我是 Node.js 和一般异步编程的新手,我有一个问题。我需要一个递归循环中的连续工作服务器,这些步骤将始终如一地执行,并且每个阶段都应该包括通过 websotskets 异步接收数据(这已经理解),或者在计时器到期时进入下一个阶段。我知道这不是一项微不足道的任务,而是如何实现它,哪些库可以提供帮助?我试图了解Step.js和 Node.js 事件,这就是我需要的吗?
如果我同步写了所有这些:
//CODE FOR STACKOVERFLOW
var previous_round = 'qwerty';// this is string, selected in previous cycle
var round_users = users;// 'users' is array of soceket.id all connected users and here a put them into new array 'round_users' with sockets for current cycle
io.sockets.emit('users_round', { number: round_users.length }); // send to users information about number of users in new round
for (var i = 0; i < round_users.length; i++) {
io.sockets.socket(round_users[i]).emit('round', { text: previous_round });//for each socket in 'round_users' emit event to enter chat message
} // and send selected in previous round message
var messages = []; // array of users messages
//now we must listen users events and start timer for next stage
//listen users events
for (var i = 0; i < round_users.length; i++) {
io.sockets.socket(round_users[i]).on('message', function (data) {
messages[messages.length] = data.text;//write text from users to array
if (messages.length == round_users.length) { /* GO TO NEXT STAGE */ } // it's after previous operation in this function
});
}
//or set timeout
setTimeout(/* GO TO NEXT STAGE */,15000);
for (var i = 0; i < round_users.length; i++) {
io.sockets.socket(round_users[i]).emit('voting', { messages_array: messages });//for each socket in 'round_users' emit event to vote perfect chat message
} // and send messages, which they send to server
//i'm not quite sure about this decision of vote counting :-)
var votes = []; //array with users votes
for (var i = 0; i < messages.length; i++) {
votes[i] = 0;
}
//now we must listen users events and start timer
//listen users events
for (var i = 0; i < round_users.length; i++) {
io.sockets.socket(round_users[i]).on('vote', function (data) {
votes[data.number]++;//increment selected message
if (votes.length == messages.length) { /* GO TO NEXT STAGE */ } // it's after previous operation in this function
});
}
//or set timeout
setTimeout(/* GO TO NEXT STAGE */,10000);
var max_id = 0; //now select max number from 'votes' array
for (var i = 0; i < votes.length; i++) {
if (votes[i]>votes[max_id]) {max_id = i;} //yet without the same values
}
var previous_round = messages[max_id]; //set up string value of selected message
//restart cycle
pastebin 上的这段代码带有语法高亮