problem

花了一点时间搞定了聊天列表。但是人员退出的时候经常出现一下错误，

代码如下

 public void callBack() {
        String returnMsg = RedisProxy.get(ConfigConstant.chat_return_msg.getValue());
        if (!StringUtil.isNullOrEmpty(returnMsg) && returnMsg.contains("{") && returnMsg.contains("}")) {
            NotifyChannel notifyChannel = JSON.parseObject(returnMsg, NotifyChannel.class);

            try {
                /**
                 * 通过服务器端指定的method处理服务器端的聊天列表
                 */
                Method method = this.getClass().getDeclaredMethod(notifyChannel.getMethod(), NotifyChannel.class);
                method.invoke(this, notifyChannel);
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            } catch (IllegalStateException e) {
                e.printStackTrace();
            }
        } else {
            chatHisId.appendText(returnMsg + "\n");
        }
    }


    public void init(NotifyChannel notifyChannel) {
        Map<String, String> chatList = notifyChannel.getChatList();
        List<String> chatListView = new ArrayList<>();
        for (Map.Entry<String, String> entry : chatList.entrySet()) {
            chatListView.add(entry.getValue());
        }
        this.notifyChannel.setChatList(chatList);
        ObservableList<String> strList = FXCollections.observableArrayList(chatListView);
        chatHumanId.setItems(strList);

    }

    public void add(NotifyChannel notifyChannel) {
        Map<String, String> chatList = this.notifyChannel.getChatList();
        chatList.put(notifyChannel.getAddChatRemote(), notifyChannel.getAddChatPerson());
      
        chatHumanId.getItems().add(notifyChannel.getAddChatPerson());
    }

    public void remove(NotifyChannel notifyChannel) {
        Map<String, String> chatList = this.notifyChannel.getChatList();
        chatList.remove(notifyChannel.getAddChatRemote(), notifyChannel.getAddChatPerson());
        chatHumanId.getItems().remove(notifyChannel.getAddChatPerson());

    }

因为javaFX只能通过javaFX的线程去更新UI,但是从报错来看，确实在javaFX线程中，莫名其妙的错误！

在stackoverflow上面找到了相关的解决方法；

How to avoid Not on FX application thread; currentThread = JavaFX Application Thread error?

Calling

Platform.runLater(new Runnable(){
// ...
});
will fix it, too.

shareimprove this answer

改动后如下：

扫描二维码关注公众号，回复： 5113597 查看本文章

   public void add(NotifyChannel notifyChannel) {
        Map<String, String> chatList = this.notifyChannel.getChatList();
        chatList.put(notifyChannel.getAddChatRemote(), notifyChannel.getAddChatPerson());
        Platform.runLater(() -> chatHumanId.getItems().add(notifyChannel.getAddChatPerson()));
    }

    public void remove(NotifyChannel notifyChannel) {
        Map<String, String> chatList = this.notifyChannel.getChatList();
        chatList.remove(notifyChannel.getAddChatRemote(), notifyChannel.getAddChatPerson());
        Platform.runLater(() -> chatHumanId.getItems().remove(notifyChannel.getAddChatPerson()));

    }

这样就不会在报错，目前项目在GitHub上，待完善。

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在做私聊的时候发现上面的callback有根本上的问题，就是它只能回调群聊界面所使用的类，也就是说私聊的内容全部给打印到了群聊里面，让我情何以堪。就像这样：

于是乎！修改了一下类的结构。在这篇文章中：关于netty聊天的callback

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problem

修复一些小bug,并总结到别的文章中

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