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How to use Start method of runner Package

Best Gauge code snippet using runner.Start

runner_test.go

Source:runner_test.go

...24}25func noImportance(err0, err1 error) bool {26	return false27}28func (*RunnerSuite) TestOneWorkerStart(c *gc.C) {29	runner := worker.NewRunner(noneFatal, noImportance, time.Millisecond)30	starter := newTestWorkerStarter()31	err := runner.StartWorker("id", testWorkerStart(starter))32	c.Assert(err, jc.ErrorIsNil)33	starter.assertStarted(c, true)34	c.Assert(worker.Stop(runner), gc.IsNil)35	starter.assertStarted(c, false)36}37func (*RunnerSuite) TestOneWorkerFinish(c *gc.C) {38	runner := worker.NewRunner(noneFatal, noImportance, time.Millisecond)39	starter := newTestWorkerStarter()40	err := runner.StartWorker("id", testWorkerStart(starter))41	c.Assert(err, jc.ErrorIsNil)42	starter.assertStarted(c, true)43	starter.die <- nil44	starter.assertStarted(c, false)45	starter.assertNeverStarted(c)46	c.Assert(worker.Stop(runner), gc.IsNil)47}48func (*RunnerSuite) TestOneWorkerRestart(c *gc.C) {49	runner := worker.NewRunner(noneFatal, noImportance, time.Millisecond)50	starter := newTestWorkerStarter()51	err := runner.StartWorker("id", testWorkerStart(starter))52	c.Assert(err, jc.ErrorIsNil)53	starter.assertStarted(c, true)54	// Check it restarts a few times time.55	for i := 0; i < 3; i++ {56		starter.die <- fmt.Errorf("an error")57		starter.assertStarted(c, false)58		starter.assertStarted(c, true)59	}60	c.Assert(worker.Stop(runner), gc.IsNil)61	starter.assertStarted(c, false)62}63func (*RunnerSuite) TestOneWorkerStartFatalError(c *gc.C) {64	runner := worker.NewRunner(allFatal, noImportance, time.Millisecond)65	starter := newTestWorkerStarter()66	starter.startErr = errors.New("cannot start test task")67	err := runner.StartWorker("id", testWorkerStart(starter))68	c.Assert(err, jc.ErrorIsNil)69	err = runner.Wait()70	c.Assert(err, gc.Equals, starter.startErr)71}72func (*RunnerSuite) TestOneWorkerDieFatalError(c *gc.C) {73	runner := worker.NewRunner(allFatal, noImportance, time.Millisecond)74	starter := newTestWorkerStarter()75	err := runner.StartWorker("id", testWorkerStart(starter))76	c.Assert(err, jc.ErrorIsNil)77	starter.assertStarted(c, true)78	dieErr := errors.New("error when running")79	starter.die <- dieErr80	err = runner.Wait()81	c.Assert(err, gc.Equals, dieErr)82	starter.assertStarted(c, false)83}84func (*RunnerSuite) TestOneWorkerStartStop(c *gc.C) {85	runner := worker.NewRunner(allFatal, noImportance, time.Millisecond)86	starter := newTestWorkerStarter()87	err := runner.StartWorker("id", testWorkerStart(starter))88	c.Assert(err, jc.ErrorIsNil)89	starter.assertStarted(c, true)90	err = runner.StopWorker("id")91	c.Assert(err, jc.ErrorIsNil)92	starter.assertStarted(c, false)93	c.Assert(worker.Stop(runner), gc.IsNil)94}95func (*RunnerSuite) TestOneWorkerStopFatalError(c *gc.C) {96	runner := worker.NewRunner(allFatal, noImportance, time.Millisecond)97	starter := newTestWorkerStarter()98	starter.stopErr = errors.New("stop error")99	err := runner.StartWorker("id", testWorkerStart(starter))100	c.Assert(err, jc.ErrorIsNil)101	starter.assertStarted(c, true)102	err = runner.StopWorker("id")103	c.Assert(err, jc.ErrorIsNil)104	err = runner.Wait()105	c.Assert(err, gc.Equals, starter.stopErr)106}107func (*RunnerSuite) TestOneWorkerStartWhenStopping(c *gc.C) {108	runner := worker.NewRunner(allFatal, noImportance, 3*time.Second)109	starter := newTestWorkerStarter()110	starter.stopWait = make(chan struct{})111	err := runner.StartWorker("id", testWorkerStart(starter))112	c.Assert(err, jc.ErrorIsNil)113	starter.assertStarted(c, true)114	err = runner.StopWorker("id")115	c.Assert(err, jc.ErrorIsNil)116	err = runner.StartWorker("id", testWorkerStart(starter))117	c.Assert(err, jc.ErrorIsNil)118	close(starter.stopWait)119	starter.assertStarted(c, false)120	// Check that the task is restarted immediately without121	// the usual restart timeout delay.122	t0 := time.Now()123	starter.assertStarted(c, true)124	restartDuration := time.Since(t0)125	if restartDuration > 1*time.Second {126		c.Fatalf("task did not restart immediately")127	}128	c.Assert(worker.Stop(runner), gc.IsNil)129}130func (*RunnerSuite) TestOneWorkerRestartDelay(c *gc.C) {131	const delay = 100 * time.Millisecond132	runner := worker.NewRunner(noneFatal, noImportance, delay)133	starter := newTestWorkerStarter()134	err := runner.StartWorker("id", testWorkerStart(starter))135	c.Assert(err, jc.ErrorIsNil)136	starter.assertStarted(c, true)137	starter.die <- fmt.Errorf("non-fatal error")138	starter.assertStarted(c, false)139	t0 := time.Now()140	starter.assertStarted(c, true)141	restartDuration := time.Since(t0)142	if restartDuration < delay {143		c.Fatalf("restart delay was not respected; got %v want %v", restartDuration, delay)144	}145	c.Assert(worker.Stop(runner), gc.IsNil)146}147type errorLevel int148func (e errorLevel) Error() string {149	return fmt.Sprintf("error with importance %d", e)150}151func (*RunnerSuite) TestErrorImportance(c *gc.C) {152	moreImportant := func(err0, err1 error) bool {153		return err0.(errorLevel) > err1.(errorLevel)154	}155	id := func(i int) string { return fmt.Sprint(i) }156	runner := worker.NewRunner(allFatal, moreImportant, time.Millisecond)157	for i := 0; i < 10; i++ {158		starter := newTestWorkerStarter()159		starter.stopErr = errorLevel(i)160		err := runner.StartWorker(id(i), testWorkerStart(starter))161		c.Assert(err, jc.ErrorIsNil)162	}163	err := runner.StopWorker(id(4))164	c.Assert(err, jc.ErrorIsNil)165	err = runner.Wait()166	c.Assert(err, gc.Equals, errorLevel(9))167}168func (*RunnerSuite) TestStartWorkerWhenDead(c *gc.C) {169	runner := worker.NewRunner(allFatal, noImportance, time.Millisecond)170	c.Assert(worker.Stop(runner), gc.IsNil)171	c.Assert(runner.StartWorker("foo", nil), gc.Equals, worker.ErrDead)172}173func (*RunnerSuite) TestStopWorkerWhenDead(c *gc.C) {174	runner := worker.NewRunner(allFatal, noImportance, time.Millisecond)175	c.Assert(worker.Stop(runner), gc.IsNil)176	c.Assert(runner.StopWorker("foo"), gc.Equals, worker.ErrDead)177}178func (*RunnerSuite) TestAllWorkersStoppedWhenOneDiesWithFatalError(c *gc.C) {179	runner := worker.NewRunner(allFatal, noImportance, time.Millisecond)180	var starters []*testWorkerStarter181	for i := 0; i < 10; i++ {182		starter := newTestWorkerStarter()183		err := runner.StartWorker(fmt.Sprint(i), testWorkerStart(starter))184		c.Assert(err, jc.ErrorIsNil)185		starters = append(starters, starter)186	}187	for _, starter := range starters {188		starter.assertStarted(c, true)189	}190	dieErr := errors.New("fatal error")191	starters[4].die <- dieErr192	err := runner.Wait()193	c.Assert(err, gc.Equals, dieErr)194	for _, starter := range starters {195		starter.assertStarted(c, false)196	}197}198func (*RunnerSuite) TestFatalErrorWhileStarting(c *gc.C) {199	// Original deadlock problem that this tests for:200	// A worker dies with fatal error while another worker201	// is inside start(). runWorker can't send startInfo on startedc.202	runner := worker.NewRunner(allFatal, noImportance, time.Millisecond)203	slowStarter := newTestWorkerStarter()204	// make the startNotify channel synchronous so205	// we can delay the start indefinitely.206	slowStarter.startNotify = make(chan bool)207	err := runner.StartWorker("slow starter", testWorkerStart(slowStarter))208	c.Assert(err, jc.ErrorIsNil)209	fatalStarter := newTestWorkerStarter()210	fatalStarter.startErr = fmt.Errorf("a fatal error")211	err = runner.StartWorker("fatal worker", testWorkerStart(fatalStarter))212	c.Assert(err, jc.ErrorIsNil)213	// Wait for the runner loop to react to the fatal214	// error and go into final shutdown mode.215	time.Sleep(10 * time.Millisecond)216	// At this point, the loop is in shutdown mode, but the217	// slowStarter's worker is still in its start function.218	// When the start function continues (the first assertStarted219	// allows that to happen) and returns the new Worker,220	// runWorker will try to send it on runner.startedc.221	// This test makes sure that succeeds ok.222	slowStarter.assertStarted(c, true)223	slowStarter.assertStarted(c, false)224	err = runner.Wait()225	c.Assert(err, gc.Equals, fatalStarter.startErr)226}227func (*RunnerSuite) TestFatalErrorWhileSelfStartWorker(c *gc.C) {228	// Original deadlock problem that this tests for:229	// A worker tries to call StartWorker in its start function230	// at the same time another worker dies with a fatal error.231	// It might not be able to send on startc.232	runner := worker.NewRunner(allFatal, noImportance, time.Millisecond)233	selfStarter := newTestWorkerStarter()234	// make the startNotify channel synchronous so235	// we can delay the start indefinitely.236	selfStarter.startNotify = make(chan bool)237	selfStarter.hook = func() {238		runner.StartWorker("another", func() (worker.Worker, error) {239			return nil, fmt.Errorf("no worker started")240		})241	}242	err := runner.StartWorker("self starter", testWorkerStart(selfStarter))243	c.Assert(err, jc.ErrorIsNil)244	fatalStarter := newTestWorkerStarter()245	fatalStarter.startErr = fmt.Errorf("a fatal error")246	err = runner.StartWorker("fatal worker", testWorkerStart(fatalStarter))247	c.Assert(err, jc.ErrorIsNil)248	// Wait for the runner loop to react to the fatal249	// error and go into final shutdown mode.250	time.Sleep(10 * time.Millisecond)251	// At this point, the loop is in shutdown mode, but the252	// selfStarter's worker is still in its start function.253	// When the start function continues (the first assertStarted254	// allows that to happen) it will try to create a new255	// worker. This failed in an earlier version of the code because the256	// loop was not ready to receive start requests.257	selfStarter.assertStarted(c, true)258	selfStarter.assertStarted(c, false)259	err = runner.Wait()260	c.Assert(err, gc.Equals, fatalStarter.startErr)261}262type testWorkerStarter struct {263	startCount int32264	// startNotify receives true when the worker starts265	// and false when it exits. If startErr is non-nil,266	// it sends false only.267	startNotify chan bool268	// If stopWait is non-nil, the worker will269	// wait for a value to be sent on it before270	// exiting.271	stopWait chan struct{}272	// Sending a value on die causes the worker273	// to die with the given error.274	die chan error275	// If startErr is non-nil, the worker will die immediately276	// with this error after starting.277	startErr error278	// If stopErr is non-nil, the worker will die with this279	// error when asked to stop.280	stopErr error281	// The hook function is called after starting the worker.282	hook func()283}284func newTestWorkerStarter() *testWorkerStarter {285	return &testWorkerStarter{286		die:         make(chan error, 1),287		startNotify: make(chan bool, 100),288		hook:        func() {},289	}290}291func (starter *testWorkerStarter) assertStarted(c *gc.C, started bool) {292	select {293	case isStarted := <-starter.startNotify:294		c.Assert(isStarted, gc.Equals, started)295	case <-time.After(testing.LongWait):296		c.Fatalf("timed out waiting for start notification")297	}298}299func (starter *testWorkerStarter) assertNeverStarted(c *gc.C) {300	select {301	case isStarted := <-starter.startNotify:302		c.Fatalf("got unexpected start notification: %v", isStarted)303	case <-time.After(worker.RestartDelay + testing.ShortWait):304	}305}306func testWorkerStart(starter *testWorkerStarter) func() (worker.Worker, error) {307	return func() (worker.Worker, error) {308		return starter.start()309	}310}311func (starter *testWorkerStarter) start() (worker.Worker, error) {312	if count := atomic.AddInt32(&starter.startCount, 1); count != 1 {313		panic(fmt.Errorf("unexpected start count %d; expected 1", count))314	}315	if starter.startErr != nil {316		starter.startNotify <- false317		return nil, starter.startErr318	}319	task := &testWorker{320		starter: starter,321	}322	starter.startNotify <- true323	go task.run()324	return task, nil325}326type testWorker struct {327	starter *testWorkerStarter328	tomb    tomb.Tomb329}330func (t *testWorker) Kill() {331	t.tomb.Kill(nil)332}333func (t *testWorker) Wait() error {334	return t.tomb.Wait()335}336func (t *testWorker) run() {337	defer t.tomb.Done()338	t.starter.hook()339	select {340	case <-t.tomb.Dying():341		t.tomb.Kill(t.starter.stopErr)...

status_test.go

Source:status_test.go

...125		stat:   stat,126	}127}128func (r *runner) startAction(action *status.Action) {129	r.counts.StartedActions++130	r.counts.RunningActions++131	r.stat.StartAction(action, r.counts)132}133func (r *runner) finishAction(result status.ActionResult) {134	r.counts.FinishedActions++135	r.counts.RunningActions--136	r.stat.FinishAction(result, r.counts)137}138func (r *runner) finishAndStartAction(result status.ActionResult, action *status.Action) {139	r.counts.FinishedActions++140	r.stat.FinishAction(result, r.counts)141	r.counts.StartedActions++142	r.stat.StartAction(action, r.counts)143}144var (145	action1 = &status.Action{Description: "action1"}146	result1 = status.ActionResult{Action: action1}147	action2 = &status.Action{Description: "action2"}148	result2 = status.ActionResult{Action: action2}149	action3 = &status.Action{Description: "action3"}150	result3 = status.ActionResult{Action: action3}151)152func twoActions(stat status.StatusOutput) {153	runner := newRunner(stat, 2)154	runner.startAction(action1)155	runner.finishAction(result1)156	runner.startAction(action2)...

Start

Using AI Code Generation

1import (2func main() {3	r := NewRunner(3 * time.Second)4	r.Add(createTask(), createTask(), createTask())5	if err := r.Start(); err != nil {6		switch err {7			fmt.Println("Terminating due to interrupt")8			fmt.Println("Terminating due to timeout")9		}10	}11	fmt.Println("Process ended")12}13import (14type Runner struct {15	tasks []func(int)16}17var ErrTimeout = errors.New("received timeout")18var ErrInterrupt = errors.New("received interrupt")19func NewRunner(timeout time.Duration) *Runner {20	return &Runner{21		interrupt: make(chan os.Signal, 1),22		complete:  make(chan error),23		timeout:   time.After(timeout),24	}25}26func (r *Runner) Add(tasks ...func(int)) {27	r.tasks = append(r.tasks, tasks...)28}29func (r *Runner) Start() error {30	signal.Notify(r.interrupt, os.Interrupt)31	go func() {32		r.complete <- r.run()33	}()34	select {

Start

Using AI Code Generation

1import (2func main() {3	r := runner.New(3 * time.Second)4	r.Add(createTask(), createTask(), createTask())5	if err := r.Start(); err != nil {6		switch err {7			println("Terminating due to timeout.")8			os.Exit(1)9			println("Terminating due to interrupt.")10			os.Exit(2)11		}12	}13	println("Process ended.")14}15import (16func main() {17	signals := make(chan os.Signal, 1)18	signal.Notify(signals, os.Interrupt)19}20import (21func main() {22	ticker := time.NewTicker(500 * time.Millisecond)23	go func() {24		for t := range ticker.C {25			fmt.Println("Tick at", t)26		}27	}()28	time.Sleep(1600 * time.Millisecond)29	ticker.Stop()30	fmt.Println("Ticker stopped")31}32import (33func main() {34	timer1 := time.NewTimer(time.Second * 2)35	fmt.Println("Timer 1 expired")36	timer2 := time.NewTimer(time.Second)37	go func() {38		fmt.Println("Timer 2 expired")39	}()40	stop2 := timer2.Stop()41	if stop2 {42		fmt.Println("Timer 2 stopped")43	}44}45import (46func main() {47	timer := time.NewTimer(time.Second)48	fmt.Println("Timer 1 expired")49	timer.Reset(time.Second)50	fmt.Println("Timer 2 expired")51}52import (53func main() {54	timer := time.NewTimer(time.Second)55	go func() {56		fmt.Println("Timer expired")57	}()58	stop := timer.Stop()59	if stop {60		fmt.Println("Timer stopped")61	}62}63import (

Start

Using AI Code Generation

1import (2func main() {3	log.Println("Starting work.")4	r := New(30 * time.Second)5	r.Add(createTask(), createTask(), createTask())6	go func() {7		r.Start()8	}()9	sigChan := make(chan os.Signal, 1)10	signal.Notify(sigChan, syscall.SIGINT)11	log.Printf("Terminating: %v12", r.Stop())13}14import (15type Runner struct {16	tasks []func(int)17}18var ErrTimeout = errors.New("received timeout")19var ErrInterrupt = errors.New("received interrupt")20func New(d time.Duration) *Runner {21	return &Runner{22		interrupt: make(chan os.Signal, 1),23		complete:  make(chan error),24		timeout:   time.After(d),25	}26}27func (r *Runner) Add(tasks ...func(int)) {28	r.tasks = append(r.tasks, tasks...)29}30func (r *Runner) Start() error {31	signal.Notify(r.interrupt, os.Interrupt)32	go func() {

Start

Using AI Code Generation

1import (2func main() {3    fmt.Println("Starting work.")4    r := runner.New(30 * time.Second)5    r.Add(createTask(), createTask(), createTask())6    r.Start()7    sig := make(chan os.Signal, 1)8    signal.Notify(sig, os.Interrupt)9    select {10        r.Stop()11    case result := <-r.Start():12        fmt.Printf("Received result %v13    }14    fmt.Println("Terminating program.")15}

Start

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println("Start")4    runner := NewRunner(3, false, task)5    runner.Start()6    fmt.Println("End")7}8import "fmt"9func main() {10    fmt.Println("Start")11    runner := NewRunner(3, false, task)12    runner.StartAll()13    fmt.Println("End")14}15import "fmt"16func main() {17    fmt.Println("Start")18    runner := NewRunner(3, false, task)19    runner.StartAll()20    fmt.Println("End")21}22import "fmt"23func main() {24    fmt.Println("Start")25    runner := NewRunner(3, false, task)26    runner.StartAll()27    fmt.Println("End")28}29import "fmt"30func main() {31    fmt.Println("Start")32    runner := NewRunner(3, false, task)33    runner.StartAll()34    fmt.Println("End")35}36func task(id int) {37    time.Sleep(time.Second)38}39func (r *Runner) Stop() {40    r.cancel()41}

Start

Using AI Code Generation

1import (2var (3func main() {4	file, err := os.Open("C:\\Users\\test\\Desktop\\test.txt")5	if err != nil {6		log.Fatal(err)7	}8	defer file.Close()9	scanner := bufio.NewScanner(file)10	for scanner.Scan() {

Start

Using AI Code Generation

1import (2func main() {3	fmt.Println("Starting Work.")4	go func(msg string) {5		fmt.Println(msg)6	}("going")7	time.Sleep(time.Second)8	fmt.Println("Done.")9}10import (11func main() {12	fmt.Println("Starting Work.")13	runtime.GOMAXPROCS(1)14	go func(msg string) {15		fmt.Println(msg)16	}("going")17	time.Sleep(time.Second)18	fmt.Println("Done.")19}20import (21func main() {22	fmt.Println("Starting Work.")23	runtime.GOMAXPROCS(2)24	go func(msg string) {25		fmt.Println(msg)26	}("going")27	time.Sleep(time.Second)28	fmt.Println("Done.")29}30import (

Start

Using AI Code Generation

1import "fmt"2func main() {3 r := NewRunner(3)4 r.Start()5 fmt.Println("end")6}

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