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//go:build !race
package lo
import (
"errors"
"fmt"
"sync"
"sync/atomic"
"time"
)
func ExampleNewDebounce() {
i := int32(0)
calls := []int32{}
mu := sync.Mutex{}
debounce, cancel := NewDebounce(time.Millisecond, func() {
mu.Lock()
defer mu.Unlock()
calls = append(calls, atomic.LoadInt32(&i))
})
debounce()
atomic.AddInt32(&i, 1)
time.Sleep(5 * time.Millisecond)
debounce()
atomic.AddInt32(&i, 1)
debounce()
atomic.AddInt32(&i, 1)
debounce()
atomic.AddInt32(&i, 1)
time.Sleep(5 * time.Millisecond)
cancel()
mu.Lock()
fmt.Printf("%v", calls)
mu.Unlock()
// Output: [1 4]
}
func ExampleNewDebounceBy() {
calls := map[string][]int{}
mu := sync.Mutex{}
debounce, cancel := NewDebounceBy(time.Millisecond, func(userID string, count int) {
mu.Lock()
defer mu.Unlock()
if _, ok := calls[userID]; !ok {
calls[userID] = []int{}
}
calls[userID] = append(calls[userID], count)
})
debounce("samuel")
debounce("john")
time.Sleep(5 * time.Millisecond)
debounce("john")
debounce("john")
debounce("samuel")
debounce("john")
time.Sleep(5 * time.Millisecond)
cancel("samuel")
cancel("john")
mu.Lock()
fmt.Printf("samuel: %v\n", calls["samuel"])
fmt.Printf("john: %v\n", calls["john"])
mu.Unlock()
// Output:
// samuel: [1 1]
// john: [1 3]
}
func ExampleAttempt() {
count1, err1 := Attempt(2, func(i int) error {
if i == 0 {
return errors.New("error")
}
return nil
})
count2, err2 := Attempt(2, func(i int) error {
if i < 10 {
return errors.New("error")
}
return nil
})
fmt.Printf("%v %v\n", count1, err1)
fmt.Printf("%v %v\n", count2, err2)
// Output:
// 2 <nil>
// 2 error
}
func ExampleAttemptWithDelay() {
count1, time1, err1 := AttemptWithDelay(2, time.Millisecond, func(i int, _ time.Duration) error {
if i == 0 {
return errors.New("error")
}
return nil
})
count2, time2, err2 := AttemptWithDelay(2, time.Millisecond, func(i int, _ time.Duration) error {
if i < 10 {
return errors.New("error")
}
return nil
})
fmt.Printf("%v %v %v\n", count1, time1.Truncate(time.Millisecond), err1)
fmt.Printf("%v %v %v\n", count2, time2.Truncate(time.Millisecond), err2)
// Output:
// 2 1ms <nil>
// 2 1ms error
}
func ExampleTransaction() {
transaction := NewTransaction[int]().
Then(
func(state int) (int, error) {
fmt.Println("step 1")
return state + 10, nil
},
func(state int) int {
fmt.Println("rollback 1")
return state - 10
},
).
Then(
func(state int) (int, error) {
fmt.Println("step 2")
return state + 15, nil
},
func(state int) int {
fmt.Println("rollback 2")
return state - 15
},
).
Then(
func(state int) (int, error) {
fmt.Println("step 3")
if true {
return state, errors.New("error")
}
return state + 42, nil
},
func(state int) int {
fmt.Println("rollback 3")
return state - 42
},
)
_, _ = transaction.Process(-5)
// Output:
// step 1
// step 2
// step 3
// rollback 2
// rollback 1
}
func ExampleTransaction_ok() {
transaction := NewTransaction[int]().
Then(
func(state int) (int, error) {
return state + 10, nil
},
func(state int) int {
return state - 10
},
).
Then(
func(state int) (int, error) {
return state + 15, nil
},
func(state int) int {
return state - 15
},
).
Then(
func(state int) (int, error) {
return state + 42, nil
},
func(state int) int {
return state - 42
},
)
state, err := transaction.Process(-5)
fmt.Println(state)
fmt.Println(err)
// Output:
// 62
// <nil>
}
func ExampleTransaction_error() {
transaction := NewTransaction[int]().
Then(
func(state int) (int, error) {
return state + 10, nil
},
func(state int) int {
return state - 10
},
).
Then(
func(state int) (int, error) {
return state, errors.New("error")
},
func(state int) int {
return state - 15
},
).
Then(
func(state int) (int, error) {
return state + 42, nil
},
func(state int) int {
return state - 42
},
)
state, err := transaction.Process(-5)
fmt.Println(state)
fmt.Println(err)
// Output:
// -5
// error
}
func ExampleNewThrottle() {
throttle, reset := NewThrottle(100*time.Millisecond, func() {
fmt.Println("Called once in every 100ms")
})
for j := 0; j < 10; j++ {
throttle()
time.Sleep(30 * time.Millisecond)
}
reset()
// Output:
// Called once in every 100ms
// Called once in every 100ms
// Called once in every 100ms
}
func ExampleNewThrottleWithCount() {
throttle, reset := NewThrottleWithCount(100*time.Millisecond, 2, func() {
fmt.Println("Called once in every 100ms")
})
for j := 0; j < 10; j++ {
throttle()
time.Sleep(30 * time.Millisecond)
}
reset()
// Output:
// Called once in every 100ms
// Called once in every 100ms
// Called once in every 100ms
// Called once in every 100ms
// Called once in every 100ms
// Called once in every 100ms
}
func ExampleNewThrottleBy() {
throttle, reset := NewThrottleBy(100*time.Millisecond, func(key string) {
fmt.Println(key, "Called once in every 100ms")
})
for j := 0; j < 10; j++ {
throttle("foo")
throttle("bar")
time.Sleep(30 * time.Millisecond)
}
reset()
// Output:
// foo Called once in every 100ms
// bar Called once in every 100ms
// foo Called once in every 100ms
// bar Called once in every 100ms
// foo Called once in every 100ms
// bar Called once in every 100ms
}
func ExampleNewThrottleByWithCount() {
throttle, reset := NewThrottleByWithCount(100*time.Millisecond, 2, func(key string) {
fmt.Println(key, "Called once in every 100ms")
})
for j := 0; j < 10; j++ {
throttle("foo")
throttle("bar")
time.Sleep(30 * time.Millisecond)
}
reset()
// Output:
// foo Called once in every 100ms
// bar Called once in every 100ms
// foo Called once in every 100ms
// bar Called once in every 100ms
// foo Called once in every 100ms
// bar Called once in every 100ms
// foo Called once in every 100ms
// bar Called once in every 100ms
// foo Called once in every 100ms
// bar Called once in every 100ms
// foo Called once in every 100ms
// bar Called once in every 100ms
}