| 提交 | 用户 | 时间 | ||
| e7c126 | 1 | package com.iailab.framework.websocket.core.handler; |
| H | 2 | |
| 3 | import cn.hutool.core.util.StrUtil; | |
| 4 | import cn.hutool.core.util.TypeUtil; | |
| 5 | import com.iailab.framework.common.util.json.JsonUtils; | |
| 6 | import com.iailab.framework.tenant.core.util.TenantUtils; | |
| 7 | import com.iailab.framework.websocket.core.listener.WebSocketMessageListener; | |
| 8 | import com.iailab.framework.websocket.core.message.JsonWebSocketMessage; | |
| 9 | import com.iailab.framework.websocket.core.util.WebSocketFrameworkUtils; | |
| 10 | import lombok.extern.slf4j.Slf4j; | |
| 11 | import org.springframework.web.socket.TextMessage; | |
| 12 | import org.springframework.web.socket.WebSocketHandler; | |
| 13 | import org.springframework.web.socket.WebSocketSession; | |
| 14 | import org.springframework.web.socket.handler.TextWebSocketHandler; | |
| 15 | ||
| 16 | import java.lang.reflect.Type; | |
| 17 | import java.util.HashMap; | |
| 18 | import java.util.List; | |
| 19 | import java.util.Map; | |
| 20 | import java.util.Objects; | |
| 21 | import java.util.function.Consumer; | |
| 22 | ||
| 23 | /** | |
| 24 | * JSON 格式 {@link WebSocketHandler} 实现类 | |
| 25 | * | |
| 26 | * 基于 {@link JsonWebSocketMessage#getType()} 消息类型，调度到对应的 {@link WebSocketMessageListener} 监听器。 | |
| 27 | * | |
| 28 | * @author iailab | |
| 29 | */ | |
| 30 | @Slf4j | |
| 31 | public class JsonWebSocketMessageHandler extends TextWebSocketHandler { | |
| 32 | ||
| 33 | /** | |
| 34 | * type 与 WebSocketMessageListener 的映射 | |
| 35 | */ | |
| 36 | private final Map<String, WebSocketMessageListener<Object>> listeners = new HashMap<>(); | |
| 37 | ||
| 38 | @SuppressWarnings({"rawtypes", "unchecked"}) | |
| 39 | public JsonWebSocketMessageHandler(List<? extends WebSocketMessageListener> listenersList) { | |
| 40 | listenersList.forEach((Consumer<WebSocketMessageListener>) | |
| 41 | listener -> listeners.put(listener.getType(), listener)); | |
| 42 | } | |
| 43 | ||
| 44 | @Override | |
| 45 | protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception { | |
| 46 | // 1.1 空消息，跳过 | |
| 47 | if (message.getPayloadLength() == 0) { | |
| 48 | return; | |
| 49 | } | |
| 50 | // 1.2 ping 心跳消息，直接返回 pong 消息。 | |
| 51 | if (message.getPayloadLength() == 4 && Objects.equals(message.getPayload(), "ping")) { | |
| 52 | session.sendMessage(new TextMessage("pong")); | |
| 53 | return; | |
| 54 | } | |
| 55 | ||
| 56 | // 2.1 解析消息 | |
| 57 | try { | |
| 58 | JsonWebSocketMessage jsonMessage = JsonUtils.parseObject(message.getPayload(), JsonWebSocketMessage.class); | |
| 59 | if (jsonMessage == null) { | |
| 60 | log.error("[handleTextMessage][session({}) message({}) 解析为空]", session.getId(), message.getPayload()); | |
| 61 | return; | |
| 62 | } | |
| 63 | if (StrUtil.isEmpty(jsonMessage.getType())) { | |
| 64 | log.error("[handleTextMessage][session({}) message({}) 类型为空]", session.getId(), message.getPayload()); | |
| 65 | return; | |
| 66 | } | |
| 67 | // 2.2 获得对应的 WebSocketMessageListener | |
| 68 | WebSocketMessageListener<Object> messageListener = listeners.get(jsonMessage.getType()); | |
| 69 | if (messageListener == null) { | |
| 70 | log.error("[handleTextMessage][session({}) message({}) 监听器为空]", session.getId(), message.getPayload()); | |
| 71 | return; | |
| 72 | } | |
| 73 | // 2.3 处理消息 | |
| 74 | Type type = TypeUtil.getTypeArgument(messageListener.getClass(), 0); | |
| 75 | Object messageObj = JsonUtils.parseObject(jsonMessage.getContent(), type); | |
| 76 | Long tenantId = WebSocketFrameworkUtils.getTenantId(session); | |
| 77 | TenantUtils.execute(tenantId, () -> messageListener.onMessage(session, messageObj)); | |
| 78 | } catch (Throwable ex) { | |
| 79 | log.error("[handleTextMessage][session({}) message({}) 处理异常]", session.getId(), message.getPayload()); | |
| 80 | } | |
| 81 | } | |
| 82 | ||
| 83 | } | |
