DBD::Gofer::Policy::Base - Online Linux Manual PageSection : 3pm
Updated : 2020-11-08
Source : perl v5.32.0
Note : User Contributed Perl Documentation
NAMEDBD::Gofer::Policy::Base − Base class for DBD::Gofer policies
SYNOPSIS​ $dbh = DBI−>connect("dbi:Gofer:transport=...;policy=...", ...)
DESCRIPTIONDBD::Gofer can be configured via a 'policy' mechanism that allows you to fine-tune the number of round-trips to the Gofer server. The policies are grouped into classes (which may be subclassed) and referenced by the name of the class. The DBD::Gofer::Policy::Base class is the base class for all the policy classes and describes all the individual policy items. The Base policy is not used directly. You should use a policy class derived from it.
POLICY CLASSESThree policy classes are supplied with DBD::Gofer: DBD::Gofer::Policy::pedantic is most 'transparent' but slowest because it makes more round-trips to the Gofer server. DBD::Gofer::Policy::classic is a reasonable compromise − it's the default policy. DBD::Gofer::Policy::rush is fastest, but may require code changes in your applications. Generally the default classic policy is fine. When first testing an existing application with Gofer it is a good idea to start with the pedantic policy first and then switch to classic or a custom policy, for final testing.
POLICY ITEMSThese are temporary docs: See the source code for list of policies and their defaults. In a future version the policies and their defaults will be defined in the pod and parsed out at load-time. See the source code to this module for more details.
POLICY CUSTOMIZATION​XXX This area of DBD::Gofer is subject to change. There are three ways to customize policies: Policy classes are designed to influence the overall behaviour of DBD::Gofer with existing, unaltered programs, so they work in a reasonably optimal way without requiring code changes. You can implement new policy classes as subclasses of existing policies. In many cases individual policy items can be overridden on a case-by-case basis within your application code. You do this by passing a corresponding ​<go_<policy_name>> attribute into DBI methods by your application code. This lets you fine-tune the behaviour for special cases. The policy items are implemented as methods. In many cases the methods are passed parameters relating to the DBD::Gofer code being executed. This means the policy can implement dynamic behaviour that varies depending on the particular circumstances, such as the particular statement being executed.
AUTHORTim Bunce, <http://www.tim.bunce.name>
LICENCE AND COPYRIGHTCopyright (c) 2007, Tim Bunce, Ireland. All rights reserved. This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic. 0
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