435c0d9fc8
This PR switches the Nomad repository from using govendor to Go modules for managing dependencies. Aspects of the Nomad workflow remain pretty much the same. The usual Makefile targets should continue to work as they always did. The API submodule simply defers to the parent Nomad version on the repository, keeping the semantics of API versioning that currently exists.
147 lines
3 KiB
Go
147 lines
3 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 nfc
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import (
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"context"
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"log"
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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/vim25/progress"
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"github.com/vmware/govmomi/vim25/types"
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)
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type FileItem struct {
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types.OvfFileItem
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URL *url.URL
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ch chan progress.Report
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}
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func NewFileItem(u *url.URL, item types.OvfFileItem) FileItem {
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return FileItem{
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OvfFileItem: item,
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URL: u,
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ch: make(chan progress.Report),
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}
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}
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func (o FileItem) Sink() chan<- progress.Report {
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return o.ch
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}
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// File converts the FileItem.OvfFileItem to an OvfFile
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func (o FileItem) File() types.OvfFile {
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return types.OvfFile{
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DeviceId: o.DeviceId,
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Path: o.Path,
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Size: o.Size,
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}
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}
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type LeaseUpdater struct {
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lease *Lease
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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(ctx context.Context, lease *Lease, info *LeaseInfo) *LeaseUpdater {
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l := LeaseUpdater{
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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 info.Items {
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l.total += 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 FileItem) {
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var pos, total int64
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total = 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.Progress(context.TODO(), percent)
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if err != nil {
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log.Printf("NFC lease progress: %s", err)
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return
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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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