1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/* -*- js-indent-level: 2; indent-tabs-mode: nil -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
import { AppConstants } from "resource://gre/modules/AppConstants.sys.mjs";
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
WinImpl: "resource://gre/modules/TaskSchedulerWinImpl.sys.mjs",
MacOSImpl: "resource://gre/modules/TaskSchedulerMacOSImpl.sys.mjs",
});
ChromeUtils.defineLazyGetter(lazy, "gImpl", () => {
if (AppConstants.platform == "win") {
return lazy.WinImpl;
}
if (AppConstants.platform == "macosx") {
return lazy.MacOSImpl;
}
// Stubs for unsupported platforms
return {
registerTask() {},
deleteTask() {},
deleteAllTasks() {},
};
});
/**
* Interface to a system task scheduler, capable of running a command line at an interval
* independent of the application.
*
* The expected consumer of this component wants to run a periodic short-lived maintenance task.
* These periodic maintenance tasks will be per-OS-level user and run with the OS-level user's
* permissions. (These still need to work across systems with multiple users and the various
* ownership and permission combinations that we see.) This component does not help schedule
* maintenance daemons, meaning long-lived processes.
*
* Currently only implemented for Windows and macOS, on other platforms these calls do nothing.
*
* The implementation will only interact with tasks from the same install of this application.
* - On Windows the native tasks are named like "\<vendor>\<id> <install path hash>",
* e.g. "\Mozilla\Task Identifier 308046B0AF4A39CB"
* - On macOS the native tasks are labeled like "<macOS bundle ID>.<install path hash>.<id>",
* e.g. "org.mozilla.nightly.308046B0AF4A39CB.Task Identifier".
*/
export var TaskScheduler = {
MIN_INTERVAL_SECONDS: 1800,
/**
* Create a scheduled task that will run a command indepedent of the application.
*
* It will run every intervalSeconds seconds, starting intervalSeconds seconds from now.
*
* If the task is unable to run one or more scheduled times (e.g. if the computer is
* off, or the owning user is not logged in), then the next time a run is possible the task
* will be run once.
*
* An existing task with the same `id` will be replaced.
*
* Only one instance of the task will run at once, though this does not affect different
* tasks from the same application.
*
* @param id
* A unique string (including a UUID is recommended) to distinguish the task among
* other tasks from this installation.
* This string will also be visible to system administrators, so it should be a legible
* description, but it does not need to be localized.
*
* @param command
* Full path to the executable to run.
*
* @param intervalSeconds
* Interval at which to run the command, in seconds. Minimum 1800 (30 minutes).
*
* @param {Object} options
* Optional, as are all of its properties:
* {
* options.args
* Array of arguments to pass on the command line. Does not include the command
* itself even if that is considered part of the command line. If missing, no
* argument list is generated.
*
* options.workingDirectory
* Working directory for the command. If missing, no working directory is set.
*
* options.description
* A description string that will be visible to system administrators. This should
* be localized. If missing, no description is set.
*
* options.disabled
* If true the task will be created disabled, so that it will not be run.
* Ignored on macOS: see comments in TaskSchedulerMacOSImpl.jsm.
* Default false, intended for tests.
*
* options.executionTimeoutSec
* Specifies how long (in seconds) the scheduled task can execute for before it is
* automatically stopped by the task scheduler. If a value <= 0 is given, it will be
* ignored.
* This is not currently implemented on macOS.
* On Windows, the default timeout is 72 hours.
*
* options.nameVersion
* Over time, we have needed to change the name format that tasks are registered with.
* When interacting with an up-to-date task, this value can be unspecified and the
* current version of the name format will be used by default. When interacting with
* an out-of-date task using an old naming format, this can be used to specify what
* version of the name should be used. Since the precise naming format is platform
* specific, these version numbers are also platform-specific.
* }
* }
*/
async registerTask(id, command, intervalSeconds, options) {
if (typeof id !== "string") {
throw new Error("id is not a string");
}
if (!Number.isInteger(intervalSeconds)) {
throw new Error("Interval is not an integer");
}
if (intervalSeconds < this.MIN_INTERVAL_SECONDS) {
throw new Error("Interval is too short");
}
return lazy.gImpl.registerTask(id, command, intervalSeconds, options);
},
/**
* Delete a scheduled task previously created with registerTask.
*
* @param {Object} options
* Optional, as are all of its properties:
* {
* options.nameVersion
* Over time, we have needed to change the name format that tasks are registered with.
* When interacting with an up-to-date task, this value can be unspecified and the
* current version of the name format will be used by default. When interacting with
* an out-of-date task using an old naming format, this can be used to specify what
* version of the name should be used. Since the precise naming format is platform
* specific, these version numbers are also platform-specific.
* }
* @throws NS_ERROR_FILE_NOT_FOUND if the task does not exist.
*/
async deleteTask(id, options) {
return lazy.gImpl.deleteTask(id, options);
},
/**
* Delete all tasks registered by this application.
*
* @param {Object} options
* Optional, as are all of its properties:
* {
* options.nameVersion
* Over time, we have needed to change the name format that tasks are registered with.
* When interacting with an up-to-date task, this value can be unspecified and the
* current version of the name format will be used by default. When interacting with
* an out-of-date task using an old naming format, this can be used to specify what
* version of the name should be used. Since the precise naming format is platform
* specific, these version numbers are also platform-specific.
* }
*/
async deleteAllTasks() {
return lazy.gImpl.deleteAllTasks();
},
/**
* Checks if a task exists.
*
* @param id
* A string representing the identifier of the task to look for.
*
* @param {Object} options
* Optional, as are all of its properties:
* {
* options.nameVersion
* Over time, we have needed to change the name format that tasks are registered with.
* When interacting with an up-to-date task, this value can be unspecified and the
* current version of the name format will be used by default. When interacting with
* an out-of-date task using an old naming format, this can be used to specify what
* version of the name should be used. Since the precise naming format is platform
* specific, these version numbers are also platform-specific.
* }
*
* @return
* true if the task exists, otherwise false.
*/
async taskExists(id, options) {
return lazy.gImpl.taskExists(id, options);
},
};
|