package com.qianwen.core.websocket.holder;

import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.handler.WebSocketHandlerDecorator;

/**
 * 一个WebSocketHandler，(装饰器模式)，处理WebSocketSession的存取和关闭
 */
public class MapSessionWebSocketHandlerDecorator extends WebSocketHandlerDecorator {
    private final SessionKeyGenerator sessionKeyGenerator;

    public MapSessionWebSocketHandlerDecorator(WebSocketHandler delegate, SessionKeyGenerator sessionKeyGenerator) {
        super(delegate);
        this.sessionKeyGenerator = sessionKeyGenerator;
    }

    public void afterConnectionEstablished(final WebSocketSession session) throws Exception {
        Object sessionKey = this.sessionKeyGenerator.sessionKey(session);
        WebSocketSessionHolder.addSession(sessionKey, session);
    }

    public void afterConnectionClosed(final WebSocketSession session, CloseStatus closeStatus) throws Exception {
        Object sessionKey = this.sessionKeyGenerator.sessionKey(session);
        WebSocketSessionHolder.removeSession(sessionKey, session);
        JsonMessageFilterHolder.closeSession(session);
    }
}