/*
   Copyright 2020 XiaochengTech

   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 connections

import (
	"net"
	"sync"
)

// 连接的监听器
type Listener struct {
	closed      bool                  // 是否是关闭状态
	tcpListener net.Listener          // TCP监听器
	udpListener *net.UDPConn          // UDP监听器
	channel     chan Packet           // 消息通道
	pool        map[string]Connection // 连接池
	poolLock    sync.RWMutex          // 连接池锁
	poolKeyFunc PoolKeyFunc           // 连接池键的生成函数
}

// 接收消息或连接的通知
type Packet struct {
	Message    []byte     // 消息
	Connection Connection // 连接
	Error      error      // 错误
}

// 连接池的键的生成函数类型
type PoolKeyFunc func(
	transport string,
	address string,
) string