maintenance/mcc.php

   1 <?php
   2 /**
   3  * memcached diagnostic tool
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @todo document
  22  * @ingroup Maintenance
  23  */
  24
  25 /** */
  26 require_once __DIR__ . '/commandLine.inc';
  27
  28 $options = getopt( '', array( 'debug', 'help', 'cache:' ) );
  29
  30 $debug = isset( $options['debug'] );
  31 $help = isset( $options['help'] );
  32 $cache = isset( $options['cache'] ) ? $options['cache'] : null;
  33
  34 if ( $help ) {
  35         mccShowUsage();
  36         exit( 0 );
  37 }
  38 $mcc = new MWMemcached( array(
  39         'persistent' => true,
  40         'debug' => $debug,
  41 ) );
  42
  43 if ( $cache ) {
  44         if ( !isset( $wgObjectCaches[$cache] ) ) {
  45                 print "MediaWiki isn't configured with a cache named '$cache'";
  46                 exit( 1 );
  47         }
  48         $servers = $wgObjectCaches[$cache]['servers'];
  49 } elseif ( $wgMainCacheType === CACHE_MEMCACHED ) {
  50         $mcc->set_servers( $wgMemCachedServers );
  51 } elseif ( isset( $wgObjectCaches[$wgMainCacheType]['servers'] ) ) {
  52         $mcc->set_servers( $wgObjectCaches[$wgMainCacheType]['servers'] );
  53 } else {
  54         print "MediaWiki isn't configured for Memcached usage\n";
  55         exit( 1 );
  56 }
  57
  58 /**
  59  * Show this command line tool usage.
  60  */
  61 function mccShowUsage() {
  62         echo <<<EOF
  63 Usage:
  64         mcc.php [--debug]
  65         mcc.php --help
  66
  67 MemCached Command (mcc) is an interactive command tool that let you interact
  68 with the MediaWiki memcached cache.
  69
  70 Options:
  71         --debug Set debug mode on the memcached connection.
  72         --help  This help screen.
  73
  74 Interactive commands:
  75
  76 EOF;
  77         print "\t";
  78         print str_replace( "\n", "\n\t", mccGetHelp( false ) );
  79         print "\n";
  80 }
  81
  82 function mccGetHelp( $command ) {
  83         $output = '';
  84         $commandList = array(
  85                 'get' => 'grabs something',
  86                 'getsock' => 'lists sockets',
  87                 'set' => 'changes something',
  88                 'delete' => 'deletes something',
  89                 'history' => 'show command line history',
  90                 'server' => 'show current memcached server',
  91                 'dumpmcc' => 'shows the whole thing',
  92                 'exit' => 'exit mcc',
  93                 'quit' => 'exit mcc',
  94                 'help' => 'help about a command',
  95         );
  96         if ( !$command ) {
  97                 $command = 'fullhelp';
  98         }
  99         if ( $command === 'fullhelp' ) {
 100                 $max_cmd_len = max( array_map( 'strlen', array_keys( $commandList ) ) );
 101                 foreach ( $commandList as $cmd => $desc ) {
 102                         $output .= sprintf( "%-{$max_cmd_len}s: %s\n", $cmd, $desc );
 103                 }
 104         } elseif ( isset( $commandList[$command] ) ) {
 105                 $output .= "$command: $commandList[$command]\n";
 106         } else {
 107                 $output .= "$command: command does not exist or no help for it\n";
 108         }
 109
 110         return $output;
 111 }
 112
 113 do {
 114         $bad = false;
 115         $showhelp = false;
 116         $quit = false;
 117
 118         $line = Maintenance::readconsole();
 119         if ( $line === false ) {
 120                 exit;
 121         }
 122
 123         $args = explode( ' ', $line );
 124         $command = array_shift( $args );
 125
 126         // process command
 127         switch ( $command ) {
 128                 case 'help':
 129                         // show an help message
 130                         print mccGetHelp( array_shift( $args ) );
 131                         break;
 132
 133                 case 'get':
 134                         $sub = '';
 135                         if ( array_key_exists( 1, $args ) ) {
 136                                 $sub = $args[1];
 137                         }
 138                         print "Getting {$args[0]}[$sub]\n";
 139                         $res = $mcc->get( $args[0] );
 140                         if ( array_key_exists( 1, $args ) ) {
 141                                 $res = $res[$args[1]];
 142                         }
 143                         if ( $res === false ) {
 144                                 # print 'Error: ' . $mcc->error_string() . "\n";
 145                                 print "MemCached error\n";
 146                         } elseif ( is_string( $res ) ) {
 147                                 print "$res\n";
 148                         } else {
 149                                 var_dump( $res );
 150                         }
 151                         break;
 152
 153                 case 'getsock':
 154                         $res = $mcc->get( $args[0] );
 155                         $sock = $mcc->get_sock( $args[0] );
 156                         var_dump( $sock );
 157                         break;
 158
 159                 case 'server':
 160                         if ( $mcc->_single_sock !== null ) {
 161                                 print $mcc->_single_sock . "\n";
 162                                 break;
 163                         }
 164                         $res = $mcc->get( $args[0] );
 165                         $hv = $mcc->_hashfunc( $args[0] );
 166                         for ( $i = 0; $i < 3; $i++ ) {
 167                                 print $mcc->_buckets[$hv % $mcc->_bucketcount] . "\n";
 168                                 $hv += $mcc->_hashfunc( $i . $args[0] );
 169                         }
 170                         break;
 171
 172                 case 'set':
 173                         $key = array_shift( $args );
 174                         if ( $args[0] == "#" && is_numeric( $args[1] ) ) {
 175                                 $value = str_repeat( '*', $args[1] );
 176                         } else {
 177                                 $value = implode( ' ', $args );
 178                         }
 179                         if ( !$mcc->set( $key, $value, 0 ) ) {
 180                                 # print 'Error: ' . $mcc->error_string() . "\n";
 181                                 print "MemCached error\n";
 182                         }
 183                         break;
 184
 185                 case 'delete':
 186                         $key = implode( ' ', $args );
 187                         if ( !$mcc->delete( $key ) ) {
 188                                 # print 'Error: ' . $mcc->error_string() . "\n";
 189                                 print "MemCached error\n";
 190                         }
 191                         break;
 192
 193                 case 'history':
 194                         if ( function_exists( 'readline_list_history' ) ) {
 195                                 foreach ( readline_list_history() as $num => $line ) {
 196                                         print "$num: $line\n";
 197                                 }
 198                         } else {
 199                                 print "readline_list_history() not available\n";
 200                         }
 201                         break;
 202
 203                 case 'dumpmcc':
 204                         var_dump( $mcc );
 205                         break;
 206
 207                 case 'quit':
 208                 case 'exit':
 209                         $quit = true;
 210                         break;
 211
 212                 default:
 213                         $bad = true;
 214         } // switch() end
 215
 216         if ( $bad ) {
 217                 if ( $command ) {
 218                         print "Bad command\n";
 219                 }
 220         } else {
 221                 if ( function_exists( 'readline_add_history' ) ) {
 222                         readline_add_history( $line );
 223                 }
 224         }
 225 } while ( !$quit );