forked from mururu/fuji
/
subscribe.go
75 lines (64 loc) · 1.81 KB
/
subscribe.go
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// Copyright 2015 Shiguredo Inc. <fuji@shiguredo.jp>
//
// 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 broker
import (
"fmt"
"strings"
"sync"
log "github.com/Sirupsen/logrus"
)
type Subscribed struct {
sync.Mutex
list map[string]byte
}
func NewSubscribed() Subscribed {
s := Subscribed{
list: make(map[string]byte),
}
return s
}
func (s Subscribed) Length() int {
return len(s.list)
}
func (s Subscribed) List() map[string]byte {
return s.list
}
func (s Subscribed) Add(topic string, qos byte) error {
s.Lock()
defer s.Unlock()
if _, ok := s.list[topic]; ok {
log.Warnf("topic %v is already added subscribed, override it", topic)
}
// override if already exists
s.list[topic] = qos
return nil
}
func (s Subscribed) Delete(topic string) error {
s.Lock()
defer s.Unlock()
if _, ok := s.list[topic]; !ok {
return fmt.Errorf("topic %v is not in the subscribed", topic)
}
delete(s.list, topic)
return nil
}
func (b *Broker) AddSubscribed(deviceName string, qos byte) error {
t := strings.Join([]string{b.TopicPrefix, b.GatewayName, deviceName}, "/")
log.Infof("subscribe: %#v", t)
return b.Subscribed.Add(t, qos)
}
func (b *Broker) DeleteSubscribed(deviceName string, qos byte) error {
t := strings.Join([]string{b.TopicPrefix, b.GatewayName, deviceName}, "/")
return b.Subscribed.Delete(t)
}