php-beanstalkd消息队列类实例分享

本文实例为大家分享了php beanstalkd消息队列类的具体代码,供大家参考,具体内容如下

use RuntimeException;

/**

/**

  • Minimum priority value which can be assigned to a job. The minimum
  • priority value is also the highest priority a job can have.
  • @var integer
    */
    const MIN_PRIORITY = 0;

/**

  • Maximum priority value which can be assigned to a job. The maximum
  • priority value is also the lowest priority a job can have.
  • @var integer
    */
    const MAX_PRIORITY = 4294967295;

/**

  • Holds a boolean indicating whether a connection to the server is
  • currently established or not.
  • @var boolean
    */
    public $connected = false;

/**

  • Holds configuration values.
  • @var array
    */
    protected $_config = [];

/**

  • The current connection resource handle (if any).
  • @var resource
    */
    protected $_connection;

/**

  • Constructor.
  • @param array $config An array of configuration values:
    • 'persistent' Whether to make the connection persistent or
  • not,defaults to true as the FAQ recommends
  • persistent connections.
    • 'host' The beanstalk server hostname or IP address to
  • connect to,defaults to 127.0.0.1.
    • 'port' The port of the server to connect to,defaults
  • to 11300.
    • 'timeout' Timeout in seconds when establishing the
  • connection,defaults to 1.
    • 'logger' An instance of a PSR-3 compatible logger.
  • @link https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md
  • @return void
    */
    public function __construct(array $config = []) {
    $defaults = [
    'persistent' => true,'host' => '127.0.0.1','port' => 11300,'timeout' => 1,'logger' => null
    ];
    $this->_config = $config + $defaults;
    }

/**

  • Destructor,disconnects from the server.
  • @return void
    */
    public function __destruct() {
    $this->disconnect();
    }

/**

  • Initiates a socket connection to the beanstalk server. The resulting
  • stream will not have any timeout set on it. Which means it can wait
  • an unlimited amount of time until a packet becomes available. This
  • is required for doing blocking reads.
  • @see \Beanstalk\Client::$_connection
  • @see \Beanstalk\Client::reserve()
  • @return boolean true if the connection was established,false otherwise.
    */
    public function connect() {
    if (isset($this->_connection)) {
    $this->disconnect();
    }
    $errNum = '';
    $errStr = '';
    $function = $this->_config['persistent'] ? 'pfsockopen' : 'fsockopen';
    $params = [$this->_config['host'],$this->_config['port'],&$errNum,&$errStr];
if ($this->_config['timeout']) {
  $params[] = $this->_config['timeout'];
}
$this->_connection = @call_user_func_array($function,$params);

if (!empty($errNum) || !empty($errStr)) {
  $this->_error("{$errNum}: {$errStr}");
}

$this->connected = is_resource($this->_connection);

if ($this->connected) {
  stream_set_timeout($this->_connection,-1);
}
return $this->connected;

}

/**

  • Closes the connection to the beanstalk server by first signaling

  • that we want to quit then actually closing the socket connection.

  • @return boolean true if diconnecting was successful.
    */
    public function disconnect() {
    if (!is_resource($this->_connection)) {
    $this->connected = false;
    } else {
    $this->_write('quit');
    $this->connected = !fclose($this->_connection);

    if (!$this->connected) {
    $this->_connection = null;
    }
    }
    return !$this->connected;
    }

/**

  • Pushes an error message to the logger,when one is configured.
  • @param string $message The error message.
  • @return void
    */
    protected function _error($message) {
    if ($this->_config['logger']) {
    $this->_config['logger']->error($message);
    }
    }

public function errors()
{
return $this->_config['logger'];
}
/**

  • Writes a packet to the socket. Prior to writing to the socket will
  • check for availability of the connection.
  • @param string $data
  • @return integer|boolean number of written bytes or false on error.
    */
    protected function _write($data) {
    if (!$this->connected) {
    $message = 'No connecting found while writing data to socket.';
    throw new RuntimeException($message);
    }
$data .= "\r\n";
return fwrite($this->_connection,$data,strlen($data));

}

/**

  • Reads a packet from the socket. Prior to reading from the socket

  • will check for availability of the connection.

  • @param integer $length Number of bytes to read.

  • @return string|boolean Data or false on error.
    */
    protected function _read($length = null) {
    if (!$this->connected) {
    $message = 'No connection found while reading data from socket.';
    throw new RuntimeException($message);
    }
    if ($length) {
    if (feof($this->_connection)) {
    return false;
    }
    $data = stream_get_contents($this->_connection,$length + 2);
    $meta = stream_get_meta_data($this->_connection);

    if ($meta['timed_out']) {
    $message = 'Connection timed out while reading data from socket.';
    throw new RuntimeException($message);
    }
    $packet = rtrim($data,"\r\n");
    } else {
    $packet = stream_get_line($this->_connection,16384,"\r\n");
    }
    return $packet;
    }

/ Producer Commands /

/**

  • The put command is for any process that wants to insert a job into the queue.
  • @param integer $pri Jobs with smaller priority values will be scheduled
  • before jobs with larger priorities. The most urgent priority is
  • 0; the least urgent priority is 4294967295.
  • @param integer $delay Seconds to wait before putting the job in the
  • ready queue. The job will be in the "delayed" state during this time.
  • @param integer $ttr Time to run - Number of seconds to allow a worker to
  • run this job. The minimum ttr is 1.
  • @param string $data The job body.
  • @return integer|boolean false on error otherwise an integer indicating
  • the job id.
    */
    public function put($pri,$delay,$ttr,$data) {
    $this->_write(sprintf("put %d %d %d %d\r\n%s",$pri,strlen($data),$data));
    $status = strtok($this->_read(),' ');
switch ($status) {
  case 'INSERTED':
  case 'BURIED':
    return (integer) strtok(' '); // job id
  case 'EXPECTED_CRLF':
  case 'JOB_TOO_BIG':
  default:
    $this->_error($status);
    return false;
}

}

/**

  • The use command is for producers. Subsequent put commands will put
  • jobs into the tube specified by this command. If no use command has
  • been issued,jobs will be put into the tube named default.
  • @param string $tube A name at most 200 bytes. It specifies the tube to
  • use. If the tube does not exist,it will be created.
  • @return string|boolean false on error otherwise the name of the tube.
    */
    public function useTube($tube) {
    $this->_write(sprintf('use %s',$tube));
    $status = strtok($this->_read(),' ');
switch ($status) {
  case 'USING':
    return strtok(' ');
  default:
    $this->_error($status);
    return false;
}

}

/**

  • Pause a tube delaying any new job in it being reserved for a given time.
  • @param string $tube The name of the tube to pause.
  • @param integer $delay Number of seconds to wait before reserving any more
  • jobs from the queue.
  • @return boolean false on error otherwise true.
    */
    public function pauseTube($tube,$delay) {
    $this->_write(sprintf('pause-tube %s %d',$tube,$delay));
    $status = strtok($this->_read(),' ');
switch ($status) {
  case 'PAUSED':
    return true;
  case 'NOT_FOUND':
  default:
    $this->_error($status);
    return false;
}

}

/ Worker Commands /

/**

  • Reserve a job (with a timeout).
  • @param integer $timeout If given specifies number of seconds to wait for
  • a job. 0 returns immediately.
  • @return array|false false on error otherwise an array holding job id
  • and body.
    */
    public function reserve($timeout = null) {
    if (isset($timeout)) {
    $this->_write(sprintf('reserve-with-timeout %d',$timeout));
    } else {
    $this->_write('reserve');
    }
    $status = strtok($this->_read(),' ');
switch ($status) {
  case 'RESERVED':
    return [
      'id' => (integer) strtok(' '),'body' => $this->_read((integer) strtok(' '))
    ];
  case 'DEADLINE_SOON':
  case 'TIMED_OUT':
  default:
    $this->_error($status);
    return false;
}

}

/**

  • Removes a job from the server entirely.
  • @param integer $id The id of the job.
  • @return boolean false on error,true on success.
    */
    public function delete($id) {
    $this->_write(sprintf('delete %d',$id));
    $status = $this->_read();
switch ($status) {
  case 'DELETED':
    return true;
  case 'NOT_FOUND':
  default:
    $this->_error($status);
    return false;
}

}

/**

  • Puts a reserved job back into the ready queue.
  • @param integer $id The id of the job.
  • @param integer $pri Priority to assign to the job.
  • @param integer $delay Number of seconds to wait before putting the job in the ready queue.
  • @return boolean false on error,true on success.
    */
    public function release($id,$delay) {
    $this->_write(sprintf('release %d %d %d',$id,$delay));
    $status = $this->_read();
switch ($status) {
  case 'RELEASED':
  case 'BURIED':
    return true;
  case 'NOT_FOUND':
  default:
    $this->_error($status);
    return false;
}

}

/**

  • Puts a job into the buried state Buried jobs are put into a FIFO
  • linked list and will not be touched until a client kicks them.
  • @param integer $id The id of the job.
  • @param integer $pri New priority to assign to the job.
  • @return boolean false on error,true on success.
    */
    public function bury($id,$pri) {
    $this->_write(sprintf('bury %d %d',$pri));
    $status = $this->_read();
switch ($status) {
  case 'BURIED':
    return true;
  case 'NOT_FOUND':
  default:
    $this->_error($status);
    return false;
}

}

/**

  • Allows a worker to request more time to work on a job.
  • @param integer $id The id of the job.
  • @return boolean false on error,true on success.
    */
    public function touch($id) {
    $this->_write(sprintf('touch %d',$id));
    $status = $this->_read();
switch ($status) {
  case 'TOUCHED':
    return true;
  case 'NOT_TOUCHED':
  default:
    $this->_error($status);
    return false;
}

}

/**

  • Adds the named tube to the watch list for the current connection.
  • @param string $tube Name of tube to watch.
  • @return integer|boolean false on error otherwise number of tubes in watch list.
    */
    public function watch($tube) {
    $this->_write(sprintf('watch %s',' ');
switch ($status) {
  case 'WATCHING':
    return (integer) strtok(' ');
  default:
    $this->_error($status);
    return false;
}

}

/**

  • Remove the named tube from the watch list.
  • @param string $tube Name of tube to ignore.
  • @return integer|boolean false on error otherwise number of tubes in watch list.
    */
    public function ignore($tube) {
    $this->_write(sprintf('ignore %s',' ');
switch ($status) {
  case 'WATCHING':
    return (integer) strtok(' ');
  case 'NOT_IGNORED':
  default:
    $this->_error($status);
    return false;
}

}

/ Other Commands /

/**

  • Inspect a job by its id.
  • @param integer $id The id of the job.
  • @return string|boolean false on error otherwise the body of the job.
    */
    public function peek($id) {
    $this->_write(sprintf('peek %d',$id));
    return $this->_peekRead();
    }

/**

  • Inspect the next ready job.
  • @return string|boolean false on error otherwise the body of the job.
    */
    public function peekReady() {
    $this->_write('peek-ready');
    return $this->_peekRead();
    }

/**

  • Inspect the job with the shortest delay left.
  • @return string|boolean false on error otherwise the body of the job.
    */
    public function peekDelayed() {
    $this->_write('peek-delayed');
    return $this->_peekRead();
    }

/**

  • Inspect the next job in the list of buried jobs.
  • @return string|boolean false on error otherwise the body of the job.
    */
    public function peekBuried() {
    $this->_write('peek-buried');
    return $this->_peekRead();
    }

/**

  • Handles response for all peek methods.
  • @return string|boolean false on error otherwise the body of the job.
    */
    protected function _peekRead() {
    $status = strtok($this->_read(),' ');
switch ($status) {
  case 'FOUND':
    return [
      'id' => (integer) strtok(' '),'body' => $this->_read((integer) strtok(' '))
    ];
  case 'NOT_FOUND':
  default:
    $this->_error($status);
    return false;
}

}

/**

  • Moves jobs into the ready queue (applies to the current tube).
  • If there are buried jobs those get kicked only otherwise delayed
  • jobs get kicked.
  • @param integer $bound Upper bound on the number of jobs to kick.
  • @return integer|boolean False on error otherwise number of jobs kicked.
    */
    public function kick($bound) {
    $this->_write(sprintf('kick %d',$bound));
    $status = strtok($this->_read(),' ');
switch ($status) {
  case 'KICKED':
    return (integer) strtok(' ');
  default:
    $this->_error($status);
    return false;
}

}

/**

  • This is a variant of the kick command that operates with a single
  • job identified by its job id. If the given job id exists and is in a
  • buried or delayed state,it will be moved to the ready queue of the
  • the same tube where it currently belongs.
  • @param integer $id The job id.
  • @return boolean false on error true otherwise.
    */
    public function kickJob($id) {
    $this->_write(sprintf('kick-job %d',$id));
    $status = strtok($this->_read(),' ');
switch ($status) {
  case 'KICKED':
    return true;
  case 'NOT_FOUND':
  default:
    $this->_error($status);
    return false;
}

}

/ Stats Commands /

/**

  • Gives statistical information about the specified job if it exists.
  • @param integer $id The job id.
  • @return string|boolean false on error otherwise a string with a yaml formatted dictionary.
    */
    public function statsJob($id) {
    $this->_write(sprintf('stats-job %d',$id));
    return $this->_statsRead();
    }

/**

  • Gives statistical information about the specified tube if it exists.
  • @param string $tube Name of the tube.
  • @return string|boolean false on error otherwise a string with a yaml formatted dictionary.
    */
    public function statsTube($tube) {
    $this->_write(sprintf('stats-tube %s',$tube));
    return $this->_statsRead();
    }

/**

  • Gives statistical information about the system as a whole.
  • @return string|boolean false on error otherwise a string with a yaml formatted dictionary.
    */
    public function stats() {
    $this->_write('stats');
    return $this->_statsRead();
    }

/**

  • Returns a list of all existing tubes.
  • @return string|boolean false on error otherwise a string with a yaml formatted list.
    */
    public function listTubes() {
    $this->_write('list-tubes');
    return $this->_statsRead();
    }

/**

  • Returns the tube currently being used by the producer.
  • @return string|boolean false on error otherwise a string with the name of the tube.
    */
    public function listTubeUsed() {
    $this->_write('list-tube-used');
    $status = strtok($this->_read(),' ');
switch ($status) {
  case 'USING':
    return strtok(' ');
  default:
    $this->_error($status);
    return false;
}

}

/**

  • Returns a list of tubes currently being watched by the worker.
  • @return string|boolean false on error otherwise a string with a yaml formatted list.
    */
    public function listTubesWatched() {
    $this->_write('list-tubes-watched');
    return $this->_statsRead();
    }

/**

  • Handles responses for all stat methods.
  • @param boolean $decode Whether to decode data before returning it or not. Default is true.
  • @return array|string|boolean false on error otherwise statistical data.
    */
    protected function _statsRead($decode = true) {
    $status = strtok($this->_read(),' ');
switch ($status) {
  case 'OK':
    $data = $this->_read((integer) strtok(' '));
    return $decode ? $this->_decode($data) : $data;
  default:
    $this->_error($status);
    return false;
}

}

/**

  • Decodes YAML data. This is a super naive decoder which just works on
  • a subset of YAML which is commonly returned by beanstalk.
  • @param string $data The data in YAML format,can be either a list or a dictionary.
  • @return array An (associative) array of the converted data.
    */
    protected function _decode($data) {
    $data = array_slice(explode("\n",$data),1);
    $result = [];
foreach ($data as $key => $value) {
  if ($value[0] === '-') {
    $value = ltrim($value,'- ');
  } elseif (strpos($value,':') !== false) {
    list($key,$value) = explode(':',$value);
    $value = ltrim($value,' ');
  }
  if (is_numeric($value)) {
    $value = (integer) $value == $value ? (integer) $value : (float) $value;
  }
  $result[$key] = $value;
}
return $result;

}
}

?>

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持编程之家。

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文章浏览阅读1k次。该错误通常出现在数据库读取结果集数据时,比如当我们写好SQL语句从数据库读取数据时,本身应该返回结果集,再给结果集中读取数据。解决思路:这种错误一般是因为echo后面输出了一个数组导致的,或者是数组作为字符串进行拼接运算时导致的。该错误直译为:警告:mysqli_fetch_assoc函数期望参数1是mysqli的结果集,但是给了一个布尔值。这种错误是PHP解析器在解析时遇到了语法错误,直译为:解析错误:语法错误,意料之外的...该错误直译为:提示:未定义的索引:username。_array to string conversion in
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文章浏览阅读1.3k次,点赞26次,收藏24次。复杂网络是一种由大量相互连接的元素(节点或顶点)组成的网络结构,这些连接通常是非常复杂和动态的。这些网络可以在各种领域中发现,包括社交网络、生物学系统、信息技术和交通系统等。_代理建模
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文章浏览阅读936次,点赞22次,收藏17次。本系统带文档lw万字以上文末可领取本课题的JAVA源码参考。
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