src/Biz/CloudPlatform/Client/FailoverCloudAPI.php

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<?php

namespace Biz\CloudPlatform\Client;

class FailoverCloudAPI extends AbstractCloudAPI
{
    const FAILOVER_COUNT = 3;

    protected $servers = array();

    protected $serverConfigPath = null;

    protected $apiType = null;

    protected $rootApiUrl = null;

    public function __construct(array $options)
    {
        parent::__construct($options);
        $this->rootApiUrl = $this->apiUrl;
    }

    protected function _request($method, $uri, $params, $headers)
    {
        try {
            $result = parent::_request($method, $uri, $params, $headers);

            if ($this->servers['next_refresh_time'] < time()) {
                $self = $this;
                $this->servers = $this->refreshServerConfigFile(function () use ($self) {
                    return $self->getServerList(0);
                }, 'noneblocking');
            }

            return $result;
        } catch (CloudAPIIOException $e) {
            if ($this->apiType !== 'leaf') {
                throw $e;
            }

            $that = $this;
            $this->refreshServerConfigFile(function ($fp, $data, $maxFailoverCount) use ($that) {
                if (($data['failed_expired'] > 0) && ($data['failed_expired'] > time())) {
                    ++$data['failed_count'];
                } else {
                    $data['failed_count'] = 1;
                    $data['failed_expired'] = time() + 120;
                }

                if ($data['failed_count'] == $maxFailoverCount) {
                    $data = $that->voteLeafServer($data);
                }

                return $data;
            }, 'nonblocking');

            throw $e;
        }
    }