source: tmcsimulator/trunk/src/python/unifiedlogger/cad_watcher.py @ 466

import json, time, ConfigParser

from copy import deepcopy



# CAD comment log Watcher

# Look for changes in the CAD comment log.

# The CADserver will append new comments to the log as they arrive 

# from clients.  We only need to keep track of the log length in order to

# determine if a new comment has been added.  We will output the 

# new messages that arrived during the last wait interval. 

# jdalbey  7/6/2019



lastLineNum = 0



# Utility functions

def isEmpty(cmsitem):

    return cmsitem == ",,,,,"

def isFull(cmsitem):

    return not isEmpty(cmsitem)



# Read the cad comments log 

def readFile():

    # get path to input file from configuration

    config = ConfigParser.ConfigParser()

    config.read('config/logging_service.cfg')

    logfilepath  = config.get('Paths', 'UnifiedLogPath')

    

    lines = []

    try:

        text_file = open(logfilepath + "CADcomments.log", "r")

    except IOError:

        print "Error: missing "+logfilepath+"CADcomments.log file."

    else:

        lines = text_file.read().split('\n')

        text_file.close()    

    return lines

    

def setup():

    lastLineNum = 0

    return



# Retrieve new messages from CAD comment log 

def getLogEntries():

    global lastLineNum

    msgList = readFile()

    currList = []

    currList = msgList[lastLineNum:]    # new items since last file read

    lastLineNum = len(msgList)-1

    return currList



# Local main for unit testing

def main():

    setup()

    # Loop Forever, checking every five seconds

    while True:

        # Look for new messages

        answer = getLogEntries()

        # Output results

        for item in answer:

            print item

        # wait 

        time.sleep(5)



if __name__ == "__main__":

    main()