PHP+RabbitMq示例展示

来源：互联网发布：php bbs论坛源码下载编辑：程序博客网时间：2024/06/05 01:18

注意事项：
1、accept.PHP消费者代码需要在命令行执行

RabbitMQCommand.php操作类代码

<?php/*  * amqp协议操作类，可以访问rabbitMQ  * 需先安装php_amqp扩展  */ class RabbitMQCommand{    public $configs=array();    //交换机名称    public $exchange_name='';    //队列名称    public $queue_name='';    //路由名称    public $route_key='';    //持久化    public $durable=True;     /*      * 自动删除      * exchange is deleted when all queues have finished using it      * queue is deleted when last consumer unsubscribes      *       */      public $autodelete = False;       /*     * 镜像      * 镜像队列，打开后消息会在节点之间复制，有master和slave的概念      */    public $mirror = False;      private $_conn = Null;      private $_exchange = Null;      private $_channel = Null;      private $_queue = Null;     public function __construct($configs=array(),$exchange_name='',$queue_name='',$route_key=''){        $this->setConfig($configs);        $this->exchange_name=$exchange_name;        $this->queue_name=$queue_name;        $this->route_key=$route_key;    }    private function setConfig($configs){        if(!is_array($configs)){            throw new Exception('config is not array');        }        if(!($configs['host'] && $configs['port'] && $configs['username'] && $configs['password'])){            throw new Exception('configs is empty');         }        if(empty($configs['vhost'])){            $configs['vhost']='/';        }        $configs['login']=$configs['username'];        unset($configs['username']);        $this->configs=$configs;    }    /*      * 设置是否持久化，默认为True      */     public function setDurable($durable){        $this->durable=$durable;    }    /*      * 设置是否自动删除      */     public function setAutoDelete($autodelete){        $this->autodelete=$autodelete;    }    /*      * 设置是否镜像      */    public function setMirror($mirror){        $this->mirror=$mirror;    }    /*      * 打开amqp连接      */      private function open(){        if(!$this->_conn){            try {                $this->_conn=new AMQPConnection($this->configs);                $this->_conn->connect();                $this->initConnection();            } catch (AMQPConnectionException $ex) {                throw new Exception('cannot connection rabbitmq',500);            }        }    }     /*      * rabbitmq连接不变      * 重置交换机，队列，路由等配置      */    public function reset($exchange_name,$queue_name,$route_key){        $this->exchange_name=$exchange_name;        $this->queue_name=$queue_name;        $this->route_key=$route_key;        $this->initConnection();    }      /*      * 初始化rabbit连接的相关配置      */     private function initConnection(){        if(empty($this->exchange_name) || empty($this->queue_name) || empty($this->route_key)){            throw new Exception('rabbitmq exhange_name or queue_name or route_key is empty',500);        }        //连接channel        $this->_channel=new AMQPChannel($this->_conn);        //创建交换机        $this->_exchange=new AMQPExchange($this->_channel);        $this->_exchange->setName($this->exchange_name);        $this->_exchange->setType(AMQP_EX_TYPE_DIRECT);        if($this->durable){            $this->_exchange->setFlags(AMQP_DURABLE);        }        if($this->autodelete){            $this->_exchange->setFlags(AMQP_AUTODELETE);        }        $this->_exchange->declare();        //创建队列        $this->_queue=new AMQPQueue($this->_channel);        $this->_queue->setName($this->queue_name);        if($this->durable){            $this->_queue->setFlags(AMQP_DURABLE);        }        if($this->autodelete){            $this->_queue->setFlags(AMQP_AUTODELETE);        }        if($this->mirror){            $this->_queue->setArgument('x-ha-policy','all');        }        $this->_queue->declare();        //将队列通过制定路由绑定到指定交换机上        $this->_queue->bind($this->exchange_name,$this->route_key);    }    public function close(){        if($this->_conn){            $this->_conn->disconnect();        }    }    public function __sleep(){        $this->close();        return array_keys(get_object_vars($this));    }    public function __destruct(){        $this->close();    }    /*      * 生产者发送消息      */      public function send($msg) {          $this->open();          if(is_array($msg)){              $msg = json_encode($msg);          }else{              $msg = trim(strval($msg));          }          return $this->_exchange->publish($msg, $this->route_key);      }      /*      * 消费者      * $fun_name = array($classobj,$function) or function name string      * $autoack 是否自动应答      *       * function processMessage($envelope, $queue) {             $msg = $envelope->getBody();              echo $msg."\n"; //处理消息             $queue->ack($envelope->getDeliveryTag());//手动应答         }      */     public function run($fun_name,$autoack=True){        $this->open();        if(!$fun_name || !$this->_queue) return false;        while(True){            if($autoack) $this->_queue->consume($fun_name,AMQP_AUTOACK);            else $this->_queue->consume($fun_name);        }    }}

send.php生产者代码

<?php  set_time_limit(0);  include_once('RabbitMQCommand.php');  $configs = array('host'=>'127.0.0.1','port'=>5672,'username'=>'asdf','password'=>'123456','vhost'=>'/');  $exchange_name = 'class-e-1';  $queue_name = 'class-q-1';  $route_key = 'class-r-1';  $ra = new RabbitMQCommand($configs,$exchange_name,$queue_name,$route_key);  for($i=0;$i<=100;$i++){      $ra->send(date('Y-m-d H:i:s',time()));  }

accept.php消费者代码

<?php  error_reporting(0);  include_once('RabbitMQCommand.php');  $configs = array('host'=>'127.0.0.1','port'=>5672,'username'=>'asdf','password'=>'123456','vhost'=>'/');  $exchange_name = 'class-e-1';  $queue_name = 'class-q-1';  $route_key = 'class-r-1';  $ra = new RabbitMQCommand($configs,$exchange_name,$queue_name,$route_key);  class A{      function processMessage($envelope, $queue) {          $msg = $envelope->getBody();          //自增id        $envelopeID = $envelope->getDeliveryTag();          $pid = posix_getpid();         //将取出来的内容放到文件里面         file_put_contents("log{$pid}.log", $msg.'|'.$envelopeID.''."\r\n",FILE_APPEND);          $queue->ack($envelopeID);      }  }  $a = new A();  $s = $ra->run(array($a,'processMessage'),false);

消息队列的实现中,RabbitMQ以其健壮和可靠见长.公司的项目中选择了它作为消息队列的实现.关于MQ的机制和原理网上有很多文章可以看,这里就不再赘述,只讲几个比较容易混淆的问题

1,binding key和routing key
　　binding key和routing key是都不过是自己设置的一组字符,只是用的地方不同,binding key是在绑定交换机和队列时候通过方法传递的字符串,routing key是在发布消息时候,顺便带上的字符串,有些人说这两个其实是一个东西,也对也不对,说对,是因为这两个可以完全一样,说不对,是因为这两个起的作用不同,一个交换机可以绑定很多队列,但是每个队列也许需要的消息类型不同,binding key就是这个绑定时候留在交换机和队列之间的提示信息,当消息发送出来后,随着消息一起发送的routing key如果和binding key一样就说明消息是这个队列要的东西,如果不一样那就不要给这个队列,交换机你找找下个队列看看要不要.明白了吧,这两个key就是暗号,对上了就是自己人,对不上那麻烦你再找找去.

2,持久化
　　交换机和队列都可以在创建时候设置为持久化,重启以后会回复,但是其中的消息未不会,如果要消息也恢复,将消息发布到交换机的时候，可以指定一个标志“Delivery Mode”（投递模式）,　　1为非持久化,2为持久化.
　　
3,流控机制
　　当消息生产的速度更快,而进程的处理能力低时,消息就会堆积起来,占用内存越来越多,导致MQ崩溃,所以rabbitmq有一个流控机制,当超过限定时候就会阻止接受消息,mq流控有三种机制
　　1,主动阻塞住发消息太快的连接,这个无法调整,如果被阻塞了,在abbitmqctl 控制台上会显示一个blocked的状态。
　　2,内存超过限量,会阻塞连接,在vm_memory_high_watermark可调
　　 3,剩余磁盘在限定以下mq会主动阻塞所有的生产者,默认为50m,在disk_free_limit可调.

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