Substituting window endpoints using a health monitor

A computing system, comprising:

• a processor;
• and
• a computer-readable storage medium having computer-executable instructions stored thereupon which, when executed on the processor, cause the processor to
• provide a health monitor, and
• provide a request manager,
• the request manager configured to
• establish a target number of substitution endpoints, and
• transmit a request to the health monitor to release a substitution endpoint of a plurality of health monitor endpoints to the request manager to substitute a working window endpoint of the working window endpoints with the substitution endpoint that was released, and
• the health monitor configured to
• establish a set of substitution endpoints based on the target number of substitution endpoints, the set of substitution endpoints available for use as substitutes for the working window endpoints currently in service to handle data requests and wherein each substitution endpoint is currently operating within predetermined parameters and is not currently in service to handle data requests,
• maintain the set of substitution endpoints by periodically querying a status of each endpoint of the set of substitution endpoints and removing the endpoint from the set of substitution endpoints when the endpoint is not operating within the predetermined parameters, wherein removing the endpoint from the set of substitution endpoints makes the endpoint an idle endpoint unavailable for use as a substitute for a working window endpoint,
• receive the request to release the substitution endpoint,
• identify at least one of the set of substitution endpoints as a health monitor endpoint to be released, and
• release the identified substitution endpoint to the request manager
• wherein the health monitor is configured to maintain the set of substitution endpoints by
• receiving an awake message to switch the health monitor from an idle state to an active state,
• determining an endpoint iteration to query,
• sending a status request to substitution endpoints in the endpoint iteration to query,
• receiving the status from the substitution endpoints in the endpoint iteration to query,
• updating the status of the substitution endpoints in the endpoint iteration to query, and
• returning to the idle state.

A computer-implemented method, comprising:

• providing a health monitor;
• and
• providing a request manager,
• the request manager configured to
• monitor working window endpoints currently in service to handle data requests,
• establish a target number of substitution endpoints, and
• transmit a request to the health monitor to release a substitution endpoint of a plurality of substitution endpoints to the request manager to substitute a working window endpoint of the working window endpoints with the substitution endpoint that was released;
• and
• the health monitor configured to
• establish the plurality of substitution endpoints based on the target number of substitution endpoints, the plurality of substitution endpoints available for use as substitutes for the working window endpoints and wherein each of the plurality of substitution endpoints is currently operating within predetermined parameters and is not currently in service to handle data requests,
• maintain the plurality of substitution endpoints by periodically querying a status of each endpoint of the plurality of substitution endpoints and removing the endpoint from the plurality of substitution endpoints when the endpoint is not operating within the predetermined parameters, wherein removing the endpoint from the plurality of substitution endpoints makes the endpoint an idle endpoint unavailable for use as a substitute for the working window endpoint,
• receive the request to release the substitution endpoint of the plurality of substitution endpoints,
• identify the substitution endpoint of the plurality of substitution endpoints to be released,
• release the identified substitution endpoint to the request manager, and
• transmit an available message to the request manager to notify the request manager that a number of the substitution endpoints available for substitution has increased from zero to at least one
• wherein the health monitor is further configured to maintain the plurality of substitution endpoints by:
• receiving an awake message to switch the health monitor from an idle state to an active state,
• determining an endpoint iteration to query,
• sending a status request to the substitution endpoints in the endpoint iteration to query,
• receiving the status from the substitution endpoints in the endpoint iteration to query,
• updating the status of the substitution endpoints in the endpoint iteration to query, and
• returning to the idle state.