mcc.php

Go to the documentation of this file.

<?php
$optionsWithArgs = [ 'cache' ];
$optionsWithoutArgs = [
    'debug', 'help'
];
require_once __DIR__ . '/commandLine.inc';

$debug = isset( $options['debug'] );
$help = isset( $options['help'] );
$cache = $options['cache'] ?? null;

if ( $help ) {
    mccShowUsage();
    exit( 0 );
}
$mcc = new MemcachedClient( [
    'persistent' => true,
    'debug' => $debug,
] );

if ( $cache ) {
    if ( !isset( $wgObjectCaches[$cache] ) ) {
        print "MediaWiki isn't configured with a cache named '$cache'";
        exit( 1 );
    }
    $servers = $wgObjectCaches[$cache]['servers'];
} elseif ( $wgMainCacheType === CACHE_MEMCACHED ) {
    $mcc->set_servers( $wgMemCachedServers );
} elseif ( isset( $wgObjectCaches[$wgMainCacheType]['servers'] ) ) {
    $mcc->set_servers( $wgObjectCaches[$wgMainCacheType]['servers'] );
} else {
    print "MediaWiki isn't configured for Memcached usage\n";
    exit( 1 );
}

function mccShowUsage() {
    echo <<<EOF
Usage:
    mcc.php [--debug]
    mcc.php --help

MemCached Command (mcc) is an interactive command tool that let you interact
with the MediaWiki memcached cache.

Options:
    --debug Set debug mode on the memcached connection.
    --help  This help screen.

Interactive commands:

EOF;
    print "\t";
    print str_replace( "\n", "\n\t", mccGetHelp( false ) );
    print "\n";
}

function mccGetHelp( $command ) {
    $output = '';
    $commandList = [
        'get' => 'grabs something',
        'getsock' => 'lists sockets',
        'set' => 'changes something',
        'delete' => 'deletes something',
        'history' => 'show command line history',
        'server' => 'show current memcached server',
        'dumpmcc' => 'shows the whole thing',
        'exit' => 'exit mcc',
        'quit' => 'exit mcc',
        'help' => 'help about a command',
    ];
    if ( !$command ) {
        $command = 'fullhelp';
    }
    if ( $command === 'fullhelp' ) {
        $max_cmd_len = max( array_map( 'strlen', array_keys( $commandList ) ) );
        foreach ( $commandList as $cmd => $desc ) {
            $output .= sprintf( "%-{$max_cmd_len}s: %s\n", $cmd, $desc );
        }
    } elseif ( isset( $commandList[$command] ) ) {
        $output .= "$command: $commandList[$command]\n";
    } else {
        $output .= "$command: command does not exist or no help for it\n";
    }

    return $output;
}

do {
    $bad = false;
    $showhelp = false;
    $quit = false;

    $line = Maintenance::readconsole();
    if ( $line === false ) {
        exit;
    }

    $args = explode( ' ', $line );
    $command = array_shift( $args );

    // process command
    switch ( $command ) {
        case 'help':
            // show an help message
            print mccGetHelp( array_shift( $args ) );
            break;

        case 'get':
            $sub = '';
            if ( array_key_exists( 1, $args ) ) {
                $sub = $args[1];
            }
            print "Getting {$args[0]}[$sub]\n";
            $res = $mcc->get( $args[0] );
            if ( array_key_exists( 1, $args ) ) {
                $res = $res[$args[1]];
            }
            if ( $res === false ) {
                # print 'Error: ' . $mcc->error_string() . "\n";
                print "MemCached error\n";
            } elseif ( is_string( $res ) ) {
                print "$res\n";
            } else {
                var_dump( $res );
            }
            break;

        case 'getsock':
            $res = $mcc->get( $args[0] );
            $sock = $mcc->get_sock( $args[0] );
            var_dump( $sock );
            break;

        case 'server':
            if ( $mcc->_single_sock !== null ) {
                print $mcc->_single_sock . "\n";
                break;
            }
            $res = $mcc->get( $args[0] );
            $hv = $mcc->_hashfunc( $args[0] );
            for ( $i = 0; $i < 3; $i++ ) {
                print $mcc->_buckets[$hv % $mcc->_bucketcount] . "\n";
                $hv += $mcc->_hashfunc( $i . $args[0] );
            }
            break;

        case 'set':
            $key = array_shift( $args );
            if ( $args[0] == "#" && is_numeric( $args[1] ) ) {
                $value = str_repeat( '*', $args[1] );
            } else {
                $value = implode( ' ', $args );
            }
            if ( !$mcc->set( $key, $value, 0 ) ) {
                # print 'Error: ' . $mcc->error_string() . "\n";
                print "MemCached error\n";
            }
            break;

        case 'delete':
            $key = implode( ' ', $args );
            if ( !$mcc->delete( $key ) ) {
                # print 'Error: ' . $mcc->error_string() . "\n";
                print "MemCached error\n";
            }
            break;

        case 'history':
            if ( function_exists( 'readline_list_history' ) ) {
                foreach ( readline_list_history() as $num => $line ) {
                    print "$num: $line\n";
                }
            } else {
                print "readline_list_history() not available\n";
            }
            break;

        case 'dumpmcc':
            var_dump( $mcc );
            break;

        case 'quit':
        case 'exit':
            $quit = true;
            break;

        default:
            $bad = true;
    } // switch() end

    if ( $bad ) {
        if ( $command ) {
            print "Bad command\n";
        }
    } else {
        if ( function_exists( 'readline_add_history' ) ) {
            readline_add_history( $line );
        }
    }
} while ( !$quit );