Remoting 之旅

昨晚买了本分布式程序设计，对Remoting比较关注。今天 忙了一整天，在调试Remoting ，搞的头昏脑涨.
现在把一些注意点列出来：

1。允许Remoting 访问的组件必须继承于 MarshalByRefObject类
如果客户端是基于接口的话，还必须定义相应的接口并实现（这里是ICustomer)
 public class Customer :MarshalByRefObject ,IRemotingBLL.ICustomer
2。服务端配置文件

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.runtime.remoting>
    <application>

      <service>
        <wellknown mode="SingleCall"
                   type="RemotingBLL.Customer, RemotingBLL"
                   objectUri="Customer" />
        
       <wellknown mode="SingleCall"
                  type="RemotingBLL.Order, RemotingBLL" 
                  objectUri="Order" />
                 
      </service>
      <channels>
        <channel ref="Tcp Server"  port="6791" />
        <!--<channel type="System.Runtime.Remoting.Channels.Tcp.TcpServerChannel,System.Runtime.Remoting.Channels.Tcp" port="6791"></channel>-->
      </channels>
    </application>
  </system.runtime.remoting>
</configuration>

其中<channel ref="Tcp Server"... 可以是<channel ref="http" ... 这样采用的是Http适合Internet,
通过以下语句启动服务端

     private void frmServer_Load(object sender, EventArgs e)
        ...{
            RemotingConfiguration.Configure("BLLServer.exe.config", false); //false 为不需要安全保证
       }

客源户段的配置文件：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.runtime.remoting>
    <application>
      <client>
        <wellknown type="IRemotingBLL.ICustomer, IRemotingBLL" 
                   url="tcp://localhost:6791/Customer" />
       
        <wellknown type="IRemotingBLL.IOrder, IRemotingBLL" 
           url="tcp://localhost:6791/Order" />
          
      </client>
      <channels>
        <channel ref="Tcp Client">
          <clientProviders>
            <formatter ref="binary"/>
          </clientProviders>
        </channel>
      </channels>

    </application>
  </system.runtime.remoting>
</configuration>

客户段的激活代码是
RemotingConfiguration.Configure("RemotingClient.exe.config",false);
简单的测试代码如下：
其中的Activator.GetObject（。。。方法的第一个参数为type 可以是接口（如果提供接口）或类
第2个为string 类型的 url 可以通过RemotingConfiguration.GetRegisteredWellKnownClientTypes()[i].ObjectUrl
获得

 

        private void button1_Click(object sender, EventArgs e)
        ...{

            IRemotingBLL.ICustomer customer = (IRemotingBLL.ICustomer)Activator.GetObject(typeof(IRemotingBLL.ICustomer), RemotingConfiguration.GetRegisteredWellKnownClientTypes()[0].ObjectUrl);
            IRemotingBLL.IOrder order = (IRemotingBLL.IOrder)Activator.GetObject(typeof(IRemotingBLL.IOrder), RemotingConfiguration.GetRegisteredWellKnownClientTypes()[1].ObjectUrl);
            MessageBox.Show(customer.GetCustomer("Hello Server!") );
            MessageBox.Show(order.GetOrder(58));
        }