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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Jetpack SDK.
*
* The Initial Developer of the Original Code is
* Atul Varma <atul@mozilla.com>.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Atul Varma <atul@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
"use strict";
var {Cc,Cm,Ci,components} = require("chrome");
var file = require("api-utils/file");
// A global registry of all Jetpack Programs that we're responsible
// for loading and unloading. Keys are XPCOM contract IDs of
// the harness services of Jetpack Programs, values are the
// wrappedJSObject of the harness services themselves.
var gServices = {};
var manager = Cm;
manager.QueryInterface(Ci.nsIComponentRegistrar);
// Attempts to unload and then unregister the XPCOM component with the
// given contract ID, if it is managed by us.
function maybeUnload(contractID) {
if (contractID in gServices) {
try {
gServices[contractID].unload();
} catch (e) {
console.exception(e);
}
var classID = gServices[contractID].classID;
delete gServices[contractID];
maybeUnregister(contractID, classID);
}
}
// Attempts to unregister the XPCOM component with the given
// contract ID and class ID, if it is managed by us.
function maybeUnregister(contractID, classID) {
try {
var factory = manager.getClassObjectByContractID(contractID,
Ci.nsIFactory);
manager.unregisterFactory(classID, factory);
} catch (e) {
console.exception(e);
}
}
// A quit callable that is passed to the main() function of any
// Jetpack Program we manage. Whenever said program quits, we will
// automatically take care of unloading and unregistering it.
function makeQuit(contractID) {
return function quit(status) {
maybeUnload(contractID);
};
}
function logError(e) {
console.exception(e);
}
function makeUnloader(contractID) {
return {unload: function unload() { maybeUnload(contractID); }};
}
// The main public function of this module; given a JSON harness options
// blob and a root directory of where the Jetpack Program
// is installed, takes care of loading the program, running it, and
// unloading its resources when they're no longer needed.
exports.run = function run(options, rootDirPath, dump) {
var harnessService;
var contractID = options.bootstrap.contractID;
var classID = components.ID(options.bootstrap.classID);
maybeUnload(contractID);
options.runImmediately = true;
var rootDir = Cc["@mozilla.org/file/local;1"]
.createInstance(Ci.nsILocalFile);
rootDir.initWithPath(rootDirPath);
// Note that we're reusing our own bootstrapping code here, rather
// than directly invoking the target Jetpack Program's bootstrapping
// infrastructure. If one works differently than the other,
// we could have problems, but for now we'll assume that this
// bootstrapping infrastructure is stable.
var HarnessService = packaging.buildHarnessService(rootDir,
dump,
logError,
makeQuit(contractID),
options);
var factory = HarnessService.prototype._xpcom_factory;
var proto = HarnessService.prototype;
manager.registerFactory(proto.classID,
proto.classDescription,
proto.contractID,
factory);
try {
harnessService = factory.createInstance(null, Ci.nsISupports);
harnessService = harnessService.wrappedJSObject;
gServices[contractID] = harnessService;
harnessService.load();
return makeUnloader(contractID, classID);
} catch (e) {
console.exception(e);
return null;
}
};
// When this module is unloaded, shut down all currently-running
// Jetpack Programs we manage and free their resources.
require("unload").when(
function() {
var argLists = [];
for (contractID in gServices)
argLists.push([contractID, gServices[contractID].classID]);
argLists.forEach(
function(args) {
maybeUnload.apply(undefined, args);
});
});
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