Improved cache index changes detection (again)

Aleksander Machniak

2015-05-14 b120d42f5b944a7b4ff801b82f048b71ec2bd288

 program/lib/Roundcube/rcube_cache_shared.php

@@ -349,8 +349,16 @@
            $result = $this->add_record($this->ckey($key), $data);

            // make sure index will be updated
            if ($result && !array_key_exists($key, $this->cache_sums)) {
                $this->cache_sums[$key] = true;
            if ($result) {
                if (!array_key_exists($key, $this->cache_sums)) {
                    $this->cache_sums[$key] = true;
                }

                $this->load_index();

                if (!$this->index_changed && !in_array($key, $this->index)) {
                    $this->index_changed = true;
                }
            }

            return $result;
@@ -409,22 +417,29 @@
            // Remove all keys
            if ($key === null) {
                foreach ($this->index as $key) {
                    $this->delete_record($key, false);
                    $this->delete_record($this->ckey($key));
                }

                $this->index = array();
            }
            // Remove keys by name prefix
            else if ($prefix_mode) {
                foreach ($this->index as $k) {
                foreach ($this->index as $idx => $k) {
                    if (strpos($k, $key) === 0) {
                        $this->delete_record($k);
                        $this->delete_record($this->ckey($k));
                        unset($this->index[$idx]);
                    }
                }
            }
            // Remove one key by name
            else {
                $this->delete_record($key);
                $this->delete_record($this->ckey($key));
                if (($idx = array_search($key, $this->index)) !== false) {
                    unset($this->index[$idx]);
                }
            }

            $this->index_changed = true;

            return;
        }
@@ -475,21 +490,19 @@
            $this->debug('set', $key, $data, $result);
        }

        if ($result) {
            $this->index_changed = true;
        }

        return $result;
    }


    /**
     * Deletes entry from memcache/apc DB.
     *
     * @param string $key Cache key name
     *
     * @param boolean True on success, False on failure
     */
    private function delete_record($key, $index=true)
    private function delete_record($key)
    {
        $ckey = $this->ckey($key);

        if ($this->type == 'memcache') {
            // #1488592: use 2nd argument
            $result = $this->db->delete($ckey, 0);
@@ -502,15 +515,7 @@
            $this->debug('delete', $ckey, null, $result);
        }

        if ($result) {
            $this->index_changed = true;
        }

        if ($index) {
            if (($idx = array_search($key, $this->index)) !== false) {
                unset($this->index[$idx]);
            }
        }
        return $result;
    }