public MarshalByValType MethodWithReturn()
{
Console.WriteLine("Executing in " + Thread.GetDomain().FriendlyName);
MarshalByValType t = new MarshalByValType();
return(t);
}
public MarshalByValType MethodWithReturn()
{
Console.WriteLine("Executing in " + Thread.GetDomain().FriendlyName);
MarshalByValType t = new MarshalByValType();
return t;
}
private static void Marshalling()
{
//获取当前线程在那个AppDomain，效果相同
var xad = Thread.GetDomain();
var xad2 = System.AppDomain.CurrentDomain;
// Get a reference to the AppDomain that that calling thread is executing in
AppDomain adCallingThreadDomain = Thread.GetDomain();
// Every AppDomain is assigned a friendly string name (helpful for debugging)
// Get this AppDomain's friendly string name and display it
String callingDomainName = adCallingThreadDomain.FriendlyName;
Console.WriteLine("Default AppDomain's friendly name={0}", callingDomainName);
// Get & display the assembly in our AppDomain that contains the 'Main' method
String exeAssembly = Assembly.GetEntryAssembly().FullName;
Console.WriteLine("Main assembly={0}", exeAssembly);
// Define a local variable that can refer to an AppDomain
AppDomain ad2 = null;
// *** DEMO 1: Cross-AppDomain Communication using Marshal-by-Reference
#region demo1
Console.WriteLine("{0}Demo #1", Environment.NewLine);
// Create new AppDomain (security & configuration match current AppDomain)
ad2 = AppDomain.CreateDomain("AD #2", null, null);
MarshalByRefType mbrt = null;
// Load our assembly into the new AppDomain, construct an object, marshal
// it back to our AD (we really get a reference to a proxy)
// 这一步导致线程切换到新的 AppDomain
mbrt = (MarshalByRefType)
ad2.CreateInstanceAndUnwrap(exeAssembly, "MarshalByRefType");
// 执行完后，线程切换回来
// The CLR lies about the type
// 1. 在内存中，mbrt的真正类型是一个「代理类型」，它有几个私有字段标明了「源AppDomain和 源对象」
// 2. mbrt的getType，做了特殊处理，返回「源对象」的类型
Console.WriteLine("Type={0}", mbrt.GetType());
// Prove that we got a reference to a proxy object
// IsTransparentProxy,通过这个方法，证明mbrt确实是「代理类型」
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbrt));
// This looks like we're calling a method on MarshalByRefType but, we're not.
// We're calling a method on the proxy type. The proxy transitions the thread「切换」
// to the AppDomain owning the object and calls this method on the real object.
mbrt.SomeMethod();
// Unload the new AppDomain
AppDomain.Unload(ad2);
// mbrt refers to a valid proxy object; the proxy object refers to an invalid AppDomain
try
{
// We're calling a method on the proxy type. The AD is invalid, exception is thrown
mbrt.SomeMethod();
Console.WriteLine("Successful call.");
}
catch (AppDomainUnloadedException)
{
Console.WriteLine("Failed call.");
}
#endregion
// *** DEMO 2: Cross-AppDomain Communication using Marshal-by-Value
#region demo2
Console.WriteLine("{0}Demo #2", Environment.NewLine);
// Create new AppDomain (security & configuration match current AppDomain)
ad2 = AppDomain.CreateDomain("AD #2", null, null);
// Load our assembly into the new AppDomain, construct an object, marshal
// it back to our AD (we really get a reference to a proxy)
mbrt = (MarshalByRefType)
ad2.CreateInstanceAndUnwrap(exeAssembly, "MarshalByRefType");
// The object's method returns a COPY of the returned object;
// the object is marshaled by value (not be reference).
MarshalByValType mbvt = mbrt.MethodWithReturn();
// Prove that we did NOT get a reference to a proxy object
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbvt));
// This looks like we're calling a method on MarshalByValType and we are.
Console.WriteLine("Returned object created " + mbvt.ToString());
// Unload the new AppDomain
AppDomain.Unload(ad2);
// mbvt refers to valid object; unloading the AppDomain has no impact.
try
{
// We're calling a method on an object; no exception is thrown
Console.WriteLine("Returned object created " + mbvt.ToString());
Console.WriteLine("Successful call.");
}
catch (AppDomainUnloadedException)
{
Console.WriteLine("Failed call.");
}
#endregion
// DEMO 3: Cross-AppDomain Communication using non-marshalable type
#region demo3
Console.WriteLine("{0}Demo #3", Environment.NewLine);
// Create new AppDomain (security & configuration match current AppDomain)
ad2 = AppDomain.CreateDomain("AD #2", null, null);
// Load our assembly into the new AppDomain, construct an object, marshal
// it back to our AD (we really get a reference to a proxy)
mbrt = (MarshalByRefType)
ad2.CreateInstanceAndUnwrap(exeAssembly, "MarshalByRefType");
// The object's method returns an non-marshalable object; exception
try
{
NonMarshalableType nmt = mbrt.MethodArgAndReturn(callingDomainName);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
// We won't get here...
#endregion
}
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;
// *** DEMO 1:使用Marshal-by-Reference进行跨APPDomain通信 ***
Console.WriteLine("{0}Demo #1", Environment.NewLine);
// 新建一个AppDomain(从当前AppDomain继承安全性和配置)
ad2 = AppDomain.CreateDomain("AD #2", null, null);
MarshalByRefType mbrt = null;
// 将我们的程序集加载到新AppDomain中，构造一个对象，把它
// 封送回我们的AppDomain（实际得到对一个代理的引用）
mbrt = (MarshalByRefType)
ad2.CreateInstanceAndUnwrap(exeAssembly, "MarshalByRefType");
// CLR 在类型上撒谎了
Console.WriteLine("Type={0}", mbrt.GetType());
// 证明得到的是对一个代理对象的引用
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbrt));
// 看起来像是在MarshalByRefType上调用一个方法，实则不然
// 我们是在代理类型上调用一个方法，代理使线程切换到拥有对象的
// 那个AppDomain，并在真实的对象上调用这个方法
mbrt.SomeMethod();
// 卸载新的AppDomain
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
{
// 在代理类型上调用一个方法，AppDomain无效，造成抛出异常
mbrt.SomeMethod();
Console.WriteLine("Successful call.");
}
catch (AppDomainUnloadedException)
{
Console.WriteLine("Failed call.");
}
// *** DEMO 2:使用Marshal-by-Value进行跨AppDomain通信 ***
Console.WriteLine("{0}Demo #2", Environment.NewLine);
// 新建一个AppDomain（从当前AppDomain继承安全性和配置）
ad2 = AppDomain.CreateDomain("AD #2", null, null);
// 将我们的程序集加载到新AppDomain中，构造一个对象，把它
// 封送回我们的AppDomain（实际得到对一个代理的引用）
mbrt = (MarshalByRefType)
ad2.CreateInstanceAndUnwrap(exeAssembly, "MarshalByRefType");
// 对象的方法返回所返回对象的副本；
// 对象按值（而非按引用）封送
MarshalByValType mbvt = mbrt.MethodWithReturn();
// 证明得到的不是对一个代理对象的引用
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbvt));
// 看起来是在MarshalByValType上调用一个方法，实际也是如此
Console.WriteLine("Returned object created " + mbvt.ToString());
// 卸载新的AppDomain
AppDomain.Unload(ad2);
// mbvt引用有效的对象：卸载AppDomain没有影响
try
{
// 我们是在对象上调用一个方法：不会抛出异常
Console.WriteLine("Returned object created " + mbvt.ToString());
Console.WriteLine("Successful call.");
}
catch (AppDomainUnloadedException)
{
Console.WriteLine("Failed call.");
}
// DEMO 3: 使用不可封送的类型进行跨AppDomain通信 ***
Console.WriteLine("{0}Demo #3", Environment.NewLine);
// 新建一个AppDomain（从当前AppDomain继承安全性和配置）
ad2 = AppDomain.CreateDomain("AD #2", null, null);
// 将我们的程序集加载到新AppDomain中，构造一个对象，把它
// 封送回我们的AppDomain（实际得到对一个代理的引用）
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);
// 这里永远执行不到...
}
public static void RunAndExplore()
{
// Get a reference to the AppDomain that the calling thread is executing in
AppDomain adCallingThreadDomain = Thread.GetDomain();
// Every AppDomain is assigned a friendly string name (helpful for debugging)
// Get this AppDomain's friendly string name and display it
String callingDomainName = adCallingThreadDomain.FriendlyName;
Console.WriteLine("Default AppDomain's friendly name={0}", callingDomainName);
// Get and display the assembly in our AppDomain that contains the 'Main' method
String exeAssembly = Assembly.GetEntryAssembly().FullName;
Console.WriteLine("Main assembly={0}", exeAssembly);
// Define a local variable that can refer to an AppDomain
AppDomain ad2 = null;
#region *** DEMO 1: CrossAppDomain Communication Using MarshalbyReference ***
Console.WriteLine("{0}Demo #1", Environment.NewLine);
// Create new AppDomain (security and configuration match current AppDomain)
ad2 = AppDomain.CreateDomain("AD #2", null, null);
MarshalByRefType mbrt = null;
// Load our assembly into the new AppDomain, construct an object, marshal
// it back to our AD (we really get a reference to a proxy)
mbrt = (MarshalByRefType)
ad2.CreateInstanceAndUnwrap(exeAssembly, typeof(MarshalByRefType).FullName);
Console.WriteLine("Type={0}", mbrt.GetType()); // The CLR lies about the type
// Prove that we got a reference to a proxy object
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbrt));
Console.WriteLine("Try call SomeMethod()");
// This looks like we're calling a method on MarshalByRefType but we're not.
// We're calling a method on the proxy type. The proxy transitions the thread
// to the AppDomain owning the object and calls this method on the real object.
mbrt.SomeMethod();
Console.WriteLine("Successful call.");
Console.WriteLine("Unload the {0}", ad2.FriendlyName);
// Unload the new AppDomain
AppDomain.Unload(ad2);
// mbrt refers to a valid proxy object; the proxy object refers to an invalid AppDomain
try
{
Console.WriteLine("Try call SomeMethod()");
// We're calling a method on the proxy type. The AD is invalid, exception is thrown
mbrt.SomeMethod();
Console.WriteLine("Successful call.");
}
catch (AppDomainUnloadedException e)
{
Console.WriteLine("Failed call - {0}", e.GetType());
}
#endregion
#region *** DEMO 2: CrossAppDomain Communication Using MarshalbyValue ***
Console.WriteLine("{0}Demo #2", Environment.NewLine);
// Create new AppDomain (security and configuration match current AppDomain)
ad2 = AppDomain.CreateDomain("AD #2", null, null);
// Load our assembly into the new AppDomain, construct an object, marshal
// it back to our AD (we really get a reference to a proxy)
mbrt = (MarshalByRefType)
ad2.CreateInstanceAndUnwrap(exeAssembly, typeof(MarshalByRefType).FullName);
// The object's method returns a COPY of the returned object;
// the object is marshaled by value (not by reference).
MarshalByValType mbvt = mbrt.MethodWithReturn();
// Prove that we did NOT get a reference to a proxy object
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbvt));
// This looks like we're calling a method on MarshalByValType and we are.
Console.WriteLine("Returned object created, try call ToString() call \r\n" + mbvt.ToString());
Console.WriteLine("Successful call.");
Console.WriteLine("Unload the {0}", ad2.FriendlyName);
// Unload the new AppDomain
AppDomain.Unload(ad2);
// mbvt refers to valid object; unloading the AppDomain has no impact.
try
{
// We're calling a method on an object; no exception is thrown
Console.WriteLine("Returned object created try call ToString() call \r\n" + mbvt.ToString());
Console.WriteLine("Successful call.");
}
catch (AppDomainUnloadedException e)
{
Console.WriteLine("Failed call - {0}", e.GetType());
}
#endregion
#region *** DEMO 3: CrossAppDomain Communication Using nonmarshalable type ***
Console.WriteLine("{0}Demo #3", Environment.NewLine);
// Create new AppDomain (security and configuration match current AppDomain)
ad2 = AppDomain.CreateDomain("AD #2", null, null);
// Load our assembly into the new AppDomain, construct an object, marshal
// it back to our AD (we really get a reference to a proxy)
mbrt = (MarshalByRefType)
ad2.CreateInstanceAndUnwrap(exeAssembly, typeof(MarshalByRefType).FullName);
try
{
// The object's method returns a nonmarshalable object;
NonMarshalableType nmt = mbrt.MethodArgAndReturn(callingDomainName); // exception
Console.WriteLine("Successful call."); // We won't get here...
}
catch (SerializationException e)
{
Console.WriteLine("Failed call - {0}", e.GetType());
}
Console.ReadKey();
#endregion
}
public static void MainAppdomainAndHost()
{
Console.WriteLine(Guid.NewGuid());
//Clr via 528页
//获取对Appdomain的一个引用
AppDomain adCallThreadDomain = Thread.GetDomain();
String callingDomainName = adCallThreadDomain.FriendlyName;
Console.WriteLine("Default AppDomain's friendly name={0}", callingDomainName);
String exeAssembly = Assembly.GetEntryAssembly().FullName;
Console.WriteLine("Main assembly={0}", callingDomainName);
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, "MarshalByRefType");
//CLR在类型上撒谎
Console.WriteLine("Type={0}", mbrt.GetType());
//证明得到的是一个代理对象的引用
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbrt));
mbrt.SomeMethod();
AppDomain.Unload(ad2);
try
{
mbrt.SomeMethod();
Console.WriteLine("Successful call.");
}
catch (Exception)
{
Console.WriteLine("Failed call.");
}
Console.WriteLine("{0} Demo #2", Environment.NewLine);
ad2 = AppDomain.CreateDomain("Ad #2", null, null);
mbrt = (MarshalByRefType)ad2.CreateInstanceAndUnwrap(exeAssembly, "MarshalByRefType");
MarshalByValType mbvt = mbrt.MethodWithReturn();
Console.WriteLine("Is proxy={0}", RemotingServices.IsTransparentProxy(mbvt));
Console.WriteLine("Returned object created {0}", mbvt);
AppDomain.Unload(ad2);
try
{
Console.WriteLine("Returned object created {0}", mbvt);
Console.WriteLine("Successful call.");
}
catch (Exception)
{
Console.WriteLine("Failed call.");
}
Console.WriteLine("{0} Demo #3", Environment.NewLine);
ad2 = AppDomain.CreateDomain("Ad #2", null, null);
mbrt = (MarshalByRefType)ad2.CreateInstanceAndUnwrap(exeAssembly, "MarshalByRefType");
NonMarshalableType nmt = mbrt.MethodArgAndReturn(callingDomainName);
Console.WriteLine("Continue.......");
Console.Read();
}
