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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 internal
import "sync"
// ClientHandlerMap is a simple concurrent-safe map for the client type
type ClientHandlers struct {
handlers map[Closable]bool
l *sync.RWMutex
}
func NewClientHandlers() ClientHandlers {
return ClientHandlers{
handlers: map[Closable]bool{},
l: &sync.RWMutex{},
}
}
func (h *ClientHandlers) Add(c Closable) {
h.l.Lock()
defer h.l.Unlock()
h.handlers[c] = true
}
func (h *ClientHandlers) Del(c Closable) {
h.l.Lock()
defer h.l.Unlock()
delete(h.handlers, c)
}
func (h *ClientHandlers) Val(c Closable) bool {
h.l.RLock()
defer h.l.RUnlock()
return h.handlers[c]
}
func (h *ClientHandlers) Close() {
h.l.Lock()
handlers := make([]Closable, 0, len(h.handlers))
for handler := range h.handlers {
handlers = append(handlers, handler)
}
h.l.Unlock()
for _, handler := range handlers {
handler.Close()
}
}