discard_stale_not_published_pub.py

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#!/usr/bin/env python
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# \author Guglielmo Gemignani

# \brief Publishes messages for aggregator testing of discard stale flag

from time import sleep

from diagnostic_msgs.msg import DiagnosticArray, DiagnosticStatus
import rospy


if __name__ == '__main__':
    rospy.init_node('diag_pub')
    pub = rospy.Publisher('/diagnostics', DiagnosticArray, queue_size=10)

    start_time = rospy.get_time()

    while not rospy.is_shutdown():
        array = DiagnosticArray()
        array.header.stamp = rospy.get_rostime()

        # after 2 seconds we will publish only an empty diagnostics
        if rospy.get_time() - start_time < 3:
            array.status = [DiagnosticStatus(1, 'nonexistent2', 'WARN', '', [])]

        pub.publish(array)
        sleep(1.0)