/**
* Logical implementation of the store() command
*/
public function store(Memento\Key $key, $value, $expires)
{
// memcache can't store expires longer than 30 days
if ($expires > self::MAX_EXPIRES) {
return false;
}
// get primary key string
$keyStr = $this->groupKey ? $this->groupKey->getKey() : $key->getKey();
if (!$this->__connect($key)) {
return false;
}
// primary key stores a basic map, potentially to other keys
$meta = array(Memento\Hash::FIELD_CREATED => time(), Memento\Hash::FIELD_EXPIRES => $expires, Memento\Hash::FIELD_VALID => $keyStr . '::' . $keyStr . Memento\Hash::FIELD_VALID);
// handle arguments based on group or single key
if ($this->groupKey) {
// group keys store a keys field which points to a key storing the key map
$meta[Memento\Hash::FIELD_KEYS] = $keyStr . '::' . $keyStr . Memento\Hash::FIELD_KEYS;
// key which will contain the data
$singleKey = $meta[Memento\Hash::FIELD_KEYS] . '_' . $key->getKey();
// initial key map
$keys = array($key->getKey() => $singleKey);
// valid state
$valid = true;
// look for existing key map
$keys = $this->memcache->get($meta[Memento\Hash::FIELD_KEYS]);
if (!is_array($keys)) {
$keys = array();
}
$keys[$key->getKey()] = $singleKey;
// update the keys map
$this->memcache->set($meta[Memento\Hash::FIELD_KEYS], $keys, null, $expires);
// save the data with mapped key
$this->memcache->set($singleKey, $value, null, $expires);
} else {
// store data in meta
$meta[Memento\Hash::FIELD_DATA] = $keyStr . '::' . $keyStr . Memento\Hash::FIELD_DATA;
// valid state
$valid = true;
// store data
$this->memcache->set($meta[Memento\Hash::FIELD_DATA], $value, null, $expires);
}
// store meta data
$metaStored = $this->memcache->set($keyStr, $meta, null, $expires);
// store valid state
$validStored = $this->memcache->set($meta[Memento\Hash::FIELD_VALID], $valid, null, $expires);
$this->__disconnect();
if ($metaStored && $validStored) {
return true;
}
return false;
}
/**
* Logical implementation of the retrieve() command
*/
public function retrieve(Memento\Key $key)
{
if ($this->groupKey) {
$data = $this->redis->hget($this->groupKey->getKey(), $key->getKey());
} else {
$data = $this->redis->hget($key->getKey(), Memento\Hash::FIELD_DATA);
}
// unserialize data
$value = unserialize($data);
if (false === $value) {
return NULL;
}
return $value;
}