lire::dlfstream(3pm) [debian man page]

DlfStream(3pm)						  LogReport's Lire Documentation					    DlfStream(3pm)

NAME

       Lire::DlfStream - Interface to DLF data stream

SYNOPSIS

	 use Lire::DlfStore;

	 my $store = Lire::DlfStore->open( "mystore" );
	 my $dlf_stream = $store->open_dlf_stream( "www", "r" );

	 print "Data begins on ", scalar localtime $dlf_stream->start_time(), "
";
	 print "Data ends on   ", scalar localtime $dlf_stream->end_time(), "
";
	 while ( my $dlf = $dlf_stream->read_dlf() ) {
	   ...
	 }

DESCRIPTION

       This object encapsulates DLF stream.

   name
       Returns the schema's name of the DlfStream.

   mode()
       Returns the mode in which the DlfStream was opened.

   sort_spec()
       Returns the sort specification that is set on the stream.

   close()
       This method should be called when the Lire::DlfStream isn't needed anymore, otherwise the same DlfStream cannot be opened until then.

   nrecords()
       Returs the number of DLF records in the stream.

   start_time()
       Returns the timestamp of the oldest DLF record in the stream in seconds since the epoch.

   end_time()
       Returns the timestamp of the newest DLF record in the stream in seconds since the epoch.

   read_dlf()
       Returns an hash reference containing the next DLF record in the stream. It returns undef once the end of the stream is reached.

       This method will throw an exception if the DlfStream isn't open in 'r' mode or if there is an error reading the DLF record.

   read_dlf_aref()
       Returns the next DLF record in the stream as an array reference. The fields are in the order specified by the schema.

       This method will throw an exception if the DlfStream isn't open in 'r' mode or if there is an error reading the DLF record.

   write_dlf( $dlf, [ $link_ids ] )
       Writes the fields contained in the hash ref $dlf to the DLF stream.

       This method will throw an exception if there is an error writing the DLF record or if the stream isn't opened in 'w' mode.

       The $link_ids parameter is used when the stream's schema is a Lire::DerivedSchema. It should be an array reference containing the DLF ids
       of the records which are linked to this record.

   clean( [ $time ] )
       This method will remove all DLF records older than $time. It $time is omitted, all Dlf records will be removed.

Lire 2.1.1							    2006-07-23							    DlfStream(3pm)

Timegroup(3pm)						  LogReport's Lire Documentation					    Timegroup(3pm)

NAME

       Lire::Timegroup - Base class for implementation of the timegroup aggregator

SYNOPSIS

	   use Lire::Timegroup;

DESCRIPTION

       This module is the base class for implementation of the timegroup aggregator. This aggregator will split the DLF records based on a time
       period controlled throught the period attribute. For example, using 1d as the period value, this aggregator will group all records in the
       same day period together.

CONSTRUCTOR

   new( %params )
       Creates a new instance of a timegroup aggregator. In addition to the normal report operator parameters, the timegroup aggregator can take
       several parameters:

       field
	   This optional parameter contains the DLF field which contains the time value used to group the DLF records together. See the field()
	   method for more information.

       period
	   This mandatory parameter should contains the period's length that will be used to group the records. See the period() method for more
	   information.

METHODS

   field( [$new_field] )
       Returns the DLF field's name that is used to group the DLF records.  This should be a valid timestamp DLF field in the current schema. By
       default, the default timestamp field of the DLF schema is used.

       You can change the field by passing a $new_field parameter.

   period( [$new_period])
       Returns the period's length in which the records are grouped. This can either be a duration value or the name of a report specification's
       parameter containing a duration value.

       The period's length can be changed by using the $new_period parameter.

SEE ALSO

	Lire::ReportSpec(3pm), Lire::Group(3pm), Lire::ReportOperator(3pm),
	Lire::Timeslot(3pm)

AUTHORS

	 Francis J. Lacoste <flacoste@logreport.org>
	 Wolfgang Sourdeau <Wolfgang.Sourdeau@Contre.COM>

VERSION

       $Id: Timegroup.pm,v 1.33 2006/07/23 13:16:30 vanbaal Exp $

COPYRIGHT

       Copyright (C) 2001-2004 Stichting LogReport Foundation LogReport@LogReport.org

       This file is part of Lire.

       Lire 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 (see COPYING); if not, check with
       http://www.gnu.org/copyleft/gpl.html.

Lire 2.1.1							    2006-07-23							    Timegroup(3pm)