SuperSocket 1.4系列文档(14) 多服务器实例和服务器实例之间的交互

SuperSocket支持在同一程序中运行多个服务器实例监听在不同的IP或端口，只需在配置文件中添加两个server节点即可:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <section name="socketServer" type="SuperSocket.SocketEngine.Configuration.SocketServiceConfig, SuperSocket.SocketEngine"/>
    </configSections>
    <appSettings>
        <add key="ServiceName" value="SuperSocket"/>
    </appSettings>
    <socketServer>
        <servers>
            <server name="ServerA"
                    serviceName="MyAppServerA"
                    ip="Any" port="911" mode="Async">
            </server>
            <server name="ServerB"
                    serviceName="MyAppServerB"
                    ip="Any" port="912" mode="Async">
            </server>
        </servers>
        <services>
            <service name="MyAppServerA"
                     type="SuperSocket.QuickStart.MultipleAppServer.MyAppServerA, SuperSocket.QuickStart.MultipleAppServer" />
            <service name="MyAppServerB"
                     type="SuperSocket.QuickStart.MultipleAppServer.MyAppServerB, SuperSocket.QuickStart.MultipleAppServer" />
        </services>
    </socketServer>
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0" />
    </startup>
</configuration>

在某些情况下，需要两个服务器实例之间进行交互。例如ServerA上的客户端C1向ServerB上的客户端C2转发消息，这样就需要ServerA接收到C1的命令之后通过ServerB将消息转发给客户端C2。

在MyAppServerA的OnStartup方法里面可利用SocketServerManager的GetServerByName(string name)方法通过服务器实例的名称来获取服务器实例：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using SuperSocket.SocketBase;
using SuperSocket.SocketEngine;

namespace SuperSocket.QuickStart.MultipleAppServer
{
    public class MyAppServerA : AppServer
    {
        private IDespatchServer m_DespatchServer;

        protected override void OnStartup()
        {
            m_DespatchServer = SocketServerManager.GetServerByName("ServerB") as IDespatchServer;
            base.OnStartup();
        }

        internal void DespatchMessage(string targetSessionKey, string message)
        {
            m_DespatchServer.DispatchMessage(targetSessionKey, message);
        }
    }

    interface IDespatchServer
    {
        void DispatchMessage(string sessionKey, string message);
    }

    public class MyAppServerB : AppServer, IDespatchServer
    {
        public void DispatchMessage(string sessionKey, string message)
        {
            var session = GetAppSessionByIndentityKey(sessionKey);
            if (session == null)
                return;

            session.SendResponse(message);
        }
    }
}

这样就可以在MyAppServerA中通过调用MyAppServerB实例的方法来向ServerB的客户端发送消息了。

示例代码请参考SuperSocket源代码QuickStart中的MultipleAppServer项目。