How to use Try method of protect Package

Best Selenoid code snippet using protect.Try

frigate.go

Source:frigate.go

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 åå»ºå®æ¤çä»»å¡è¿ç¨13//14// 1. å¦æè¦ä»¥golangçå½æ°ä½ä¸ºåè¿ç¨:15// name ä»£è¡¨ frigate å®æ¤è¿ç¨çæ è¯ï¼frigate å°ä½¿ç¨è¿ä¸ªåååå»ºåè¿ç¨16// æ³¨æå¦æè¦ä½¿ç¨golangå½æ°ä½ä¸ºå®æ¤è¿ç¨ï¼é£ä¹å½æ°éè¦æåæ³¨å17// @see RegisterGolangTask18//19// 2. å¦æè¦ä»¥å¯æ§è¡ç¨åºä½ä¸ºåè¿ç¨:20// name ä»£è¡¨å¯æ§è¡ç¨åºçç»å¯¹è·¯å¾æèç¸å¯¹è·¯å¾21func 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 resourcesï¼it only use on linux32	ControlGroups []*cgroup.ControlGroup33	ProtectTask *ProtectTask34	Strategy    *Strategy35	// è¿ç¨ä¿¡å·éé36	SignalChan chan error37}38/**39 * åºç¨éç½®æ¥å£40 * ä¸»è¦ç¨äºè®²éç½®æ°æ®åºç¨äºcmd41 */42type ApplyConfig interface {43	/**44	 * åºç¨éç½®45	 * return: 0 æå46	 * 			å¶å®å¤±è´¥47	 */48	Apply(cmd *exec.Cmd) error49}50// Runable å¯è¿è¡ç¨åºæ¥å£51/*  å¯è¿è¡çä»»å¡æ¥å£52 */53type Runable interface {54	// å¯å¨55	Start() (err error)56	// åæ¢57	Stop(d time.Duration) (err error)58}59// Apply åºç¨éç½®60/**61 * åºç¨åè¿ç¨éç½®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 å¯å¨å®æ¤è¿ç¨75// å¯å¨å®æ¤è¿ç¨æ¶ä¼ä½¿ç¨å®æ¤çç¥åæ°76// å¯å¨è¿ç¨åï¼ä¼çå¬è¿ç¨ç¶æ77func (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		// è¿ç¨éåºä¿¡å·çå¬91		go func() {92			for e := range frigate.ProtectTask.Done() {93				// ç¨æ·ä¸»å¨å³éè¿ç¨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 2ï¼ å°è¯å¼å¸¸éå¯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 æ æ³æ£å¸¸å¯å¨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 ç¨æ·ä¸»å¨è°ç¨ï¼å³éå®æ¤è¿ç¨é»è¾118func (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}...

tryrwmutex_test.go

Source:tryrwmutex_test.go

...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}...

trymutex_test.go

Source:trymutex_test.go

...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}...

Try

Using AI Code Generation

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	}

Try

Using AI Code Generation

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}

Try

Using AI Code Generation

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}

Try

Using AI Code Generation

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}

Try

Using AI Code Generation

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}

Try

Using AI Code Generation

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}

Try

Using AI Code Generation

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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