#
# 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.,
-# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
# http://www.gnu.org/copyleft/gpl.html
/**
*
* $bag = new MysqlBagOStuff($tablename); # connect to db first
*
* @package MediaWiki
- * @abstract
*/
class BagOStuff {
var $debugmode;
if($this->debugmode)
wfDebug("BagOStuff debug: $text\n");
}
+
+ /**
+ * Convert an optionally relative time to an absolute time
+ */
+ static function convertExpiry( $exptime ) {
+ if(($exptime != 0) && ($exptime < 3600*24*30)) {
+ return time() + $exptime;
+ } else {
+ return $exptime;
+ }
+ }
}
}
function set($key,$value,$exptime=0) {
- if(($exptime != 0) && ($exptime < 3600*24*30))
- $exptime = time() + $exptime;
- $this->bag[$key] = array( $value, $exptime );
+ $this->bag[$key] = array( $value, BagOStuff::convertExpiry( $exptime ) );
}
function delete($key,$time=0) {
* @abstract
* @package MediaWiki
*/
-class SqlBagOStuff extends BagOStuff {
+abstract class SqlBagOStuff extends BagOStuff {
var $table;
var $lastexpireall = 0;
}
if($row=$this->_fetchobject($res)) {
$this->_debug("get: retrieved data; exp time is " . $row->exptime);
- return $this->_unserialize($row->value);
+ return $this->_unserialize($this->_blobdecode($row->value));
} else {
$this->_debug('get: no matching rows');
}
function _blobencode($str) {
return $str;
}
- function _doinsert($table, $vals) {
- die( 'abstract function SqlBagOStuff::_doinsert() must be defined' );
- }
- function _doquery($sql) {
- die( 'abstract function SqlBagOStuff::_doquery() must be defined' );
+ function _blobdecode($str) {
+ return $str;
}
- function _fetchrow($res) {
- die( 'abstract function SqlBagOStuff::_fetchrow() must be defined' );
- }
+ abstract function _doinsert($table, $vals);
+ abstract function _doquery($sql);
function _freeresult($result) {
/* stub */
return 'unknown error';
}
- function _maxdatetime() {
- die( 'abstract function SqlBagOStuff::_maxdatetime() must be defined' );
- }
-
- function _fromunixtime() {
- die( 'abstract function SqlBagOStuff::_fromunixtime() must be defined' );
- }
+ abstract function _maxdatetime();
+ abstract function _fromunixtime($ts);
function garbageCollect() {
/* Ignore 99% of requests */
$serial = $decomp;
}
}
- wfdebug("serial: [$serial]\n");
$ret = unserialize( $serial );
return $ret;
}
$dbw =& wfGetDB( DB_MASTER );
return $dbw->encodeBlob($s);
}
+ function _blobdecode($s) {
+ $dbw =& wfGetDB( DB_MASTER );
+ return $dbw->decodeBlob($s);
+ }
function getTableName() {
if ( !$this->tableInitialised ) {
$dbw =& wfGetDB( DB_MASTER );
- /* This is actually a hack, we should be able
+ /* This is actually a hack, we should be able
to use Language classes here... or not */
if (!$dbw)
- die("Could not connect to database");
+ throw new MWException("Could not connect to database");
$this->table = $dbw->tableName( $this->table );
$this->tableInitialised = true;
}
}
}
+/**
+ * This is a wrapper for APC's shared memory functions
+ *
+ * @package MediaWiki
+ */
+
+class APCBagOStuff extends BagOStuff {
+ function get($key) {
+ $val = apc_fetch($key);
+ return $val;
+ }
+
+ function set($key, $value, $exptime=0) {
+ apc_store($key, $value, $exptime);
+ return true;
+ }
+
+ function delete($key, $time=0) {
+ apc_delete($key);
+ return true;
+ }
+}
+
+
/**
* This is a wrapper for eAccelerator's shared memory functions.
*
return true;
}
}
+
+class DBABagOStuff extends BagOStuff {
+ var $mHandler, $mFile, $mReader, $mWriter, $mDisabled;
+
+ function __construct( $handler = 'db3', $dir = false ) {
+ if ( $dir === false ) {
+ global $wgTmpDirectory;
+ $dir = $wgTmpDirectory;
+ }
+ $this->mFile = "$dir/mw-cache-" . wfWikiID();
+ $this->mFile .= '.db';
+ $this->mHandler = $handler;
+ }
+
+ /**
+ * Encode value and expiry for storage
+ */
+ function encode( $value, $expiry ) {
+ # Convert to absolute time
+ $expiry = BagOStuff::convertExpiry( $expiry );
+ return sprintf( '%010u', intval( $expiry ) ) . ' ' . serialize( $value );
+ }
+
+ /**
+ * @return list containing value first and expiry second
+ */
+ function decode( $blob ) {
+ if ( !is_string( $blob ) ) {
+ return array( null, 0 );
+ } else {
+ return array(
+ unserialize( substr( $blob, 11 ) ),
+ intval( substr( $blob, 0, 10 ) )
+ );
+ }
+ }
+
+ function getReader() {
+ if ( file_exists( $this->mFile ) ) {
+ $handle = dba_open( $this->mFile, 'rl', $this->mHandler );
+ } else {
+ $handle = $this->getWriter();
+ }
+ if ( !$handle ) {
+ wfDebug( "Unable to open DBA cache file {$this->mFile}\n" );
+ }
+ return $handle;
+ }
+
+ function getWriter() {
+ $handle = dba_open( $this->mFile, 'cl', $this->mHandler );
+ if ( !$handle ) {
+ wfDebug( "Unable to open DBA cache file {$this->mFile}\n" );
+ }
+ return $handle;
+ }
+
+ function get( $key ) {
+ wfProfileIn( __METHOD__ );
+ wfDebug( __METHOD__."($key)\n" );
+ $handle = $this->getReader();
+ if ( !$handle ) {
+ return null;
+ }
+ $val = dba_fetch( $key, $handle );
+ list( $val, $expiry ) = $this->decode( $val );
+ # Must close ASAP because locks are held
+ dba_close( $handle );
+
+ if ( !is_null( $val ) && $expiry && $expiry < time() ) {
+ # Key is expired, delete it
+ $handle = $this->getWriter();
+ dba_delete( $key, $handle );
+ dba_close( $handle );
+ wfDebug( __METHOD__.": $key expired\n" );
+ $val = null;
+ }
+ wfProfileOut( __METHOD__ );
+ return $val;
+ }
+
+ function set( $key, $value, $exptime=0 ) {
+ wfProfileIn( __METHOD__ );
+ wfDebug( __METHOD__."($key)\n" );
+ $blob = $this->encode( $value, $exptime );
+ $handle = $this->getWriter();
+ if ( !$handle ) {
+ return false;
+ }
+ $ret = dba_replace( $key, $blob, $handle );
+ dba_close( $handle );
+ wfProfileOut( __METHOD__ );
+ return $ret;
+ }
+
+ function delete( $key, $time = 0 ) {
+ wfProfileIn( __METHOD__ );
+ $handle = $this->getWriter();
+ if ( !$handle ) {
+ return false;
+ }
+ $ret = dba_delete( $key, $handle );
+ dba_close( $handle );
+ wfProfileOut( __METHOD__ );
+ return $ret;
+ }
+
+ function add( $key, $value, $exptime = 0 ) {
+ wfProfileIn( __METHOD__ );
+ $blob = $this->encode( $value, $exptime );
+ $handle = $this->getWriter();
+ if ( !$handle ) {
+ return false;
+ }
+ $ret = dba_insert( $key, $blob, $handle );
+ # Insert failed, check to see if it failed due to an expired key
+ if ( !$ret ) {
+ list( $value, $expiry ) = $this->decode( dba_fetch( $key, $handle ) );
+ if ( $expiry < time() ) {
+ # Yes expired, delete and try again
+ dba_delete( $key, $handle );
+ $ret = dba_insert( $key, $blob, $handle );
+ # This time if it failed then it will be handled by the caller like any other race
+ }
+ }
+
+ dba_close( $handle );
+ wfProfileOut( __METHOD__ );
+ return $ret;
+ }
+}
+
?>
dépôts / lhc / web / wiklou.git / blobdiff