mirror of https://github.com/docker/cli.git
105 lines
1.8 KiB
Go
105 lines
1.8 KiB
Go
package progress
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import (
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"sort"
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"sync"
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"time"
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)
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type rawProgressWriter interface {
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WriteRawProgress(*Progress) error
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Close() error
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}
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type MultiWriter struct {
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mu sync.Mutex
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items []*Progress
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writers map[rawProgressWriter]struct{}
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meta map[string]interface{}
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}
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func NewMultiWriter(opts ...WriterOption) *MultiWriter {
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mw := &MultiWriter{
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writers: map[rawProgressWriter]struct{}{},
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meta: map[string]interface{}{},
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}
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for _, o := range opts {
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o(mw)
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}
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return mw
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}
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func (ps *MultiWriter) Add(pw Writer) {
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rw, ok := pw.(rawProgressWriter)
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if !ok {
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return
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}
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ps.mu.Lock()
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plist := make([]*Progress, 0, len(ps.items))
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for _, p := range ps.items {
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plist = append(plist, p)
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}
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sort.Slice(plist, func(i, j int) bool {
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return plist[i].Timestamp.Before(plist[j].Timestamp)
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})
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for _, p := range plist {
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rw.WriteRawProgress(p)
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}
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ps.writers[rw] = struct{}{}
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ps.mu.Unlock()
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}
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func (ps *MultiWriter) Delete(pw Writer) {
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rw, ok := pw.(rawProgressWriter)
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if !ok {
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return
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}
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ps.mu.Lock()
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delete(ps.writers, rw)
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ps.mu.Unlock()
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}
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func (ps *MultiWriter) Write(id string, v interface{}) error {
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p := &Progress{
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ID: id,
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Timestamp: time.Now(),
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Sys: v,
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meta: ps.meta,
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}
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return ps.WriteRawProgress(p)
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}
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func (ps *MultiWriter) WriteRawProgress(p *Progress) error {
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meta := p.meta
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if len(ps.meta) > 0 {
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meta = map[string]interface{}{}
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for k, v := range p.meta {
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meta[k] = v
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}
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for k, v := range ps.meta {
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if _, ok := meta[k]; !ok {
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meta[k] = v
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}
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}
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}
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p.meta = meta
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return ps.writeRawProgress(p)
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}
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func (ps *MultiWriter) writeRawProgress(p *Progress) error {
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ps.mu.Lock()
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defer ps.mu.Unlock()
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ps.items = append(ps.items, p)
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for w := range ps.writers {
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if err := w.WriteRawProgress(p); err != nil {
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return err
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}
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}
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return nil
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}
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func (ps *MultiWriter) Close() error {
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return nil
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}
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