AddInServer.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / AddIn / AddIn / System / Addin / Hosting / AddInServer.cs / 1305376 / AddInServer.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class:  AddInServer 
**
** Purpose: Created in the remote process, this worker is 
**     used to start up & shut down the add-in.
**
===========================================================*/
using System; 
using System.AddIn;
using System.AddIn.Contract; 
using System.AddIn.Hosting; 
using System.AddIn.Pipeline;
using System.Collections.Generic; 
using System.ComponentModel;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.IO; 
using System.Reflection;
using System.Runtime.Remoting; 
using System.Security; 
using System.Security.Permissions;
using System.Threading; 
using System.Diagnostics.Contracts;

namespace System.AddIn.Hosting
{ 
    [SuppressMessage("Microsoft.Performance","CA1812:AvoidUninstantiatedInternalClasses", Justification="Instantiation is via remoting")]
    internal sealed class AddInServer : MarshalByRefObject 
    { 
        private int _addInAppDomains = 0;
        private volatile bool _startedExitProcess = false; 

        // This serves as a MBRO that can send the ShuttingDown event back to the client
        private EventWorker _eventWorker;
 
        public void Initialize(EventWorker eventWorker)
        { 
            _eventWorker = eventWorker; 
        }
 
        // 
        // 
        // 
        //  
        [System.Security.SecuritySafeCritical]
        public AddInServerWorker CreateDomain(AddInToken token, PermissionSet permissionSet) 
        { 
            AppDomain domain;
            AppDomainSetup setup = new AppDomainSetup(); 
            setup.ApplicationBase = Path.GetDirectoryName(token._addin.Location);
            setup.ConfigurationFile = token._addin.Location + ".config";

            Assembly sysCore = typeof(AddInActivator).Assembly; 
            domain = AppDomain.CreateDomain(token.Name,
                AppDomain.CurrentDomain.Evidence, setup, permissionSet, 
                AddInActivator.CreateStrongName(sysCore));  // Grant full trust to System.Core.dll 

            // Ensure we load System.Core.dll in this new AD. 
            domain.Load(sysCore.FullName);

            ObjectHandle workerHandle = Activator.CreateInstance(domain, sysCore.FullName, typeof(AddInServerWorker).FullName);
            AddInServerWorker server = (AddInServerWorker)workerHandle.Unwrap(); 

            server.AddInServer = this; 
 
            Interlocked.Increment(ref _addInAppDomains);
 
            return server;
        }

        public void ExitProcess() 
        {
            // set flag so that we don't call back to host from finalizers 
            _startedExitProcess = true; 
            // This is called in the full-trust appdomain, so no assert is needed.
            Environment.Exit(0); 
        }

        public void AddInDomainFinalized()
        { 
            long val = Interlocked.Decrement(ref _addInAppDomains);
            if (!_startedExitProcess && val == 0) 
            { 
                try
                { 
                    // the host will call ExitProcess here if it is not cancelled
                    _eventWorker.SendShutdownMessage();
                }
                catch (RemotingException) 
                {
                    // the application likely has shut down itself. 
                    // The main thread will shut down this app 
                }
            } 
        }

        // Don't let this object time out in Remoting.
        public override Object InitializeLifetimeService() 
        {
            return null; 
        } 
    }
 
    [SuppressMessage("Microsoft.Performance","CA1812:AvoidUninstantiatedInternalClasses", Justification="Instantiation is via remoting")]
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2128:SecurityTransparentCodeShouldNotAssert", Justification = "This is a SecurityRules.Level1 assembly, in which this rule is being incorrectly applied")]
    internal sealed class AddInServerWorker : MarshalByRefObject
    { 
        AddInServer _addInServer;
 
        [SuppressMessage("Microsoft.Security","CA2128:SecurityTransparentCodeShouldNotAssert", Justification="SafeCritical code can Assert")] 
        [System.Security.SecuritySafeCritical]
        public AddInServerWorker() 
        {
            PermissionSet permissionSet = new PermissionSet(PermissionState.None);
            permissionSet.AddPermission(new SecurityPermission(SecurityPermissionFlag.ControlPrincipal));
            permissionSet.AddPermission(new SecurityPermission(SecurityPermissionFlag.UnmanagedCode)); 
            permissionSet.AddPermission(new ReflectionPermission(PermissionState.Unrestricted));
            permissionSet.Assert(); 
 
            // without this call to initialize the client channel, this object cannot be remoted
            RemotingHelper.InitializeClientChannel(); 
        }

        // 
        //  
        // 
        //  
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1822:MarkMembersAsStatic", Justification="Needs to be instance for remoting"), 
         System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2122:DoNotIndirectlyExposeMethodsWithLinkDemands", Justification = "Reviewed")]
        [System.Security.SecuritySafeCritical] 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2128:SecurityTransparentCodeShouldNotAssert", Justification = "This is a SecurityRules.Level1 assembly, in which this rule is being incorrectly applied")]
        public void SetAppDomainOwner(IContract contract)
        {
            new SecurityPermission(SecurityPermissionFlag.ControlAppDomain).Assert(); 
            AppDomain.CurrentDomain.SetData(ContractHandle.s_appDomainOwner, contract);
        } 
 
        public AddInServer AddInServer
        { 
            set { _addInServer = value; }
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1822:MarkMembersAsStatic", Justification="Needs to be instance for remoting")] 
        public IContract Activate(AddInToken pipeline, out ActivationWorker worker)
        { 
            worker = new ActivationWorker(pipeline); 

            IContract contract = worker.Activate(); 

            return contract;
        }
 
        // Don't let this object time out in Remoting.
        public override Object InitializeLifetimeService() 
        { 
            return null;
        } 

        // 
        // 
        //  
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1822:MarkMembersAsStatic", Justification="Needs to be instance for remoting")]
        [System.Security.SecurityCritical] 
        public void UnloadAppDomain() 
        {
            SecurityPermission permission = new SecurityPermission(SecurityPermissionFlag.ControlAppDomain); 
            permission.Assert();

            AppDomain.Unload(AppDomain.CurrentDomain);
            // thread will be aborted 
        }
 
        //This appdomain must be going away 
        // 
        //  
        // 
        [System.Security.SecurityCritical]
        ~AddInServerWorker()
        { 
            if (_addInServer != null)
            { 
                _addInServer.AddInDomainFinalized(); 
            }
        } 
    }

    internal sealed class EventWorker : MarshalByRefObject
    { 
        AddInProcess _process;
 
        public EventWorker(AddInProcess process) 
        {
            _process = process; 
        }

        public bool SendShutdownMessage()
        { 
            CancelEventArgs args = new CancelEventArgs();
            _process.SendShuttingDown(args); 
            return args.Cancel; 
        }
    } 
}


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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