diff options
Diffstat (limited to 'vendor/github.com/robfig/cron/v3/chain.go')
-rw-r--r-- | vendor/github.com/robfig/cron/v3/chain.go | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/vendor/github.com/robfig/cron/v3/chain.go b/vendor/github.com/robfig/cron/v3/chain.go deleted file mode 100644 index 9565b418e..000000000 --- a/vendor/github.com/robfig/cron/v3/chain.go +++ /dev/null @@ -1,92 +0,0 @@ -package cron - -import ( - "fmt" - "runtime" - "sync" - "time" -) - -// JobWrapper decorates the given Job with some behavior. -type JobWrapper func(Job) Job - -// Chain is a sequence of JobWrappers that decorates submitted jobs with -// cross-cutting behaviors like logging or synchronization. -type Chain struct { - wrappers []JobWrapper -} - -// NewChain returns a Chain consisting of the given JobWrappers. -func NewChain(c ...JobWrapper) Chain { - return Chain{c} -} - -// Then decorates the given job with all JobWrappers in the chain. -// -// This: -// NewChain(m1, m2, m3).Then(job) -// is equivalent to: -// m1(m2(m3(job))) -func (c Chain) Then(j Job) Job { - for i := range c.wrappers { - j = c.wrappers[len(c.wrappers)-i-1](j) - } - return j -} - -// Recover panics in wrapped jobs and log them with the provided logger. -func Recover(logger Logger) JobWrapper { - return func(j Job) Job { - return FuncJob(func() { - defer func() { - if r := recover(); r != nil { - const size = 64 << 10 - buf := make([]byte, size) - buf = buf[:runtime.Stack(buf, false)] - err, ok := r.(error) - if !ok { - err = fmt.Errorf("%v", r) - } - logger.Error(err, "panic", "stack", "...\n"+string(buf)) - } - }() - j.Run() - }) - } -} - -// DelayIfStillRunning serializes jobs, delaying subsequent runs until the -// previous one is complete. Jobs running after a delay of more than a minute -// have the delay logged at Info. -func DelayIfStillRunning(logger Logger) JobWrapper { - return func(j Job) Job { - var mu sync.Mutex - return FuncJob(func() { - start := time.Now() - mu.Lock() - defer mu.Unlock() - if dur := time.Since(start); dur > time.Minute { - logger.Info("delay", "duration", dur) - } - j.Run() - }) - } -} - -// SkipIfStillRunning skips an invocation of the Job if a previous invocation is -// still running. It logs skips to the given logger at Info level. -func SkipIfStillRunning(logger Logger) JobWrapper { - return func(j Job) Job { - var ch = make(chan struct{}, 1) - ch <- struct{}{} - return FuncJob(func() { - select { - case v := <-ch: - j.Run() - ch <- v - default: - logger.Info("skip") - } - }) - } -} |