101 lines
3.7 KiB
C#
101 lines
3.7 KiB
C#
//----------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//----------------------------------------------------------------
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namespace System.Activities.Debugger
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{
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using System;
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using System.Activities.Hosting;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq.Expressions;
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using System.Runtime;
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using System.Activities.Validation;
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// DebugController, one is needed per ActivityExecutor.
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[DebuggerNonUserCode]
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class DebugController
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{
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WorkflowInstance host;
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DebugManager debugManager; // Instantiated after first instrumentation is successful.
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public DebugController(WorkflowInstance host)
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{
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this.host = host;
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}
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public void WorkflowStarted()
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{
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}
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public void WorkflowCompleted()
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{
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if (this.debugManager != null)
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{
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this.debugManager.Exit();
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this.debugManager = null;
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}
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}
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public void ActivityStarted(ActivityInstance activityInstance)
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{
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if (!(activityInstance.Activity.RootActivity is Constraint)) // Don't debug an activity in a Constraint
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{
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EnsureActivityInstrumented(activityInstance, false);
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this.debugManager.OnEnterState(activityInstance);
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}
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}
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public void ActivityCompleted(ActivityInstance activityInstance)
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{
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if (!(activityInstance.Activity.RootActivity is Constraint)) // Don't debug an activity in a Constraint
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{
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EnsureActivityInstrumented(activityInstance, true);
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this.debugManager.OnLeaveState(activityInstance);
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}
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}
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// Lazy instrumentation.
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// Parameter primeCurrentInstance specify whether priming (if needed) is done
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// up to the current instance. Set this to true when calling this from an "...Completed"
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// (exit state).
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void EnsureActivityInstrumented(ActivityInstance instance, bool primeCurrentInstance)
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{
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if (this.debugManager == null)
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{ // Workflow has not been instrumented yet.
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// Finding rootInstance and check all referred sources.
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Stack<ActivityInstance> ancestors = new Stack<ActivityInstance>();
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while (instance.Parent != null)
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{
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ancestors.Push(instance);
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instance = instance.Parent;
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}
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Activity rootActivity = instance.Activity;
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// Do breakOnStartup only if debugger is attached from the beginning, i.e. no priming needed.
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// This specified by change the last parameter below to: "(ancestors.Count == 0)".
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this.debugManager = new DebugManager(rootActivity, "Workflow", "Workflow", "DebuggerThread", false, this.host, ancestors.Count == 0);
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if (ancestors.Count > 0)
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{
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// Priming the background thread
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this.debugManager.IsPriming = true;
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while (ancestors.Count > 0)
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{
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ActivityInstance ancestorInstance = ancestors.Pop();
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this.debugManager.OnEnterState(ancestorInstance);
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}
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if (primeCurrentInstance)
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{
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this.debugManager.OnEnterState(instance);
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}
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this.debugManager.IsPriming = false;
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}
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}
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}
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}
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}
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