How to use Try method of protect Package

Best Selenoid code snippet using protect.Try

frigate.go

Source:frigate.go Github

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1package frigate2import (3 "errors"4 "fmt"5 "os/exec"6 "time"7 "github.com/DailyC/frigated/pkgs/cgroup"8 "github.com/DailyC/frigated/pkgs/logger"9)10//@author Wang Weiwei11//@since 2020/3/2412// Create 创建守护的任务进程13//14// 1. 如果要以golang的函数作为子进程:15// name 代表 frigate 守护进程的标识，frigate 将使用这个名字创建子进程16// 注意如果要使用golang函数作为守护进程，那么函数需要提前注册17// @see RegisterGolangTask18//19// 2. 如果要以可执行程序作为子进程:20// name 代表可执行程序的绝对路径或者相对路径21func Create(name string) *Frigate {22 return &Frigate{23 Log: logger.DefaultLogger(),24 ProtectTask: NewProtectTask(name),25 Strategy: defaultStrategy(),26 }27}28type Frigate struct {29 // config of task logger30 Log *logger.FLogger31 // control groups of resources，it only use on linux32 ControlGroups []*cgroup.ControlGroup33 ProtectTask *ProtectTask34 Strategy *Strategy35 // 进程信号通道36 SignalChan chan error37}38/**39 * 应用配置接口40 * 主要用于讲配置数据应用于cmd41 */42type ApplyConfig interface {43 /**44 * 应用配置45 * return: 0 成功46 * 其它失败47 */48 Apply(cmd *exec.Cmd) error49}50// Runable 可运行程序接口51/* 可运行的任务接口52 */53type Runable interface {54 // 启动55 Start() (err error)56 // 停止57 Stop(d time.Duration) (err error)58}59// Apply 应用配置60/**61 * 应用子进程配置62 */63func (frigate *Frigate) Apply(cmd *exec.Cmd) (err error) {64 err = frigate.Log.Apply(cmd)65 if err != nil {66 return err67 }68 err = frigate.Strategy.Apply(frigate.ProtectTask.Cmd)69 if err != nil {70 return err71 }72 return nil73}74// Start 启动守护进程75// 启动守护进程时会使用守护策略参数76// 启动进程后，会监听进程状态77func (frigate *Frigate) Start() (err error) {78 if frigate.ProtectTask != nil && frigate.ProtectTask.Cmd != nil {79 err = frigate.Apply(frigate.ProtectTask.Cmd)80 if err != nil {81 return err82 }83 frigate.Log.Stderr.Write([]byte(fmt.Sprintf("[DEBUG] %s frigated.go start %s task by frigate\n", time.Now().String(), frigate.ProtectTask.Name)))84 err = frigate.ProtectTask.Start()85 if err != nil {86 frigate.Log.Stderr.Write([]byte(fmt.Sprintf("[ERROR] %s frigated.go %s task can not start case by %s\n",87 time.Now().String(), frigate.ProtectTask.Name, err.Error())))88 return err89 }90 // 进程退出信号监听91 go func() {92 for e := range frigate.ProtectTask.Done() {93 // 用户主动关闭进程94 if e.Error() == CANCEL_PROCESS {95 frigate.Log.Stderr.Write([]byte(fmt.Sprintf("[WARN] %s frigated.go cancel %s task by frigate\n", time.Now().String(), frigate.ProtectTask.Name)))96 } else {97 // case 2： 尝试异常重启98 if frigate.Strategy.tryRestart(frigate.ProtectTask.StartTime.Sub(time.Now())) {99 frigate.Log.Stderr.Write([]byte(100 fmt.Sprintf("[ERROR] %s frigated.go %s task exit %s, try restart task and remaining %d times for retry start fail case\n",101 time.Now().String(), frigate.ProtectTask.Name, e.Error(), frigate.Strategy.StartRetries)))102 frigate.Start()103 } else {104 // case 3 无法正常启动105 frigate.Log.Stderr.Write([]byte(fmt.Sprintf("[ERROR] %s frigated.go %s task start fail %s, and beyond the max restart times\n", 106 time.Now().String(), frigate.ProtectTask.Name, e.Error())))107 }108 }109 }110 }()111 } else {112 // no args113 return errors.New("no init command")114 }115 return nil116}117// Stop 用户主动调用，关闭守护进程逻辑118func (frigate *Frigate) Stop(d time.Duration) (err error) {119 err = frigate.ProtectTask.Stop(frigate.Strategy.GraceCloseWait)120 frigate.Log.Stderr.Write([]byte(fmt.Sprintf("[WARNING] %s frigated.go %s task stop return %s\n", time.Now().String(), frigate.ProtectTask.Name, err.Error())))121 return err122}...

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tryrwmutex_test.go

Source:tryrwmutex_test.go Github

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...3 "runtime"4 "sync"5 "testing"6)7// TestTryRWMutexBasicMutex verifies that Lock and Unlock work the same as a8// normal mutex would.9func TestTryRWMutexBasicMutex(t *testing.T) {10 // Check that two calls to lock will execute in the correct order.11 var tm TryRWMutex12 var data int13 tm.Lock()14 go func() {15 data = 1516 tm.Unlock()17 }()18 tm.Lock()19 if data != 15 {20 t.Error("Locking did not safely protect the data")21 }22 tm.Unlock()23}24// TestTryRWMutexConcurrentLocking checks that doing lots of concurrent locks25// is handled as expected.26func TestTryRWMutexConcurrentLocking(t *testing.T) {27 if testing.Short() {28 t.SkipNow()29 }30 // Try executing multiple additions concurrently.31 var tm TryRWMutex32 var data int33 var wg sync.WaitGroup34 for i := 0; i < 250; i++ {35 wg.Add(1)36 go func() {37 tm.Lock()38 data++39 tm.Unlock()40 wg.Done()41 }()42 }43 wg.Wait()44 if data != 250 {45 t.Error("Locking did not safely protect the data")46 }47}48// TestTryRWMutexBasicTryLock checks that a TryLock will succeed if nobody is49// holding a lock, and will fail if the lock is being held.50func TestTryRWMutexBasicTryLock(t *testing.T) {51 // Lock and then TryLock.52 var tm TryRWMutex53 tm.Lock()54 if tm.TryLock() {55 t.Error("TryLock should have failed")56 }57 tm.Unlock()58 tm.Lock()59 tm.Unlock()60 // TryLock and then TryLock.61 if !tm.TryLock() {62 t.Error("Could not get a blank lock")63 }64 if tm.TryLock() {65 t.Error("should not have been able to get the lock")66 }67 tm.Unlock()68}69// TestTryRWMutexConcurrentTries attempts to grab locks from many threads,70// giving the race detector a chance to detect any issues.71func TestTryRWMutexConncurrentTries(t *testing.T) {72 if testing.Short() {73 t.SkipNow()74 }75 // Try executing multiple additions concurrently.76 var tm TryRWMutex77 var data int78 var wg sync.WaitGroup79 for i := 0; i < 250; i++ {80 wg.Add(1)81 go func() {82 for !tm.TryLock() {83 }84 data++85 tm.Unlock()86 wg.Done()87 }()88 }89 wg.Wait()90 if data != 250 {91 t.Error("Locking did not safely protect the data")92 }93}94// TestTryRWMutexReadAvailable will try to acquire a read lock on the mutex95// when it is supposed to be available.96func TestTryRWMutexReadAvailable(t *testing.T) {97 var tm TryRWMutex98 if !tm.TryRLock() {99 t.Fatal("Unable to get readlock on a fresh TryRWMutex")100 }101 // Grab the lock and increment the data in a goroutine.102 var data int103 var wg sync.WaitGroup104 wg.Add(2)105 go func() {106 defer wg.Done()107 tm.Lock()108 data++109 tm.Unlock()110 }()111 runtime.Gosched()112 go func() {113 defer wg.Done()114 tm.Lock()115 data++116 tm.Unlock()117 }()118 runtime.Gosched()119 // Read the data, readlock should be held.120 if data != 0 {121 t.Fatal("Data should not have changed while under readlock")122 }123 // Release the lock and wait for the other locks to finish their124 // modifications.125 tm.RUnlock()126 wg.Wait()127 // Try to grab another readlock. It should succeed. The data should have128 // changed.129 if !tm.TryRLock() {130 t.Fatal("Unable to get readlock on available TryRWMutex")131 }132 if data != 2 {133 t.Error("Data does not seem to have been altered correctly")134 }135 tm.RUnlock()136}137// TestTryRWMutexReadUnavailable will try to acquire a read lock on the mutex138// when it is supposed to be available.139func TestTryRWMutexReadUnavailable(t *testing.T) {140 var tm TryRWMutex141 if !tm.TryRLock() {142 t.Fatal("Unable to get readlock on a fresh TryRWMutex")143 }144 // Grab the lock and increment the data in a goroutine.145 var data int146 var wg sync.WaitGroup147 wg.Add(2)148 go func() {149 defer wg.Done()150 tm.Lock()151 data++152 tm.Unlock()153 }()154 runtime.Gosched()155 go func() {156 defer wg.Done()157 tm.Lock()158 data++159 tm.Unlock()160 }()161 runtime.Gosched()162 // Read the data, readlock should be held.163 if data != 0 {164 t.Fatal("Data should not have changed while under readlock")165 }166 // Try to grab another readlock. It should not succeed.167 if tm.TryRLock() {168 t.Fatal("Able to get readlock on available TryRWMutex")169 }170 // Release the lock and wait for the other locks to finish their171 // modifications.172 tm.RUnlock()173 wg.Wait()174}...

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trymutex_test.go

Source:trymutex_test.go Github

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...3 "sync"4 "testing"5 "time"6)7// TestTryMutexBasicMutex verifies that Lock and Unlock work the same as a8// normal mutex would.9func TestTryMutexBasicMutex(t *testing.T) {10 // Check that two calls to lock will execute in the correct order.11 var tm TryMutex12 var data int13 tm.Lock()14 go func() {15 data = 1516 tm.Unlock()17 }()18 tm.Lock()19 if data != 15 {20 t.Error("Locking did not safely protect the data")21 }22 tm.Unlock()23}24// TestTryMutexConcurrentLocking checks that doing lots of concurrent locks is25// handled as expected.26func TestTryMutexConcurrentLocking(t *testing.T) {27 if testing.Short() {28 t.SkipNow()29 }30 // Try executing multiple additions concurrently.31 var tm TryMutex32 var data int33 var wg sync.WaitGroup34 for i := 0; i < 250; i++ {35 wg.Add(1)36 go func() {37 tm.Lock()38 data++39 tm.Unlock()40 wg.Done()41 }()42 }43 wg.Wait()44 if data != 250 {45 t.Error("Locking did not safely protect the data")46 }47}48// TestTryMutexBasicTryLock checks that a TryLock will succeed if nobody is49// holding a lock, and will fail if the lock is being held.50func TestTryMutexBasicTryLock(t *testing.T) {51 // Lock and then TryLock.52 var tm TryMutex53 tm.Lock()54 if tm.TryLock() {55 t.Error("TryLock should have failed")56 }57 tm.Unlock()58 tm.Lock()59 tm.Unlock()60 // TryLock and then TryLock.61 if !tm.TryLock() {62 t.Error("Could not get a blank lock")63 }64 if tm.TryLock() {65 t.Error("should not have been able to get the lock")66 }67 tm.Unlock()68}69// TestTryMutexConcurrentTries attempts to grab locks from many threads, giving70// the race detector a chance to detect any issues.71func TestTryMutexConncurrentTries(t *testing.T) {72 if testing.Short() {73 t.SkipNow()74 }75 // Try executing multiple additions concurrently.76 var tm TryMutex77 var data int78 var wg sync.WaitGroup79 for i := 0; i < 250; i++ {80 wg.Add(1)81 go func() {82 for !tm.TryLock() {83 }84 data++85 tm.Unlock()86 wg.Done()87 }()88 }89 wg.Wait()90 if data != 250 {91 t.Error("Locking did not safely protect the data")92 }93}94// TestTryMutexTimed checks that a timed lock will correctly time out if it95// cannot grab a lock.96func TestTryMutexTimed(t *testing.T) {97 if testing.Short() {98 t.SkipNow()99 }100 var tm TryMutex101 tm.Lock()102 startTime := time.Now()103 if tm.TryLockTimed(time.Millisecond * 500) {104 t.Error("was able to grab a locked lock")105 }106 wait := time.Now().Sub(startTime)107 if wait < time.Millisecond*450 {108 t.Error("lock did not wait the correct amount of time before timing out", wait)109 }110 if wait > time.Millisecond*900 {111 t.Error("lock waited too long before timing out", wait)112 }113 tm.Unlock()114 if !tm.TryLockTimed(time.Millisecond * 1) {115 t.Error("Unable to get an unlocked lock")116 }117 tm.Unlock()118}119// TestTryMutexTimedConcurrent checks that a timed lock will correctly time out120// if it cannot grab a lock.121func TestTryMutexTimedConcurrent(t *testing.T) {122 if testing.Short() {123 t.SkipNow()124 }125 var tm TryMutex126 // Engage a lock and launch a gothread to wait for a lock, fail, and then127 // call unlock.128 tm.Lock()129 go func() {130 startTime := time.Now()131 if tm.TryLockTimed(time.Millisecond * 500) {132 t.Error("was able to grab a locked lock")133 }134 wait := time.Now().Sub(startTime)135 if wait < time.Millisecond*450 {136 t.Error("lock did not wait the correct amount of time before timing out:", wait)137 }138 if wait > time.Millisecond*900 {139 t.Error("lock waited too long before timing out", wait)140 }141 tm.Unlock()142 }()143 // Try to get a lock, but don't wait long enough.144 if tm.TryLockTimed(time.Millisecond * 250) {145 // Lock shoud time out because the gothread responsible for releasing146 // the lock will be idle for 500 milliseconds.147 t.Error("Lock should have timed out")148 }149 if !tm.TryLockTimed(time.Millisecond * 950) {150 // Lock should be successful - the above thread should finish in under151 // 950 milliseconds.152 t.Error("Lock should have been successful")153 }154 tm.Unlock()155}...

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Try

Using AI Code Generation

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1import (2func main() {3 fmt.Println("Number of CPUs: ", runtime.NumCPU())4 fmt.Println("Number of Goroutines: ", runtime.NumGoroutine())5 p := NewProtect()6 c := make(chan bool)7 f := func() {8 done := make(chan bool)9 go func() {10 fmt.Println("This is a new goroutine")11 }()12 }13 p.Try(f, c)14 fmt.Println("This is the end")15 fmt.Println("Number of Goroutines: ", runtime.NumGoroutine())16}17import (18func main() {19 fmt.Println("Number of CPUs: ", runtime.NumCPU())20 fmt.Println("Number of Goroutines: ", runtime.NumGoroutine())21 p := NewProtect()22 c := make(chan bool)23 f := func() {24 done := make(chan bool)25 go func() {26 fmt.Println("This is a new goroutine")27 }()28 go func() {29 fmt.Println("This is another new goroutine")30 }()31 }

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Try

Using AI Code Generation

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1import "fmt"2type protect struct {3}4func (p protect) Try(guess string) bool {5}6func main() {7 p := protect{"GOLANG"}8 fmt.Println(p.Try("GO"))9 fmt.Println(p.Try("GOLANG"))10}

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Try

Using AI Code Generation

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1import (2func main() {3 defer fmt.Println("Defer main")4 runtime.GOMAXPROCS(1)5 for i := 0; i < 10; i++ {6 go func(i int) {7 defer fmt.Println("Defer go routine", i)8 for {9 runtime.Gosched()10 }11 }(i)12 }13 fmt.Println("a = ", a)14}

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Try

Using AI Code Generation

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1import (2func main() {3 fmt.Println("Hello World!")4 try := protect.NewTry()5 try.Try(func() {6 panic("Panic")7 })8 try.Try(func() {9 fmt.Println("No Panic")10 })11 try.Try(func() {12 panic("Panic")13 })14 try.Try(func() {15 panic("Panic")16 })17 try.Try(func() {18 fmt.Println("No Panic")19 })20 try.Try(func() {21 panic("Panic")22 })23 try.Try(func() {24 fmt.Println("No Panic")25 })26 try.Try(func() {27 panic("Panic")28 })29 try.Try(func() {30 panic("Panic")31 })32 try.Try(func() {33 fmt.Println("No Panic")34 })35 try.Try(func() {36 panic("Panic")37 })38 try.Try(func() {39 fmt.Println("No Panic")40 })41 try.Try(func() {42 panic("Panic")43 })44 try.Try(func() {45 fmt.Println("No Panic")46 })47 try.Try(func() {48 panic("Panic")49 })50 try.Try(func() {51 panic("Panic")52 })53 try.Try(func() {54 fmt.Println("No Panic")55 })56 try.Try(func() {57 panic("Panic")58 })59 try.Try(func() {60 fmt.Println("No Panic")61 })62 try.Try(func() {63 panic("Panic")64 })65 try.Try(func() {66 fmt.Println("No Panic")67 })68 try.Try(func() {69 panic("Panic")70 })71 try.Try(func() {72 panic("Panic")73 })74 try.Try(func() {75 fmt.Println("No Panic")76 })77 try.Try(func() {78 panic("Panic")79 })80 try.Try(func() {81 fmt.Println("No Panic")82 })83 try.Try(func() {84 panic("Panic")85 })86 try.Try(func() {87 fmt.Println("No Panic")88 })89 try.Try(func() {90 panic("Panic")91 })92 try.Try(func() {93 panic("Panic")94 })95 try.Try(func() {96 fmt.Println("No Panic")97 })98 try.Try(func() {99 panic("Panic")100 })101 try.Try(func() {102 fmt.Println("No Panic")103 })104}

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Try

Using AI Code Generation

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1import (2func main() {3 runtime.GOMAXPROCS(1)4 defer protect.Try(func() {5 err := recover()6 if err != nil {7 fmt.Println("Error:", err)8 }9 })10 go func() {11 panic("Error")12 }()13 for {14 }15}

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Try

Using AI Code Generation

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1import (2func main() {3 fmt.Println("Enter a number")4 fmt.Scanln(&x)5 p := protect.New(x)6 fmt.Println("Before calling Try")7 p.Try()8 fmt.Println("After calling Try")9}

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Try

Using AI Code Generation

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1import (2func main() {3 protect.Try(func() {4 fmt.Println("Hello World")5 time.Sleep(1 * time.Second)6 panic("Something went wrong")7 }, func(e interface{}) {8 fmt.Println(e)9 })10}

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