public bool Start()
{
if (this == s_currentProcess)
{
throw new InvalidOperationException(Res.OperationNotValidOnCurrentProcess);
}
if (_process == null)
{
lock (_processLock) {
if (_process == null)
{
_process = CreateAddInProcess();
// register for SendShuttingDown callbacks
AddInServer addInServer = GetAddInServer();
addInServer.Initialize(new EventWorker(this));
}
}
return(true);
}
return(false);
}
// This helper method may be called indirectly from user code via Shutdown()
// or by a finalizer thread cleaning up the remote process.
private void ShutDownUnlessCancelled(CancelEventArgs args)
{
if (ShuttingDown != null)
{
ShuttingDown(this, args);
}
if (args.Cancel)
{
return;
}
try
{
lock (_processLock) {
// Give addins a chance to clean up by running finalizers
// We'll get a remoting exception trying to read the response from this though.
AddInServer server = GetAddInServer();
_process = null;
_guid = Guid.Empty;
// Warning - if this was called from the finalizer thread of AddInProcess,
// nothing after this next call will execute, even if it's in a finally block,
// due to the calling process being torn down.
server.ExitProcess();
}
}
catch (RemotingException) {}
catch (System.Runtime.Serialization.SerializationException) {}
}
internal static T Activate <T>(AddInToken token, AddInProcess process, PermissionSet permissionSet)
{
if (token == null)
{
throw new ArgumentNullException("token");
}
if (permissionSet == null)
{
throw new ArgumentNullException("permissionSet");
}
if (process == null)
{
throw new ArgumentNullException("process");
}
System.Diagnostics.Contracts.Contract.EndContractBlock();
// check that they have ExecutionPermission. Otherwise OOP remoting fails
// by shutting down the pipe, leaving the user scratching his head.
if (!permissionSet.IsUnrestricted())
{
SecurityPermission p = (SecurityPermission)permissionSet.GetPermission(typeof(SecurityPermission));
SecurityPermissionFlag requiredFlags = SecurityPermissionFlag.Execution;
if (p == null || (p.Flags & requiredFlags) != requiredFlags)
{
throw new ArgumentException(Res.NeedSecurityFlags);
}
}
RemotingHelper.InitializeClientChannel();
AddInServer addInServer = process.GetAddInServer();
AddInServerWorker addInServerWorker = addInServer.CreateDomain(token, permissionSet);
AddInEnvironment fullEnvironment = new AddInEnvironment(process, addInServerWorker);
return(ActivateOutOfProcess <T>(token, fullEnvironment, true));
}