}
}
return nil
}
//------------------------------------------------------------------------------