| /* |
| Copyright (c) 2014-2015 VMware, Inc. All Rights Reserved. |
| |
| 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 nfc |
| |
| import ( |
| "context" |
| "log" |
| "net/url" |
| "sync" |
| "sync/atomic" |
| "time" |
| |
| "github.com/vmware/govmomi/vim25/progress" |
| "github.com/vmware/govmomi/vim25/types" |
| ) |
| |
| type FileItem struct { |
| types.OvfFileItem |
| URL *url.URL |
| |
| ch chan progress.Report |
| } |
| |
| func NewFileItem(u *url.URL, item types.OvfFileItem) FileItem { |
| return FileItem{ |
| OvfFileItem: item, |
| URL: u, |
| ch: make(chan progress.Report), |
| } |
| } |
| |
| func (o FileItem) Sink() chan<- progress.Report { |
| return o.ch |
| } |
| |
| // File converts the FileItem.OvfFileItem to an OvfFile |
| func (o FileItem) File() types.OvfFile { |
| return types.OvfFile{ |
| DeviceId: o.DeviceId, |
| Path: o.Path, |
| Size: o.Size, |
| } |
| } |
| |
| type LeaseUpdater struct { |
| pos int64 // Number of bytes (keep first to ensure 64 bit aligment) |
| total int64 // Total number of bytes (keep first to ensure 64 bit aligment) |
| |
| lease *Lease |
| |
| done chan struct{} // When lease updater should stop |
| |
| wg sync.WaitGroup // Track when update loop is done |
| } |
| |
| func newLeaseUpdater(ctx context.Context, lease *Lease, info *LeaseInfo) *LeaseUpdater { |
| l := LeaseUpdater{ |
| lease: lease, |
| |
| done: make(chan struct{}), |
| } |
| |
| for _, item := range info.Items { |
| l.total += item.Size |
| go l.waitForProgress(item) |
| } |
| |
| // Kickstart update loop |
| l.wg.Add(1) |
| go l.run() |
| |
| return &l |
| } |
| |
| func (l *LeaseUpdater) waitForProgress(item FileItem) { |
| var pos, total int64 |
| |
| total = item.Size |
| |
| for { |
| select { |
| case <-l.done: |
| return |
| case p, ok := <-item.ch: |
| // Return in case of error |
| if ok && p.Error() != nil { |
| return |
| } |
| |
| if !ok { |
| // Last element on the channel, add to total |
| atomic.AddInt64(&l.pos, total-pos) |
| return |
| } |
| |
| // Approximate progress in number of bytes |
| x := int64(float32(total) * (p.Percentage() / 100.0)) |
| atomic.AddInt64(&l.pos, x-pos) |
| pos = x |
| } |
| } |
| } |
| |
| func (l *LeaseUpdater) run() { |
| defer l.wg.Done() |
| |
| tick := time.NewTicker(2 * time.Second) |
| defer tick.Stop() |
| |
| for { |
| select { |
| case <-l.done: |
| return |
| case <-tick.C: |
| // From the vim api HttpNfcLeaseProgress(percent) doc, percent == |
| // "Completion status represented as an integer in the 0-100 range." |
| // Always report the current value of percent, as it will renew the |
| // lease even if the value hasn't changed or is 0. |
| percent := int32(float32(100*atomic.LoadInt64(&l.pos)) / float32(l.total)) |
| err := l.lease.Progress(context.TODO(), percent) |
| if err != nil { |
| log.Printf("NFC lease progress: %s", err) |
| return |
| } |
| } |
| } |
| } |
| |
| func (l *LeaseUpdater) Done() { |
| close(l.done) |
| l.wg.Wait() |
| } |