Use Python to filter key messages in Oracle alert log in UNIX tail fusion

# Author: Donghua
# Purpose: Filter key messages in Oracle alert log in UNIX tail fusion
import io
import datetime
import time
import traceback

DayList=['Sun','Mon','Tue','Wed','Thu','Fri','Sat']
KeyWordList=['ORA-','Error','Starting ORACLE instance','Shutting down instance']
SkipOldEventMinutes=5AlertLogFile=r'D:\oracle\diag\rdbms\orcl\orcl\trace\alert_orcl.log'
SkipOldEventDateTimeDelta=datetime.timedelta(minutes=SkipOldEventMinutes)
EventDate=datetime.datetime(1, 1, 1, 0, 0)

try:
    with io.open(AlertLogFile,mode='r') as f:
        while True:
            line=f.readline()
            # print ('[Debug] %s' % line.rstrip('\n'))            if len(line) > 3 and line[0:3] in DayList:
                EventDate=datetime.datetime.strptime(line.rstrip('\n'), '%a %b %d %H:%M:%S %Y')
                if EventDate < datetime.datetime.now()-SkipOldEventDateTimeDelta :
                    continue            elif len(line) > 3:
                if EventDate < datetime.datetime.now()-SkipOldEventDateTimeDelta :
                    continue                for w in KeyWordList:
                    if w in line:
                        print('[%s] %s' % (EventDate, line.rstrip('\n')))
            elif len(line) == 0:
                time.sleep(0.5)
            else:
                continueexcept:
    print(traceback.format_exc())

 

 

Use Python to format Oracle alert log based on keywords and time range

# Author: Donghua# Purpose: Filter key messages in Oracle alert log for last 48 hoursimport io
import datetime
import traceback

DayList=['Sun','Mon','Tue','Wed','Thu','Fri','Sat']
KeyWordList=['ORA-','Error','Starting ORACLE instance','Shutting down instance']
OutputList=[]
SkipOldEventHours=48AlertLogFile=r'D:\oracle\diag\rdbms\orcl\orcl\trace\alert_orcl.log'
SkipOldEventDateTimeDelta=datetime.timedelta(hours=SkipOldEventHours)
EventDate=datetime.datetime(1, 1, 1, 0, 0)

try:
    with io.open(AlertLogFile,mode='r') as f:
        for line in f:
           if len(line)>3 and line[0:3] in DayList:
                # OutputList.append(line)                EventDate=datetime.datetime.strptime(line.rstrip('\n'), '%a %b %d %H:%M:%S %Y')
                if EventDate < datetime.datetime.now()-SkipOldEventDateTimeDelta :
                    continue           elif len(line)>3:
                if EventDate < datetime.datetime.now()-SkipOldEventDateTimeDelta :
                    continue                for w in KeyWordList:
                    if w in line:
                        OutputList.append([EventDate,line.rstrip('\n')])
           else:
                continueexcept:
    print(traceback.format_exc())

for o in OutputList:
    # use o[0].strftime('%a %b %d %H:%M:%S %Y') to get original Oracle style Format    print('[%s] %s' % (o[0], o[1]))

Python’s winreg: Editing the Windows Registry

# Author: Donghua# Purpose: Demonstration
import sys
import winreg
import traceback


RegPath='SOFTWARE\Python\DemoKey'NewKey='Key1'NewValueName='Val1'NewStringValue='DemoValue'
def QueryKeyValue():

    # Query the default value for KEY1    try:
        with winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, RegPath) as key:
            ExistValue=winreg.QueryValue(key,NewKey)
            print('New Key (Default) value:',ExistValue)
    except FileNotFoundError:
         print(traceback.format_exc())

      # Set the string value (Val1) under KEY1    try:
        with winreg.OpenKeyEx(winreg.HKEY_LOCAL_MACHINE, RegPath,0,access=winreg.KEY_READ) as key:
            ExistValue=winreg.QueryValueEx(key,NewValueName)
            print('New String value:',ExistValue[0])
    except FileNotFoundError:
         print(traceback.format_exc())

    return
def SetKeyValue():
    # set the default value for KEY1    try:
        with winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, RegPath) as key:
            winreg.SetValue(key,NewKey,winreg.REG_SZ,'Default Key Value Demo')
    except FileNotFoundError:
        try:
            key=winreg.CreateKey(winreg.HKEY_LOCAL_MACHINE, RegPath)
            winreg.SetValue(key,NewKey,winreg.REG_SZ,'Default Value Demo')
        except:
            print(traceback.format_exc())
    except:
        print(traceback.format_exc())

    # Set the string key/value pair under KEY1    try:
        with winreg.OpenKeyEx(winreg.HKEY_LOCAL_MACHINE, RegPath,reserved=0,access=winreg.KEY_WRITE) as key:
            winreg.SetValueEx(key,NewValueName,0,winreg.REG_SZ, NewStringValue)
    except:
        try:
            key=winreg.CreateKeyEx(winreg.HKEY_LOCAL_MACHINE, RegPath,reserved=0,access=winreg.KEY_WRITE)
            winreg.SetValueEx(key,NewValueName,0,winreg.REG_SZ, NewStringValue)
        except:
            print(traceback.format_exc())
    return
def DelKeyValue():
    try:
        with winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, RegPath, reserved=0,access=winreg.KEY_WRITE) as key:
            # Delete Value Val1 under Key1            try:
                winreg.DeleteValue(key,NewValueName)
                print('Value deleted:', NewValueName)
            except:
                print(traceback.format_exc())
            # Delete Key Key1            try:
                winreg.DeleteKey(key,NewKey)
                print('Key deleted:', NewKey)
            except:
                print(traceback.format_exc())
    except FileNotFoundError:
        print(traceback.format_exc())
    return
if __name__ == "__main__":
    SetKeyValue()
    QueryKeyValue()
    DelKeyValue()