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task.go
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task.go
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// Copyright © 2017 The Kubicorn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package task
import (
"time"
"github.com/kubicorn/kubicorn/pkg/logger"
)
type Task func() error
var (
DefaultTicker = time.NewTicker(200 * time.Millisecond)
)
// RunAnnotated annotates a task with a description and a sequence of symbols indicating task activity until it terminates
func RunAnnotated(task Task, description string, symbol string, options ...interface{}) error {
doneCh := make(chan bool)
errCh := make(chan error)
l := logger.Log
t := DefaultTicker
for _, o := range options {
if value, ok := o.(logger.Logger); ok {
l = value
} else if value, ok := o.(*time.Ticker); ok {
t = value
}
}
go func() {
errCh <- task()
}()
l(description)
logActivity(symbol, l, t, doneCh)
err := <-errCh
doneCh <- true
return err
}
// logs a sequence of symbols (one for each tick) indicating task activity until a quit is received
func logActivity(symbol string, logger logger.Logger, ticker *time.Ticker, quitCh <-chan bool) {
go func() {
for {
select {
case <-ticker.C:
logger(symbol)
case <-quitCh:
ticker.Stop()
return
}
}
}()
}