Synchronization of remote context data
Embodiments described herein provide for a multi-device context store in which context attributes of multiple devices can be synchronized. A first device can transmit a predicate to a second device, where the predicate includes a condition associated with an attribute of a multi-device context store. Upon the occurrence of the condition at the second device, a notification and/or context update can be sent by the second device to the first device. The predicate can also include a code block to be executed upon the occurrence of the condition.
1. A method comprising:
constructing a predicate on a first electronic device, wherein the predicate includes:
an activation condition associated with an attribute stored in a multi-device context store at the first electronic device,
a code block that is programmed to be conditionally executed upon occurrence of the condition, and
a wake flag that indicates whether the occurrence of the condition causes an application processor to wake from a sleep state to execute the code block or whether the occurrence of the condition causes the code block to be placed in a queue that is executed when the application processor wakes from the sleep state;
transmitting the predicate to a second electronic device;
receiving, by the first electronic device, a notice from the second electronic device that the activation condition occurred was based on a detected change to a value of the attribute stored in another instance of the multi-device context store at the second electronic device, the change to the value occurring after processing of transmitted predicate at the second electronic device; and
performing an action on the first electronic device in response to the received notice.
2. An electronic device comprising:
a memory; and
at least one processor configured to:
construct a predicate, wherein the predicate includes;
a condition associated with an attribute stored in a multi-device context store at the electronic device,
a code block that is programmed to be conditionally executed upon occurrence of the condition, and
a wake flag that indicates whether the occurrence of the condition causes an application processor to wake from a sleep state to execute the code block or whether the occurrence of the condition causes the code block to be placed in a queue that is executed when the application processor wakes from the sleep state;
transmit the predicate to a second electronic device;
receive a notice from the second electronic device that the condition was satisfied based on a detected change to a value of the attribute stored in another instance of the multi-device context store at the second electronic device, the change to the value occurring after processing of transmitted predicate at the second electronic device; and
perform an action on the electronic device in response to the notice.
3. The electronic device as in claim 2 , wherein the action comprises pausing or resuming a process being executed on the electronic device.
4. A non-transitory machine-readable medium storing instructions to cause one or more processors to perform operations comprising:
constructing a predicate on a first electronic device, the predicate including:
a condition associated with an attribute of a plurality of attributes stored in a multi-device context store at the first electronic device, wherein the plurality of attributes stored in the multi-device context store comprise context information obtained from multiple electronic devices,
a code block that is programmed to be conditionally executed upon occurrence of the condition, and
a wake flag that indicates whether the occurrence of the condition causes an application processor to wake from a sleep state to execute the code block or whether the occurrence of the condition causes the code block to be placed in a queue that is executed when the application processor wakes from the sleep state;
transmitting the predicate to a second electronic device;
receiving, by the first electronic device, a notice from the second electronic device that the condition was satisfied based on a detected change to a value of the attribute stored in another instance of the multi-device context store at the second electronic device, the change to the value occurring after processing of the transmitted predicate at the second electronic device; and
performing an action on the first electronic device in response to the received notice.
5. The non-transitory machine-readable medium as in claim 1 , the operations further comprising transmitting the predicate to the second electronic device by transmitting the predicate to a daemon on the first electronic device associated with the multi-device context store and transmitting the predicate to the second electronic device via the daemon.
6. The non-transitory machine-readable medium as in claim 4 , wherein the predicate is associated with a set of remote devices to which the predicate is to be transmitted.
7. The non-transitory machine-readable medium as in claim 6 , wherein the predicate is a compound predicate that includes multiple conditions or code blocks and the compound predicate is registered with a scheduler at the second electronic device.
8. The non-transitory machine-readable medium as in claim 6 , wherein the attribute of the multi-device context store is a context attribute associated with the first electronic device or associated with a third electronic device.
9. The non-transitory machine-readable medium as in claim 6 , wherein the attribute of the multi-device context store is a context attribute associated with the second electronic device.
10. The non-transitory machine-readable medium as in claim 4 , wherein the condition can include a key path that specifies a context attribute and an identifier for the device for which the context is to be monitored.
11. The non-transitory machine-readable medium as in claim 10 , wherein devices to which the predicate is to be transmitted differs from the devices specified by the key path.
12. The non-transitory machine-readable medium as in claim 4 , wherein the notice from the second electronic device that the condition was satisfied includes a snapshot of changes to the context of the second electronic device.
13. The non-transitory machine-readable medium as in claim 12 , wherein the first electronic device is to perform an action in response to a change in the snapshot.
14. The non-transitory machine-readable medium as in claim 13 , wherein the action includes to execute a code block or callback on the first electronic device.
15. The non-transitory machine-readable medium as in claim 14 , wherein to execute the code block or callback on the first electronic device includes to determine whether to wake one of the one or more processors from a low-power state.
16. The non-transitory machine-readable medium as in claim 4 , wherein the notice from the second electronic device that the condition was satisfied is received via a wireless network advertisement broadcast by the second electronic device.
17. The non-transitory machine-readable medium as in claim 15 , wherein the notice from the second electronic device that the condition was satisfied includes an updated attribute stored in the other instance of the multi-device context store.
18. The non-transitory machine-readable medium of claim 4 , wherein the operations further comprise:
synchronizing the multi-device context store of the first electronic device with the other instance of the multi-device context store at the second electronic device.