ZMQ可以通过pub-sub套接字将消息发布到特定客户端吗? [英] Can ZMQ publish message to specific client by pub-sub socket?
问题描述
我正在使用pub/sub套接字，当前服务器订阅字节[0](所有主题) 而客户端订阅字节[16]-将特定标头作为主题
I am using pub/Sub Socket and currently the server subscribe byte[0] (all topics) while client subscribe byte[16] - a specific header as topic
但是，我无法停止客户端订阅可以接收所有其他消息的字节[0].
However, I cannot stop client to subscribe byte[0] which can receive all other messages.
我的应用程序就像一个应用程序游戏，它具有一个使用ZMQ作为连接的单个服务器 而且许多客户端都有一个ZMQ套接字与服务器通信.
My application is a like a app game which has one single server using ZMQ as connection and many clients have a ZMQ sockets to talk with server.
在这种情况下，我应该使用哪种模式或插槽?
What pattern or socket I should use in this case?
谢谢
推荐答案
"... 无法停止客户端以订阅字节[0]，该字节可以接收所有其他消息. "
" ... cannot stop client to subscribe byte[0] which can receive all other messages."
对于ZMQ PUB / SUB 正式通信模式原型， SUB 客户必须提交其订阅请求(通过zmq_setsockopt()).
For the ZMQ PUB/SUB Formal Communication Pattern archetype, the SUB client has to submit it's subscription request ( via zmq_setsockopt() ).
PUB -一侧(游戏服务器)没有选择从其一侧进行操作.
PUB-side ( a Game Server ) has got no option to do that from it's side.
在创建新的SUB套接字时没有订阅状态，因此是绝对限制性的过滤器，因此不会传递任何消息. (有关以下SUBSCRIBE/UNSUBSCRIBE引用方法的详细信息，请参见
There is no-subscription state right on a creation of a new SUB socket, thus an absolutely restrictive filter, thas no message pass through. ( For furhter details on methods for SUBSCRIBE / UNSUBSCRIBE ref. below )
int zmq_setsockopt ( void *socket,
int option_name,
const void *option_value,
size_t option_len
);
Caution: only ZMQ_SUBSCRIBE
ZMQ_UNSUBSCRIBE
ZMQ_LINGER
take effect immediately,
other options are active only for subsequent socket bind/connects.
ZMQ_SUBSCRIBE :建立邮件过滤器
ZMQ_SUBSCRIBE选项应在ZMQ_SUB套接字上建立一个新的消息过滤器.新创建的ZMQ_SUB套接字将过滤掉所有传入的消息，因此您应该调用此选项以建立初始消息过滤器.
The ZMQ_SUBSCRIBE option shall establish a new message filter on a ZMQ_SUB socket. Newly created ZMQ_SUB sockets shall filter out all incoming messages, therefore you should call this option to establish an initial message filter.
长度为零的空 option_value 将预订所有传入消息.
An empty option_value of length zero shall subscribe to all incoming messages.
非空 option_value必须预订所有带有指定前缀的开始消息.
A non-empty option_value shall subscribe to all messages beginning with the specified prefix.
可以在单个ZMQ_SUB套接字上附加多个过滤器，在这种情况下，如果消息与至少一个过滤器匹配，则应接受该消息.
Multiple filters may be attached to a single ZMQ_SUB socket, in which case a message shall be accepted if it matches at least one filter.
ZMQ_UNSUBSCRIBE :删除邮件过滤器
ZMQ_UNSUBSCRIBE选项应删除ZMQ_SUB套接字上的现有消息过滤器.指定的过滤器必须匹配，该过滤器是先前使用ZMQ_SUBSCRIBE选项建立的现有过滤器.如果套接字具有连接同一过滤器的多个实例，则ZMQ_UNSUBSCRIBE选项应仅删除一个实例，其余实例保持原位并起作用.
The ZMQ_UNSUBSCRIBE option shall remove an existing message filter on a ZMQ_SUB socket. The filter specified must match an existing filter previously established with the ZMQ_SUBSCRIBE option. If the socket has several instances of the same filter attached the ZMQ_UNSUBSCRIBE option shall remove only one instance, leaving the rest in place and functional.
可以通过扩展消息传递层并添加控制模式套接字来实现，该套接字将承载服务器启动的客户端ZMQ_SUB消息过滤设置.
This is possible via extending the messaging layer and adding a control-mode socket, that will carry server-initiated settings for the client ZMQ_SUB messages filtering.
ZMQ_SUB客户端代码在收到服务器指定的新的ZMQ_SUBSCRIBE/ZMQ_UNSUBSCRIBE设置后，将简单地处理该请求并相应地添加zmq_setsockopt().
Upon receiving a new, the server-dictated, ZMQ_SUBSCRIBE/ZMQ_UNSUBSCRIBE setting, the ZMQ_SUB client side code will simply handle that request and add zmq_setsockopt() accordingly.
这种方法由FSA驱动的语法还有很多其他的可能性，因此将允许任何Game Server/Game Community顺利地采用这种方式.
FSA-driven grammars for this approach are rich of further possibilites, so will allow any Game Server / Game Community to smoothly go this way.
ZeroMQ是一个乐高风格元素的库，可以组装成更大的图片.
ZeroMQ is rather a library of LEGO-style elements to get assembled into a bigger picture.
期望这样的智能库具有一个可以容纳所有对象的 ninja- ，这看起来更近了 oxymoron .
Expecting such a smart library to have a one-size-fits-all ninja-element is on a closer look an oxymoron.
因此，要避免"永无止境的故事"中添加"，尽管这个...还有那个... "
So, to avoid a "Never-ending-story" of adding "although this ... and also that ..."
-
查看所有要求和&端到端可扩展解决方案的 list 功能
Review all requirements and & list features for the end-to-end scaleable solution,
设计消息传递概念& 验证，使其符合列出的所有要求&涵盖[1]
Design a messaging concept & validate it to meet all the listed requirements & cover all features in [1]
实施 [2]
测试 [3]& 正确，它满足1:1的端到端规范[1]
Test [3] & correct it for meeting 1:1 the end-to-end specification [1]
享受它.您已经正确完成了端到端的操作.
Enjoy it. You have done it end-to-end right.
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