NAME

       NetSDS::Class::Abstract - superclass for all NetSDS APIs

SYNOPSIS

               package MyClass;
               use base 'NetSDS::Class::Abstract';

               __PACKAGE__->mk_accessors(qw/my_field/);

               sub error_sub {
                       my ($self) = @_;
                       if (!$self->my_field) {
                               return $self->error("No my_field defined");
                       }
               }

               1;

DESCRIPTION

       "NetSDS::Class::Abstract" is a superclass for all other NetSDS classes, containing the
       following functionality:

       •   common class constructor

       •   safe modules inclusion

       •   class and objects accessors

       •   logging

       •   error handling;

       All other class/object APIs should inherit this class to use it's functionality in
       standard way.

CONSTRUCTOR, INITIALIZATION, APPLICATION

       new(%params) - common constructor
           "new()" method implements common constructor for NetSDS classes.  Constructor may be
           overwriten in inherited classes and usually this happens to implement module specific
           functionality.

           Constructor requres parameters as hash that are set as object properties.

                   my $object = NetSDS::SomeClass->new(
                           foo => 'abc',
                           bar => 'def',
                   );

       mk_class_accessors(@properties) - class properties accessor
           See Class::Accessor for details.

                   __PACKAGE__->mk_class_accessors('foo', 'bar');

       mk_accessors(@propertire) - object properties accessors
           See Class::Accessor::Class for details.

                   $self->mk_accessors('foo', 'bar');

           Other "Class::Accessor::Class" methods available as well.

       use_modules(@modules_list) - load modules on demand
           "use_modules()" provides safe on demand modules loader.  It requires list of modules
           names as parameters

           Return 1 in case of success or "undef" if faied. Error messages in case of failure are
           available using "errstr()" call.

           Example:

                   # Load modules for daemonization
                   if ($daemon_mode) {
                           $self->use_modules("Proc::Daemon", "Proc::PID::File");
                   }

       unbless() - return unblessed object
           Return unblessed data structure of object that may be used when some code requires non
           blessed structures (like JSON serialization).

           Example:

                   my $var = $obj->unbless();

LOGGING

       logger() - get/set logging handler
           "logger" property is an object that should provide functionality handling log
           messaging. Usually it's object of NetSDS::Logger class or "undef". However it may
           another object implementing non-standard features like sending log to e-mail or to
           DBMS.

           Example:

                   # Set logger and send log message
                   $obj->logger(NetSDS::Logger->new());
                   $obj->log("info", "Logger connected");

       log($level, $message) - write log message
           Paramters: log level, log message

                   $obj->log("info", "We still alive");

ERROR HANDLING

       error($msg, [$code]) - set error message and code
           "error()" method set error message and optional error code.  It can be invoked in both
           class and object contexts.

           Example 1: set class error

                   NetSDS::Foo->error("Mistake found");

           Example 2: set object error with code

                   $obj->error("Can't launch rocket", BUG_STUPID);

       errstr() - retrieve error message
           "errstr()" method returns error string in both object and class contexts.

           Example:

                   warn "We have an error: " . $obj->errstr;

       errcode() - retrieve error code
           "errcode()" method returns error code in both object and class contexts.

           Example:

                   if ($obj->errcode == 42) {
                           print "Epic fail! We've found an answer!";
                   }

EXAMPLES

       See "samples" directory and other "NetSDS" moduleis for examples of code.

SEE ALSO

       Class::Accessor::Class

AUTHOR

       Michael Bochkaryov <misha@rattler.kiev.ua>

LICENSE

       Copyright (C) 2008-2009 Net Style Ltd.

       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., 59 Temple Place, Suite 330, Boston,
       MA  02111-1307  USA