mailiverse/web/WebContent/js/mDispatch.js

158 lines
3.5 KiB
JavaScript
Raw Normal View History

2013-07-21 13:40:17 -04:00
mDispatch = {
log: function()
{
// console.log.apply(console, arguments);
},
mode: 'sync',
onCalculateEventEnd : null,
onCalculateEventBegin : null,
asyncCallbacks: {},
asyncCallbackId: 0,
numAsyncCalculations:0,
handleResponse: function(data)
{
mDispatch.numAsyncCalculations--;
if (window.onCalculateEventEnd)
window.onCalculateEventEnd(mDispatch.numAsyncCalculations);
var callback = mDispatch.asyncCallbacks[data.callback];
delete mDispatch.asyncCallbacks[data.callback];
mDispatch.log("onmessage ",data.callback,data.original.cmd);
if (callback)
if (data.exception)
callback.invoke(new Error(data.exception));
else
callback.invoke(data.result);
},
onWorkerResponse: function(message)
{
var data = message.data;
if (data.original.cmd == 'ping')
{
if (mDispatch.mode != 'native')
{
mDispatch.log("ping received switching to worker mode");
mDispatch.mode = 'worker';
}
}
else
{
mDispatch.handleResponse(data);
}
},
dispatch: function(cmd, a, force)
{
mDispatch.numAsyncCalculations++;
if (window.onCalculateEventBegin)
window.onCalculateEventBegin(mDispatch.numAsyncCalculations);
var callback = a[0];
var args = Array.prototype.slice.call(a,1);
force = (force == undefined) ? false : force;
var mode = mDispatch.mode;
if (mode == 'worker' && startsWith(cmd,'srp'))
mode = 'async';
if (mode == 'sync')
{
try
{
mDispatch.log("sync",cmd);
var result = mSupport[cmd].apply(null, args);
callback.invoke(result);
}
catch (exception)
{
if (cmd != 'ping')
if (callback)
callback.invoke(exception);
}
mDispatch.numAsyncCalculations--;
if (window.onCalculateEventEnd)
window.onCalculateEventEnd(mDispatch.numAsyncCalculations);
}
else
if (mode == 'async')
{
var callbackId = mDispatch.asyncCallbackId++;
mDispatch.asyncCallbacks[callbackId] = callback;
setTimeout(
function(){
var request = {cmd:cmd, args:args, callback:callbackId};
var response = {original:request, callback:callbackId};
try
{
response.result = mSupport[cmd].apply(null,args);
}
catch (exception)
{
response.exception = exception;
}
mDispatch.handleResponse(response);
},
0
);
}
else
if (mode == 'worker')
{
var callbackId = mDispatch.asyncCallbackId++;
mDispatch.asyncCallbacks[callbackId] = callback;
mDispatch.log("worker ",callbackId, cmd);
mDispatch.worker.postMessage({cmd:cmd, args:args, callback:callbackId});
}
else
if (mode == 'native')
{
var callbackId = mDispatch.asyncCallbackId++;
mDispatch.asyncCallbacks[callbackId] = callback;
mDispatch.log("native",callbackId, cmd);
mNative.sendRequest({cmd:cmd, args:args, callback:callbackId})
}
},
startWorker: function()
{
if (mDispatch.mode != 'native')
{
mDispatch.log("starting worker");
mDispatch.mode = 'worker';
mDispatch.worker = new Worker('js/mWorker.js');
mDispatch.worker.onmessage = mDispatch.onWorkerResponse;
mDispatch.worker.postMessage({cmd:'ping', args:[], callback:-1});
}
},
startNative: function()
{
if (mDispatch.mode == 'worker')
{
mDispatch.worker.postMessage({cmd:'shutdown'});
}
mDispatch.mode = 'native';
mNative.onResponse = mDispatch.handleResponse;
mNative.sendRequest({cmd:'cout',args:["starting native"], callback:-1});
},
};
$(document).ready(setTimeout(function() { mDispatch.startWorker(); }, 250));