WindowsAzureSessionHandler 的 Write 方法

windowsazuresessionhandler.php

/**
 * Callback function for session handler. It's invoked while the session data is being written.
 *
 * @param $sessionId The session ID.
 * @param $sessionData The data to be written in session.
 *
 * @return boolean If the write operation success.
 */
public function write($sessionId, $sessionData) {
  // serialize and encode the session data.
  $serializedData = base64_encode(serialize($sessionData));

  try {
    // try to retrive the stored session entity and update it.
    $result = $this->_tableRestProxy->getEntity($this->_sessionContainer, $this->_sessionContainerPartition, $sessionId);
    $entity = $result->getEntity();

    // update data and expiry time
    $entity->setPropertyValue('data', $serializedData);
    $entity->setPropertyValue('expires', time());

    // update entity
    $this->_tableRestProxy->updateEntity($this->_sessionContainer, $entity);
  } catch (ServiceException $e) {
    // otherwise, create a new session entity to store the data.
    $entity = new Entity();

    // set partition key and use session id as the row key.
    $entity->setPartitionKey($this->_sessionContainerPartition);
    $entity->setRowKey($sessionId);
    // set data and expiry time
    $entity->addProperty('data', EdmType::STRING, $serializedData);
    $entity->addProperty('expires', EdmType::INT32, time());

    // insert the entity
    $this->_tableRestProxy->insertEntity($this->_sessionContainer, $entity);
  }
  return TRUE;
}