51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
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// Copyright 2019 Drone IO, Inc.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package pubsub
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import (
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"sync"
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"github.com/drone/drone/core"
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)
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type subscriber struct {
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sync.Mutex
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handler chan *core.Message
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quit chan struct{}
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done bool
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}
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func (s *subscriber) publish(event *core.Message) {
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select {
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case <-s.quit:
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case s.handler <- event:
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default:
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// events are sent on a buffered channel. If there
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// is a slow consumer that is not processing events,
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// the buffered channel will fill and newer messages
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// are ignored.
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}
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}
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func (s *subscriber) close() {
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s.Lock()
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if s.done == false {
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close(s.quit)
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s.done = true
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}
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s.Unlock()
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}
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