01-27-2009
Search the last instance of a string in a file
I have a big database log file which keepsgrowing daily. OS is HP UX. Here is a small part of it:
Tue Jan 27 04:03:22 2009
[2009/01/27@04:03:22.906-0500] : add session begin for mfgeb on /dev/pts/th.
[2009/01/27@04:03:22.909-0500] : Converting relative path to absolute path.
[2009/01/27@04:03:22.967-0500] : add session end.
Tue Jan 27 04:03:29 2009
[2009/01/27@04:03:29.345-0500] : list session begin for mfgeb on /dev/pts/th.
[2009/01/27@04:03:29.356-0500] : list session end.
Tue Jan 27 04:03:46 2009
[2009/01/27@04:03:46.262-0500] : add session begin for mfgeb on /dev/pts/tb.
[2009/01/27@04:03:46.331-0500] : add session end.
Tue Jan 27 04:03:49 2009
[2009/01/27@04:03:49.964-0500] : list session begin for mfgeb on /dev/pts/tb.
[2009/01/27@04:03:49.972-0500] : list session end.
Tue Jan 27 04:04:32 2009
[2009/01/27@04:04:32.147-0500] : add session begin for mfgeb on /dev/pts/tg.
[2009/01/27@04:04:32.182-0500] : add session end.
I need to search last instance of string "add session begin" in the file and then print date from that line. In the case here, it's 27th Jan 2009.
Someone please help.
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LEARN ABOUT DEBIAN
plack::session
Plack::Session(3pm) User Contributed Perl Documentation Plack::Session(3pm)
NAME
Plack::Session - Middleware for session management
SYNOPSIS
# Use with Middleware::Session
enable "Session";
# later in your app
use Plack::Session;
my $app = sub {
my $env = shift;
my $session = Plack::Session->new($env);
$session->id;
$session->get($key);
$session->set($key, $value);
$session->remove($key);
$session->keys;
$session->expire;
};
DESCRIPTION
This is the core session object, you probably want to look at Plack::Middleware::Session, unless you are writing your own session
middleware component.
METHODS
new ( $env )
The constructor takes a PSGI request env hash reference.
id This is the accessor for the session id.
Session Data Management
These methods allows you to read and write the session data like Perl's normal hash.
get ( $key )
set ( $key, $value )
remove ( $key )
keys
session, dump
Session Lifecycle Management
expire
This method can be called to expire the current session id.
BUGS
All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to
cpan-RT.
AUTHOR
Stevan Little <stevan.little@iinteractive.com>
COPYRIGHT AND LICENSE
Copyright 2009, 2010 Infinity Interactive, Inc.
<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.12.4 2011-03-29 Plack::Session(3pm)