/[Redis.pre-github]/lib/Redis.pm
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Contents of /lib/Redis.pm

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Revision 9 - (show annotations)
Sat Mar 21 22:54:10 2009 UTC (10 years, 7 months ago) by dpavlin
File size: 3375 byte(s)
exists
1 package Redis;
2
3 use warnings;
4 use strict;
5
6 use IO::Socket::INET;
7 use Data::Dump qw/dump/;
8 use Carp qw/confess/;
9
10 =head1 NAME
11
12 Redis - The great new Redis!
13
14 =cut
15
16 our $VERSION = '0.01';
17
18
19 =head1 SYNOPSIS
20
21 Pure perl bindings for L<http://code.google.com/p/redis/>
22
23 use Redis;
24
25 my $r = Redis->new();
26
27
28
29
30 =head1 FUNCTIONS
31
32 =head2 new
33
34 =cut
35
36 our $sock;
37 my $server = '127.0.0.1:6379';
38
39 sub new {
40 my $class = shift;
41 my $self = {};
42 bless($self, $class);
43
44 warn "# opening socket to $server";
45
46 $sock ||= IO::Socket::INET->new(
47 PeerAddr => $server,
48 Proto => 'tcp',
49 ) || die $!;
50
51 $self;
52 }
53
54 =head1 Connection Handling
55
56 =head2 quit
57
58 $r->quit;
59
60 =cut
61
62 sub quit {
63 my $self = shift;
64
65 close( $sock ) || warn $!;
66 }
67
68 =head2 ping
69
70 $r->ping || die "no server?";
71
72 =cut
73
74 sub ping {
75 print $sock "PING\r\n";
76 my $pong = <$sock>;
77 die "ping failed, got ", dump($pong) unless $pong eq "+PONG\r\n";
78 }
79
80 =head1 Commands operating on string values
81
82 =head2 set
83
84 $r->set( foo => 'bar', $new );
85
86 =cut
87
88 sub set {
89 my ( $self, $k, $v, $new ) = @_;
90 print $sock ( $new ? "SETNX" : "SET" ) . " $k " . length($v) . "\r\n$v\r\n";
91 my $ok = <$sock>;
92 confess dump($ok) unless $ok eq "+OK\r\n";
93 }
94
95 =head2 get
96
97 my $value = $r->get( 'foo' );
98
99 =cut
100
101 sub get {
102 my ( $self, $k ) = @_;
103 print $sock "GET $k\r\n";
104 my $len = <$sock>;
105 # warn "# len: ",dump($len);
106 return undef if $len eq "nil\r\n";
107 my $v;
108 read($sock, $v, $len) || die $!;
109 # warn "# v: ",dump($v);
110 my $crlf;
111 read($sock, $crlf, 2); # skip cr/lf
112 return $v;
113 }
114
115 =head2 incr
116
117 $r->incr('counter');
118 $r->incr('tripplets', 3);
119
120 =cut
121
122 sub incr {
123 my ( $self, $key, $value ) = @_;
124 if ( defined $value ) {
125 print $sock "INCRBY $key $value\r\n";
126 } else {
127 print $sock "INCR $key\r\n";
128 }
129 my $count = <$sock>;
130 warn "# $key = $count";
131 return $count;
132 }
133
134 =head2 decr
135
136 $r->decr('counter');
137 $r->decr('tripplets', 3);
138
139 =cut
140
141 sub decr {
142 my ( $self, $key, $value ) = @_;
143 if ( defined $value ) {
144 print $sock "DECRBY $key $value\r\n";
145 } else {
146 print $sock "DECR $key\r\n";
147 }
148 my $count = <$sock>;
149 warn "# $key = $count";
150 return $count;
151 }
152
153 =head2 exists
154
155 $r->exists( 'key' ) && print "got key!";
156
157 =cut
158
159 sub exists {
160 my ( $self, $key ) = @_;
161 print $sock "EXISTS $key\r\n";
162 my $found = <$sock>;
163 $found =~ s{\r\n$}{};
164 warn "# exists $key = $found";
165 return $found;
166 }
167
168 =head1 AUTHOR
169
170 Dobrica Pavlinusic, C<< <dpavlin at rot13.org> >>
171
172 =head1 BUGS
173
174 Please report any bugs or feature requests to C<bug-redis at rt.cpan.org>, or through
175 the web interface at L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Redis>. I will be notified, and then you'll
176 automatically be notified of progress on your bug as I make changes.
177
178
179
180
181 =head1 SUPPORT
182
183 You can find documentation for this module with the perldoc command.
184
185 perldoc Redis
186
187
188 You can also look for information at:
189
190 =over 4
191
192 =item * RT: CPAN's request tracker
193
194 L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Redis>
195
196 =item * AnnoCPAN: Annotated CPAN documentation
197
198 L<http://annocpan.org/dist/Redis>
199
200 =item * CPAN Ratings
201
202 L<http://cpanratings.perl.org/d/Redis>
203
204 =item * Search CPAN
205
206 L<http://search.cpan.org/dist/Redis>
207
208 =back
209
210
211 =head1 ACKNOWLEDGEMENTS
212
213
214 =head1 COPYRIGHT & LICENSE
215
216 Copyright 2009 Dobrica Pavlinusic, all rights reserved.
217
218 This program is free software; you can redistribute it and/or modify it
219 under the same terms as Perl itself.
220
221
222 =cut
223
224 1; # End of Redis

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