132 lines
2.8 KiB
Go
132 lines
2.8 KiB
Go
/*
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Copyright (c) 2014-2015 VMware, Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package importx
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import (
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"context"
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"fmt"
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"net/url"
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"sync"
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"sync/atomic"
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"time"
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"github.com/vmware/govmomi/object"
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"github.com/vmware/govmomi/vim25"
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"github.com/vmware/govmomi/vim25/progress"
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"github.com/vmware/govmomi/vim25/types"
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)
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type ovfFileItem struct {
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url *url.URL
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item types.OvfFileItem
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ch chan progress.Report
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}
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func (o ovfFileItem) Sink() chan<- progress.Report {
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return o.ch
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}
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type leaseUpdater struct {
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client *vim25.Client
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lease *object.HttpNfcLease
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pos int64 // Number of bytes
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total int64 // Total number of bytes
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done chan struct{} // When lease updater should stop
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wg sync.WaitGroup // Track when update loop is done
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}
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func newLeaseUpdater(client *vim25.Client, lease *object.HttpNfcLease, items []ovfFileItem) *leaseUpdater {
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l := leaseUpdater{
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client: client,
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lease: lease,
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done: make(chan struct{}),
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}
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for _, item := range items {
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l.total += item.item.Size
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go l.waitForProgress(item)
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}
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// Kickstart update loop
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l.wg.Add(1)
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go l.run()
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return &l
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}
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func (l *leaseUpdater) waitForProgress(item ovfFileItem) {
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var pos, total int64
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total = item.item.Size
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for {
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select {
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case <-l.done:
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return
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case p, ok := <-item.ch:
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// Return in case of error
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if ok && p.Error() != nil {
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return
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}
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if !ok {
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// Last element on the channel, add to total
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atomic.AddInt64(&l.pos, total-pos)
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return
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}
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// Approximate progress in number of bytes
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x := int64(float32(total) * (p.Percentage() / 100.0))
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atomic.AddInt64(&l.pos, x-pos)
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pos = x
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}
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}
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}
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func (l *leaseUpdater) run() {
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defer l.wg.Done()
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tick := time.NewTicker(2 * time.Second)
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defer tick.Stop()
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for {
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select {
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case <-l.done:
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return
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case <-tick.C:
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// From the vim api HttpNfcLeaseProgress(percent) doc, percent ==
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// "Completion status represented as an integer in the 0-100 range."
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// Always report the current value of percent, as it will renew the
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// lease even if the value hasn't changed or is 0.
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percent := int32(float32(100*atomic.LoadInt64(&l.pos)) / float32(l.total))
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err := l.lease.HttpNfcLeaseProgress(context.TODO(), percent)
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if err != nil {
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fmt.Printf("from lease updater: %s\n", err)
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}
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}
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}
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}
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func (l *leaseUpdater) Done() {
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close(l.done)
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l.wg.Wait()
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}
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