How do I extract the date from the file name itself

[tkmads1]

I need to extract date from the log file name as my logs only have a timestamp and no date available.

The date format is:
xxx_06-20-15-xxx.trc

I have also tried to edit the following stanza in datetime.xml:

<define name="_masheddate" extract="year, month, day">
<text>
<[CDATA[ (?:^|source::).*?(?<!\d|\d\.|-)(?:20)?([901]\d)(0\d|1[012])([012]\d|3[01])(?!\d|-| {2,})
  ]]>
</text>
</define>

But I'm unable to get the required result.

How can I do it?

[woodcock]

You must do this with datetime.xml; but you must NEVER edit the existing global file! You need to create your own, put an entry in your own app's props.conf (again, not the global one) file, like this:

DATETIME_CONFIG = /etc/apps/MyApp/default/datetime.xml

It should have something like this:

 <datetime>
 <define name="myappdatetimefromfile" extract="year, month, day">
    <text><![CDATA[source::.*?-(\d{2})(0\d|1[012])([012]\d|3[01])-\d{2}_\d{2}]]></text>
 </define>
 <timePatterns>
    <use name="myappdatetimefromfile"/>
 </timePatterns>
 <datePatterns>
    <use name="myappdatetimefromfile"/>
 </datePatterns>
 </datetime>