Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / RunTime / Tracking.cs / 1305376 / Tracking.cs
using System;
using System.Text;
using System.Reflection;
using System.ComponentModel;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Diagnostics;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Schema;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using System.Threading;
using System.Timers;
using System.Security.Permissions;
using System.Security.Cryptography;
using System.Workflow.Runtime;
using System.Workflow.ComponentModel;
using System.Workflow.Runtime.Hosting;
using System.Workflow.Runtime.Tracking;
namespace System.Workflow.Runtime
{
///
/// Creates TrackingListener instances
///
internal class TrackingListenerFactory
{
private List _services = null;
private bool _initialized = false;
private Dictionary _listeners = new Dictionary();
private volatile object _listenerLock = new object();
private System.Timers.Timer _timer = null;
private double _interval = 60000;
private TrackingProfileManager _profileManager = new TrackingProfileManager();
internal TrackingListenerFactory()
{
}
internal TrackingProfileManager TrackingProfileManager
{
get { return _profileManager; }
}
///
/// Must be called
///
///
internal void Initialize( WorkflowRuntime runtime )
{
lock ( this )
{
_services = runtime.TrackingServices;
_profileManager.Initialize(runtime);
runtime.WorkflowExecutorInitializing += WorkflowExecutorInitializing;
_timer = new System.Timers.Timer();
_timer.Interval = _interval;
_timer.AutoReset = false; // ensure that only one timer thread at a time
_timer.Elapsed += new ElapsedEventHandler( Cleanup );
_timer.Start();
_initialized = true;
}
}
///
/// Clean up static state created in Initialize
///
internal void Uninitialize( WorkflowRuntime runtime )
{
lock ( this )
{
_profileManager.Uninitialize();
runtime.WorkflowExecutorInitializing -= WorkflowExecutorInitializing;
_timer.Elapsed -= new ElapsedEventHandler(Cleanup);
_timer.Stop();
_services = null;
_initialized = false;
_timer.Dispose();
_timer = null;
}
}
///
/// Callback for associating tracking listeners to in memory instances. Fires for new and loading instances.
///
/// WorkflowExecutor
///
void WorkflowExecutorInitializing( object sender, WorkflowRuntime.WorkflowExecutorInitializingEventArgs e )
{
if ( null == sender )
throw new ArgumentNullException( "sender" );
if ( null == e )
throw new ArgumentNullException( "e" );
if ( !typeof( WorkflowExecutor ).IsInstanceOfType( sender ) )
throw new ArgumentException( "sender" );
WorkflowExecutor exec = ( WorkflowExecutor ) sender;
//
// Add an event to clean up the WeakRef entry
exec.WorkflowExecutionEvent += new EventHandler( WorkflowExecutionEvent );
TrackingCallingState trackingCallingState = exec.TrackingCallingState;
TrackingListenerBroker listenerBroker = (TrackingListenerBroker)exec.RootActivity.GetValue(WorkflowExecutor.TrackingListenerBrokerProperty);
if (listenerBroker != null)
{
listenerBroker.ReplaceServices(exec.WorkflowRuntime.TrackingServiceReplacement);
}
TrackingListener listener = null;
//
// Check if we still have a weakref to the listener for this instance
WeakReference weakref = null;
if ( e.Loading )
{
bool found = false;
lock ( _listenerLock )
{
found = _listeners.TryGetValue( exec.InstanceId, out weakref );
}
if ( found )
{
try
{
//
// Instead of checking IsAlive take a ref to the Target
// so that it isn't GC'd underneath us.
listener = weakref.Target as TrackingListener;
}
catch ( InvalidOperationException )
{
//
// This seems weird but according to msdn
// accessing Target can throw ???
// Ignore because it's the same as a null target.
}
}
//
// If listener is null because we didn't find the wr in the cache
// or because the Target has been GC'd create a new listener
if (null != listener)
{
listener.Broker = listenerBroker;
}
else
{
Debug.Assert(null != listenerBroker, "TrackingListenerBroker should not be null during loading");
listener = GetTrackingListener(exec.WorkflowDefinition, exec, listenerBroker);
if (null != listener)
{
if (null != weakref)
weakref.Target = listener;
else
{
lock (_listenerLock)
{
_listeners.Add(exec.ID, new WeakReference(listener));
}
}
}
}
}
else
{
//
// New instance is being created
listener = GetTrackingListener( exec.WorkflowDefinition, exec );
if ( null != listener )
{
exec.RootActivity.SetValue(WorkflowExecutor.TrackingListenerBrokerProperty, listener.Broker);
lock ( _listenerLock )
{
_listeners.Add( exec.ID, new WeakReference( listener ) );
}
}
else
exec.RootActivity.SetValue(WorkflowExecutor.TrackingListenerBrokerProperty, new TrackingListenerBroker());
}
if ( null != listener )
{
exec.WorkflowExecutionEvent += new EventHandler( listener.WorkflowExecutionEvent );
}
}
void WorkflowExecutionEvent( object sender, WorkflowExecutor.WorkflowExecutionEventArgs e )
{
switch ( e.EventType )
{
case WorkflowEventInternal.Aborted:
case WorkflowEventInternal.Completed:
case WorkflowEventInternal.Terminated:
//
// The instance is done - remove
// the WeakRef from our list
WorkflowExecutor exec = ( WorkflowExecutor ) sender;
lock ( _listenerLock )
{
_listeners.Remove( exec.ID );
}
break;
default:
return;
}
}
void Cleanup( object sender, ElapsedEventArgs e )
{
List _toRemove = new List();
if ( ( null != _listeners ) || ( _listeners.Count > 0 ) )
{
lock ( _listenerLock )
{
foreach ( KeyValuePair kvp in _listeners )
{
if ( null == kvp.Value.Target )
_toRemove.Add( kvp.Key );
}
if ( _toRemove.Count > 0 )
{
foreach( Guid g in _toRemove )
_listeners.Remove( g );
}
}
}
lock (this)
{
if (_timer != null)
{
_timer.Start();
}
}
}
///
/// Return a tracking listener for a new instance
///
/// SequentialWorkflow for which the tracking listener will be associated
/// ScheduleExecutor for the schedule instance
/// New TrackingListener instance
internal TrackingListener GetTrackingListener(Activity sked, WorkflowExecutor skedExec)
{
if ( !_initialized )
Initialize(skedExec.WorkflowRuntime);
return GetListener(sked, skedExec, null );
}
///
/// Return a tracking listener for an existing instance (normally used during loading)
///
/// SequentialWorkflow for which the tracking listener will be associated
/// ScheduleExecutor for the schedule instance
/// TrackingListenerBroker
/// New TrackingListener instance
internal TrackingListener GetTrackingListener(Activity sked, WorkflowExecutor skedExec, TrackingListenerBroker broker)
{
if ( !_initialized )
Initialize(skedExec.WorkflowRuntime);
if ( null == broker )
{
WorkflowTrace.Tracking.TraceEvent( TraceEventType.Error, 0, ExecutionStringManager.NullTrackingBroker );
return null;
}
return GetListener(sked, skedExec, broker);
}
private TrackingListener GetListenerFromWRCache( Guid instanceId )
{
WeakReference wr = null;
TrackingListener listener = null;
lock ( _listenerLock )
{
if (!_listeners.TryGetValue(instanceId, out wr))
throw new InvalidOperationException(string.Format(System.Globalization.CultureInfo.InvariantCulture, ExecutionStringManager.ListenerNotInCache, instanceId));
listener = wr.Target as TrackingListener;
if ( null == listener )
throw new ObjectDisposedException(string.Format(System.Globalization.CultureInfo.InvariantCulture, ExecutionStringManager.ListenerNotInCacheDisposed, instanceId));
}
return listener;
}
internal void ReloadProfiles(WorkflowExecutor exec)
{
// Keep control events from other threads out
using ( new ServiceEnvironment( exec.RootActivity ) )
{
using ( exec.ExecutorLock.Enter() )
{
// check if this is a valid in-memory instance
if ( !exec.IsInstanceValid )
throw new InvalidOperationException(ExecutionStringManager.WorkflowNotValid);
// suspend the instance
bool localSuspend = exec.Suspend(ExecutionStringManager.TrackingProfileUpdate);
try
{
//
// Get new profiles
TrackingListener listener = GetListenerFromWRCache( exec.InstanceId );
listener.ReloadProfiles(exec, exec.InstanceId);
}
finally
{
if ( localSuspend )
{
// @undone: for now this will not return till the instance is done
// Once Kumar has fixed 4335, we can enable this.
exec.Resume();
}
}
}
}
}
internal void ReloadProfiles( WorkflowExecutor exec, Guid instanceId, ref TrackingListenerBroker broker, ref List channels )
{
Type workflowType = exec.WorkflowDefinition.GetType();
//
// Ask every tracking service if they want to reload
// even if they originally returned null for a profile
foreach ( TrackingService service in _services )
{
TrackingProfile profile = null;
TrackingChannelWrapper w = null;
//
// Check if the service wants to reload a profile
if ( service.TryReloadProfile( workflowType, instanceId, out profile ) )
{
bool found = false;
int i;
for ( i = 0; i < channels.Count; i++ )
{
if ( service.GetType() == channels[i].TrackingServiceType )
{
w = channels[i];
found = true;
break;
}
}
//
// If we don't have a profile, remove what we had for this service type (if anything)
if ( null == profile )
{
if ( found )
{
broker.RemoveService( w.TrackingServiceType );
channels.RemoveAt( i );
}
continue;
}
//
// Parse the new profile - instance only, the cache is not involved
RTTrackingProfile rtp = new RTTrackingProfile( profile, exec.WorkflowDefinition, workflowType );
rtp.IsPrivate = true;
if ( !found )
{
//
// This is a new profile, create new channel, channelwrapper and broker item
List activityCallPath = null;
Guid callerInstanceId = Guid.Empty;
TrackingCallingState trackingCallingState = exec.TrackingCallingState;
Debug.Assert((null != trackingCallingState), "WorkflowState is null");
IList path = null;
Guid context = GetContext(exec.RootActivity), callerContext = Guid.Empty, callerParentContext = Guid.Empty;
//
// Use CallerActivityPathProxy to determine if this is an invoked instance
if(trackingCallingState != null)
{
path = trackingCallingState.CallerActivityPathProxy;
if ((null != path) && (path.Count > 0))
{
activityCallPath = new List(path);
Debug.Assert(Guid.Empty != trackingCallingState.CallerWorkflowInstanceId, "Instance has an ActivityCallPath but CallerInstanceId is empty");
callerInstanceId = trackingCallingState.CallerWorkflowInstanceId;
callerContext = trackingCallingState.CallerContextGuid;
callerParentContext = trackingCallingState.CallerParentContextGuid;
}
}
TrackingParameters tp = new TrackingParameters( instanceId, workflowType, exec.WorkflowDefinition, activityCallPath, callerInstanceId, context, callerContext, callerParentContext );
TrackingChannel channel = service.GetTrackingChannel( tp );
TrackingChannelWrapper wrapper = new TrackingChannelWrapper( channel, service.GetType(), workflowType, rtp );
channels.Add( wrapper );
Type t = service.GetType();
broker.AddService( t, rtp.Version );
broker.MakeProfileInstance( t );
}
else
{
//
// Don't need to call MakeProfilePrivate on the wrapper
// because we've already marked it as private and we already
// have a private copy of it.
//w.MakeProfilePrivate( exec );
w.SetTrackingProfile( rtp );
broker.MakeProfileInstance( w.TrackingServiceType );
}
}
}
}
internal Guid GetContext(Activity activity)
{
return ((ActivityExecutionContextInfo)ContextActivityUtils.ContextActivity(activity).GetValue(Activity.ActivityExecutionContextInfoProperty)).ContextGuid;
}
private TrackingListener GetListener(Activity sked, WorkflowExecutor skedExec, TrackingListenerBroker broker)
{
if ( ( null == sked ) || ( null == skedExec ) )
{
WorkflowTrace.Tracking.TraceEvent( TraceEventType.Error, 0, ExecutionStringManager.NullParameters );
return null;
}
if ( ( null == _services ) || ( _services.Count <= 0 ) )
return null;
bool load = ( null != broker );
List channels = GetChannels(sked, skedExec, skedExec.InstanceId, sked.GetType(), ref broker);
if ( ( null == channels ) || ( 0 == channels.Count ) )
return null;
return new TrackingListener( this, sked, skedExec, channels, broker, load );
}
private List GetChannels(Activity schedule, WorkflowExecutor exec, Guid instanceID, Type workflowType, ref TrackingListenerBroker broker)
{
if ( null == _services )
return null;
bool initBroker = false;
if ( null == broker )
{
broker = new TrackingListenerBroker();
initBroker = true;
}
List channels = new List();
List activityCallPath = null;
Guid callerInstanceId = Guid.Empty;
Guid context = GetContext(exec.RootActivity), callerContext = Guid.Empty, callerParentContext = Guid.Empty;
Debug.Assert( exec is WorkflowExecutor, "Executor is not WorkflowExecutor" );
TrackingCallingState trackingCallingState = exec.TrackingCallingState;
TrackingListenerBroker trackingListenerBroker = (TrackingListenerBroker)exec.RootActivity.GetValue(WorkflowExecutor.TrackingListenerBrokerProperty);
IList path = trackingCallingState != null? trackingCallingState.CallerActivityPathProxy : null;
//
// Use CallerActivityPathProxy to determine if this is an invoked instance
if ( ( null != path ) && ( path.Count > 0 ) )
{
activityCallPath = new List(path);
Debug.Assert(Guid.Empty != trackingCallingState.CallerWorkflowInstanceId, "Instance has an ActivityCallPath but CallerInstanceId is empty");
callerInstanceId = trackingCallingState.CallerWorkflowInstanceId;
callerContext = trackingCallingState.CallerContextGuid;
callerParentContext = trackingCallingState.CallerParentContextGuid;
}
TrackingParameters parameters = new TrackingParameters( instanceID, workflowType, exec.WorkflowDefinition, activityCallPath, callerInstanceId, context, callerContext, callerParentContext );
for( int i=0; i<_services.Count; i++ )
{
TrackingChannel channel = null;
Type serviceType = _services[i].GetType();
//
// See if the service has a profile for this schedule type
// If not we don't do any tracking for the service
//
RTTrackingProfile profile = null;
//
// If we've created the broker get the current version of the profile
if ( initBroker )
{
profile = _profileManager.GetProfile( _services[i], schedule );
if ( null == profile )
continue;
broker.AddService( serviceType, profile.Version );
}
else
{
//
// Only reload the services that are in the broker
// If services that weren't originally associated to an instance
// wish to join that instance they should call ReloadTrackingProfiles
if ( !broker.ContainsService( serviceType ) )
continue;
if ( broker.IsProfileInstance( serviceType ) )
{
profile = _profileManager.GetProfile( _services[i], schedule, instanceID );
if ( null == profile )
throw new InvalidOperationException( ExecutionStringManager.MissingProfileForService + serviceType.ToString() );
profile.IsPrivate = true;
}
else
{
Version versionId;
if ( broker.TryGetProfileVersionId( serviceType, out versionId ) )
{
profile = _profileManager.GetProfile( _services[i], schedule, versionId );
if ( null == profile )
throw new InvalidOperationException(ExecutionStringManager.MissingProfileForService + serviceType.ToString() + ExecutionStringManager.MissingProfileForVersion + versionId.ToString());
//
// If the profile is marked as private clone the instance we got from the cache
// The cloned instance is marked as private during the cloning
if ( broker.IsProfilePrivate( serviceType ) )
{
profile = profile.Clone();
profile.IsPrivate = true;
}
}
else
continue;
}
}
//
// If profile is not null get a channel
channel = _services[i].GetTrackingChannel( parameters );
if ( null == channel )
throw new InvalidOperationException( ExecutionStringManager.NullChannel );
channels.Add( new TrackingChannelWrapper( channel, _services[i].GetType(), workflowType, profile ) );
}
return channels;
}
}
///
/// Handles subscribing to status change events and receiving event notifications.
///
internal class TrackingListener
{
private List _channels = null;
private TrackingListenerBroker _broker = null;
private TrackingListenerFactory _factory = null;
protected TrackingListener()
{
}
internal TrackingListener(TrackingListenerFactory factory, Activity sked, WorkflowExecutor exec, List channels, TrackingListenerBroker broker, bool load)
{
if ( ( null == sked ) || ( null == broker ) )
{
WorkflowTrace.Tracking.TraceEvent( TraceEventType.Error, 0, ExecutionStringManager.NullParameters );
return;
}
_factory = factory;
_channels = channels;
//
// Keep a reference to the broker so that we can hand it out when adding subscriptions
_broker = broker;
//
// Give the broker our reference so that it can call us back on behalf of subscriptions
_broker.TrackingListener = this;
}
internal TrackingListenerBroker Broker
{
get { return _broker; }
set { _broker = value; }
}
internal void ReloadProfiles( WorkflowExecutor exec, Guid instanceId )
{
//
// Ask the factory to redo the channels and broker
_factory.ReloadProfiles( exec, instanceId, ref _broker, ref _channels );
}
#region Event Handlers
internal void ActivityStatusChange( object sender, WorkflowExecutor.ActivityStatusChangeEventArgs e )
{
WorkflowTrace.Tracking.TraceInformation("TrackingListener::ActivityStatusChange - Received Activity Status Change Event for activity {0}", e.Activity.QualifiedName);
if ( null == sender )
throw new ArgumentNullException( "sender" );
if ( !typeof( WorkflowExecutor ).IsInstanceOfType( sender ) )
throw new ArgumentException( "sender" );
if ( null == e )
throw new ArgumentNullException( "e" );
WorkflowExecutor exec = ( WorkflowExecutor ) sender;
if ( ( null == _channels ) || ( _channels.Count <= 0 ) )
{
WorkflowTrace.Tracking.TraceEvent( TraceEventType.Error, 0, ExecutionStringManager.NoChannels );
return;
}
Activity activity = e.Activity;
if ( !SubscriptionRequired( activity, exec ) )
return;
//
// Get the shared data that is the same for each tracking channel that gets a record
Guid parentContextGuid = Guid.Empty, contextGuid = Guid.Empty;
GetContext(activity, exec, out contextGuid, out parentContextGuid);
DateTime dt = DateTime.UtcNow;
int eventOrderId = _broker.GetNextEventOrderId();
foreach ( TrackingChannelWrapper wrapper in _channels )
{
//
// Create a record for each tracking channel
// Each channel gets a distinct record because extract data will almost always be different.
ActivityTrackingRecord record = new ActivityTrackingRecord( activity.GetType(), activity.QualifiedName, contextGuid, parentContextGuid, activity.ExecutionStatus, dt, eventOrderId, null );
bool extracted = wrapper.GetTrackingProfile(exec).TryTrackActivityEvent(activity, activity.ExecutionStatus, exec, record);
//
// Only send the record to the channel if the profile indicates that it is interested
// This doesn't mean that the Body will always have data in it,
// it may be an empty extraction (just header info)
if (extracted)
wrapper.TrackingChannel.Send(record);
}
}
internal void UserTrackPoint( object sender, WorkflowExecutor.UserTrackPointEventArgs e )
{
if ( !typeof( WorkflowExecutor ).IsInstanceOfType( sender ) )
throw new ArgumentException( "sender is not WorkflowExecutor" );
WorkflowExecutor exec = ( WorkflowExecutor ) sender;
Activity activity = e.Activity;
DateTime dt = DateTime.UtcNow;
int eventOrderId = _broker.GetNextEventOrderId();
Guid parentContextGuid, contextGuid;
GetContext(activity, exec, out contextGuid, out parentContextGuid);
foreach ( TrackingChannelWrapper wrapper in _channels )
{
UserTrackingRecord record = new UserTrackingRecord( activity.GetType(), activity.QualifiedName, contextGuid, parentContextGuid, dt, eventOrderId, e.Key, e.Args );
if (wrapper.GetTrackingProfile(exec).TryTrackUserEvent(activity, e.Key, e.Args, exec, record))
wrapper.TrackingChannel.Send( record );
}
}
internal void WorkflowExecutionEvent( object sender, WorkflowExecutor.WorkflowExecutionEventArgs e )
{
if ( null == sender )
throw new ArgumentNullException( "sender" );
WorkflowExecutor exec = sender as WorkflowExecutor;
if ( null == exec )
throw new ArgumentException( ExecutionStringManager.InvalidSenderWorkflowExecutor );
//
// Many events are mapped "forward" and sent to tracking services
// (Persisting->Persisted, SchedulerEmpty->Idle)
// This is so that a batch is always available when a tracking service gets an event.
// Without this tracking data could be inconsistent with the state of the instance.
switch ( e.EventType )
{
case WorkflowEventInternal.Creating:
NotifyChannels( TrackingWorkflowEvent.Created, e, exec );
return;
case WorkflowEventInternal.Starting:
NotifyChannels(TrackingWorkflowEvent.Started, e, exec);
return;
case WorkflowEventInternal.Suspending:
NotifyChannels(TrackingWorkflowEvent.Suspended, e, exec);
return;
case WorkflowEventInternal.Resuming:
NotifyChannels( TrackingWorkflowEvent.Resumed, e, exec );
return;
case WorkflowEventInternal.Persisting:
NotifyChannels( TrackingWorkflowEvent.Persisted, e, exec );
return;
case WorkflowEventInternal.Unloading:
NotifyChannels( TrackingWorkflowEvent.Unloaded, e, exec );
return;
case WorkflowEventInternal.Loading:
NotifyChannels( TrackingWorkflowEvent.Loaded, e, exec );
return;
case WorkflowEventInternal.Completing:
NotifyChannels(TrackingWorkflowEvent.Completed, e, exec);
NotifyChannelsOfCompletionOrTermination();
return;
case WorkflowEventInternal.Aborting:
NotifyChannels( TrackingWorkflowEvent.Aborted, e, exec );
return;
case WorkflowEventInternal.Terminating:
NotifyChannels( TrackingWorkflowEvent.Terminated, e, exec );
NotifyChannelsOfCompletionOrTermination();
return;
case WorkflowEventInternal.Exception:
NotifyChannels( TrackingWorkflowEvent.Exception, e, exec );
return;
case WorkflowEventInternal.SchedulerEmpty:
NotifyChannels( TrackingWorkflowEvent.Idle, e, exec );
return;
case WorkflowEventInternal.UserTrackPoint:
UserTrackPoint( exec, ( WorkflowExecutor.UserTrackPointEventArgs ) e );
return;
case WorkflowEventInternal.ActivityStatusChange:
ActivityStatusChange( exec, ( WorkflowExecutor.ActivityStatusChangeEventArgs ) e );
return;
case WorkflowEventInternal.DynamicChangeBegin:
DynamicUpdateBegin( exec, ( WorkflowExecutor.DynamicUpdateEventArgs ) e );
return;
case WorkflowEventInternal.DynamicChangeRollback:
DynamicUpdateRollback( exec, ( WorkflowExecutor.DynamicUpdateEventArgs ) e );
return;
case WorkflowEventInternal.DynamicChangeCommit:
DynamicUpdateCommit( exec, ( WorkflowExecutor.DynamicUpdateEventArgs ) e );
return;
default:
return;
}
}
internal void DynamicUpdateBegin( object sender, WorkflowExecutor.DynamicUpdateEventArgs e )
{
if ( null == sender )
throw new ArgumentNullException( "sender" );
if ( !typeof( WorkflowExecutor ).IsInstanceOfType( sender ) )
throw new ArgumentException( "sender" );
WorkflowExecutor exec = ( WorkflowExecutor ) sender;
//
// WorkflowChangeEventArgs may be null or the WorkflowChanges may be null or empty
// If so there's no work to do here
if ( null == e.ChangeActions )
return;
//
// Clone the profiles to create instance specific copies (if they aren't already)
MakeProfilesPrivate( exec );
//
// Give the profiles the changes. At this point we are in a volatile state.
// Profiles must act as if the changes will succeed but roll back any internal changes if they do not.
foreach ( TrackingChannelWrapper channel in _channels )
{
channel.GetTrackingProfile( exec ).WorkflowChangeBegin( e.ChangeActions );
}
}
internal void DynamicUpdateRollback( object sender, WorkflowExecutor.DynamicUpdateEventArgs e )
{
if ( null == sender )
throw new ArgumentNullException( "sender" );
if ( !typeof( WorkflowExecutor ).IsInstanceOfType( sender ) )
throw new ArgumentException( "sender" );
WorkflowExecutor exec = ( WorkflowExecutor ) sender;
foreach ( TrackingChannelWrapper channel in _channels )
{
channel.GetTrackingProfile( exec ).WorkflowChangeRollback();
}
}
internal void DynamicUpdateCommit( object sender, WorkflowExecutor.DynamicUpdateEventArgs e )
{
if ( null == sender )
throw new ArgumentNullException( "sender" );
if ( !typeof( WorkflowExecutor ).IsInstanceOfType( sender ) )
throw new ArgumentException( "sender" );
WorkflowExecutor exec = ( WorkflowExecutor ) sender;
DateTime dt = DateTime.UtcNow;
foreach ( TrackingChannelWrapper channel in _channels )
{
channel.GetTrackingProfile( exec ).WorkflowChangeCommit();
}
//
// Notify tracking channels of changes
int eventOrderId = _broker.GetNextEventOrderId();
foreach ( TrackingChannelWrapper wrapper in _channels )
{
WorkflowTrackingRecord rec = new WorkflowTrackingRecord( TrackingWorkflowEvent.Changed, dt, eventOrderId, new TrackingWorkflowChangedEventArgs( e.ChangeActions, exec.WorkflowDefinition ) );
if ( wrapper.GetTrackingProfile( exec ).TryTrackInstanceEvent( TrackingWorkflowEvent.Changed, rec ) )
wrapper.TrackingChannel.Send( rec );
}
}
#endregion Event Handlers
#region Private Methods
private void NotifyChannels(TrackingWorkflowEvent evt, WorkflowExecutor.WorkflowExecutionEventArgs e, WorkflowExecutor exec)
{
DateTime dt = DateTime.UtcNow;
int eventOrderId = _broker.GetNextEventOrderId();
foreach ( TrackingChannelWrapper wrapper in _channels )
{
EventArgs args = null;
switch (evt)
{
case TrackingWorkflowEvent.Suspended:
args = new TrackingWorkflowSuspendedEventArgs(((WorkflowExecutor.WorkflowExecutionSuspendingEventArgs)e).Error);
break;
case TrackingWorkflowEvent.Terminated:
WorkflowExecutor.WorkflowExecutionTerminatingEventArgs wtea = ( WorkflowExecutor.WorkflowExecutionTerminatingEventArgs ) e;
if ( null != wtea.Exception )
args = new TrackingWorkflowTerminatedEventArgs( wtea.Exception );
else
args = new TrackingWorkflowTerminatedEventArgs( wtea.Error );
break;
case TrackingWorkflowEvent.Exception:
WorkflowExecutor.WorkflowExecutionExceptionEventArgs weea = ( WorkflowExecutor.WorkflowExecutionExceptionEventArgs ) e;
args = new TrackingWorkflowExceptionEventArgs( weea.Exception, weea.CurrentPath, weea.OriginalPath, weea.ContextGuid, weea.ParentContextGuid );
break;
}
WorkflowTrackingRecord rec = new WorkflowTrackingRecord( evt, dt, eventOrderId, args );
if ( wrapper.GetTrackingProfile( exec ).TryTrackInstanceEvent( evt, rec ) )
wrapper.TrackingChannel.Send( rec );
}
}
private void NotifyChannelsOfCompletionOrTermination()
{
foreach ( TrackingChannelWrapper wrapper in _channels )
wrapper.TrackingChannel.InstanceCompletedOrTerminated();
}
private void GetContext( Activity activity, WorkflowExecutor exec, out Guid contextGuid, out Guid parentContextGuid )
{
contextGuid = _factory.GetContext(activity);
if (null != activity.Parent)
parentContextGuid = _factory.GetContext(activity.Parent);
else
parentContextGuid = contextGuid;
Debug.Assert( contextGuid != Guid.Empty, "TrackingContext is empty" );
Debug.Assert( parentContextGuid != Guid.Empty, "Parent TrackingContext is empty" );
}
///
/// Clone all profiles to create private versions in order to hold subscriptions for dynamic changes
///
private void MakeProfilesPrivate( WorkflowExecutor exec )
{
foreach ( TrackingChannelWrapper channel in _channels )
{
channel.MakeProfilePrivate( exec );
_broker.MakeProfilePrivate( channel.TrackingServiceType );
}
}
///
/// Determine if subscriptions are needed
///
/// Activity for which to check subscription needs
///
/// This is a lightweight class that is serialized so that the TrackingListener doesn't have to be.
/// Every subscription that the listener adds holds a reference to this class.
/// When an instance is loaded the broker is given to the listener factory and the listener factory
/// gives the broker the new listener. This saves us from having to persist the listener itself which
/// means that while we do need to persist a list of service types and their profile version we don't
/// have to persist the channels themselves (and we can't control how heavy channels get as they are host defined).
///
[Serializable]
internal class TrackingListenerBroker : System.Runtime.Serialization.ISerializable
{
[NonSerialized]
private TrackingListener _listener = null;
private int _eventOrderId = 0;
private Dictionary _services = new Dictionary();
internal TrackingListenerBroker()
{
}
internal TrackingListenerBroker(TrackingListener listener)
{
_listener = listener;
}
internal TrackingListener TrackingListener
{
//
// FxCops minbar complains because this isn't used.
// The Setter is required; seems weird not to have a getter.
//get { return _listener; }
set { _listener = value; }
}
internal bool ContainsService( Type trackingServiceType )
{
return _services.ContainsKey( HashHelper.HashServiceType( trackingServiceType ) );
}
internal void AddService( Type trackingServiceType, Version profileVersionId )
{
_services.Add( HashHelper.HashServiceType( trackingServiceType ), new ServiceProfileContainer( profileVersionId ) );
}
internal void ReplaceServices(Dictionary replacements)
{
if (replacements != null && replacements.Count > 0)
{
ServiceProfileContainer item;
foreach (KeyValuePair replacement in replacements)
{
Guid previous = HashHelper.HashServiceType(replacement.Key);
if (_services.TryGetValue(previous, out item))
{
_services.Remove(previous);
Guid current = HashHelper.HashServiceType(replacement.Value);
if (!_services.ContainsKey(current))
{
_services.Add(current, item);
}
}
}
}
}
internal void RemoveService(Type trackingServiceType)
{
_services.Remove( HashHelper.HashServiceType( trackingServiceType ) );
}
internal bool TryGetProfileVersionId( Type trackingServiceType, out Version profileVersionId )
{
profileVersionId = new Version( 0, 0 );
ServiceProfileContainer service = null;
if ( _services.TryGetValue( HashHelper.HashServiceType( trackingServiceType ), out service ) )
{
profileVersionId = service.ProfileVersionId;
return true;
}
return false;
}
internal void MakeProfilePrivate( Type trackingServiceType )
{
ServiceProfileContainer service = null;
if ( !_services.TryGetValue( HashHelper.HashServiceType( trackingServiceType ), out service))
throw new ArgumentException( ExecutionStringManager.InvalidTrackingService );
service.IsPrivate = true;
}
internal bool IsProfilePrivate( Type trackingServiceType )
{
ServiceProfileContainer service = null;
if ( !_services.TryGetValue( HashHelper.HashServiceType( trackingServiceType ), out service ) )
throw new ArgumentException( ExecutionStringManager.InvalidTrackingService );
return service.IsPrivate;
}
internal void MakeProfileInstance( Type trackingServiceType )
{
ServiceProfileContainer service = null;
if ( !_services.TryGetValue( HashHelper.HashServiceType( trackingServiceType ), out service ) )
throw new ArgumentException( ExecutionStringManager.InvalidTrackingService );
//
// Can't be instance without being private
service.IsPrivate = true;
service.IsInstance = true;
}
internal bool IsProfileInstance( Type trackingServiceType )
{
ServiceProfileContainer service = null;
if ( !_services.TryGetValue( HashHelper.HashServiceType( trackingServiceType ), out service ) )
throw new ArgumentException( ExecutionStringManager.InvalidTrackingService );
return service.IsInstance;
}
internal int GetNextEventOrderId()
{
checked
{
return ++_eventOrderId;
}
}
[Serializable]
internal class ServiceProfileContainer
{
Version _profileVersionId = new Version( 0, 0 );
bool _isPrivate = false;
bool _isInstance = false;
protected ServiceProfileContainer() { }
internal ServiceProfileContainer( Version profileVersionId )
{
_profileVersionId = profileVersionId;
}
internal Version ProfileVersionId
{
get { return _profileVersionId; }
}
internal bool IsPrivate
{
get { return _isPrivate; }
set { _isPrivate = value; }
}
internal bool IsInstance
{
get { return _isInstance; }
set { _isInstance = value; }
}
}
#region ISerializable Members
[SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter = true)]
public void GetObjectData(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context)
{
info.AddValue("eventOrderId", this._eventOrderId);
info.AddValue("services", this._services.Count == 0 ? null : this._services);
}
private TrackingListenerBroker(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context)
{
this._eventOrderId = info.GetInt32("eventOrderId");
this._services = (Dictionary)info.GetValue("services", typeof(Dictionary));
if(this._services == null)
this._services = new Dictionary();
}
#endregion
}
///
/// Manages profile requests, caching profiles and creating RTTrackingProfile instances.
///
internal class TrackingProfileManager
{
//
// This is a dictionary keyed by tracking service type
// that returns a dictionary that is key by schedule type
// that returns a Set of profile versions for that schedule type
// The set is constrained by VersionId
private Dictionary> _cacheLookup;
//
// Protects _cacheLookup
private object _cacheLock = new object();
//
// Values assigned in Initialize
private bool _init = false;
private List _services = null;
private WorkflowRuntime _runtime = null;
internal TrackingProfileManager()
{
}
///
/// Clears all entries from the cache by reinitializing the member
///
public static void ClearCache()
{
WorkflowRuntime.ClearTrackingProfileCache();
}
internal void ClearCacheImpl()
{
lock (_cacheLock)
{
_cacheLookup = new Dictionary>();
}
}
///
/// Create static state
///
///
internal void Initialize(WorkflowRuntime runtime)
{
lock ( _cacheLock )
{
if (null == runtime)
throw new ArgumentException( ExecutionStringManager.NullEngine );
_runtime = runtime;
//
// Initialize the cache
// Do this every time the runtime starts/stops to make life easier
// for IProfileNotification tracking services that might have updated
// profiles while we were stopped - we'll go get new versions since nothing is cached
// without them having to fire updated events.
_cacheLookup = new Dictionary>();
if (null != runtime.TrackingServices)
{
_services = runtime.TrackingServices;
foreach ( TrackingService service in _services )
{
if ( service is IProfileNotification )
{
( ( IProfileNotification ) service ).ProfileUpdated += new EventHandler( ProfileUpdated );
( ( IProfileNotification ) service ).ProfileRemoved += new EventHandler( ProfileRemoved );
}
}
}
_init = true;
}
}
///
/// Clean up static state
///
internal void Uninitialize()
{
lock ( _cacheLock )
{
if (null != _runtime)
{
foreach ( TrackingService service in _services )
{
if ( service is IProfileNotification )
{
( ( IProfileNotification ) service ).ProfileUpdated -= new EventHandler( ProfileUpdated );
( ( IProfileNotification ) service ).ProfileRemoved -= new EventHandler( ProfileRemoved );
}
}
}
_runtime = null;
_services = null;
_init = false;
}
}
///
/// Retrieves the current version of a profile from the specified service
///
internal RTTrackingProfile GetProfile(TrackingService service, Activity schedule)
{
if ( !_init )
throw new ApplicationException( ExecutionStringManager.TrackingProfileManagerNotInitialized );
if ( ( null == service ) || ( null == schedule ) )
{
WorkflowTrace.Tracking.TraceEvent( TraceEventType.Error, 0, ExecutionStringManager.NullParameters );
return null;
}
Type workflowType = schedule.GetType();
RTTrackingProfile tp = null;
if ( service is IProfileNotification )
{
//
// If we found the profile in the cache return it, it may be null, this is OK
// (no profile for this service type/schedule type combination)
if ( TryGetFromCache( service.GetType(), workflowType, out tp ) )
return tp;
}
//
// Either we don't have anything in the cache for this schedule/service combination
// or this is a base TrackingService that doesn't notify of profile updates
// Get the profile from the service
TrackingProfile profile = null;
if ( !service.TryGetProfile( workflowType, out profile ) )
{
//
// No profile for this schedule from this service
// RemoveProfile will just mark this service/schedule as not currently having a profile in the cache
RemoveProfile( workflowType, service.GetType() );
return null;
}
//
// Check the cache to see if we already have this version
// For TrackingService types this is necessary.
// For IProfileNotification types this is a bit redundant
// but another threadcould have inserted the profile into the cache
// so check again before acquiring the writer lock
if ( TryGetFromCache( service.GetType(), workflowType, profile.Version, out tp ) )
return tp;
//
// No profile, create it
string xaml = schedule.GetValue(Activity.WorkflowXamlMarkupProperty) as string;
if (null != xaml && xaml.Length > 0)
{
//
// Never add xaml only workflows to the cache
// Each one must be handled distinctly
return CreateProfile(profile, schedule, service.GetType());
}
else
{
tp = CreateProfile(profile, workflowType, service.GetType());
}
lock (_cacheLock)
{
//
// Recheck the cache with exclusive access
RTTrackingProfile tmp = null;
if (TryGetFromCache(service.GetType(), workflowType, profile.Version, out tmp))
return tmp;
//
// Add it to the cache
if (!AddToCache(tp, service.GetType()))
throw new ApplicationException(ExecutionStringManager.ProfileCacheInsertFailure);
return tp;
}
}
///
/// Retrieves the specified version of a profile from the specified service
///
internal RTTrackingProfile GetProfile(TrackingService service, Activity workflow, Version versionId)
{
if ( null == service )
throw new ArgumentNullException( "service" );
if ( null == workflow )
throw new ArgumentNullException( "workflow" );
if ( !_init )
throw new InvalidOperationException( ExecutionStringManager.TrackingProfileManagerNotInitialized );
Type workflowType = workflow.GetType();
RTTrackingProfile tp = null;
//
// Looking for a specific version, see if it is in the cache
if ( TryGetFromCache( service.GetType(), workflowType, versionId, out tp ) )
return tp;
TrackingProfile profile = service.GetProfile(workflowType, versionId);
//
// No profile, create it
string xaml = workflow.GetValue(Activity.WorkflowXamlMarkupProperty) as string;
if (null != xaml && xaml.Length > 0)
{
//
// Never add xaml only workflows to the cache
// Each one must be handled distinctly
return CreateProfile(profile, workflow, service.GetType());
}
else
{
tp = CreateProfile(profile, workflowType, service.GetType());
}
lock (_cacheLock)
{
//
// Recheck the cache with exclusive access
RTTrackingProfile tmp = null;
if (TryGetFromCache(service.GetType(), workflowType, versionId, out tmp))
return tmp;
//
// Add it to the cache
if (!AddToCache(tp, service.GetType()))
throw new ApplicationException(ExecutionStringManager.ProfileCacheInsertFailure);
return tp;
}
}
internal RTTrackingProfile GetProfile(TrackingService service, Activity workflow, Guid instanceId)
{
//
// An instance based profile will never be in the cache
TrackingProfile profile = service.GetProfile( instanceId );
if ( null == profile )
return null;
return new RTTrackingProfile( profile, workflow, service.GetType() );
}
#region Private Methods
private RTTrackingProfile CreateProfile( TrackingProfile profile, Type workflowType, Type serviceType )
{
//
// Can't use the activity definition that we have here, it may have been updated
// Get the base definition and use it to create the profile.
Activity tmpSchedule = _runtime.GetWorkflowDefinition(workflowType);
return new RTTrackingProfile( profile, tmpSchedule, serviceType );
}
private RTTrackingProfile CreateProfile(TrackingProfile profile, Activity schedule, Type serviceType)
{
//
// This is called for Xaml only workflows
return new RTTrackingProfile(profile, schedule, serviceType);
}
///
/// Add a profile to the cache but do not reset the NoProfiles flag for the schedule type
///
/// RTTrackingProfile to add
/// TrackingService type
/// True if the profile was successfully added; false if not
private bool AddToCache( RTTrackingProfile profile, Type serviceType )
{
return AddToCache( profile, serviceType, false );
}
///
/// Adds a profile to the cache and optionally resets the NoProfiles flag for the schedule type
///
/// RTTrackingProfile to add
/// TrackingService type
/// true will reset NoProfiles (to false); false will leave NoProfiles as is
/// True if the profile was successfully added; false if not
private bool AddToCache( RTTrackingProfile profile, Type serviceType, bool resetNoProfiles )
{
//
// Profile may be null, serviceType may not
if ( null == serviceType )
return false;
lock(_cacheLock)
{
Dictionary schedules = null;
//
// Get the dictionary for the service type,
// create it if it doesn't exist
if ( !_cacheLookup.TryGetValue( serviceType, out schedules ) )
{
schedules = new Dictionary();
_cacheLookup.Add( serviceType, schedules );
}
//
// The the ProfileList for the schedule type,
// create it if it doesn't exist
ProfileList profiles = null;
if ( !schedules.TryGetValue( profile.WorkflowType, out profiles ) )
{
profiles = new ProfileList();
schedules.Add( profile.WorkflowType, profiles );
}
if ( resetNoProfiles )
profiles.NoProfile = false;
return profiles.Profiles.TryAdd( new CacheItem( profile ) );
}
}
///
/// Gets a profile from the cache
///
private bool TryGetFromCache( Type serviceType, Type workflowType, out RTTrackingProfile profile )
{
return TryGetFromCache( serviceType, workflowType, new Version( 0, 0 ), out profile ); // 0 is an internal signal to get the most current
}
///
/// Gets a profile from the cache
///
private bool TryGetFromCache( Type serviceType, Type workflowType, Version versionId, out RTTrackingProfile profile )
{
profile = null;
CacheItem item = null;
lock(_cacheLock)
{
Dictionary schedules = null;
if ( !_cacheLookup.TryGetValue( serviceType, out schedules ) )
return false;
ProfileList profiles = null;
if ( !schedules.TryGetValue( workflowType, out profiles ) )
return false;
//
// 0 means get the current version
if ( 0 == versionId.Major )
{
//
// Currently the schedule type doesn't have a profile associated to it
if ( profiles.NoProfile )
return true;
if ( ( null == profiles.Profiles ) || ( 0 == profiles.Profiles.Count ) )
return false;
//
// Current version is highest versionId
// which means it is at the end of the Set
int endPos = profiles.Profiles.Count-1;
if ( null == profiles.Profiles[endPos] )
return false;
profile = profiles.Profiles[endPos].TrackingProfile;
return true;
}
else
{
if ( ( null == profiles.Profiles ) || ( 0 == profiles.Profiles.Count ) )
return false;
if ( profiles.Profiles.TryGetValue( new CacheItem( workflowType, versionId ), out item ) )
{
profile = item.TrackingProfile;
return true;
}
else
return false;
}
}
}
#endregion
#region Event Handlers
///
/// Listens on ProfileUpdated events from IProfileNotification services
///
/// Type of the tracking service sending the update
/// ProfileUpdatedEventArgs containing the new profile and the schedule type
private void ProfileUpdated( object sender, ProfileUpdatedEventArgs e )
{
if ( null == sender )
throw new ArgumentNullException( "sender" );
Type t = sender.GetType();
if ( null == e.WorkflowType )
throw new ArgumentNullException( "e" );
if ( null == e.TrackingProfile )
{
RemoveProfile( e.WorkflowType, t );
return;
}
RTTrackingProfile profile = CreateProfile( e.TrackingProfile, e.WorkflowType, t );
//
// If AddToCache fails this version is already in the cache and we don't care
AddToCache( profile, t, true );
}
private void ProfileRemoved( object sender, ProfileRemovedEventArgs e )
{
if ( null == sender )
throw new ArgumentNullException( "sender" );
if ( null == e.WorkflowType )
throw new ArgumentNullException( "e" );
RemoveProfile( e.WorkflowType, sender.GetType() );
}
private void RemoveProfile( Type workflowType, Type serviceType )
{
lock(_cacheLock)
{
Dictionary schedules = null;
if ( !_cacheLookup.TryGetValue( serviceType, out schedules ) )
{
schedules = new Dictionary();
_cacheLookup.Add( serviceType, schedules );
}
ProfileList profiles = null;
if ( !schedules.TryGetValue( workflowType, out profiles ) )
{
profiles = new ProfileList();
schedules.Add( workflowType, profiles );
}
//
// Finally indicate that there isn't a profile for this schedule type
// Calling UpdateProfile for this type will result in resetting this field
// regardless of whether the version of the profile passed is in the cache or not
profiles.NoProfile = true;
}
}
#endregion
#region Private Classes
private class ProfileList
{
internal bool NoProfile = false;
internal Set Profiles = new Set( 5 );
}
private class CacheItem : IComparable
{
internal RTTrackingProfile TrackingProfile = null;
internal DateTime LastAccess = DateTime.UtcNow;
//
// VersionId and ScheduleType are stored separately from the profile so that they
// can be used to identify the profile if it has been pushed from the cache.
internal Version VersionId = new Version( 0, 0 );
internal Type ScheduleType = null;
internal CacheItem()
{
}
internal CacheItem( RTTrackingProfile profile )
{
if ( null == profile )
throw new ArgumentNullException( "profile" );
ScheduleType = profile.WorkflowType;
this.TrackingProfile = profile;
VersionId = profile.Version;
}
internal CacheItem( Type workflowType, Version versionId )
{
VersionId = versionId;
ScheduleType = workflowType;
}
#region IComparable Members
public int CompareTo( object obj )
{
if ( !( obj is CacheItem ) )
throw new ArgumentException( ExecutionStringManager.InvalidCacheItem );
CacheItem item = ( CacheItem ) obj;
if ( ( VersionId == item.VersionId ) && ( ScheduleType == item.ScheduleType ) )
return 0;
else
return ( VersionId > item.VersionId ) ? 1 : -1;
}
#endregion
}
#endregion
}
///
/// Represents a wrapper around a channel and its artifacts, such as its tracking service type and profile
///
internal class TrackingChannelWrapper
{
private Type _serviceType = null, _scheduleType = null;
private TrackingChannel _channel = null;
[NonSerialized]
private RTTrackingProfile _profile = null;
private Version _profileVersionId;
private TrackingChannelWrapper(){}
public TrackingChannelWrapper( TrackingChannel channel, Type serviceType, Type workflowType, RTTrackingProfile profile )
{
_serviceType = serviceType;
_scheduleType = workflowType;
_channel = channel;
_profile = profile;
_profileVersionId = profile.Version;
}
internal Type TrackingServiceType
{
get{ return _serviceType; }
}
internal TrackingChannel TrackingChannel
{
get{ return _channel; }
}
///
/// Get the tracking profile for the channel
///
/// BaseExecutor
/// RTTrackingProfile
internal RTTrackingProfile GetTrackingProfile(WorkflowExecutor skedExec)
{
if ( null != _profile )
return _profile;
else
throw new InvalidOperationException(String.Format(System.Globalization.CultureInfo.CurrentCulture, ExecutionStringManager.NullProfileForChannel, this._scheduleType.AssemblyQualifiedName));
}
internal void SetTrackingProfile( RTTrackingProfile profile )
{
_profile = profile;
}
///
/// Clone the tracking profile stored in the cache and
///
///
internal void MakeProfilePrivate( WorkflowExecutor exec )
{
if ( null != _profile )
{
//
// If the profile is not already a private copy make it so
if ( !_profile.IsPrivate )
{
_profile = _profile.Clone();
_profile.IsPrivate = true;
}
}
else
{
//
// We're not holding a reference to a profile
// so get it from the cache and clone it into a private copy
RTTrackingProfile tmp = GetTrackingProfile( exec );
_profile = tmp.Clone();
_profile.IsPrivate = true;
}
}
}
internal class Set : IEnumerable where T : IComparable
{
List list = null;
public Set()
{
list = new List();
}
public Set( int capacity )
{
list = new List( capacity );
}
public int Count
{
get { return list.Count; }
}
public void Add( T item )
{
int pos = -1;
if ( !Search( item, out pos ) )
list.Insert( pos, item );
else
throw new ArgumentException( ExecutionStringManager.ItemAlreadyExist );
}
public bool TryAdd( T item )
{
int pos = -1;
if ( !Search( item, out pos ) )
{
list.Insert( pos, item );
return true;
}
else
return false;
}
public bool Contains( T item )
{
int pos = -1;
return Search( item, out pos );
}
public IEnumerator GetEnumerator()
{
return list.GetEnumerator();
}
System.Collections.IEnumerator IEnumerable.GetEnumerator()
{
return list.GetEnumerator();
}
public bool TryGetValue( T item, out T value )
{
int pos = -1;
if ( Search( item, out pos ) )
{
value = list[pos];
return true;
}
else
{
value = default( T );
return false;
}
}
public T this[ int index ]
{
get { return list[index]; }
}
private bool Search( T item, out int insertPos )
{
insertPos = -1;
int pos = 0
, high = list.Count
, low = -1
, diff = 0;
while ( high - low > 1 )
{
pos = ( high + low ) / 2;
diff = list[pos].CompareTo( item );
if ( 0 == diff )
{
insertPos = pos;
return true;
}
else if ( diff > 0 )
high = pos;
else
low = pos;
}
if ( low == -1 )
{
insertPos = 0;
return false;
}
if ( 0 != diff )
{
insertPos = ( diff < 0 ) ? pos + 1 : pos;
return false;
}
return true;
}
}
///
/// Persisted tracking State pertaining to workflow invoking for an individual schedule. There could be multiple called schedules under
/// an instance.
///
[Serializable]
internal class TrackingCallingState
{
#region data members
private IList callerActivityPathProxy;
private Guid callerInstanceId;
private Guid callerContextGuid;
private Guid callerParentContextGuid;
#endregion data members
#region Property accessors
///
/// Activity proxy of the caller/execer activity, if any
/// //@@Undone for Ashishmi: Hold on to ActivityPath Proxy in one of your class impl
///
/// CallerActivityPathProxy
{
get { return callerActivityPathProxy; }
set { callerActivityPathProxy = value; }
}
///
/// Instance ID of the caller/exec'er schedule, if any
///
///
/// Context of the caller's invoke activity
///
/// int
public Guid CallerContextGuid
{
get { return callerContextGuid; }
set { callerContextGuid = value; }
}
///
/// ParentContext of the caller's invoke activity
///
/// int
public Guid CallerParentContextGuid
{
get { return callerParentContextGuid; }
set { callerParentContextGuid = value; }
}
#endregion Property accessors
}
internal static class HashHelper
{
internal static Guid HashServiceType(Type serviceType)
{
return HashServiceType(serviceType.AssemblyQualifiedName);
}
internal static Guid HashServiceType(String serviceFullTypeName)
{
MD5 md5 = new MD5CryptoServiceProvider();
byte[] data;
byte[] result;
UnicodeEncoding ue = new UnicodeEncoding();
data = ue.GetBytes(serviceFullTypeName);
result = md5.ComputeHash(data);
return new Guid(result);
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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