How to use worker method of main Package

Best Syzkaller code snippet using main.worker

worker.go

Source:worker.go Github

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2import (3 "fmt"4 "runtime/debug"5 "time"6 libworker "github.com/appscode/g2/worker"7)8type worker struct {9 id string10 what string11 worker *libworker.Worker12 activeJobs int13 config *configurationStruct14 mainWorker *mainWorker15}16// creates a new worker and returns a pointer to it17func newWorker(what string, configuration *configurationStruct, mainWorker *mainWorker) *worker {18 logger.Tracef("starting new %sworker", what)19 worker := &worker{20 what: what,21 activeJobs: 0,22 config: configuration,23 mainWorker: mainWorker,24 }25 worker.id = fmt.Sprintf("%p", worker)26 w := libworker.New(libworker.OneByOne)27 worker.worker = w28 w.ErrorHandler = func(e error) {29 worker.errorHandler(e)30 }31 worker.registerFunctions(configuration)32 // listen to this servers33 servers := mainWorker.ActiveServerList()34 if len(servers) == 0 {35 return nil36 }37 for _, address := range servers {38 status := worker.mainWorker.GetServerStatus(address)39 if status != "" {40 continue41 }42 err := w.AddServer("tcp", address)43 if err != nil {44 worker.mainWorker.SetServerStatus(address, err.Error())45 return nil46 }47 }48 // check if worker is ready49 if err := w.Ready(); err != nil {50 logger.Debugf("worker not ready closing again: %s", err.Error())51 worker.Shutdown()52 return nil53 }54 // start the worker55 go func() {56 defer logPanicExit()57 w.Work()58 }()59 return worker60}61func (worker *worker) registerFunctions(configuration *configurationStruct) {62 w := worker.worker63 // specifies what events the worker listens64 switch worker.what {65 case "check":66 if worker.config.eventhandler {67 w.AddFunc("eventhandler", worker.doWork, libworker.Unlimited)68 }69 if worker.config.hosts {70 w.AddFunc("host", worker.doWork, libworker.Unlimited)71 }72 if worker.config.services {73 w.AddFunc("service", worker.doWork, libworker.Unlimited)74 }75 if worker.config.notifications {76 w.AddFunc("notification", worker.doWork, libworker.Unlimited)77 }78 // register for the hostgroups79 if len(worker.config.hostgroups) > 0 {80 for _, element := range worker.config.hostgroups {81 w.AddFunc("hostgroup_"+element, worker.doWork, libworker.Unlimited)82 }83 }84 // register for servicegroups85 if len(worker.config.servicegroups) > 0 {86 for _, element := range worker.config.servicegroups {87 w.AddFunc("servicegroup_"+element, worker.doWork, libworker.Unlimited)88 }89 }90 case "status":91 statusQueue := fmt.Sprintf("worker_%s", configuration.identifier)92 w.AddFunc(statusQueue, worker.returnStatus, libworker.Unlimited)93 default:94 logger.Panicf("type not implemented: %s", worker.what)95 }96}97func (worker *worker) doWork(job libworker.Job) (res []byte, err error) {98 res = []byte("OK")99 logger.Tracef("worker got a job: %s", job.Handle())100 worker.activeJobs++101 received, err := decrypt((decodeBase64(string(job.Data()))), worker.config.encryption)102 if err != nil {103 logger.Errorf("decrypt failed: %s", err.Error())104 worker.activeJobs--105 return106 }107 taskCounter.WithLabelValues(received.typ).Inc()108 worker.mainWorker.tasks++109 logger.Debugf("incoming %s job: handle: %s - host: %s - service: %s", received.typ, job.Handle(), received.hostName, received.serviceDescription)110 logger.Trace(received)111 if !worker.considerBalooning() {112 worker.executeJob(received)113 worker.activeJobs--114 return115 }116 finChan := make(chan bool, 1)117 go func() {118 worker.executeJob(received)119 worker.activeJobs--120 if received.ballooning {121 worker.mainWorker.curBalooningWorker--122 balooningWorkerCount.Set(float64(worker.mainWorker.curBalooningWorker))123 }124 finChan <- true125 }()126 ticker := time.NewTicker(time.Duration(worker.config.backgroundingThreshold) * time.Second)127 defer ticker.Stop()128 for {129 select {130 case <-finChan:131 logger.Debugf("job: %s finished", job.Handle())132 return133 case <-ticker.C:134 // check again if are there open files left for balooning135 if worker.startBalooning() {136 logger.Debugf("job: %s runs for more than %d seconds, backgrounding...", job.Handle(), worker.config.backgroundingThreshold)137 worker.mainWorker.curBalooningWorker++138 balooningWorkerCount.Set(float64(worker.mainWorker.curBalooningWorker))139 received.ballooning = true140 return141 }142 }143 }144}145// considerBalooning returns true if balooning is enabled and threshold is reached146func (worker *worker) considerBalooning() bool {147 if worker.config.backgroundingThreshold <= 0 {148 return false149 }150 // only if 70% of our workers are utilized151 if worker.mainWorker.workerUtilization < BalooningUtilizationThreshold {152 return false153 }154 return true155}156// startBalooning returns true if conditions for balooning are met (backgrounding jobs after backgroundingThreshold of seconds)157func (worker *worker) startBalooning() bool {158 if worker.config.backgroundingThreshold <= 0 {159 return false160 }161 if !worker.mainWorker.checkLoads() {162 return false163 }164 if !worker.mainWorker.checkMemory() {165 return false166 }167 // only if 70% of our workers are utilized168 if worker.mainWorker.workerUtilization < BalooningUtilizationThreshold {169 return false170 }171 // are there open files left for balooning172 if worker.mainWorker.curBalooningWorker >= (worker.mainWorker.maxPossibleWorker - worker.config.maxWorker) {173 return false174 }175 logger.Debugf("balooning: cur: %d max: %d", worker.mainWorker.curBalooningWorker, (worker.mainWorker.maxPossibleWorker - worker.config.maxWorker))176 return true177}178// executeJob executes the job and handles sending the result179func (worker *worker) executeJob(received *receivedStruct) {180 result := readAndExecute(received, worker.config)181 if result.returnCode > 0 {182 errorCounter.WithLabelValues(received.typ).Inc()183 }184 if received.resultQueue != "" {185 logger.Tracef("result:\n%s", result)186 enqueueServerResult(result)187 enqueueDupServerResult(worker.config, result)188 }189}190// errorHandler gets called if the libworker worker throws an error191func (worker *worker) errorHandler(e error) {192 switch err := e.(type) {193 case *libworker.WorkerDisconnectError:194 _, addr := err.Server()195 logger.Debugf("worker disconnect: %s from %s", e.Error(), addr)196 worker.mainWorker.SetServerStatus(addr, err.Error())197 default:198 logger.Errorf("worker error: %s", e.Error())199 logger.Errorf("%s", debug.Stack())200 }201 worker.Shutdown()202}203// Shutdown and deregister this worker204func (worker *worker) Shutdown() {205 logger.Debugf("worker shutting down")206 defer func() {207 if worker.mainWorker != nil && worker.mainWorker.running {208 worker.mainWorker.unregisterWorker(worker)209 }210 }()211 if worker.worker != nil {212 worker.worker.ErrorHandler = nil213 if worker.activeJobs > 0 {214 // try to stop gracefully215 worker.worker.Shutdown()216 }217 if worker.worker != nil {218 worker.worker.Close()219 }220 }221 worker.worker = nil222}...

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worker_pool_test.go

Source:worker_pool_test.go Github

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...6 "time"7)8/*9 Worker Pool10 worker pool 指的是有許多的 goroutines 同步的進行一個工作。要建立 worker pool，會先建立許多的 worker goroutine，11 這些 goroutine 中會：12 進行相同的 job13 有兩個 channel，一個用來接受任務（task channel），一個用來回傳結果（result channel）14 都等待 task channel 傳來要進行的 tasks15 一但收到 tasks 就可以做事並透過 result channel 回傳結果16*/17// 程式來源：https://medium.com/rungo/anatomy-of-channels-in-go-concurrency-in-go-1ec336086adb18// STEP 3：在 worker goroutines 中會做相同的工作19// tasks is receive only channel20// results is send only channel21func sqrWorker(tasks <-chan int, results chan<- int, instance int) {22 // 一旦收到 tasks channel 傳來資料，就可以動工並回傳結果23 for num := range tasks {24 time.Sleep(500 * time.Millisecond) // 模擬會阻塞的任務25 fmt.Printf("[worker %v] Sending result of task %v \n", instance, num)26 results <- num * num27 }28}29func TestWorkerPool(t *testing.T) {30 fmt.Println("[main] main() started")31 // STEP 1：建立兩個 channel，一個用來傳送 tasks，一個用來接收 results32 tasks := make(chan int, 10)33 results := make(chan int, 10)34 // STEP 2 啟動三個不同的 worker goroutines35 for i := 1; i <= 3; i++ {36 go sqrWorker(tasks, results, i)37 }38 // STEP 4：發送 5 個不同的任務39 for i := 1; i <= 5; i++ {40 tasks <- i // non-blocking（因為 buffered channel 的 capacity 是 10）41 }42 fmt.Println("[main] Wrote 5 tasks")43 // STEP 5：發送完任務後把 channel 關閉（非必要，但可減少 bug）44 close(tasks)45 // STEP 6：等待各個 worker 從 result channel 回傳結果46 for i := 1; i <= 5; i++ {47 result := <-results // blocking（因為 buffer 是空的）48 fmt.Println("[main] Result", i, ":", result)49 }50 fmt.Println("[main] main() stopped")51 // 當所有 worker 都剛好 blocking 的時候，控制權就會交回 main goroutine，這時候就可以立即看到計算好的結果。52 53 /*54 [main] main() started55 [main] Wrote 5 tasks56 [worker 1] Sending result of task 157 [worker 3] Sending result of task 358 [main] Result 1 : 159 [main] Result 2 : 960 [worker 2] Sending result of task 261 [main] Result 3 : 462 [worker 3] Sending result of task 563 [worker 1] Sending result of task 464 [main] Result 4 : 2565 [main] Result 5 : 1666 [main] main() stopped67 */68}69// ------------------------------- WorkerGroup 搭配 WaitGroup ---------------------------------70// 但有些時候，我們希望所有的 tasks 都執行完後才讓 main goroutine 繼續往後做，這時候可以搭配 WaitGroup 使用：71// 這時會等到所有的 worker 都完工下班後，才開始輸出計算好的結果。72// 搭配 WaitGroup 的好處是可以等到所有 worker 都完工後還讓程式繼續，但相對的會需要花更長的時間在等待所有人完工：73func sqrWorker2(wg *sync.WaitGroup, tasks <-chan int, results chan<- int, instance int) {74 defer wg.Done()75 // 一旦收到 tasks channel 傳來資料，就可以動工並回傳結果76 // read from chan tasks77 for num := range tasks {78 time.Sleep(500 * time.Millisecond) // 模擬會阻塞的任務79 fmt.Printf("[worker %v] Sending result of task %v \n", instance, num)80 results <- num * num81 }82}83func TestWorkerPoolWithWaitGroup(t *testing.T) {84 fmt.Println("[main] main() started")85 var wg sync.WaitGroup86 tasks := make(chan int, 10)87 results := make(chan int, 10)88 for i := 1; i <= 3; i++ {89 wg.Add(1)90 go sqrWorker2(&wg, tasks, results, i)91 }92 for i := 1; i <= 5; i++ {93 tasks <- i // non-blocking（因為 buffered channel 的 capacity 是 10）94 }95 fmt.Println("[main] Wrote 5 tasks")96 close(tasks) // 有用 waitGroup 的話這個 close 不能省略97 // 直到所有的 worker goroutine 把所有 tasks 都做完後才繼續往後98 wg.Wait()99 for i := 1; i <= 5; i++ {100 result := <-results // blocking（因為 buffer 是空的）101 fmt.Println("[main] Result", i, ":", result)102 }103 fmt.Println("[main] main() stopped")104 /*105 [main] main() started106 [main] Wrote 5 tasks107 [worker 3] Sending result of task 3108 [worker 2] Sending result of task 2109 [worker 1] Sending result of task 1110 [worker 3] Sending result of task 4111 [worker 2] Sending result of task 5112 [main] Result 1 : 9113 [main] Result 2 : 4114 [main] Result 3 : 1115 [main] Result 4 : 16116 [main] Result 5 : 25117 [main] main() stopped118 */119}...

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service.go

Source:service.go Github

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...40}41// Main is42func (s *Service) Main() {43 subproc := func() {44 worker := s.c.AccountSummary.SubProcessWorker45 if worker <= 0 {46 worker = 147 }48 log.Info("Starting sub process with %d workers", worker)49 for i := uint64(0); i < worker; i++ {50 go s.memberBinLogproc(context.Background())51 go s.blockBinLogproc(context.Background())52 go s.passportBinLogproc(context.Background())53 go s.relationBinLogproc(context.Background())54 }55 }56 syncrange := func() {57 start := s.c.AccountSummary.SyncRangeStart58 if start <= 0 {59 start = 160 }61 end := s.c.AccountSummary.SyncRangeEnd62 if end <= 0 {63 end = 164 }65 worker := s.c.AccountSummary.SyncRangeWorker66 if worker <= 0 {67 worker = 168 }69 go s.syncRangeproc(context.Background(), start, end, worker)70 }71 // initial := func() {72 // go s.initialproc(context.Background())73 // }74 if !s.c.FeatureGate.DisableSubProcess {75 subproc()76 }77 if s.c.FeatureGate.SyncRange {78 syncrange()79 }80 // if s.c.FeatureGate.Initial {81 // initial()82 // }83}...

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worker

Using AI Code Generation

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1import (2func worker(id int, jobs <-chan int, results chan<- int) {3 for j := range jobs {4 fmt.Println("worker", id, "started job", j)5 time.Sleep(time.Second)6 fmt.Println("worker", id, "finished job", j)7 }8}9func main() {10 jobs := make(chan int, 100)11 results := make(chan int, 100)12 for w := 1; w <= 3; w++ {13 go worker(w, jobs, results)14 }15 for j := 1; j <= 9; j++ {16 }17 close(jobs)18 for a := 1; a <= 9; a++ {19 }20}21go function_name()22import (23func worker(id int, jobs <-chan int, results chan<- int) {24 for j := range jobs {25 fmt.Println("worker", id, "started job", j)26 time.Sleep(time.Second)27 fmt.Println("worker", id,

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worker

Using AI Code Generation

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1type Worker struct {2}3func doWork(id int, w Worker) {4 for n := range w.in {5 fmt.Printf("Worker %d received %c6 }7}8func createWorker(id int) Worker {9 w := Worker{10 in: make(chan int),11 done: make(chan bool),12 }13 go doWork(id, w)14}15func chanDemo() {16 for i := 0; i < 10; i++ {17 workers[i] = createWorker(i)18 }19 for i, worker := range workers {20 }21 for _, worker := range workers {22 }23 for i, worker := range workers {24 }25 for _, worker := range workers {26 }27}28func main() {29 chanDemo()30}31type Worker struct {32}33func doWork(id int, c chan int, done chan bool) {34 for n := range c {35 fmt.Printf("Worker %d received %c36 }37}38func createWorker(id int) Worker {39 w := Worker{40 in: make(chan int),41 done: make(chan bool),42 }43 go doWork(id, w.in, w.done)44}45func chanDemo() {46 for i := 0; i < 10; i++ {

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worker

Using AI Code Generation

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1import (2func main() {3 runtime.GOMAXPROCS(1)4 wg.Add(2)5 fmt.Println("Starting Goroutines")6 go func() {7 defer wg.Done()8 for count := 0; count < 3; count++ {9 for char := 'a'; char < 'a'+26; char++ {10 fmt.Printf("%c ", char)11 }12 }13 }()14 go func() {15 defer wg.Done()16 for count := 0; count < 3; count++ {17 for char := 'A'; char < 'A'+26; char++ {18 fmt.Printf("%c ", char)19 }20 }21 }()22 fmt.Println("Waiting To Finish")23 wg.Wait()24 fmt.Println("\nTerminating Program")25}

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worker

Using AI Code Generation

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1import (2func main() {3 worker.Worker()4 fmt.Println("Hello World")5}6import "fmt"7func Worker() {8 fmt.Println("I am worker")9}

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worker

Using AI Code Generation

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1func main() {2 worker := main.Worker{}3 fmt.Println(worker.Worker())4}5func main() {6 worker := main.Worker{}7 fmt.Println(worker.Worker())8}9func main() {10 worker := main.Worker{}11 fmt.Println(worker.Worker())12}13func main() {14 worker := main.Worker{}15 fmt.Println(worker.Worker())16}17func main() {18 worker := main.Worker{}19 fmt.Println(worker.Worker())20}21func main() {22 worker := main.Worker{}23 fmt.Println(worker.Worker())24}25func main() {26 worker := main.Worker{}27 fmt.Println(worker.Worker())28}29func main() {30 worker := main.Worker{}31 fmt.Println(worker.Worker())32}33func main() {34 worker := main.Worker{}35 fmt.Println(worker.Worker())36}37func main() {38 worker := main.Worker{}39 fmt.Println(worker.Worker())40}41func main() {42 worker := main.Worker{}43 fmt.Println(worker.Worker())44}45func main() {46 worker := main.Worker{}47 fmt.Println(worker.Worker())48}49func main() {50 worker := main.Worker{}51 fmt.Println(worker.Worker())52}53func main() {54 worker := main.Worker{}55 fmt.Println(worker.Worker())56}

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worker

Using AI Code Generation

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1import (2func main() {3 fmt.Println("Hello, playground")4 worker.Worker()5}6import (7func Worker() {8 fmt.Println("Hello, worker")9}10 /usr/local/go/src/main/worker (from $GOROOT)11 /Users/xxx/go/src/main/worker (from $GOPATH)12import "fmt"13func main() {14 fmt.Println("Hello, playground")15}16× Email codedump link for Go: How to import package from different directory

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worker

Using AI Code Generation

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1import (2func (m *Main) Worker() {3 fmt.Println("Worker method of main class")4}5type Main struct {6}7func main() {8 runtime.GOMAXPROCS(runtime.NumCPU())9 var m = new(Main)10 go m.Worker()11 fmt.Scanln(&input)12}13import (14func (m *Main) Worker() {15 fmt.Println("Worker method of main class")16}17type Main struct {18}19func main() {20 runtime.GOMAXPROCS(runtime.NumCPU())21 var m = new(Main)22 go m.Worker()23 fmt.Scanln(&input)24}25import (26func (m *Main) Worker() {27 fmt.Println("Worker method of main struct")28}29type Main struct {30}31func main() {32 runtime.GOMAXPROCS(runtime.NumCPU())33 var m = new(Main)34 go m.Worker()35 fmt.Scanln(&input)36}37import (38func (m *Main) Worker() {39 fmt.Println("Worker method of main interface")40}41type Main interface {42}43func main()

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