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PretendYoureXyzzy/WebContent/js/cah.longpoll.js

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refactor the js code into several files. need to further refactor the ajax handlers, and make the server automatically assemble the list of files the client needs. some sort of dependency ordering needs enforced too.
2011-12-23 02:48:20 +00:00
/**
* AJAX long polling library.
*
* @author ajanata
*/
cah.longpoll = {};
cah.longpoll.TIMEOUT = 2 * 60 * 1000;
properly invalidate sessions when ping timeout occurs so when the user comes back they'll get a new session
2012-01-12 21:07:05 +00:00
// cah.longpoll.TIMEOUT = 30 * 1000;
refactor the js code into several files. need to further refactor the ajax handlers, and make the server automatically assemble the list of files the client needs. some sort of dependency ordering needs enforced too.
2011-12-23 02:48:20 +00:00
cah.longpoll.INITIAL_BACKOFF = 500;
cah.longpoll.Backoff = cah.longpoll.INITIAL_BACKOFF;
cah.longpoll.Resume = true;
cah.longpoll.ErrorCodeHandlers = {};
- change register error message only showing up once instead of repeating every time you try and get an error. it probably should blank when you start typing again though - pull the long polling handlers out to their own file like the ajax response handlers - chat
2011-12-25 03:37:45 +00:00
cah.longpoll.EventHandlers = {};
refactor the js code into several files. need to further refactor the ajax handlers, and make the server automatically assemble the list of files the client needs. some sort of dependency ordering needs enforced too.
2011-12-23 02:48:20 +00:00
cah.longpoll.longPoll = function() {
cah.log.debug("starting long poll");
$.ajax({
complete : cah.longpoll.complete,
error : cah.longpoll.error,
success : cah.longpoll.done,
timeout : cah.longpoll.TIMEOUT,
url : '/cah/LongPollServlet',
});
};
cah.longpoll.complete = function() {
if (cah.longpoll.Resume) {
setTimeout("cah.longpoll.longPoll()", cah.longpoll.Backoff);
}
};
add support for being able to return more than one event in a single long poll request, since the client will poll no more often than every half-second. this could have caused a rather large backlog of events to deliver if chat was active.
2012-01-07 00:43:40 +00:00
cah.longpoll.done = function(data_list) {
cah.log.debug("long poll done", data_list);
refactor the js code into several files. need to further refactor the ajax handlers, and make the server automatically assemble the list of files the client needs. some sort of dependency ordering needs enforced too.
2011-12-23 02:48:20 +00:00
we have to be able to deal with longpoll error data returned not in an array, so make it look like an array if it's an error
2012-01-07 00:49:43 +00:00
var data_list_work;
// we need to handle non-array data, too, so just make it look like an array
more constants instead of immediate strings. add a wrapper around the request parameters so we can use our enum values as the parameter names.
2012-01-17 00:28:21 +00:00
if (data_list[cah.$.LongPollResponse.TIMESTAMP] || data_list[cah.$.LongPollResponse.ERROR]) {
we have to be able to deal with longpoll error data returned not in an array, so make it look like an array if it's an error
2012-01-07 00:49:43 +00:00
data_list_work = {};
data_list_work[0] = data_list;
} else {
data_list_work = data_list;
}
for ( var index in data_list_work) {
var data = data_list_work[index];
more constants instead of immediate strings. add a wrapper around the request parameters so we can use our enum values as the parameter names.
2012-01-17 00:28:21 +00:00
if (data[cah.$.LongPollResponse.ERROR]) {
add support for being able to return more than one event in a single long poll request, since the client will poll no more often than every half-second. this could have caused a rather large backlog of events to deliver if chat was active.
2012-01-07 00:43:40 +00:00
// TODO cancel any timers or whatever we may have, and disable interface
// this probably should be done in the appropriate error code handler because we may not
// want to always be that extreme.
more constants instead of immediate strings. add a wrapper around the request parameters so we can use our enum values as the parameter names.
2012-01-17 00:28:21 +00:00
var errorCode = data[cah.$.LongPollResponse.ERROR_CODE];
if (cah.longpoll.ErrorCodeHandlers[errorCode]) {
cah.longpoll.ErrorCodeHandlers[errorCode](data);
add support for being able to return more than one event in a single long poll request, since the client will poll no more often than every half-second. this could have caused a rather large backlog of events to deliver if chat was active.
2012-01-07 00:43:40 +00:00
} else {
more constants instead of immediate strings. add a wrapper around the request parameters so we can use our enum values as the parameter names.
2012-01-17 00:28:21 +00:00
cah.log.error(cah.$.ErrorCode_msg[errorCode]);
add support for being able to return more than one event in a single long poll request, since the client will poll no more often than every half-second. this could have caused a rather large backlog of events to deliver if chat was active.
2012-01-07 00:43:40 +00:00
}
refactor the js code into several files. need to further refactor the ajax handlers, and make the server automatically assemble the list of files the client needs. some sort of dependency ordering needs enforced too.
2011-12-23 02:48:20 +00:00
} else {
more constants instead of immediate strings. add a wrapper around the request parameters so we can use our enum values as the parameter names.
2012-01-17 00:28:21 +00:00
var event = data[cah.$.LongPollResponse.EVENT];
if (cah.longpoll.EventHandlers[event]) {
cah.longpoll.EventHandlers[event](data);
add support for being able to return more than one event in a single long poll request, since the client will poll no more often than every half-second. this could have caused a rather large backlog of events to deliver if chat was active.
2012-01-07 00:43:40 +00:00
} else {
more constants instead of immediate strings. add a wrapper around the request parameters so we can use our enum values as the parameter names.
2012-01-17 00:28:21 +00:00
cah.log.error("Unhandled event " + event);
add support for being able to return more than one event in a single long poll request, since the client will poll no more often than every half-second. this could have caused a rather large backlog of events to deliver if chat was active.
2012-01-07 00:43:40 +00:00
}
- change register error message only showing up once instead of repeating every time you try and get an error. it probably should blank when you start typing again though - pull the long polling handlers out to their own file like the ajax response handlers - chat
2011-12-25 03:37:45 +00:00
}
refactor the js code into several files. need to further refactor the ajax handlers, and make the server automatically assemble the list of files the client needs. some sort of dependency ordering needs enforced too.
2011-12-23 02:48:20 +00:00
}
// reset the backoff to normal when there's a successful operation
cah.longpoll.Backoff = cah.longpoll.INITIAL_BACKOFF;
};
cah.longpoll.error = function(jqXHR, textStatus, errorThrown) {
// TODO deal with this somehow
cah.log.debug(textStatus);
cah.longpoll.Backoff *= 2;
cah.log
.error("Error communicating with server. Will try again in " + (cah.longpoll.Backoff / 1000)
+ " second" + (cah.longpoll.Backoff != 1000 ? "s" : "") + ".");
};