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bug 535136 - improve transition from single-client to multiple-client mode, r=Mardak

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--HG--
extra : rebase_source : 8a667e947aa442e65eec1e13059e7076b00f9878
This commit is contained in:
Mike Connor 2010-03-25 17:24:41 -04:00
parent 8e6f509231
commit 9f9e921640
1 changed files with 59 additions and 0 deletions
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59
services/sync/modules/service.js
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@ -978,6 +978,8 @@ WeaveSvc.prototype = {
// Clear out any scheduled syncs
if (this._syncTimer)
this._syncTimer.clear();
if (this._heartbeatTimer)
this._heartbeatTimer.clear();
// Clear out a sync that's just waiting for idle if we happen to have one
try {
@ -1050,6 +1052,63 @@ WeaveSvc.prototype = {
// Save the next sync time in-case sync is disabled (logout/offline/etc.)
this.nextSync = Date.now() + interval;
// if we're a single client, set up a heartbeat to detect new clients sooner
if (this.numClients == 1)
this._scheduleHeartbeat();
},
/**
* Hits info/collections on the server to see if there are new clients.
* This is only called when the account has one active client, and if more
* are found will trigger a sync to change client sync frequency and update data.
*/
_doHeartbeat: function WeaveSvc__doHeartbeat() {
if (this._heartbeatTimer)
this._heartbeatTimer.clear();
let info = null;
try {
info = new Resource(this.infoURL).get();
if (info && info.success) {
// if clients.lastModified doesn't match what the server has,
// we have another client in play
this._log.trace("Remote timestamp:" + info.obj["clients"] +
" Local timestamp: " + Clients.lastSync);
if (info.obj["clients"] > Clients.lastSync) {
this._log.debug("New clients detected, triggering a full sync");
this.syncOnIdle();
return;
}
}
else {
this._checkServerError(info);
this._log.debug("Heartbeat failed. HTTP Error: " + info.status);
}
} catch(ex) {
// if something throws unexpectedly, not a big deal
this._log.debug("Heartbeat failed unexpectedly: " + ex);
}
// no joy, schedule the next heartbeat
this._scheduleHeartbeat();
},
/**
* Sets up a heartbeat ping to check for new clients. This is not a critical
* behaviour for the client, so if we hit server/network issues, we'll just drop
* this until the next sync.
*/
_scheduleHeartbeat: function WeaveSvc__scheduleNextHeartbeat() {
let interval = MULTI_DESKTOP_SYNC;
if (this.nextSync < Date.now() + interval ||
Status.enforceBackoff)
return;
this._log.trace("Setting up heartbeat, next ping in " +
Math.ceil(interval / 1000) + " sec.");
Utils.delay(function() this._doHeartbeat(), interval, this, "_heartbeatTimer");
},
_syncErrors: 0,