harness-drone/livelog/livelog.go

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2019-02-19 23:56:41 +00:00
// Copyright 2019 Drone.IO Inc. All rights reserved.
// Use of this source code is governed by the Drone Non-Commercial License
// that can be found in the LICENSE file.
2019-02-28 07:07:13 +00:00
// +build !oss
2019-02-19 23:56:41 +00:00
package livelog
import (
"context"
"errors"
"sync"
"github.com/drone/drone/core"
)
// error returned when a stream is not registered with
// the streamer.
var errStreamNotFound = errors.New("stream: not found")
type streamer struct {
sync.Mutex
streams map[int64]*stream
}
// New returns a new in-memory log streamer.
func New() core.LogStream {
return &streamer{
streams: make(map[int64]*stream),
}
}
func (s *streamer) Create(ctx context.Context, id int64) error {
s.Lock()
s.streams[id] = newStream()
s.Unlock()
return nil
}
func (s *streamer) Delete(ctx context.Context, id int64) error {
s.Lock()
stream, ok := s.streams[id]
if ok {
delete(s.streams, id)
}
s.Unlock()
if !ok {
return errStreamNotFound
}
return stream.close()
}
func (s *streamer) Write(ctx context.Context, id int64, line *core.Line) error {
s.Lock()
stream, ok := s.streams[id]
s.Unlock()
if !ok {
return errStreamNotFound
}
return stream.write(line)
}
func (s *streamer) Tail(ctx context.Context, id int64) (<-chan *core.Line, <-chan error) {
s.Lock()
stream, ok := s.streams[id]
s.Unlock()
if !ok {
return nil, nil
}
return stream.subscribe(ctx)
}
func (s *streamer) Info(ctx context.Context) *core.LogStreamInfo {
s.Lock()
defer s.Unlock()
info := &core.LogStreamInfo{
Streams: map[int64]int{},
}
for id, stream := range s.streams {
stream.Lock()
info.Streams[id] = len(stream.list)
stream.Unlock()
}
return info
}