//
// System.Runtime.Remoting.ActivationServices.cs
//
// Author: Lluis Sanchez Gual (lluis@ideary.com)
//
// (C) 2002, Lluis Sanchez Gual
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Threading;
using System.Runtime.Remoting.Messaging;
using System.Runtime.Remoting.Activation;
using System.Runtime.Remoting.Contexts;
using System.Runtime.Remoting.Proxies;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Collections;
using System.Runtime.Remoting.Channels;
namespace System.Runtime.Remoting.Activation{
internal class ActivationServices
{
static IActivator _constructionActivator;
static IActivator ConstructionActivator {
get {
if (_constructionActivator == null)
_constructionActivator = new ConstructionLevelActivator ();
return _constructionActivator;
}
}
public static IMessage Activate (RemotingProxy proxy, ConstructionCall ctorCall)
{
IMessage response;
ctorCall.SourceProxy = proxy;
if (Thread.CurrentContext.HasExitSinks && !ctorCall.IsContextOk)
response = Thread.CurrentContext.GetClientContextSinkChain ().SyncProcessMessage (ctorCall);
else
response = RemoteActivate (ctorCall);
if (response is IConstructionReturnMessage && ((IConstructionReturnMessage)response).Exception == null && proxy.ObjectIdentity == null)
{
Identity identity = RemotingServices.GetMessageTargetIdentity (ctorCall);
proxy.AttachIdentity (identity);
}
return response;
}
public static IMessage RemoteActivate (IConstructionCallMessage ctorCall)
{
try
{
return ctorCall.Activator.Activate (ctorCall);
}
catch (Exception ex)
{
return new ReturnMessage (ex, ctorCall);
}
}
public static object CreateProxyFromAttributes (Type type, object[] activationAttributes)
{
string activationUrl = null;
foreach (object attr in activationAttributes)
{
if (!(attr is IContextAttribute)) throw new RemotingException ("Activation attribute does not implement the IContextAttribute interface");
if (attr is UrlAttribute) activationUrl = ((UrlAttribute)attr).UrlValue;
}
if (activationUrl != null)
return RemotingServices.CreateClientProxy (type, activationUrl, activationAttributes);
ActivatedClientTypeEntry activatedEntry = RemotingConfiguration.IsRemotelyActivatedClientType (type);
if (activatedEntry != null)
return RemotingServices.CreateClientProxy (activatedEntry, activationAttributes);
if (type.IsContextful)
return RemotingServices.CreateClientProxyForContextBound (type, activationAttributes);
return null;
}
public static ConstructionCall CreateConstructionCall (Type type, string activationUrl, object[] activationAttributes)
{
ConstructionCall ctorCall = new ConstructionCall (type);
if (!type.IsContextful)
{
// Must be a remote activated object
ctorCall.Activator = new AppDomainLevelActivator (activationUrl, ConstructionActivator);
ctorCall.IsContextOk = false; // It'll be activated in a remote context
return ctorCall;
}
// It is a CBO. Need collect context properties and
// check if a new context is needed.
IActivator activatorChain = ConstructionActivator;
activatorChain = new ContextLevelActivator (activatorChain);
ArrayList attributes = new ArrayList ();
if (activationAttributes != null) attributes.AddRange (activationAttributes);
bool isContextOk = (activationUrl == ChannelServices.CrossContextUrl); // Remote CBOs are always created in a new context
Context currentContext = Threading.Thread.CurrentContext;
if (isContextOk)
{
foreach (IContextAttribute attr in attributes)
{
if (!attr.IsContextOK (currentContext, ctorCall))
{
isContextOk = false;
break;
}
}
}
object[] typeAttributes = type.GetCustomAttributes (true);
foreach (object attr in typeAttributes)
{
if (attr is IContextAttribute)
{
isContextOk = isContextOk && ((IContextAttribute)attr).IsContextOK (currentContext, ctorCall);
attributes.Add (attr);
}
}
if (!isContextOk)
{
// A new context is needed. Collect the context properties and chain
// the context level activator.
ctorCall.SetActivationAttributes (attributes.ToArray());
foreach (IContextAttribute attr in attributes)
attr.GetPropertiesForNewContext (ctorCall);
}
if (activationUrl != ChannelServices.CrossContextUrl)
activatorChain = new AppDomainLevelActivator (activationUrl, activatorChain);
ctorCall.Activator = activatorChain;
ctorCall.IsContextOk = isContextOk;
return ctorCall;
}
public static IMessage CreateInstanceFromMessage (IConstructionCallMessage ctorCall)
{
object obj = AllocateUninitializedClassInstance (ctorCall.ActivationType);
ServerIdentity identity = (ServerIdentity) RemotingServices.GetMessageTargetIdentity (ctorCall);
identity.AttachServerObject ((MarshalByRefObject) obj, Threading.Thread.CurrentContext);
ConstructionCall call = ctorCall as ConstructionCall;
if (ctorCall.ActivationType.IsContextful && call != null && call.SourceProxy != null)
{
call.SourceProxy.AttachIdentity (identity);
MarshalByRefObject target = (MarshalByRefObject) call.SourceProxy.GetTransparentProxy ();
RemotingServices.InternalExecuteMessage (target, ctorCall);
}
else
ctorCall.MethodBase.Invoke (obj, ctorCall.Args);
return new ConstructionResponse (obj, null, ctorCall);
}
public static object CreateProxyForType (Type type)
{
// Called by the runtime when creating an instance of a type
// that has been registered as remotely activated.
// First of all check for remote activation. If the object is not remote, then
// it may be contextbound.
ActivatedClientTypeEntry activatedEntry = RemotingConfiguration.IsRemotelyActivatedClientType (type);
if (activatedEntry != null)
return RemotingServices.CreateClientProxy (activatedEntry, null);
WellKnownClientTypeEntry wellknownEntry = RemotingConfiguration.IsWellKnownClientType (type);
if (wellknownEntry != null)
return RemotingServices.CreateClientProxy (wellknownEntry);
if (type.IsContextful)
return RemotingServices.CreateClientProxyForContextBound (type, null);
#if !NET_2_1
if (type.IsCOMObject) {
return RemotingServices.CreateClientProxyForComInterop (type);
}
#endif
return null;
}
// Allocates an uninitialized instance. It never creates proxies.
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public static extern object AllocateUninitializedClassInstance (Type type);
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public extern static void EnableProxyActivation (Type type, bool enable);
}
}
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