..::lib::Smokeping::matchers::base(SmokeP..::lib::Smokeping::matchers::base(3)NAME
Smokeping::matchers::base - Base Class for implementing SmokePing
Matchers
OVERVIEW
This is the base class for writing SmokePing matchers. Every matcher
must inherit from the base class and provide it's own methods for the
'business' logic.
Note that the actual matchers must have at least one capital letter in
their name, to differentiate them from the base class(es).
DESCRIPTION
Every matcher must provide the following methods:
new
The new method expects hash elements as an argument eg
new({x=>'\d+',y=>'\d+'},x=>1,y=>2). The first part is a syntax rule for
the arguments it should expect and the second part are the arguments
itself. The first part will be supplied by the child class as it calls
the parent method.
Length
The Length method returns the number of values the matcher will expect
from SmokePing. This method must be overridden by the children of the
base class.
Desc
Simply return the description of the function. This method must be
overwritten by a children of the base class.
Test
Run the matcher and return true or false. The Test method is called
with a hash containing two arrays giving it access to both rtt and loss
values.
my $data=shift;
my @rtt = @{$data->{rtt}};
my @loss = @{$data->{loss}};
The arrays are ordered from old to new.
@rdd[old..new]
There may be more than the expected number of elements in this array.
Address them with $x[-1] to $x[-max].
There's also a key called 'prevmatch' in the hash. It contains the
value returned by the previous call of the 'Test' method. This allows
for somewhat more intelligent alerting due to state awareness.
my $prevmatch = $data->{prevmatch};
COPYRIGHT
Copyright (c) 2004 by OETIKER+PARTNER AG. All rights reserved.
LICENSE
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
675 Mass Ave, Cambridge, MA 02139, USA.
AUTHOR
Tobias Oetiker <tobi@oetiker.ch>
2.6.112011-10..::lib::Smokeping::matchers::base(3)
