seg_api (3) - Linux Manuals

NAME

Scheduler Implementation API -

Scheduler-specific SEG module implementations use this API to issue events to the Job State Monitor.

Enumerations

enum globus_scheduler_event_generator_error_t { GLOBUS_SEG_ERROR_TYPE_NULL = 1024, GLOBUS_SEG_ERROR_TYPE_ALREADY_SET, GLOBUS_SEG_ERROR_TYPE_INVALID_MODULE, GLOBUS_SEG_ERROR_TYPE_INVALID_FORMAT, GLOBUS_SEG_ERROR_TYPE_OUT_OF_MEMORY, GLOBUS_SEG_ERROR_TYPE_LOADING_MODULE }

Functions

globus_result_t globus_scheduler_event (const char *format,...)

globus_result_t globus_scheduler_event_pending (time_t timestamp, const char *jobid)

globus_result_t globus_scheduler_event_active (time_t timestamp, const char *jobid)

globus_result_t globus_scheduler_event_failed (time_t timestamp, const char *jobid, int failure_code)

globus_result_t globus_scheduler_event_done (time_t timestamp, const char *jobid, int exit_code)

globus_result_t globus_scheduler_event_generator_get_timestamp (time_t *timestamp)

Detailed Description

Scheduler-specific SEG module implementations use this API to issue events to the Job State Monitor.

Events occur whenever a job is placed in the scheduler's queue (PENDING), begins execution (ACTIVE), terminates successfully (DONE), or ends abnormally (FAILED).

A SEG module should register an event with the Globus event driver (most likely using either the Globus Callback or Globus XIO interfaces) in its activation function and then return. All events should be triggered from callbacks. When the SEG detects that it should terminate, it will deactivate the SEG module it started. The SEG module should wait for any outstanding callbacks to subside and before returning from its deactivation function to ensure that all events will be properly dispatched. After deactivation is complete, the SEG will unload the shared module and terminate.

Enumeration Type Documentation

enum globus_scheduler_event_generator_error_t

Error types used by the SEG.

Enumerator:

GLOBUS_SEG_ERROR_TYPE_NULL

NULL Parameter.

GLOBUS_SEG_ERROR_TYPE_ALREADY_SET

Already called a one-time function.

GLOBUS_SEG_ERROR_TYPE_INVALID_MODULE

Shared module missing descriptor.

GLOBUS_SEG_ERROR_TYPE_INVALID_FORMAT

Invalid printf format for SEG protocol message.

GLOBUS_SEG_ERROR_TYPE_OUT_OF_MEMORY

Out of memory.

GLOBUS_SEG_ERROR_TYPE_LOADING_MODULE

Unable to load scheduler module.

Function Documentation

globus_result_t globus_scheduler_event (const char * format, ...)

Send an arbitrary SEG notification. Parameters:

format Printf-style format of the SEG notification message
... Varargs which will be interpreted as per format.

Return values:

GLOBUS_SUCCESS Scheduler message sent or queued.
GLOBUS_SEG_ERROR_NULL Null format.
GLOBUS_SEG_ERROR_INVALID_FORMAT Unable to determine length of formatted string.

globus_result_t globus_scheduler_event_pending (time_t timestamp, const char * jobid)

Send a job pending event to the JobSchedulerMonitor implementation. Parameters:

timestamp Timestamp to use for the event. If set to 0, the time which this function was called is used.
jobid String indicating the scheduler-specific name of the job.

Return values:

GLOBUS_SUCCESS Scheduler message sent or queued.
GLOBUS_SEG_ERROR_NULL Null jobid.
GLOBUS_SEG_ERROR_INVALID_FORMAT Unable to determine length of formatted string.

globus_result_t globus_scheduler_event_active (time_t timestamp, const char * jobid)

Send a job active event to the JobSchedulerMonitor implementation. Parameters:

timestamp Timestamp to use for the event. If set to 0, the time which this function was called is used.
jobid String indicating the scheduler-specific name of the job.

Return values:

GLOBUS_SUCCESS Scheduler message sent or queued.
GLOBUS_SEG_ERROR_NULL Null jobid.
GLOBUS_SEG_ERROR_INVALID_FORMAT Unable to determine length of formatted string.

globus_result_t globus_scheduler_event_failed (time_t timestamp, const char * jobid, int failure_code)

Send a job failed event to the JobSchedulerMonitor implementation. Parameters:

timestamp Timestamp to use for the event. If set to 0, the time which this function was called is used.
jobid String indicating the scheduler-specific name of the job.
failure_code Failure code of the process if known.

Return values:

GLOBUS_SUCCESS Scheduler message sent or queued.
GLOBUS_SEG_ERROR_NULL Null jobid.
GLOBUS_SEG_ERROR_INVALID_FORMAT Unable to determine length of formatted string.

globus_result_t globus_scheduler_event_done (time_t timestamp, const char * jobid, int exit_code)

Send a job done event to the JobSchedulerMonitor implementation. Parameters:

timestamp Timestamp to use for the event. If set to 0, the time which this function was called is used.
jobid String indicating the scheduler-specific name of the job.
exit_code Exit code of the process if known.

Return values:

GLOBUS_SUCCESS Scheduler message sent or queued.
GLOBUS_SEG_ERROR_NULL Null jobid.
GLOBUS_SEG_ERROR_INVALID_FORMAT Unable to determine length of formatted string.

globus_result_t globus_scheduler_event_generator_get_timestamp (time_t * timestamp)

Get the timestamp for the earliest event an SEG module should send. Parameters:

timestamp Pointer to a time_t which will be set to the timestamp passed to the SEG executable. The module should not send any events which occur prior to this timestamp.

Return values:

GLOBUS_SEG_ERROR_NULL Null timestamp.
GLOBUS_SUCCESS Timestamp value updated. If the timestamp was not set on the SEG command-line, then the value pointed to by timestamp will be set to 0.

Author

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