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RESTful API Reference
CloudEngine 12800 and 12800E V200R003C00

This document describes the OPS APIs supported by the device, including OPS-supported operations, request examples, elements in the requests, response examples, elements in the responses, and response status codes.

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Subscribe to Timer Events

Subscribe to Timer Events

  • Function Description

    The OPS ERE provides timer event subscription.

    After you subscribe to timer events and a timer event is triggered, the system executes the ops_execute() function in the Python script.

    This API can only be used in the ops_condition() function of the maintenance assistant script.

  • Command Prototype

    # Timer event defined in the Linux cron timer description format

    opsObj.timer.cron(tag, crontime)

    # Cyclic timer, triggered at a specified interval

    opsObj.timer.relative(tag, timelength)

    # Timer triggered after a specified number of seconds elapses since zero hour of the year of 1970

    opsObj.timer.absolute(tag, timelength)

    # Timer triggered after a specified number of seconds elapses since a timer event is subscribed

    opsObj.timer.countdown(tag, timelength)

  • Parameter Description
    Table 3-909  Parameters supported by timer event subscription APIs




    Specifies an OPS object. It is obtained using ops.ops() in instance mode.


    Specifies a condition ID. The value is a string of 1 to 8 case-sensitive characters that starts with a letter and contains letters, digits, or underscores (_). Enter quotation marks ("") or None for the only one condition. tag cannot be set to andor, or not.


    Specifies a cron timer description. The value is a character string. For example, if the value is * * * *, the timer is triggered every second.


    Specifies a timer value, in seconds.

  • Description of Return Values

    First return value: The value 0 indicates a success; the value 1 indicates a failure.

    Second return value: This value describes success or failure reasons, expressed in character strings.

  • Example
    def ops_condition(_ops):
         _ops.timer.countdown("con11", 5)
    def ops_execute(_ops): 
        _ops.syslog("Record an informational syslog.")
        return 0

    A timer event is triggered 5s after the timer event is subscribed.

Updated: 2019-05-05

Document ID: EDOC1100004147

Views: 60808

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