/
wait_for_result.go
124 lines (102 loc) · 2.45 KB
/
wait_for_result.go
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// Copyright © 2020 Banzai Cloud
//
// 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 workflow
import (
"fmt"
"io"
"sync"
"time"
"github.com/vmware/govmomi/vim25/progress"
"go.uber.org/zap"
)
type progressLogger struct {
taskName string
logger *zap.SugaredLogger
wg sync.WaitGroup
sink chan chan progress.Report
done chan struct{}
}
func newProgressLogger(taskName string, logger *zap.SugaredLogger) *progressLogger {
p := &progressLogger{
taskName: taskName,
logger: logger,
sink: make(chan chan progress.Report),
done: make(chan struct{}),
}
p.wg.Add(1)
go p.loopA()
return p
}
// loopA runs before Sink() has been called.
func (p *progressLogger) loopA() {
var err error
defer p.wg.Done()
tick := time.NewTicker(100 * time.Millisecond)
defer tick.Stop()
called := false
for stop := false; !stop; {
select {
case ch := <-p.sink:
err = p.loopB(tick, ch)
stop = true
called = true
case <-p.done:
stop = true
case <-tick.C:
line := fmt.Sprintf("%s", p.taskName)
p.logger.Debug(line)
}
}
if err != nil && err != io.EOF {
p.logger.Debug(fmt.Sprintf("%sError: %s\n", p.taskName, err))
} else if called {
p.logger.Debug(fmt.Sprintf("%sOK\n", p.taskName))
}
}
// loopA runs after Sink() has been called.
func (p *progressLogger) loopB(tick *time.Ticker, ch <-chan progress.Report) error {
var r progress.Report
var ok bool
var err error
for ok = true; ok; {
select {
case r, ok = <-ch:
if !ok {
break
}
err = r.Error()
case <-tick.C:
line := fmt.Sprintf("%s", p.taskName)
if r != nil {
line += fmt.Sprintf("(%.0f%%", r.Percentage())
detail := r.Detail()
if detail != "" {
line += fmt.Sprintf(", %s", detail)
}
line += ")"
}
p.logger.Info(line)
}
}
return err
}
func (p *progressLogger) Sink() chan<- progress.Report {
ch := make(chan progress.Report)
p.sink <- ch
return ch
}
func (p *progressLogger) Wait() {
close(p.done)
p.wg.Wait()
}