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使用Hessian协议调用远程方法.
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探讨Hessian在PHP中的使用分析

Jun 06, 2016 pm 08:31 PM
php

本篇文章是对Hessian在PHP中的使用进行了详细的分析介绍, 需要的朋友参考下

什么是Hessian
  Hessian是由caucho提供的一种开源的远程通讯协议。
  采用二进制 RPC 协议,美国服务器,基于 HTTP 传输,服务器端不用另开放防火墙端口。
  协议的规范是公开的,可以用于任意语言。
  采用客户机/服务器模式。
  请求程序就是一个客户机,网站空间,而服务提供程序就是一个服务器。
  客户机调用进程发送一个有进程参数的调用信息到服务进程,然后等待应答信息。
  在服务器端,进程保持睡眠状态直到调用信息的到达为止。
  当一个调用信息到达,服务器获得进程参数,计算结果,发送答复信息,然后等待下一个调用信息,最后,客户端调用进程接收答复信息,
  获得进程结果,然后调用执行继续进行。

Hessian协议工作流程图
  客户端程序请求服务端函数 
  1.调用客户端句柄,执行传送参数。
  2.调用本地系统内核发送网络消息。
  3.消息传送到远程主机。
  4.服务器句柄得到消息并取得参数。
  5.执行远程过程。



服务端函数返回结果给客户端
  1.执行的过程将结果返回服务器句柄。
  2.服务器句柄返回结果,香港空间,调用远程系统内核。
  3.消息传回本地主机。
  4.客户句柄由内核接收消息。
  5.客户接收句柄返回的数据。

附带源码解释

1.引用配置文件,包括网站根目录,以及Hessian的地址。

复制代码 代码如下:


/**
* 文件名 : config.php
* 用途 : Hessian配置文件
*
* @package system.core.code applied to the whole site
* @copyright Copyright (c) 2012
* @since 1.0
*/

// 根目录
define( 'PATH' , dirname(__FILE__) . DIRECTORY_SEPARATOR );

// Hessian Url地址
define( 'HESSIAN_URL' , 'http://qx.com/server.php' );

// IDE : Zend Studio 9.0
// IDE Extension : Toggle Vrapper
?>


2.配置服务端。

复制代码 代码如下:


/**
* 文件名 : server.php
*
* 参考资料 :
* 1. ( Hessian主页 )
* 2. ( Hessian PHP )
* 3. ( Hessian PHP开源 )
* 4. ( 单例模式 )
*
* @author wubaiqing
* @package system.core applied to the whole site
* @copyright Copyright (c) 2012
* @since 1.0
*/
require_once ( dirname(__FILE__) . DIRECTORY_SEPARATOR . 'config.php' );
require_once ( PATH . 'extensions/HessianPHP/HessianService.php' );

class HessianServer
{
public function __construct() {}
/**
* 商品详细信息APi接口
* @param string $title 标题
* @param int $price 价格
*/
public function goodsInfomationApi( $title , $price ) {
$price = (int) $price;
return '

使用Hessian协议调用远程方法.

标题:' . $title . '
价格:'.$price;
}
}

$server = new HessianService( new HessianServer() );
//$server->displayInfo();
$server->handle();

// IDE : Zend Studio 9.0
// IDE Extension : Toggle Vrapper
?>


3.可以通过HessianService类中的displayInfo方法去查看开启多少个通讯方法。
如果搭建服务端要使用handle方法,如出现Hessian Requires POST提示,服务端就已经搭建成功。

4.封装Hessian接口

复制代码 代码如下:


/**
* 类名 : HessianApi
*
* 参考资料 :
* 1. ( Hessian主页 )
* 2. ( Hessian PHP )
* 3. ( Hessian PHP开源 )
* 4. ( 单例模式 )
*
* @author wubaiqing
* @package system.core applied to the whole site
* @copyright Copyright (c) 2012
* @since 1.0
*/
class HessianApi
{
/**
* @var string 接口地址
*/
private $_url = NULL;

/**
* @var result 句柄
*/
private $_handle = NULL;

/**
* @var array 存放单例模式数组
*/
private static $_objects = array();

/**
* 设置URL地址
* 实例化HessianClient类
* 参数 : (1) url地址 , 2
*
* 2.Java调用字段
* @param string $url
*/
public function __construct( $url )
{
$this->setUrl( $url );
$handler = new HessianClient ( $this->getUrl (), $this->getOptions () );
$this->setHandler ( $handler );
}

/**
* @return result $_handle 句柄
*/
public function getHandler() {
return $this->_handle;
}

/**
* 设置句柄
* @param result $_handle
*/
public function setHandler($_handle) {
$this->_handle = $_handle;
}

/**
* 获取URL地址
*/
public function getUrl() {
return $this->_url;
}

/**
* 设置URL地址
* @param string $url
*/
public function setUrl($url) {
$this->_url = $url;
}

/**
* typeMap映射Java等平台对象
* @return array
*/
public function getOptions() {
return array (
      'version' => 1,
      'saveRaw' => TRUE,
      'typeMap' => array(
        'JavaNullPointException' => 'java.lang.NullPointerException' ,
        'StackTraceElement' => 'java.lang.StackTraceElement')
     );
}

/**
* 记录接口调用信息
* @param string $method 调用的方法
* @param string $returnMsg 需要记入log的文字信息
*/
public function resultLog( $method , $returnMsg )
{
$logPath = PATH.'/runtime/hessian/';
if( !is_dir( $logPath ) ) {
mkdir($logPath,0777);
}
error_log(date('Ymd H:i:s', time()) . '|' . $method . '|' . $returnMsg."\n", 3, $logPath . date('Y-m-d', time()) . '.log');
}

/**
* 静态工厂方法,生成单个URL的唯一实例
* @param string $url
*/
public static function start( $url )
{
$key = md5( $url );

if ( isset(self::$_objects[$key]) ) {
return self::$_objects[$key];
}

self::$_objects[$key] = new HessianApi( $url );
return self::$_objects[$key];
}
}

class JavaNullPointException extends Exception {}

class StackTraceElement extends Exception {}

// IDE : Zend Studio 9.0
// IDE Extension : Toggle Vrapper

?>


5.封装客户端请求方法,继承HessianApi类

复制代码 代码如下:

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