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chan.go
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/
chan.go
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// Copyright (C) 2014-2018 Goodrain Co., Ltd.
// RAINBOND, Application Management Platform
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package util
import (
"context"
"time"
)
//SendNoBlocking 无阻塞发送
func SendNoBlocking(m []byte, ch chan []byte) {
select {
case ch <- m:
default:
}
}
//IntermittentExec 间歇性执行
func IntermittentExec(ctx context.Context, f func(), t time.Duration) {
tick := time.NewTicker(t)
defer tick.Stop()
for {
select {
case <-ctx.Done():
return
case <-tick.C:
f()
}
}
}
//Exec 上下文执行
func Exec(ctx context.Context, f func() error, wait time.Duration) error {
timer := time.NewTimer(wait)
defer timer.Stop()
for {
re := f()
if re != nil {
return re
}
timer.Reset(wait)
select {
case <-ctx.Done():
return nil
case <-timer.C:
}
}
}