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DBD::Gofer::Policy::Base - Base class for DBD::Gofer policies
$dbh = DBI->connect("dbi:Gofer:transport=...;policy=...", ...)
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.
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.
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.
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 let's 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.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.
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