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fac0e16996
* Add linter staticcheck Co-authored-by: 6543 <6543@obermui.de>
76 lines
1.1 KiB
Go
76 lines
1.1 KiB
Go
package pubsub
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import (
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"context"
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"sync"
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)
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type subscriber struct {
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receiver Receiver
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}
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type publisher struct {
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sync.Mutex
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topics map[string]*topic
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}
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// New creates an in-memory publisher.
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func New() Publisher {
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return &publisher{
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topics: make(map[string]*topic),
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}
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}
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func (p *publisher) Create(c context.Context, dest string) error {
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p.Lock()
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_, ok := p.topics[dest]
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if !ok {
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t := newTopic(dest)
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p.topics[dest] = t
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}
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p.Unlock()
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return nil
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}
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func (p *publisher) Publish(c context.Context, dest string, message Message) error {
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p.Lock()
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t, ok := p.topics[dest]
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p.Unlock()
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if !ok {
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return ErrNotFound
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}
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t.publish(message)
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return nil
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}
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func (p *publisher) Subscribe(c context.Context, dest string, receiver Receiver) error {
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p.Lock()
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t, ok := p.topics[dest]
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p.Unlock()
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if !ok {
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return ErrNotFound
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}
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s := &subscriber{
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receiver: receiver,
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}
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t.subscribe(s)
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select {
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case <-c.Done():
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case <-t.done:
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}
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t.unsubscribe(s)
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return nil
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}
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func (p *publisher) Remove(c context.Context, dest string) error {
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p.Lock()
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t, ok := p.topics[dest]
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if ok {
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delete(p.topics, dest)
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t.close()
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}
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p.Unlock()
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return nil
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}
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