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| Provides core support for scheduling and interacting with background activity. |
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| Package Specification</h2> |
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| This package specifies API for scheduling background tasks, or jobs. Jobs can be |
| scheduled for immediate execution, or for execution after a specified delay. Once |
| scheduled, jobs can be queried, canceled, or suspended. Rules can be attached to |
| jobs to indicate when they can run, and whether they can run simultaneously with other |
| jobs. This package also includes a generic locking facility that includes support for |
| detecting and responding to deadlock. |
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| @since 3.0 |
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