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Edit File : Request.pm \| Size : 5.11 KB
package DBI::Gofer::Request; # $Id: Request.pm 12536 2009-02-24 22:37:09Z Tim $ # # Copyright (c) 2007, Tim Bunce, Ireland # # You may distribute under the terms of either the GNU General Public # License or the Artistic License, as specified in the Perl README file. use strict; use DBI qw(neat neat_list); use base qw(DBI::Util::_accessor); our $VERSION = "0.012537"; use constant GOf_REQUEST_IDEMPOTENT => 0x0001; use constant GOf_REQUEST_READONLY => 0x0002; our @EXPORT = qw(GOf_REQUEST_IDEMPOTENT GOf_REQUEST_READONLY); __PACKAGE__->mk_accessors(qw( version flags dbh_connect_call dbh_method_call dbh_attributes dbh_last_insert_id_args sth_method_calls sth_result_attr )); __PACKAGE__->mk_accessors_using(make_accessor_autoviv_hashref => qw( meta )); sub new { my ($self, $args) = @_; $args->{version} \|\|= $VERSION; return $self->SUPER::new($args); } sub reset { my ($self, $flags) = @_; # remove everything except connect and version %$self = ( version => $self->{version}, dbh_connect_call => $self->{dbh_connect_call}, ); $self->{flags} = $flags if $flags; } sub init_request { my ($self, $method_and_args, $dbh) = @_; $self->reset( $dbh->{ReadOnly} ? GOf_REQUEST_READONLY : 0 ); $self->dbh_method_call($method_and_args); } sub is_sth_request { return shift->{sth_result_attr}; } sub statements { my $self = shift; my @statements; if (my $dbh_method_call = $self->dbh_method_call) { my $statement_method_regex = qr/^(?:do\|prepare)$/; my (undef, $method, $arg1) = @$dbh_method_call; push @statements, $arg1 if $method && $method =~ $statement_method_regex; } return @statements; } sub is_idempotent { my $self = shift; if (my $flags = $self->flags) { return 1 if $flags & (GOf_REQUEST_IDEMPOTENT\|GOf_REQUEST_READONLY); } # else check if all statements are SELECT statement that don't include FOR UPDATE my @statements = $self->statements; # XXX this is very minimal for now, doesn't even allow comments before the select # (and can't ever work for "exec stored_procedure_name" kinds of statements) # XXX it also doesn't deal with multiple statements: prepare("select foo; update bar") return 1 if @statements == grep { m/^ \s* SELECT \b /xmsi && !m/ \b FOR \s+ UPDATE \b /xmsi } @statements; return 0; } sub summary_as_text { my $self = shift; my ($context) = @_; my @s = ''; if ($context && %$context) { my @keys = sort keys %$context; push @s, join(", ", map { "$_=>".$context->{$_} } @keys); } my ($method, $dsn, $user, $pass, $attr) = @{ $self->dbh_connect_call }; $method \|\|= 'connect_cached'; $pass = '*' if defined $pass; my $tmp = ''; if ($attr) { $tmp = { %{$attr\|\|{}} }; # copy so we can edit $tmp->{Password} = '*' if exists $tmp->{Password}; $tmp = "{ ".neat_list([ %$tmp ])." }"; } push @s, sprintf "dbh= $method(%s, %s)", neat_list([$dsn, $user, $pass]), $tmp; if (my $flags = $self->flags) { push @s, sprintf "flags: 0x%x", $flags; } if (my $dbh_attr = $self->dbh_attributes) { push @s, sprintf "dbh->FETCH: %s", @$dbh_attr if @$dbh_attr; } my ($wantarray, $meth, @args) = @{ $self->dbh_method_call }; my $args = neat_list(\@args); $args =~ s/\n+/ /g; push @s, sprintf "dbh->%s(%s)", $meth, $args; if (my $lii_args = $self->dbh_last_insert_id_args) { push @s, sprintf "dbh->last_insert_id(%s)", neat_list($lii_args); } for my $call (@{ $self->sth_method_calls \|\| [] }) { my ($meth, @args) = @$call; ($args = neat_list(\@args)) =~ s/\n+/ /g; push @s, sprintf "sth->%s(%s)", $meth, $args; } if (my $sth_attr = $self->sth_result_attr) { push @s, sprintf "sth->FETCH: %s", %$sth_attr if %$sth_attr; } return join("\n\t", @s) . "\n"; } sub outline_as_text { # one-line version of summary_as_text my $self = shift; my @s = ''; my $neatlen = 80; if (my $flags = $self->flags) { push @s, sprintf "flags=0x%x", $flags; } my (undef, $meth, @args) = @{ $self->dbh_method_call }; push @s, sprintf "%s(%s)", $meth, neat_list(\@args, $neatlen); for my $call (@{ $self->sth_method_calls \|\| [] }) { my ($meth, @args) = @$call; push @s, sprintf "%s(%s)", $meth, neat_list(\@args, $neatlen); } my ($method, $dsn) = @{ $self->dbh_connect_call }; push @s, "$method($dsn,...)"; # dsn last as it's usually less interesting (my $outline = join("; ", @s)) =~ s/\s+/ /g; # squish whitespace, incl newlines return $outline; } 1; =head1 NAME DBI::Gofer::Request - Encapsulate a request from DBD::Gofer to DBI::Gofer::Execute =head1 DESCRIPTION This is an internal class. =head1 AUTHOR Tim Bunce, L<http://www.tim.bunce.name> =head1 LICENCE AND COPYRIGHT Copyright (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 L<perlartistic>. =cut Back

Edit File : Request.pm | Size : 5.11 KB

package DBI::Gofer::Request;

#   $Id: Request.pm 12536 2009-02-24 22:37:09Z Tim $
#
#   Copyright (c) 2007, Tim Bunce, Ireland
#
#   You may distribute under the terms of either the GNU General Public
#   License or the Artistic License, as specified in the Perl README file.

use strict;

use DBI qw(neat neat_list);

use base qw(DBI::Util::_accessor);

our $VERSION = "0.012537";

use constant GOf_REQUEST_IDEMPOTENT => 0x0001;
use constant GOf_REQUEST_READONLY   => 0x0002;

our @EXPORT = qw(GOf_REQUEST_IDEMPOTENT GOf_REQUEST_READONLY);

__PACKAGE__->mk_accessors(qw(
    version
    flags
    dbh_connect_call
    dbh_method_call
    dbh_attributes
    dbh_last_insert_id_args
    sth_method_calls
    sth_result_attr
));
__PACKAGE__->mk_accessors_using(make_accessor_autoviv_hashref => qw(
    meta
));

sub new {
    my ($self, $args) = @_;
    $args->{version} ||= $VERSION;
    return $self->SUPER::new($args);
}

sub reset {
    my ($self, $flags) = @_;
    # remove everything except connect and version
    %$self = (
        version => $self->{version},
        dbh_connect_call => $self->{dbh_connect_call},
    );
    $self->{flags} = $flags if $flags;
}

sub init_request {
    my ($self, $method_and_args, $dbh) = @_;
    $self->reset( $dbh->{ReadOnly} ? GOf_REQUEST_READONLY : 0 );
    $self->dbh_method_call($method_and_args);
}

sub is_sth_request {
    return shift->{sth_result_attr};
}

sub statements {
    my $self = shift;
    my @statements;
    if (my $dbh_method_call = $self->dbh_method_call) {
        my $statement_method_regex = qr/^(?:do|prepare)$/;
        my (undef, $method, $arg1) = @$dbh_method_call;
        push @statements, $arg1 if $method && $method =~ $statement_method_regex;
    }
    return @statements;
}

sub is_idempotent {
    my $self = shift;

if (my $flags = $self->flags) {
        return 1 if $flags & (GOf_REQUEST_IDEMPOTENT|GOf_REQUEST_READONLY);
    }

# else check if all statements are SELECT statement that don't include FOR UPDATE
    my @statements = $self->statements;
    # XXX this is very minimal for now, doesn't even allow comments before the select
    # (and can't ever work for "exec stored_procedure_name" kinds of statements)
    # XXX it also doesn't deal with multiple statements: prepare("select foo; update bar")
    return 1 if @statements == grep {
                m/^ \s* SELECT \b /xmsi && !m/ \b FOR \s+ UPDATE \b /xmsi
             } @statements;

return 0;
}

sub summary_as_text {
    my $self = shift;
    my ($context) = @_;
    my @s = '';

if ($context && %$context) {
        my @keys = sort keys %$context;
        push @s, join(", ", map { "$_=>".$context->{$_} } @keys);
    }

my ($method, $dsn, $user, $pass, $attr) = @{ $self->dbh_connect_call };
    $method ||= 'connect_cached';
    $pass = '***' if defined $pass;
    my $tmp = '';
    if ($attr) {
        $tmp = { %{$attr||{}} }; # copy so we can edit
        $tmp->{Password} = '***' if exists $tmp->{Password};
        $tmp = "{ ".neat_list([ %$tmp ])." }";
    }
    push @s, sprintf "dbh= $method(%s, %s)", neat_list([$dsn, $user, $pass]), $tmp;

if (my $flags = $self->flags) {
        push @s, sprintf "flags: 0x%x", $flags;
    }

if (my $dbh_attr = $self->dbh_attributes) {
        push @s, sprintf "dbh->FETCH: %s", @$dbh_attr
            if @$dbh_attr;
    }

my ($wantarray, $meth, @args) = @{ $self->dbh_method_call };
    my $args = neat_list(\@args);
    $args =~ s/\n+/ /g;
    push @s, sprintf "dbh->%s(%s)", $meth, $args;

if (my $lii_args = $self->dbh_last_insert_id_args) {
        push @s, sprintf "dbh->last_insert_id(%s)", neat_list($lii_args);
    }

for my $call (@{ $self->sth_method_calls || [] }) {
        my ($meth, @args) = @$call;
        ($args = neat_list(\@args)) =~ s/\n+/ /g;
        push @s, sprintf "sth->%s(%s)", $meth, $args;
    }

if (my $sth_attr = $self->sth_result_attr) {
        push @s, sprintf "sth->FETCH: %s", %$sth_attr
            if %$sth_attr;
    }

return join("\n\t", @s) . "\n";
}

sub outline_as_text { # one-line version of summary_as_text
    my $self = shift;
    my @s = '';
    my $neatlen = 80;

if (my $flags = $self->flags) {
        push @s, sprintf "flags=0x%x", $flags;
    }

my (undef, $meth, @args) = @{ $self->dbh_method_call };
    push @s, sprintf "%s(%s)", $meth, neat_list(\@args, $neatlen);

for my $call (@{ $self->sth_method_calls || [] }) {
        my ($meth, @args) = @$call;
        push @s, sprintf "%s(%s)", $meth, neat_list(\@args, $neatlen);
    }

my ($method, $dsn) = @{ $self->dbh_connect_call };
    push @s, "$method($dsn,...)"; # dsn last as it's usually less interesting

(my $outline = join("; ", @s)) =~ s/\s+/ /g; # squish whitespace, incl newlines
    return $outline;
}

=head1 NAME

DBI::Gofer::Request - Encapsulate a request from DBD::Gofer to DBI::Gofer::Execute

=head1 DESCRIPTION

This is an internal class.

=head1 AUTHOR

Tim Bunce, L<http://www.tim.bunce.name>

=head1 LICENCE AND COPYRIGHT

This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself. See L<perlartistic>.

=cut

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