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How to use mgrKey method of main Package

Best Syzkaller code snippet using main.mgrKey

entities.go

Source:entities.go

...235	BisectPending236	BisectError237	BisectYes238)239func mgrKey(c context.Context, ns, name string) *db.Key {240	return db.NewKey(c, "Manager", fmt.Sprintf("%v-%v", ns, name), 0, nil)241}242func (mgr *Manager) key(c context.Context) *db.Key {243	return mgrKey(c, mgr.Namespace, mgr.Name)244}245func loadManager(c context.Context, ns, name string) (*Manager, error) {246	mgr := new(Manager)247	if err := db.Get(c, mgrKey(c, ns, name), mgr); err != nil {248		if err != db.ErrNoSuchEntity {249			return nil, fmt.Errorf("failed to get manager %v/%v: %v", ns, name, err)250		}251		mgr = &Manager{252			Namespace: ns,253			Name:      name,254		}255	}256	return mgr, nil257}258// updateManager does transactional compare-and-swap on the manager and its current stats.259func updateManager(c context.Context, ns, name string, fn func(mgr *Manager, stats *ManagerStats) error) error {260	date := timeDate(timeNow(c))261	tx := func(c context.Context) error {262		mgr, err := loadManager(c, ns, name)263		if err != nil {264			return err265		}266		mgrKey := mgr.key(c)267		stats := new(ManagerStats)268		statsKey := db.NewKey(c, "ManagerStats", "", int64(date), mgrKey)269		if err := db.Get(c, statsKey, stats); err != nil {270			if err != db.ErrNoSuchEntity {271				return fmt.Errorf("failed to get stats %v/%v/%v: %v", ns, name, date, err)272			}273			stats = &ManagerStats{274				Date: date,275			}276		}277		if err := fn(mgr, stats); err != nil {278			return err279		}280		if _, err := db.Put(c, mgrKey, mgr); err != nil {281			return fmt.Errorf("failed to put manager: %v", err)282		}283		if _, err := db.Put(c, statsKey, stats); err != nil {284			return fmt.Errorf("failed to put manager stats: %v", err)285		}286		return nil287	}288	return db.RunInTransaction(c, tx, &db.TransactionOptions{Attempts: 10})289}290func loadAllManagers(c context.Context, ns string) ([]*Manager, []*db.Key, error) {291	var managers []*Manager292	query := db.NewQuery("Manager")293	if ns != "" {294		query = query.Filter("Namespace=", ns)...

main.go

Source:main.go

1package main2import (3	"context"4	"fmt"5	"sync"6	"log-sample/logconfig"7	"log-sample/logtailf"8	"github.com/spf13/viper"9)10var mainOnce sync.Once11var configMgr map[string]*logconfig.ConfigData12// ConstructMgr æ§å¶èåæèµæºææï¼13// å¹¶ä¸éè¿ConstructMgrå¨å±å½æ°æé configMgrè¿æ ·çmapè®°å½ææ°çéç½®ä¿¡æ¯ã14func ConstructMgr(configPaths interface{}, keyChan chan string) {15	configDatas := configPaths.(map[string]interface{})16	for conkey, confval := range configDatas {17		fmt.Println("conkey:", conkey)18		fmt.Println("conval:", confval)19		configData := new(logconfig.ConfigData)20		configData.ConfigKey = conkey21		configData.ConfigValue = confval.(string)22		ctx, cancel := context.WithCancel(context.Background())23		configData.ConfigCancel = cancel24		configMgr[conkey] = configData25		// æ·»å åç¨å¯å¨é»è¾ï¼å°åç¨çctxä¿åå¨mapä¸ï¼è¿æ ·ä½åç¨å¯ä»¥æ ¹æ®çæ´æ°26		// å¯å¨åå³éè¿ä¸ªåç¨27		go logtailf.WatchLogFile(conkey, configData.ConfigValue, ctx, keyChan)28	}29}30func main() {31	v := viper.New()32	configPaths, confres := logconfig.ReadConfig(v)33	if configPaths == nil || !confres {34		fmt.Println("read config failed")35		return36	}37	KEYCHANSIZE := 138	keyChan := make(chan string, KEYCHANSIZE)39	configMgr = make(map[string]*logconfig.ConfigData)40	ConstructMgr(configPaths, keyChan)41	ctx, cancel := context.WithCancel(context.Background())42	pathChan := make(chan interface{})43	go logconfig.WatchConfig(ctx, v, pathChan)44	defer func() { //ææå½æ°45		mainOnce.Do(func() {46			if err := recover(); err != nil {47				fmt.Println("main gorroutine panic ", err)48			}49			cancel()50			for _, oldval := range configMgr {51				oldval.ConfigCancel()52			}53			configMgr = nil54		})55	}()56	for {57		select {58		case pathData, ok := <-pathChan:59			if !ok {60				return61			}62			fmt.Println("main goroutine reveive pathData")63			fmt.Println(pathData)64			pathDataNew := pathData.(map[string]interface{}) // golang Type Assertion, ç±»åæè¨65			for oldkey, oldval := range configMgr {66				_, ok := pathDataNew[oldkey]67				if ok {68					continue69				}70				oldval.ConfigCancel()71				delete(configMgr, oldkey)72			}73			for conkey, conval := range pathDataNew {74				oldval, ok := configMgr[conkey]75				if !ok {76					configData := new(logconfig.ConfigData)77					configData.ConfigKey = conkey78					configData.ConfigValue = conval.(string)79					ctx, cancel := context.WithCancel(context.Background())80					configData.ConfigCancel = cancel81					configMgr[conkey] = configData82					fmt.Println(conval.(string))83					go logtailf.WatchLogFile(conkey, configData.ConfigValue, ctx, keyChan)84					continue85				}86				if oldval.ConfigValue != conval.(string) {87					oldval.ConfigValue = conval.(string)88					oldval.ConfigCancel()89					ctx, cancel := context.WithCancel(context.Background())90					oldval.ConfigCancel = cancel91					go logtailf.WatchLogFile(conkey, conval.(string), ctx, keyChan)92					continue93				}94			}95			for mgrkey, mgrval := range configMgr {96				fmt.Println(mgrkey)97				fmt.Println(mgrval)98			}99		case keystr := <-keyChan:100			val, ok := configMgr[keystr]101			if !ok {102				print("get keystr filed")103				continue104			}105			fmt.Println("recover goroutine watch ", keystr)106			var ctxcover context.Context107			ctxcover, val.ConfigCancel = context.WithCancel(context.Background())108			go logtailf.WatchLogFile(keystr, val.ConfigValue, ctxcover, keyChan)109		}110	}111}...

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