//
// Authors:
// Dietmar Maurer (dietmar@ximian.com)
+// Lluis Sanchez Gual (lluis@ideary.com)
+// Patrik Torstensson
//
// (C) 2001 Ximian, Inc. http://www.ximian.com
//
using System;
+using System.Text;
using System.Reflection;
using System.Threading;
using System.Collections;
using System.Runtime.Remoting.Messaging;
using System.Runtime.Remoting.Proxies;
using System.Runtime.Remoting.Channels;
+using System.Runtime.Remoting.Contexts;
+using System.Runtime.Remoting.Activation;
+using System.Runtime.Remoting.Lifetime;
using System.Runtime.CompilerServices;
using System.Runtime.Serialization;
+using System.IO;
namespace System.Runtime.Remoting
{
- public sealed class RemotingServices {
+ public sealed class RemotingServices
+ {
+ // Holds the identities of the objects, using uri as index
+ static Hashtable uri_hash = new Hashtable ();
internal static string app_id;
+ static int next_id = 1;
static RemotingServices ()
{
- app_id = "/" + Guid.NewGuid().ToString().Replace('-', '_') + "/";
-
+ RegisterInternalChannels ();
+ app_id = "/" + Guid.NewGuid().ToString().Replace('-', '_') + "/";
+ CreateWellKnownServerIdentity (typeof(RemoteActivator), "RemoteActivationService.rem", WellKnownObjectMode.Singleton);
}
-
- static int next_id = 1;
-
+
private RemotingServices () {}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public extern static bool IsTransparentProxy (object proxy);
- public static IMethodReturnMessage ExecuteMessage (
+ internal static IMethodReturnMessage InternalExecuteMessage (
MarshalByRefObject target, IMethodCallMessage reqMsg)
{
ReturnMessage result;
- MonoMethod method = (MonoMethod)reqMsg.MethodBase;
-
- try {
+ MonoMethod method = (MonoMethod) target.GetType().GetMethod(reqMsg.MethodName, BindingFlags.Public|BindingFlags.NonPublic|BindingFlags.Instance, null, (Type[]) reqMsg.MethodSignature, null);
+ object oldContext = CallContext.SetCurrentCallContext (reqMsg.LogicalCallContext);
+
+ try
+ {
object [] out_args;
object rval = InternalExecute (method, target, reqMsg.Args, out out_args);
- result = new ReturnMessage (rval, out_args, out_args.Length,
- reqMsg.LogicalCallContext, reqMsg);
- } catch (Exception e) {
+ // Collect parameters with Out flag from the request message
+
+ ParameterInfo[] parameters = method.GetParameters();
+ object[] returnArgs = new object [parameters.Length];
+
+ int n = 0;
+ int noa = 0;
+ foreach (ParameterInfo par in parameters)
+ {
+ if (par.IsOut && !par.ParameterType.IsByRef)
+ returnArgs [n++] = reqMsg.GetArg (par.Position);
+ else if (par.ParameterType.IsByRef)
+ returnArgs [n++] = out_args [noa++];
+ }
+
+ result = new ReturnMessage (rval, returnArgs, n, CallContext.CreateLogicalCallContext(), reqMsg);
+ }
+ catch (Exception e)
+ {
result = new ReturnMessage (e, reqMsg);
}
-
+
+ CallContext.RestoreCallContext (oldContext);
return result;
}
+ public static IMethodReturnMessage ExecuteMessage (
+ MarshalByRefObject target, IMethodCallMessage reqMsg)
+ {
+ if (IsTransparentProxy(target))
+ {
+ // Message must go through all chain of sinks
+ RealProxy rp = GetRealProxy (target);
+ return (IMethodReturnMessage) rp.Invoke (reqMsg);
+ }
+ else // Direct call
+ return InternalExecuteMessage (target, reqMsg);
+ }
+
public static object Connect (Type classToProxy, string url)
{
- IMessageSink sink = null;
- string uri;
-
- IChannel [] channels = ChannelServices.RegisteredChannels;
+ ObjRef objRef = new ObjRef (classToProxy, url, null);
+ return GetRemoteObject (objRef, classToProxy);
+ }
- foreach (IChannel c in channels) {
- IChannelSender sender = c as IChannelSender;
-
- if (sender != null) {
- sink = sender.CreateMessageSink (url, null, out uri);
+ public static object Connect (Type classToProxy, string url, object data)
+ {
+ ObjRef objRef = new ObjRef (classToProxy, url, data);
+ return GetRemoteObject (objRef, classToProxy);
+ }
- if (sink != null)
- break;
- }
- }
+ public static bool Disconnect (MarshalByRefObject obj)
+ {
+ if (obj == null) throw new ArgumentNullException ("obj");
- if (sink == null) {
- string msg = String.Format ("Cannot create channel sink to connect to URL {0}.", url);
- throw new RemotingException (msg);
- }
+ ServerIdentity identity;
+
+ if (IsTransparentProxy (obj))
+ {
+ // CBOs are always accessed through a proxy, even in the server, so
+ // for server CBOs it is ok to disconnect a proxy
- RemotingProxy real_proxy = new RemotingProxy (classToProxy, sink);
+ RealProxy proxy = GetRealProxy(obj);
+ if (proxy.GetProxiedType().IsContextful && (proxy.ObjectIdentity is ServerIdentity))
+ identity = proxy.ObjectIdentity as ServerIdentity;
+ else
+ throw new ArgumentException ("The obj parameter is a proxy");
+ }
+ else
+ identity = obj.ObjectIdentity;
- return real_proxy.GetTransparentProxy ();
+ if (identity == null || !identity.IsConnected)
+ return false;
+ else
+ {
+ LifetimeServices.StopTrackingLifetime (identity);
+ DisposeIdentity (identity);
+ return true;
+ }
}
public static Type GetServerTypeForUri (string uri)
{
- object svr = GetServerForUri (uri);
-
- if (svr == null)
- return null;
-
- return svr.GetType ();
+ Identity ident = GetIdentityForUri (uri);
+ if (ident == null) return null;
+ return ident.ObjectType;
}
public static string GetObjectUri (MarshalByRefObject obj)
{
- throw new NotImplementedException ();
- }
-
- static Hashtable uri_hash = new Hashtable ();
-
- private static void RegisterServerForUri (MarshalByRefObject obj, string uri)
- {
- uri_hash [uri] = obj;
+ Identity ident = GetObjectIdentity(obj);
+ if (ident is ClientIdentity) return ((ClientIdentity)ident).TargetUri;
+ else if (ident != null) return ident.ObjectUri;
+ else return null;
}
public static object Unmarshal (ObjRef objref)
{
- return objref.GetRealObject (new StreamingContext (StreamingContextStates.Other));
+ return Unmarshal(objref, true);
}
- internal static MarshalByRefObject GetServerForUri (string uri)
+ public static object Unmarshal (ObjRef objref, bool fRefine)
{
- return (MarshalByRefObject)uri_hash [uri];
+ // FIXME: use type name when fRefine==true
+
+ Type classToProxy = fRefine ? objref.ServerType : typeof (MarshalByRefObject);
+ if (classToProxy == null) classToProxy = typeof (MarshalByRefObject);
+
+ if (objref.IsReferenceToWellKnow)
+ return GetRemoteObject(objref, classToProxy);
+ else
+ {
+ if (classToProxy.IsContextful)
+ {
+ // Look for a ProxyAttribute
+ ProxyAttribute att = (ProxyAttribute) Attribute.GetCustomAttribute (classToProxy, typeof(ProxyAttribute),true);
+ if (att != null)
+ return att.CreateProxy (objref, classToProxy, null, null).GetTransparentProxy();
+ }
+ return GetProxyForRemoteObject (objref, classToProxy);
+ }
}
-
- static Mutex mtx = new Mutex ();
-
+
public static ObjRef Marshal (MarshalByRefObject obj)
{
- string uri = app_id + Environment.TickCount + "_" + next_id++;
- return Marshal (obj, uri, null);
+ return Marshal (obj, null, null);
}
public static ObjRef Marshal (MarshalByRefObject obj, string uri)
public static ObjRef Marshal (MarshalByRefObject obj, string uri, Type requested_type)
{
- if (RemotingServices.IsTransparentProxy (obj))
- throw new RemotingException ("its not possible marshal proxy objects");
-
- // fixme: handle requested_type
- Type type = obj.GetType ();
+ if (IsTransparentProxy (obj))
+ {
+ RealProxy proxy = RemotingServices.GetRealProxy(obj);
+ Identity identity = proxy.ObjectIdentity;
- ObjRef res = null;
+ if (identity != null)
+ {
+ if (identity.ObjectType.IsContextful && !identity.IsConnected)
+ {
+ // Unregistered local contextbound object. Register now.
+ ClientActivatedIdentity cboundIdentity = (ClientActivatedIdentity)identity;
+ if (uri == null) uri = NewUri();
+ cboundIdentity.ObjectUri = uri;
+ RegisterServerIdentity (cboundIdentity);
+ cboundIdentity.StartTrackingLifetime ((ILease)obj.InitializeLifetimeService());
+ return cboundIdentity.CreateObjRef(requested_type);
+ }
+ else if (uri != null)
+ throw new RemotingException ("It is not possible marshal a proxy of a remote object");
- try {
- mtx.WaitOne ();
-
- object svr = GetServerForUri (uri);
+ return proxy.ObjectIdentity.CreateObjRef(requested_type);
+ }
+ }
- if (svr != null) {
- if (obj != svr)
- throw new RemotingException ("uri already in use, " + uri);
+ if (requested_type == null) requested_type = obj.GetType();
- // already registered
- } else {
- RegisterServerForUri (obj, uri);
+ if (uri == null)
+ {
+ uri = NewUri();
+ CreateClientActivatedServerIdentity (obj, requested_type, uri);
+ }
+ else
+ {
+ ClientActivatedIdentity identity = GetIdentityForUri (uri) as ClientActivatedIdentity;
+ if (identity == null || obj != identity.GetServerObject())
+ CreateClientActivatedServerIdentity (obj, requested_type, uri);
+ }
+
+ return obj.CreateObjRef(requested_type);
+ }
+
+ static string NewUri ()
+ {
+ return app_id + Environment.TickCount + "_" + next_id++;
+ }
+
+ public static RealProxy GetRealProxy (object proxy)
+ {
+ if (!IsTransparentProxy(proxy)) throw new RemotingException("Cannot get the real proxy from an object that is not a transparent proxy");
+ return (RealProxy)((TransparentProxy)proxy)._rp;
+ }
+
+ public static MethodBase GetMethodBaseFromMethodMessage(IMethodMessage msg)
+ {
+ Type type = Type.GetType (msg.TypeName);
+ if (type == null)
+ throw new RemotingException ("Type '" + msg.TypeName + "' not found!");
+
+ BindingFlags bflags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
+ if (msg.MethodSignature == null)
+ return type.GetMethod (msg.MethodName, bflags);
+ else
+ return type.GetMethod (msg.MethodName, bflags, null, (Type[]) msg.MethodSignature, null);
+ }
+
+ public static void GetObjectData(object obj, SerializationInfo info, StreamingContext context)
+ {
+ if (obj == null) throw new ArgumentNullException ("obj");
+
+ ObjRef oref = Marshal ((MarshalByRefObject)obj);
+ oref.GetObjectData (info, context);
+ }
+
+ public static ObjRef GetObjRefForProxy(MarshalByRefObject obj)
+ {
+ Identity ident = GetObjectIdentity(obj);
+ if (ident == null) return null;
+ else return ident.CreateObjRef(null);
+ }
+
+ public static object GetLifetimeService (MarshalByRefObject obj)
+ {
+ if (obj == null) return null;
+ return obj.GetLifetimeService ();
+ }
+
+ public static IMessageSink GetEnvoyChainForProxy (MarshalByRefObject obj)
+ {
+ if (IsTransparentProxy(obj))
+ return ((ClientIdentity)GetRealProxy (obj).ObjectIdentity).EnvoySink;
+ else
+ throw new ArgumentException ("obj must be a proxy","obj");
+ }
+
+ public static void LogRemotingStage (int stage)
+ {
+ throw new NotImplementedException ();
+ }
+
+ [MonoTODO]
+ public static string GetSessionIdForMethodMessage(IMethodMessage msg)
+ {
+ throw new NotImplementedException ();
+ }
+
+ public static bool IsMethodOverloaded(IMethodMessage msg)
+ {
+ Type type = msg.MethodBase.DeclaringType;
+ MemberInfo[] members = type.GetMember (msg.MethodName, MemberTypes.Method, BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);
+ return members.Length > 1;
+ }
+
+ public static bool IsObjectOutOfAppDomain(object tp)
+ {
+ Identity ident = GetObjectIdentity((MarshalByRefObject)tp);
+ if (ident != null) return !ident.IsFromThisAppDomain;
+ else return false;
+ }
+
+ public static bool IsObjectOutOfContext(object tp)
+ {
+ ServerIdentity ident = GetObjectIdentity((MarshalByRefObject)tp) as ServerIdentity;
+ if (ident != null) return ident.Context != System.Threading.Thread.CurrentContext;
+ else return false;
+ }
+
+ public static bool IsOneWay(MethodBase method)
+ {
+ // TODO: use internal call for better performance
+ object[] atts = method.GetCustomAttributes (typeof (OneWayAttribute), false);
+ return atts.Length > 0;
+ }
+
+ public static bool IsAsyncMessage(IMessage msg)
+ {
+ if (! (msg is MonoMethodMessage)) return false;
+ else if (((MonoMethodMessage)msg).IsAsync) return true;
+ else if (IsOneWay (((MonoMethodMessage)msg).MethodBase)) return true;
+ else return false;
+ }
+
+ public static void SetObjectUriForMarshal(MarshalByRefObject obj, string uri)
+ {
+ if (IsTransparentProxy (obj)) throw new RemotingException ("SetObjectUriForMarshal method should only be called for MarshalByRefObjects that exist in the current AppDomain.");
+ Marshal (obj, uri);
+ }
+
+ #region Internal Methods
+
+ internal static object CreateClientProxy (ActivatedClientTypeEntry entry, object[] activationAttributes)
+ {
+ if (entry.ContextAttributes != null || activationAttributes != null)
+ {
+ ArrayList props = new ArrayList ();
+ if (entry.ContextAttributes != null) props.AddRange (entry.ContextAttributes);
+ if (activationAttributes != null) props.AddRange (activationAttributes);
+ return CreateClientProxy (entry.ObjectType, entry.ApplicationUrl, props.ToArray ());
+ }
+ else
+ return CreateClientProxy (entry.ObjectType, entry.ApplicationUrl, null);
+ }
+
+ internal static object CreateClientProxy (Type objectType, string url, object[] activationAttributes)
+ {
+ string activationUrl = url + "/RemoteActivationService.rem";
+
+ string objectUri;
+ IMessageSink sink = GetClientChannelSinkChain (activationUrl, null, out objectUri);
+
+ RemotingProxy proxy = new RemotingProxy (objectType, activationUrl, activationAttributes);
+ return proxy.GetTransparentProxy();
+ }
+
+ internal static object CreateClientProxy (WellKnownClientTypeEntry entry)
+ {
+ return Connect (entry.ObjectType, entry.ObjectUrl, null);
+ }
+
+ internal static object CreateClientProxyForContextBound (Type type, object[] activationAttributes)
+ {
+ if (type.IsContextful)
+ {
+ // Look for a ProxyAttribute
+ ProxyAttribute att = (ProxyAttribute) Attribute.GetCustomAttribute (type, typeof(ProxyAttribute), true);
+ if (att != null)
+ return att.CreateInstance (type);
+ }
+ RemotingProxy proxy = new RemotingProxy (type, ChannelServices.CrossContextUrl, activationAttributes);
+ return proxy.GetTransparentProxy();
+ }
+
+ internal static Identity GetIdentityForUri (string uri)
+ {
+ lock (uri_hash)
+ {
+ return (Identity)uri_hash [uri];
+ }
+ }
+
+ internal static Identity GetObjectIdentity (MarshalByRefObject obj)
+ {
+ if (IsTransparentProxy(obj))
+ return GetRealProxy (obj).ObjectIdentity;
+ else
+ return obj.ObjectIdentity;
+ }
+
+ internal static ClientIdentity GetOrCreateClientIdentity(ObjRef objRef, Type proxyType)
+ {
+ // This method looks for an identity for the given url.
+ // If an identity is not found, it creates the identity and
+ // assigns it a proxy to the remote object.
+
+ // Creates the client sink chain for the given url or channelData.
+ // It will also get the object uri from the url.
+
+ object channelData = objRef.ChannelInfo != null ? objRef.ChannelInfo.ChannelData : null;
+ string url = (channelData == null) ? objRef.URI : null;
+
+ string objectUri;
+ IMessageSink sink = GetClientChannelSinkChain (url, channelData, out objectUri);
+
+ if (objectUri == null) objectUri = objRef.URI;
+
+ lock (uri_hash)
+ {
+ ClientIdentity identity = uri_hash [objRef.URI] as ClientIdentity;
+ if (identity != null)
+ return identity; // Object already registered
+
+ // Creates an identity and a proxy for the remote object
+
+ identity = new ClientIdentity (objectUri, objRef);
+ identity.ChannelSink = sink;
+
+ if (proxyType != null)
+ {
+ RemotingProxy proxy = new RemotingProxy (proxyType, identity);
+ identity.ClientProxy = (MarshalByRefObject) proxy.GetTransparentProxy();
}
-
- // res = obj.CreateObjRef (type);
- res = new ObjRef (obj, type);
- res.URI = uri;
-
- } finally {
- mtx.ReleaseMutex ();
+
+ // Registers the identity
+ uri_hash [objRef.URI] = identity;
+ return identity;
}
-
- return res;
}
- }
+ static IMessageSink GetClientChannelSinkChain(string url, object channelData, out string objectUri)
+ {
+ IMessageSink sink = ChannelServices.CreateClientChannelSinkChain (url, channelData, out objectUri);
+ if (sink == null)
+ {
+ if (url != null)
+ {
+ string msg = String.Format ("Cannot create channel sink to connect to URL {0}. An appropriate channel has probably not been registered.", url);
+ throw new RemotingException (msg);
+ }
+ else
+ {
+ string msg = String.Format ("Cannot create channel sink to connect to the remote object. An appropriate channel has probably not been registered.", url);
+ throw new RemotingException (msg);
+ }
+ }
+ return sink;
+ }
+
+ internal static ClientActivatedIdentity CreateContextBoundObjectIdentity(Type objectType)
+ {
+ ClientActivatedIdentity identity = new ClientActivatedIdentity (null, objectType);
+ identity.ChannelSink = ChannelServices.CrossContextChannel;
+ return identity;
+ }
+
+ internal static ClientActivatedIdentity CreateClientActivatedServerIdentity(MarshalByRefObject realObject, Type objectType, string objectUri)
+ {
+ ClientActivatedIdentity identity = new ClientActivatedIdentity (objectUri, objectType);
+ identity.AttachServerObject (realObject, Context.DefaultContext);
+ RegisterServerIdentity (identity);
+ identity.StartTrackingLifetime ((ILease)realObject.InitializeLifetimeService ());
+ return identity;
+ }
+
+ internal static ServerIdentity CreateWellKnownServerIdentity(Type objectType, string objectUri, WellKnownObjectMode mode)
+ {
+ ServerIdentity identity;
+
+ if (mode == WellKnownObjectMode.SingleCall)
+ identity = new SingleCallIdentity(objectUri, Context.DefaultContext, objectType);
+ else
+ identity = new SingletonIdentity(objectUri, Context.DefaultContext, objectType);
+
+ RegisterServerIdentity (identity);
+ return identity;
+ }
+
+ private static void RegisterServerIdentity(ServerIdentity identity)
+ {
+ lock (uri_hash)
+ {
+ if (uri_hash.ContainsKey (identity.ObjectUri))
+ throw new RemotingException ("Uri already in use: " + identity.ObjectUri);
+
+ uri_hash[identity.ObjectUri] = identity;
+ }
+ }
+
+ internal static object GetProxyForRemoteObject (ObjRef objref, Type classToProxy)
+ {
+ ClientActivatedIdentity identity = GetIdentityForUri (objref.URI) as ClientActivatedIdentity;
+ if (identity != null) return identity.GetServerObject ();
+ else return GetRemoteObject (objref, classToProxy);
+ }
+
+ internal static object GetRemoteObject(ObjRef objRef, Type proxyType)
+ {
+ ClientIdentity id = GetOrCreateClientIdentity (objRef, proxyType);
+ return id.ClientProxy;
+ }
+
+ internal static object GetDomainProxy(AppDomain domain)
+ {
+ byte[] data = null;
+
+ Context currentContext = Thread.CurrentContext;
+ AppDomain currentDomain = AppDomain.InternalSetDomain (domain);
+ try
+ {
+ data = domain.GetMarshalledDomainObjRef ();
+ }
+ finally
+ {
+ AppDomain.InternalSetDomain (currentDomain);
+ AppDomain.InternalSetContext (currentContext);
+ }
+
+ MemoryStream stream = new MemoryStream (data);
+ ObjRef appref = (ObjRef) CADSerializer.DeserializeObject (stream);
+ return (AppDomain) RemotingServices.Unmarshal(appref);
+ }
+
+ private static void RegisterInternalChannels()
+ {
+ CrossAppDomainChannel.RegisterCrossAppDomainChannel();
+ }
+
+ internal static void DisposeIdentity (ServerIdentity ident)
+ {
+ lock (uri_hash)
+ {
+ uri_hash.Remove (ident.ObjectUri);
+ }
+ }
+
+ internal static Identity GetMessageTargetIdentity (IMessage msg)
+ {
+ // Returns the identity where the message is sent
+
+ if (msg is IInternalMessage)
+ return ((IInternalMessage)msg).TargetIdentity;
+
+ lock (uri_hash)
+ {
+ return uri_hash [((IMethodMessage)msg).Uri] as ServerIdentity;
+ }
+ }
+
+ internal static void SetMessageTargetIdentity (IMessage msg, Identity ident)
+ {
+ if (msg is IInternalMessage)
+ ((IInternalMessage)msg).TargetIdentity = ident;
+ }
+
+ internal static bool UpdateOutArgObject (ParameterInfo pi, object local, object remote)
+ {
+ if (local is StringBuilder)
+ {
+ StringBuilder sb = local as StringBuilder;
+ sb.Remove (0, sb.Length);
+ sb.Append (remote.ToString());
+ return true;
+ }
+ else if (pi.ParameterType.IsArray && ((Array)local).Rank == 1)
+ {
+ Array alocal = (Array) local;
+ if (alocal.Rank == 1)
+ {
+ Array.Copy ((Array) remote, alocal, alocal.Length);
+ return true;
+ }
+ else
+ {
+ // TODO
+ }
+ }
+ return false;
+ }
+
+ #endregion
+ }
}
projects / mono.git / blobdiff