@Override
    public void handlerSelector(final SelectorData selectorData) {
        if (!selectorData.getContinued()) {
            CACHED_HANDLE.get().cachedHandle(CacheKeyUtils.INST.getKey(selectorData.getId(), Constants.DEFAULT_RULE), WebSocketRuleHandle.newDefaultInstance());
        }
    }
The type WebSocket plugin data handler.
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-websocket/src/main/java/org/apache/shenyu/plugin/websocket/handler/WebSocketPluginDataHandler.java