Persistent application activation and timer notifications
First Claim
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1. A system comprising memory operatively coupled to one or more processors, the memory storing instructions that perform a method of:
- receiving, from a first instance execution host, a request to persist an application instance;
identifying a system property to re-activate the application instance, the system property comprising a timer;
tracking a state of the application instance from executing to persisted;
persisting the application instance for a duration of the timer;
determining, based on an expiration of the timer, that the application instance is to be running, wherein the expiration of the timer indicates the application instance is to be transitioned back to an executing state;
sending, based on the determination, an activation event to a second instance execution host to cause the second instance execution host to execute the application instance; and
tracking the state of the application instance from persisted to executing.
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Abstract
The present invention extends to methods, systems, and computer program products for persistent application activation and timer notifications. A durable instance manager, instance execution hosts, and an instance store interoperate to transition instances between executing and persisted states. System properties are associated with an instance. System properties can define re-activation conditions, that when satisfied, indicate that an instance is to be re-activated for execution. System properties can define timers as well as indications that instances are in a persisted but ready to run state.
95 Citations
21 Claims
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1. A system comprising memory operatively coupled to one or more processors, the memory storing instructions that perform a method of:
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receiving, from a first instance execution host, a request to persist an application instance; identifying a system property to re-activate the application instance, the system property comprising a timer; tracking a state of the application instance from executing to persisted; persisting the application instance for a duration of the timer; determining, based on an expiration of the timer, that the application instance is to be running, wherein the expiration of the timer indicates the application instance is to be transitioned back to an executing state; sending, based on the determination, an activation event to a second instance execution host to cause the second instance execution host to execute the application instance; and tracking the state of the application instance from persisted to executing. - View Dependent Claims (2, 3, 4, 5, 6, 18, 21)
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7. A computer readable storage device storing instructions that, when executed, are capable of performing a method of:
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receiving, from a first instance execution host, a request to persist an application instance; identifying a system property to re-activate the application instance, the system property comprising a timer; tracking the state of the application instance from executing to persisted; persisting the application instance for a duration of the timer; determining, based on an expiration of the timer, that the application instance is to be, wherein the expiration of the timer indicates the application instance is to be transitioned back to an executing state; sending, based on the determination, an activation event to a second instance execution host to cause the second instance execution host to execute the application instance; and tracking the state of the application instance from persisted to executing. - View Dependent Claims (8, 9, 10, 11, 12, 19)
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13. A computer implemented method comprising:
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receiving, from a first instance execution host, a request to persist an application instance, the request indicative of a graceful shutdown; identifying a system property to re-activate the application instance, the system property comprising a timer; tracking the state of the application instance from executing to persisted; persisting the application instance for a duration of the timer; determining, based on an expiration of the timer, that the application instance is to be running, wherein the expiration of the timer indicates the application instance is to be transitioned back to an executing state; sending, based on the determination, an activation event to a second instance execution host to cause the second instance execution host to execute the application instance; and tracking the state of the application instance from persisted to executing. - View Dependent Claims (14, 15, 16, 17, 20)
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Specification