76 lines
2.3 KiB
JavaScript
76 lines
2.3 KiB
JavaScript
/**
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* AJAX long polling library.
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*
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* @author ajanata
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*/
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cah.longpoll = {};
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cah.longpoll.TIMEOUT = 2 * 60 * 1000;
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// cah.longpoll.TIMEOUT = 5 * 1000;
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cah.longpoll.INITIAL_BACKOFF = 500;
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cah.longpoll.Backoff = cah.longpoll.INITIAL_BACKOFF;
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cah.longpoll.Resume = true;
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cah.longpoll.ErrorCodeHandlers = {};
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cah.longpoll.longPoll = function() {
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cah.log.debug("starting long poll");
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$.ajax({
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complete : cah.longpoll.complete,
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error : cah.longpoll.error,
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success : cah.longpoll.done,
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timeout : cah.longpoll.TIMEOUT,
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url : '/cah/LongPollServlet',
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});
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};
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cah.longpoll.complete = function() {
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if (cah.longpoll.Resume) {
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setTimeout("cah.longpoll.longPoll()", cah.longpoll.Backoff);
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}
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};
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cah.longpoll.done = function(data) {
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cah.log.debug("long poll done", data);
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if (data['error']) {
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// TODO cancel any timers or whatever we may have, and disable interface
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// this probably should be done in the appropriate error code handler because we may not
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// want to always be that extreme.
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if (cah.longpoll.ErrorCodeHandlers[data.error_code]) {
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cah.longpoll.ErrorCodeHandlers[data.error_code](data);
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} else {
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cah.log.error(data.error_message);
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}
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} else {
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// TODO process data
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// var req = pendingRequests[data.serial];
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// if (req && cah.ajax.SuccessHandlers[req.op]) {
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// cah.ajax.SuccessHandlers[req.op](data);
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// } else if (req) {
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// addLogError("Unhandled response for op " + req.op);
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// } else {
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// addLogError("Unknown response for serial " + data.serial);
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// }
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}
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// reset the backoff to normal when there's a successful operation
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cah.longpoll.Backoff = cah.longpoll.INITIAL_BACKOFF;
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};
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cah.longpoll.error = function(jqXHR, textStatus, errorThrown) {
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// TODO deal with this somehow
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debugger;
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cah.log.debug(textStatus);
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cah.longpoll.Backoff *= 2;
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cah.log
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.error("Error communicating with server. Will try again in " + (cah.longpoll.Backoff / 1000)
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+ " second" + (cah.longpoll.Backoff != 1000 ? "s" : "") + ".");
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};
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cah.longpoll.ErrorCodeHandlers.not_registered = function(data) {
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cah.longpoll.Resume = false;
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// TODO disable interface
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cah.log.error("The server seems to have restarted. Any in-progress games have been lost.");
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cah.log.error("You will need to refresh the page to start a new game.");
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};
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