| /* |
| Copyright (c) 2004-2009, The Dojo Foundation All Rights Reserved. |
| Available via Academic Free License >= 2.1 OR the modified BSD license. |
| see: http://dojotoolkit.org/license for details |
| */ |
| |
| |
| if(!dojo._hasResource["dojox.cometd.timesync"]){ |
| dojo._hasResource["dojox.cometd.timesync"]=true; |
| dojo.provide("dojox.cometd.timesync"); |
| dojo.require("dojox.cometd._base"); |
| dojox.cometd.timesync=new function(){ |
| this._window=10; |
| this._lags=[]; |
| this._offsets=[]; |
| this.lag=0; |
| this.offset=0; |
| this.samples=0; |
| this.getServerTime=function(){ |
| return new Date().getTime()+this.offset; |
| }; |
| this.getServerDate=function(){ |
| return new Date(this.getServerTime()); |
| }; |
| this.setTimeout=function(_1,_2){ |
| var ts=(_2 instanceof Date)?_2.getTime():(0+_2); |
| var tc=ts-this.offset; |
| var _3=tc-new Date().getTime(); |
| if(_3<=0){ |
| _3=1; |
| } |
| return setTimeout(_1,_3); |
| }; |
| this._in=function(_4){ |
| var _5=_4.channel; |
| if(_5&&_5.indexOf("/meta/")==0){ |
| if(_4.ext&&_4.ext.timesync){ |
| var _6=_4.ext.timesync; |
| var _7=new Date().getTime(); |
| var l=(_7-_6.tc-_6.p)/2-_6.a; |
| var o=_6.ts-_6.tc-l; |
| this._lags.push(l); |
| this._offsets.push(o); |
| if(this._offsets.length>this._window){ |
| this._offsets.shift(); |
| this._lags.shift(); |
| } |
| this.samples++; |
| l=0; |
| o=0; |
| for(var i in this._offsets){ |
| l+=this._lags[i]; |
| o+=this._offsets[i]; |
| } |
| this.offset=parseInt((o/this._offsets.length).toFixed()); |
| this.lag=parseInt((l/this._lags.length).toFixed()); |
| } |
| } |
| return _4; |
| }; |
| this._out=function(_8){ |
| var _9=_8.channel; |
| if(_9&&_9.indexOf("/meta/")==0){ |
| var _a=new Date().getTime(); |
| if(!_8.ext){ |
| _8.ext={}; |
| } |
| _8.ext.timesync={tc:_a,l:this.lag,o:this.offset}; |
| } |
| return _8; |
| }; |
| }; |
| dojox.cometd._extendInList.push(dojo.hitch(dojox.cometd.timesync,"_in")); |
| dojox.cometd._extendOutList.push(dojo.hitch(dojox.cometd.timesync,"_out")); |
| } |
