public NonMarshalableType MethodArgAndReturn(string callingDomainName)
{
Console.WriteLine("Calling from '{0}' to '{1}'.", callingDomainName, Thread.GetDomain().FriendlyName);
NonMarshalableType t = new NonMarshalableType();
return(t);
}
private static void Marshalling()
{
AppDomain adCallingThreadDomain = Thread.GetDomain();
string callingDomainName = adCallingThreadDomain.FriendlyName;
Console.WriteLine("Default AppDomain's friendly name={0}", callingDomainName);
string exeAssembly = Assembly.GetEntryAssembly().FullName;
Console.WriteLine("Main assembly={0}", exeAssembly);
AppDomain ad2 = null;
Console.WriteLine("{0}Demo #1", Environment.NewLine);
ad2 = AppDomain.CreateDomain("AD #2", null, null);
MarshalByRefType mbrt = null;
mbrt = (MarshalByRefType)ad2.CreateInstanceAndUnwrap(exeAssembly, "Chapter22.MarshalByRefType");
Console.WriteLine("Type={0}", mbrt.GetType().ToString());
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbrt));
mbrt.SomeMethod();
AppDomain.Unload(ad2);
try
{
mbrt.SomeMethod();
Console.WriteLine("Successful call.");
}
catch (AppDomainUnloadedException)
{
Console.WriteLine("Failed call.");
}
Console.WriteLine("{0}Deomo #2", Environment.NewLine);
ad2 = AppDomain.CreateDomain("AD #2", null, null);
mbrt = (MarshalByRefType)ad2.CreateInstanceAndUnwrap(exeAssembly, "Chapter22.MarshalByRefType");
MarshalByValType mbvt = mbrt.MethodWithReturn();
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbvt));
Console.WriteLine("Returned object created " + mbvt.ToString());
AppDomain.Unload(ad2);
try
{
Console.WriteLine("Returned object created " + mbvt.ToString());
}
catch (AppDomainUnloadedException)
{
Console.WriteLine("Failed call");
}
Console.WriteLine("{0}Demo #3", Environment.NewLine);
ad2 = AppDomain.CreateDomain("AD #2", null, null);
mbrt = (MarshalByRefType)ad2.CreateInstanceAndUnwrap(exeAssembly, "Chapter22.MarshalByRefType");
NonMarshalableType nmt = mbrt.MethodArgAndReturn(callingDomainName);
Console.WriteLine("返回不可封送对象");
}
//AppDomain没有在.NET Core当中实现，需要使用.NET Framework
private static void Marshalling()
{
//获取AppDomain引用
AppDomain adCallingThreadDomain = Thread.GetDomain();
//每个AppDomain都分配了字符串名称
string callingDomainName = adCallingThreadDomain.FriendlyName;
Console.WriteLine("Defaul AppDomain friendly name = {0}", callingDomainName);
//获取包含了Main的方法集
string exeAssembly = Assembly.GetEntryAssembly().FullName;
Console.WriteLine("Main assembly={0}", exeAssembly);
AppDomain ad2 = null;
//使用Marshal-by-Reference进行通信
Console.WriteLine("{0} Demo #1", Environment.NewLine);
//新建一个AppDomain，从当前的继承安全性和配置
ad2 = AppDomain.CreateDomain("AD #2", null, null);
MarshalByRefType mbrt = null;
//将程序集加载到新的AppDomain当中，构造一个对象，把他封装会原来的AppDomain（实际会得到到一个代理引用）
mbrt = (MarshalByRefType)ad2.CreateInstanceAndUnwrap(exeAssembly, "MarshalByRefType");
Console.WriteLine("Type={0}", mbrt.GetType()); //CLR在类型上撒谎了
//证明得到的是一个代理对象的引用
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbrt));
//看起来像是再MarshalByRefType上调用方法
//实际是在代理类型上调用方法
mbrt.SomeMethod();
//卸载
AppDomain.Unload(ad2);
//mbrt引用一个有效的代理对象，代理对象引用一个无效的AppDomain
try
{
mbrt.SomeMethod();
Console.WriteLine("Successful calling");
}
catch (AppDomainUnloadedException)
{
Console.WriteLine("Failed call");
}
//DEMO2: 使用Marshal-by-value进行跨AppDomain通信
Console.WriteLine("{0} Demo #2", Environment.NewLine);
ad2 = AppDomain.CreateDomain("AD #2", null, null);
mbrt = (MarshalByRefType)ad2.CreateInstanceAndUnwrap(exeAssembly, "MarshalByRefType");
//对象的方法返回对象的副本，按值封送
MarshalByValType mbvt = mbrt.MethodWithReturn();
//证明得到的不是一个代理对象的引用
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbrt));
Console.WriteLine("Returned object created ", mbvt.ToString());
//卸载
AppDomain.Unload(ad2);
//mbvt是值，卸载AppDomain没有影响
try
{
mbrt.SomeMethod();
Console.WriteLine("Successful calling");
}
catch (AppDomainUnloadedException)
{
Console.WriteLine("Failed call");
}
//Demo 3: 使用不可封送的类型跨AppDomain通信
ad2 = AppDomain.CreateDomain("AD #2", null, null);
mbrt = (MarshalByRefType)ad2.CreateInstanceAndUnwrap(exeAssembly, "MarshalByRefType");
//对象的方法返回一个不可封送的对象，抛出异常
NonMarshalableType nmt = mbrt.MethodArgAndReturn(callingDomainName);
}