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<?php
/**
* memcached diagnostic tool
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @todo document
* @ingroup Maintenance
*/
$optionsWithArgs = [ 'cache' ];
$optionsWithoutArgs = [
'debug', 'help'
];
require_once __DIR__ . '/commandLine.inc';
$debug = isset( $options['debug'] );
$help = isset( $options['help'] );
$cache = isset( $options['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 );
}
/**
* Show this command line tool usage.
*/
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 );