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mode.go
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mode.go
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// Copyright (C) 2016-2018 vLife Systems Ltd <http://vlifesystems.com>
// Licensed under an MIT licence. Please see LICENSE.md for details.
package experiment
import (
"errors"
"fmt"
"os"
"path/filepath"
"sync"
"time"
"github.com/lawrencewoodman/ddataset"
"github.com/lawrencewoodman/ddataset/dcopy"
"github.com/lawrencewoodman/ddataset/dcsv"
"github.com/lawrencewoodman/ddataset/dsql"
"github.com/lawrencewoodman/ddataset/dtruncate"
"github.com/lawrencewoodman/dexpr"
"github.com/vlifesystems/rhkit/aggregator"
"github.com/vlifesystems/rhkit/assessment"
"github.com/vlifesystems/rhkit/goal"
"github.com/vlifesystems/rhkit/rule"
"github.com/vlifesystems/rulehunter/config"
"github.com/vlifesystems/rulehunter/fileinfo"
"github.com/vlifesystems/rulehunter/progress"
"github.com/vlifesystems/rulehunter/quitter"
"github.com/vlifesystems/rulehunter/report"
)
type Mode interface {
// Kind returns the report type of the mode
Kind() report.ModeKind
Dataset() ddataset.Dataset
Release() error
NumAssessRulesStages() int
}
type datasetDesc struct {
CSV *csvDesc `yaml:"csv"`
SQL *sqlDesc `yaml:"sql"`
Fields []string `yaml:"fields"`
}
type csvDesc struct {
Filename string `yaml:"filename"`
HasHeader bool `yaml:"hasHeader"`
Separator string `yaml:"separator"`
}
type sqlDesc struct {
DriverName string `yaml:"driverName"`
DataSourceName string `yaml:"dataSourceName"`
Query string `yaml:"query"`
}
type InvalidWhenExprError string
func (e InvalidWhenExprError) Error() string {
return "when field invalid: " + string(e)
}
func makeDataset(
cfg *config.Config,
dd *datasetDesc,
) (ddataset.Dataset, error) {
// File mode permission:
// No special permission bits
// User: Read, Write Execute
// Group: None
// Other: None
const modePerm = 0700
var dataset ddataset.Dataset
if dd.CSV != nil && dd.SQL != nil {
return nil, errors.New("can't specify csv and sql source")
}
if dd.CSV == nil && dd.SQL == nil {
return nil,
errors.New("has no csv or sql field")
}
if dd.CSV != nil {
if dd.CSV.Filename == "" {
return nil, errors.New("csv: missing filename")
}
if dd.CSV.Separator == "" {
return nil, errors.New("csv: missing separator")
}
dataset = dcsv.New(
dd.CSV.Filename,
dd.CSV.HasHeader,
rune(dd.CSV.Separator[0]),
dd.Fields,
)
} else if dd.SQL != nil {
if dd.SQL.DriverName == "" {
return nil, errors.New("sql: missing driverName")
}
if dd.SQL.DataSourceName == "" {
return nil, errors.New("sql: missing dataSourceName")
}
if dd.SQL.Query == "" {
return nil, errors.New("sql: missing query")
}
sqlHandler, err := newSQLHandler(
dd.SQL.DriverName,
dd.SQL.DataSourceName,
dd.SQL.Query,
)
if err != nil {
return nil, fmt.Errorf("sql: %s", err)
}
dataset = dsql.New(sqlHandler, dd.Fields)
}
if cfg.MaxNumRecords >= 1 {
dataset = dtruncate.New(dataset, cfg.MaxNumRecords)
}
// Copy dataset to get stable version
buildTmpDir := filepath.Join(cfg.BuildDir, "tmp")
if err := os.MkdirAll(buildTmpDir, modePerm); err != nil {
return nil, err
}
copyDataset, err := dcopy.New(dataset, buildTmpDir)
if err != nil {
return nil, err
}
return copyDataset, nil
}
func startWorkers(
wg *sync.WaitGroup,
cfg *config.Config,
aggregators []aggregator.Spec,
goals []*goal.Goal,
rules []rule.Rule,
) (
[]*assessment.Assessment,
[]chan ddataset.Record,
chan error,
) {
numRules := len(rules)
assessments := []*assessment.Assessment{}
records := []chan ddataset.Record{}
errors := make(chan error, cfg.MaxNumProcesses+1)
ruleStep := numRules / cfg.MaxNumProcesses
if ruleStep < cfg.MaxNumProcesses {
ruleStep = cfg.MaxNumProcesses
}
for i := 0; i < numRules; i += ruleStep {
nextI := i + ruleStep
if nextI > numRules {
nextI = numRules
}
a := assessment.New(aggregators, goals)
a.AddRules(append(rules[i:nextI], rule.NewTrue()))
assessments = append(assessments, a)
recordC := make(chan ddataset.Record, 100)
records = append(records, recordC)
// wg.Add here because sometimes wg.Wait() called before all
// the goroutines had started
wg.Add(1)
go assessRulesWorker(wg, a, recordC, errors)
}
return assessments, records, errors
}
func sendRecordsToWorkers(
wg *sync.WaitGroup,
q *quitter.Quitter,
reportProgress func(int64, int64) error,
records []chan ddataset.Record,
errors chan error,
dataset ddataset.Dataset,
) error {
const progressIntervals = int64(100)
reportNumRecords := dataset.NumRecords() / progressIntervals
if reportNumRecords == 0 {
reportNumRecords = 1
}
conn, err := dataset.Open()
if err != nil {
return err
}
defer conn.Close()
recordNum := int64(0)
for conn.Next() {
select {
case <-q.C:
return ErrQuitReceived
case err := <-errors:
return err
default:
break
}
record := conn.Read().Clone()
for _, r := range records {
r <- record
}
recordNum++
if recordNum == 0 || recordNum%reportNumRecords == 0 {
if err := reportProgress(recordNum, dataset.NumRecords()); err != nil {
return err
}
}
}
return conn.Err()
}
func assessRules(
e *Experiment,
m Mode,
stage int,
rules []rule.Rule,
pm *progress.Monitor,
q *quitter.Quitter,
cfg *config.Config,
) (*assessment.Assessment, error) {
const subRulesStep = 1000
var wg sync.WaitGroup
var result *assessment.Assessment
processSubRules := func(ruleProgress float64, subRules []rule.Rule) (
*assessment.Assessment,
error,
) {
prevMsg := ""
prevProgress := 0.0
reportProgress := func(recordNum, numRecords int64) error {
msg :=
fmt.Sprintf("Assessing rules %d/%d", stage, m.NumAssessRulesStages())
progress :=
100.0*ruleProgress - 1 + float64(recordNum)/float64(numRecords)
if msg != prevMsg || progress-prevProgress >= 0.5 {
prevMsg = msg
prevProgress = progress
return pm.ReportProgress(
e.File.Name(),
m.Kind(),
msg,
progress,
)
}
return nil
}
assessments, records, errors :=
startWorkers(&wg, cfg, e.Aggregators, e.Goals, subRules)
err := sendRecordsToWorkers(
&wg,
q,
reportProgress,
records,
errors,
m.Dataset(),
)
// We have finished with records and errors now, so it makes sense
// to close these channels and wait for the goroutines to finish
for _, r := range records {
close(r)
}
wg.Wait()
select {
case errs := <-errors:
return nil, errs
default:
close(errors)
break
}
if err != nil {
return nil, err
}
subResult := assessments[0]
for _, a := range assessments[1:] {
subResult, err = subResult.Merge(a)
if err != nil {
return nil, err
}
}
subResult.Sort(e.SortOrder)
subResult.Refine()
return subResult, nil
}
if stage > m.NumAssessRulesStages() {
panic("assessRules: stage > assessRulesNumStages")
}
if len(rules) == 0 {
rules = []rule.Rule{rule.NewTrue()}
}
for i := 0; i < len(rules); i += subRulesStep {
endI := i + subRulesStep
if endI > len(rules) {
endI = len(rules)
}
ruleProgress := float64(endI) / float64(len(rules))
subRules := rules[i:endI]
subRules = append(subRules, rule.NewTrue())
newAss, err := processSubRules(ruleProgress, subRules)
if err != nil {
return nil, err
}
if i == 0 {
result = newAss
} else {
result, err = result.Merge(newAss)
if err != nil {
return nil, err
}
}
}
result.Sort(e.SortOrder)
result.Refine()
return result, nil
}
func assessRulesWorker(
wg *sync.WaitGroup,
ass *assessment.Assessment,
records <-chan ddataset.Record,
errors chan<- error,
) {
defer wg.Done()
for r := range records {
if err := ass.ProcessRecord(r); err != nil {
errors <- err
return
}
}
if err := ass.Update(); err != nil {
errors <- err
}
}
func shouldProcessMode(
when *dexpr.Expr,
file fileinfo.FileInfo,
isFinished bool,
pmStamp time.Time,
) (bool, error) {
if isFinished && file.ModTime().After(pmStamp) {
isFinished, pmStamp = false, time.Now()
}
return evalWhenExpr(time.Now(), isFinished, pmStamp, when)
}