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 $optionsWithArgs = [ 'cache' ];
  26 $optionsWithoutArgs = [
  27         'debug', 'help'
  28 ];
  29 require_once __DIR__ . '/commandLine.inc';
  30
  31 $debug = isset( $options['debug'] );
  32 $help = isset( $options['help'] );
  33 $cache = $options['cache'] ?? null;
  34
  35 if ( $help ) {
  36         mccShowUsage();
  37         exit( 0 );
  38 }
  39 $mcc = new MemcachedClient( [
  40         'persistent' => true,
  41         'debug' => $debug,
  42 ] );
  43
  44 if ( $cache ) {
  45         if ( !isset( $wgObjectCaches[$cache] ) ) {
  46                 print "MediaWiki isn't configured with a cache named '$cache'";
  47                 exit( 1 );
  48         }
  49         $servers = $wgObjectCaches[$cache]['servers'];
  50 } elseif ( $wgMainCacheType === CACHE_MEMCACHED ) {
  51         $mcc->set_servers( $wgMemCachedServers );
  52 } elseif ( isset( $wgObjectCaches[$wgMainCacheType]['servers'] ) ) {
  53         $mcc->set_servers( $wgObjectCaches[$wgMainCacheType]['servers'] );
  54 } else {
  55         print "MediaWiki isn't configured for Memcached usage\n";
  56         exit( 1 );
  57 }
  58
  59 /**
  60  * Show this command line tool usage.
  61  */
  62 function mccShowUsage() {
  63         echo <<<EOF
  64 Usage:
  65         mcc.php [--debug]
  66         mcc.php --help
  67
  68 MemCached Command (mcc) is an interactive command tool that let you interact
  69 with the MediaWiki memcached cache.
  70
  71 Options:
  72         --debug Set debug mode on the memcached connection.
  73         --help  This help screen.
  74
  75 Interactive commands:
  76
  77 EOF;
  78         print "\t";
  79         print str_replace( "\n", "\n\t", mccGetHelp( false ) );
  80         print "\n";
  81 }
  82
  83 function mccGetHelp( $command ) {
  84         $output = '';
  85         $commandList = [
  86                 'get' => 'grabs something',
  87                 'getsock' => 'lists sockets',
  88                 'set' => 'changes something',
  89                 'delete' => 'deletes something',
  90                 'history' => 'show command line history',
  91                 'server' => 'show current memcached server',
  92                 'dumpmcc' => 'shows the whole thing',
  93                 'exit' => 'exit mcc',
  94                 'quit' => 'exit mcc',
  95                 'help' => 'help about a command',
  96         ];
  97         if ( !$command ) {
  98                 $command = 'fullhelp';
  99         }
 100         if ( $command === 'fullhelp' ) {
 101                 $max_cmd_len = max( array_map( 'strlen', array_keys( $commandList ) ) );
 102                 foreach ( $commandList as $cmd => $desc ) {
 103                         $output .= sprintf( "%-{$max_cmd_len}s: %s\n", $cmd, $desc );
 104                 }
 105         } elseif ( isset( $commandList[$command] ) ) {
 106                 $output .= "$command: $commandList[$command]\n";
 107         } else {
 108                 $output .= "$command: command does not exist or no help for it\n";
 109         }
 110
 111         return $output;
 112 }
 113
 114 do {
 115         $bad = false;
 116         $showhelp = false;
 117         $quit = false;
 118
 119         $line = Maintenance::readconsole();
 120         if ( $line === false ) {
 121                 exit;
 122         }
 123
 124         $args = explode( ' ', $line );
 125         $command = array_shift( $args );
 126
 127         // process command
 128         switch ( $command ) {
 129                 case 'help':
 130                         // show an help message
 131                         print mccGetHelp( array_shift( $args ) );
 132                         break;
 133
 134                 case 'get':
 135                         $sub = '';
 136                         if ( array_key_exists( 1, $args ) ) {
 137                                 $sub = $args[1];
 138                         }
 139                         print "Getting {$args[0]}[$sub]\n";
 140                         $res = $mcc->get( $args[0] );
 141                         if ( array_key_exists( 1, $args ) ) {
 142                                 $res = $res[$args[1]];
 143                         }
 144                         if ( $res === false ) {
 145                                 # print 'Error: ' . $mcc->error_string() . "\n";
 146                                 print "MemCached error\n";
 147                         } elseif ( is_string( $res ) ) {
 148                                 print "$res\n";
 149                         } else {
 150                                 var_dump( $res );
 151                         }
 152                         break;
 153
 154                 case 'getsock':
 155                         $res = $mcc->get( $args[0] );
 156                         $sock = $mcc->get_sock( $args[0] );
 157                         var_dump( $sock );
 158                         break;
 159
 160                 case 'server':
 161                         if ( $mcc->_single_sock !== null ) {
 162                                 print $mcc->_single_sock . "\n";
 163                                 break;
 164                         }
 165                         $res = $mcc->get( $args[0] );
 166                         $hv = $mcc->_hashfunc( $args[0] );
 167                         for ( $i = 0; $i < 3; $i++ ) {
 168                                 print $mcc->_buckets[$hv % $mcc->_bucketcount] . "\n";
 169                                 $hv += $mcc->_hashfunc( $i . $args[0] );
 170                         }
 171                         break;
 172
 173                 case 'set':
 174                         $key = array_shift( $args );
 175                         if ( $args[0] == "#" && is_numeric( $args[1] ) ) {
 176                                 $value = str_repeat( '*', $args[1] );
 177                         } else {
 178                                 $value = implode( ' ', $args );
 179                         }
 180                         if ( !$mcc->set( $key, $value, 0 ) ) {
 181                                 # print 'Error: ' . $mcc->error_string() . "\n";
 182                                 print "MemCached error\n";
 183                         }
 184                         break;
 185
 186                 case 'delete':
 187                         $key = implode( ' ', $args );
 188                         if ( !$mcc->delete( $key ) ) {
 189                                 # print 'Error: ' . $mcc->error_string() . "\n";
 190                                 print "MemCached error\n";
 191                         }
 192                         break;
 193
 194                 case 'history':
 195                         if ( function_exists( 'readline_list_history' ) ) {
 196                                 foreach ( readline_list_history() as $num => $line ) {
 197                                         print "$num: $line\n";
 198                                 }
 199                         } else {
 200                                 print "readline_list_history() not available\n";
 201                         }
 202                         break;
 203
 204                 case 'dumpmcc':
 205                         var_dump( $mcc );
 206                         break;
 207
 208                 case 'quit':
 209                 case 'exit':
 210                         $quit = true;
 211                         break;
 212
 213                 default:
 214                         $bad = true;
 215         } // switch() end
 216
 217         if ( $bad ) {
 218                 if ( $command ) {
 219                         print "Bad command\n";
 220                 }
 221         } else {
 222                 if ( function_exists( 'readline_add_history' ) ) {
 223                         readline_add_history( $line );
 224                 }
 225         }
 226 } while ( !$quit );