Spring.Services命名空间的目的是为业务服务提供位置的透明性。我们相信使用普通的接口和.NET类,用户应该可以用最简单的方式实现服务。我们也认为在将某个服务发布给客户端的时,应该只关心服务的配置,而无需关心服务的实现。
在Spring.Services命名空间的支持下,可以用IoC容器中的服务导出对象将任一个普通对象发布为web服务、企业服务组件或远程对象。这里说的“普通对象”是指不继承或应用基础框架中任何特殊的基类(如MarshalByRefObject)或特性(如WebMethod)的对象。目前Spring.NET要求要发布的对象必须实现一个业务接口(按:即要发布的类必须实现某个接口,但这并非是限制,毕竟面向接口无论在什么时候都是好的编程实践)。Spring.NET的Remoting导出类会自动为其创建一个继承自MarshalByRefObject代理类。在服务端,可以将SAO类型注册为SingleCall或Singleton模式,也可以为每个对象配置生存期和租赁时间。另外,还可以将应用了AOP通知的对象发布为SAO。在客户端,可以用面向接口的最佳编程方式获取CAO的代理对象。Spring.NET还为Remoting创建了专门的schema来简化xml配置,不过我们仍然可以使用标准的schema来创建对象定义。
传统方式,在服务器需要使用RemotingConfiguration.Configure("xxx.exe.config")的方式启动服务,在客户端需要IContract contract = (IContract) Activator.GetObject ( typeof (IContract ), "tcp://localhost:1800/xxxx")的方式来注册服务。现在,一切都由Spring.NET而随之改变。
准备条件:
[Serializable]
public class Person
{
public string Name { get; set; }
public int Age { get; set; }
}
public interface IPersonContract
{
void SavePerson(Person model);
Person GetPerson();
}
PersonContract
public class PersonContract : IPersonContract
{
private Person m_person;
public void SavePerson(Person model)
{
this.m_person = model;
this.m_person.Name += "冬";
this.m_person.Age++;
}
public Person GetPerson()
{
return this.m_person;
}
}
一、部署为Singleton模式:
服务端
App.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<sectionGroup name="spring">
<section name="context" type="Spring.Context.Support.ContextHandler, Spring.Core" />
<section name="objects" type="Spring.Context.Support.DefaultSectionHandler, Spring.Core" />
<section name="parsers" type="Spring.Context.Support.NamespaceParsersSectionHandler, Spring.Core" />
</sectionGroup>
</configSections>
<spring>
<parsers>
<parser type="Spring.Remoting.Config.RemotingNamespaceParser, Spring.Services" />
</parsers>
<context>
<resource uri="config://spring/objects" />
</context>
<objects xmlns="http://www.springframework.net"
xmlns:r="http://www.springframework.net/remoting">
<object id="personContract" type="RemotingServer.PersonContract, RemotingServer"/>
<!--自动配置服务-->
<r:configurer filename="RemotingServer.exe.config" />
<!--目标对象名和服务名-->
<r:saoExporter targetName="personContract"
serviceName="PersonRemotingServer" />
</objects>
</spring>
<system.runtime.remoting>
<application>
<channels>
<channel ref="tcp" port="1800" />
</channels>
</application>
</system.runtime.remoting>
</configuration>
Program
class Program
{
static void Main(string[] args)
{
IApplicationContext ctx = ContextRegistry.GetContext();
Console.WriteLine("服务器已启动");
Console.ReadLine();
}
}
客户端
App.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<sectionGroup name="spring">
<section name="context" type="Spring.Context.Support.ContextHandler, Spring.Core" />
<section name="objects" type="Spring.Context.Support.DefaultSectionHandler, Spring.Core" />
</sectionGroup>
</configSections>
<spring>
<context>
<resource uri="config://spring/objects" />
</context>
<objects xmlns="http://www.springframework.net">
<object id="PersonRemotingServer" type="Spring.Remoting.SaoFactoryObject, Spring.Services">
<property name="ServiceInterface" value="IContract.IPersonContract, IContract" />
<property name="ServiceUrl" value="tcp://localhost:1800/PersonRemotingServer" />
</object>
</objects>
</spring>
</configuration>
Program
class Program
{
static void Main(string[] args)
{
IApplicationContext ctx = ContextRegistry.GetContext();
IPersonContract server = (IPersonContract)ctx.GetObject("PersonRemotingServer");
Person tempPerson = server.GetPerson();
tempPerson = tempPerson ?? new Person() { Name = "刘冬", Age = 26 };
server.SavePerson(tempPerson);
Person person = server.GetPerson();
string msg = string.Format("姓名:{0},年龄:{1}", person.Name, person.Age);
Console.WriteLine(msg);
Console.ReadLine();
}
}
运行效果:
第一次调用
第二次调用
二、部署为SingleCall模式:
修改对象的属性
<object id="personContract" type="RemotingServer.PersonContract, RemotingServer" singleton="false"/>
Program
class Program
{
static void Main(string[] args)
{
IApplicationContext ctx = ContextRegistry.GetContext();
IPersonContract server = (IPersonContract)ctx.GetObject("PersonRemotingServer");
Person tempPerson = server.GetPerson();
tempPerson = tempPerson ?? new Person() { Name = "刘冬", Age = 26 };
server.SavePerson(tempPerson);
Person person = server.GetPerson();
string msg = person == null ? "对象为空" : string.Format("姓名:{0},年龄:{1}", person.Name, person.Age);
Console.WriteLine(msg);
Console.ReadLine();
}
}
调用
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