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Code Issues Releases Wiki Activity

Changed: the way caches expire. (see dev forum)

Browse Source 
Added: "private" caching. (see dev forum too ;))


git-svn-id: file:///svn/phpbb/trunk@4684 89ea8834-ac86-4346-8a33-228a782c2dd0
This commit is contained in:
Ludovic Arnaud
2003-11-26 23:34:33 +00:00
parent 1dd9ad2f79
commit ac0b5d79ad
2 changed files with 203 additions and 117 deletions
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193
phpBB/includes/acm/acm_db.php
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@@ -13,30 +13,51 @@
class acm
{
// Contains all loaded variables
var $vars = '';
var $is_modified = FALSE;
// Contains the names of the variables that are ready to be used
// (iow, variables that have been unserialized)
var $var_ready = array();
// Contains variables that have been updated or destroyed this session
var $var_expires = array();
// Contains variables that have already been requested
// If a variable has been requested but not loaded, it simply means it
// wasn't found in the db
var $var_requested = array();
function load($var_names = '')
{
global $db;
$this->vars = array();
$sql = 'SELECT var_name, var_ts, var_data
FROM ' . CACHE_TABLE;
if (!empty($var_names))
if (is_array($var_names))
{
$sql .= "\nWHERE var_name IN ('" . implode("', '", $var_names) . "')";
$var_requested = $var_names;
$sql_condition = "var_name IN ('" . implode("', '", $var_names) . "')";
}
else
{
// $sql_condition = "var_name NOT LIKE '\_%'";
$sql_condition = "LEFT(var_name, 1) <> '_'";
}
$sql = 'SELECT var_name, var_data
FROM ' . CACHE_TABLE . '
WHERE var_expires > ' . time() . "
AND $sql_condition";
$result = $db->sql_query($sql);
while ($row = $db->sql_fetchrow($result))
{
$this->vars[$row['var_name']] = array(
'data' => unserialize($row['var_data']),
'ts' => intval($row['var_ts'])
);
$this->vars[$row['var_name']] = $row['var_data'];
if (!$var_names)
{
$var_requested[] = $row['var_name'];
}
}
}
@@ -48,31 +69,22 @@ class acm
function save()
{
if (!$this->is_modified)
{
return;
}
global $db;
$delete = $insert = array();
foreach ($this->vars as $var_name => $var_ary)
foreach ($this->var_expires as $var_name => $expires)
{
if (!empty($var_ary['is_modified']))
if ($expires == 'now')
{
if (!empty($var_ary['delete']))
{
$delete[] = $var_name;
}
else
{
$delete[] = $var_name;
$insert[] = "'$var_name', " . time() . ", '" . $db->sql_escape(serialize($var_ary['data'])) . "'";
}
$this->vars[$var_name]['is_modified'] = FALSE;
$delete[] = $var_name;
}
else
{
$delete[] = $var_name;
$insert[] = "'$var_name', $expires, '" . $db->sql_escape(serialize($this->vars[$var_name])) . "'";
}
}
$this->var_expires = array();
if (count($delete))
{
@@ -85,7 +97,8 @@ class acm
switch (SQL_LAYER)
{
case 'mysql':
$sql = 'INSERT INTO ' . CACHE_TABLE . ' (var_name, var_ts, var_data)
case 'mysql4':
$sql = 'INSERT INTO ' . CACHE_TABLE . ' (var_name, var_expires, var_data)
VALUES (' . implode('), (', $insert) . ')';
$db->sql_query($sql);
break;
@@ -93,70 +106,114 @@ class acm
default:
foreach ($insert as $values)
{
$sql = 'INSERT INTO ' . CACHE_TABLE . " (var_name, var_ts, var_data)
$sql = 'INSERT INTO ' . CACHE_TABLE . " (var_name, var_expires, var_data)
VALUES ($values)";
$db->sql_query($sql);
}
}
}
$this->is_modified = FALSE;
}
function tidy($max_age = 0)
function tidy()
{
global $db;
$sql = 'DELETE FROM ' . CACHE_TABLE . '
WHERE var_ts < ' . (time() - $max_age);
WHERE var_expires < ' . time();
$db->sql_query($sql);
}
function get($var_name, $max_age = 0)
{
return ($this->exists($var_name, $max_age)) ? $this->vars[$var_name]['data'] : NULL;
}
function put($var_name, $var_data)
{
$this->vars[$var_name] = array(
'data' => $var_data,
'ts' => time(),
'is_modified' => TRUE
);
$this->is_modified = TRUE;
}
function destroy($var_name, $void = NULL)
{
if (isset($this->vars[$var_name]))
{
$this->is_modified = TRUE;
$this->vars[$var_name] = array(
'is_modified' => TRUE,
'delete' => TRUE
);
}
}
function exists($var_name, $max_age = 0)
function get($var_name)
{
if (!is_array($this->vars))
{
$this->load();
}
if ($max_age > 0 && isset($this->vars[$var_name]))
if ($var_name{0} == '_')
{
if ($this->vars[$var_name]['ts'] + $max_age < time())
if (!in_array($this->var_requested, $var_name))
{
$this->destroy($var_name);
return FALSE;
$this->var_requested[] = $var_name;
global $db;
$sql = 'SELECT var_data
FROM ' . CACHE_TABLE . "
WHERE var_name = '$var_name'
AND var_expires > " . time();
$result = $db->sql_query($sql);
if ($row = $db->sql_fetchrow($result))
{
$this->vars[$var_name] = $row['var_data'];
}
}
}
if ($this->exists($var_name))
{
if (empty($this->var_ready[$var_name]))
{
$this->vars[$var_name] = unserialize($this->vars[$var_name]);
$this->var_ready[$var_name] = TRUE;
}
return $this->vars[$var_name];
}
else
{
return NULL;
}
}
function put($var_name, $var_data, $ttl = 31536000)
{
$this->vars[$var_name] = $var_data;
if ($var_name{0} == '_')
{
global $db;
switch (SQL_LAYER)
{
case 'mysql':
case 'mysql4':
$INSERT = 'REPLACE';
break;
default:
$sql = 'DELETE FROM ' . CACHE_TABLE . "
WHERE var_name = '$var_name'";
$db->sql_query($sql);
$INSERT = 'INSERT';
}
$sql = "$INSERT INTO " . CACHE_TABLE . " (var_name, var_expires, var_data)
VALUES ('$var_name', " . (time() + $ttl) . ", '" . $db->sql_escape(serialize($var_data)) . "')";
$db->sql_query($sql);
}
else
{
$this->var_expires[$var_name] = time() + $ttl;
}
}
function destroy($var_name, $void = NULL)
{
if (isset($this->vars[$var_name]))
{
$this->var_expires[$var_name] = 'now';
unset($this->vars[$var_name]);
}
}
function exists($var_name)
{
if (!is_array($this->vars))
{
$this->load();
}
return isset($this->vars[$var_name]);
}
}