# HG changeset patch
# User cin
# Date 2016-02-11 21:59:29
# Node ID b933ec88446e3ae9fad132e74cee95d02286086e
# Parent  240aa6994018bec83878f130daa91e23dece8b1a

docs

diff --git a/Implab/Components/App.cs b/Implab/Components/App.cs
--- a/Implab/Components/App.cs
+++ b/Implab/Components/App.cs
@@ -8,12 +8,17 @@ namespace Implab.Components {
     public static class App {
         readonly static ComponentContainer<object> _root = new ComponentContainer<object>();
 
+        /// <summary>
+        /// The container for application level components.
+        /// </summary>
+        /// <remarks>Pools of disposable objects can be placed here and they will be automatically
+        /// disposed when application domain is unloaded.</remarks>
         public static ICollection<object> RootContainer {
             get { return _root; }
         }
 
         static App() {
-            AppDomain.CurrentDomain.ProcessExit += (sender, e) => _root.Dispose();
+            AppDomain.CurrentDomain.DomainUnload += (sender, e) => _root.Dispose();
         }
     }
 }
diff --git a/Implab/Components/ComponentContainer.cs b/Implab/Components/ComponentContainer.cs
--- a/Implab/Components/ComponentContainer.cs
+++ b/Implab/Components/ComponentContainer.cs
@@ -4,12 +4,18 @@ using System.Linq;
 
 namespace Implab.Components {
     /// <summary>
-    /// Component container.
+    /// Component container, used to store track components in multi-threaded environmment.
     /// </summary>
     /// <remarks>Instanses of this class are thread safe.</remarks>
     public class ComponentContainer<T> : Disposable, ICollection<T> {
         readonly HashSet<T> m_components = new HashSet<T>();
 
+        /// <summary>
+        /// Removes currently stored compoenents from the container and disposes them if possible.
+        /// </summary>
+        /// <remarks>
+        /// A new components may be added before this method completes.
+        /// </remarks>
         public void Clear() {
             T[] removed;
 
@@ -23,21 +29,37 @@ namespace Implab.Components {
                 item.Dispose();
         }
 
+        /// <summary>
+        /// Checks whether the specified item in the collection.
+        /// </summary>
+        /// <param name="item">The item to check.</param>
         public bool Contains(T item) {
             lock (m_components)
                 return m_components.Contains(item);
         }
 
+        /// <summary>
+        /// Copies currently stored components to the specified array.
+        /// </summary>
+        /// <param name="array">A destination array for components.</param>
+        /// <param name="arrayIndex">A starting index in the destination array.</param>
         public void CopyTo(T[] array, int arrayIndex) {
             lock (m_components)
                 m_components.CopyTo(array, arrayIndex);
         }
 
+        /// <summary>
+        /// Remove the specified item from the collection.
+        /// </summary>
+        /// <param name="item">The item to remove.</param>
         public bool Remove(T item) {
             lock (m_components)
                 return m_components.Remove(item);
         }
 
+        /// <summary>
+        /// Gets the count of components in the collection.
+        /// </summary>
         public int Count {
             get {
                 lock (m_components)
@@ -45,12 +67,22 @@ namespace Implab.Components {
             }
         }
 
+        /// <summary>
+        /// Gets a value indicating whether this instance is read only.
+        /// </summary>
+        /// <remarks>
+        /// Always false.
+        /// </remarks>
         public bool IsReadOnly {
             get {
                 return false;
             }
         }
 
+        /// <summary>
+        /// Gets the enumerator for components in the collection.
+        /// </summary>
+        /// <returns>The enumerator.</returns>
         public IEnumerator<T> GetEnumerator() {
             T[] items;
             lock (m_components) {
@@ -64,6 +96,13 @@ namespace Implab.Components {
             return GetEnumerator();
         }
 
+        /// <summary>
+        /// Add the specified item to the collection.
+        /// </summary>
+        /// <param name="item">The item to add.</param>
+        /// <remarks>
+        /// If the collection is alredy disposed, the item isn't added to the collection and disposed if possible.
+        /// </remarks>
         public void Add(T item) {
             Safe.ArgumentNotNull(item, "item");
 
@@ -75,6 +114,10 @@ namespace Implab.Components {
             }
         }
 
+        /// <summary>
+        /// Disposes the components stored in the collection.
+        /// </summary>
+        /// <param name="disposing">If set to <c>true</c> the collection is disposing.</param>
         protected override void Dispose(bool disposing) {
             base.Dispose(disposing);
             Clear();
diff --git a/Implab/Components/DisposablePool.cs b/Implab/Components/DisposablePool.cs
--- a/Implab/Components/DisposablePool.cs
+++ b/Implab/Components/DisposablePool.cs
@@ -4,7 +4,16 @@ using System.Threading;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 
-namespace Implab {
+namespace Implab.Components {
+    /// <summary>
+    /// The base class for implementing pools of disposable objects.
+    /// </summary>
+    /// <remarks>
+    /// <para>This class maintains a set of pre-created objects and which are frequently allocated and released
+    /// by clients. The pool maintains maximum number of unsued object, any object above this limit is disposed,
+    /// if the pool is empty it will create new objects on demand.</para>
+    /// <para>Instances of this class are thread-safe.</para>
+    /// </remarks>
     public abstract class DisposablePool<T> : IDisposable {
         readonly int m_size;
         readonly AsyncQueue<T> m_queue = new AsyncQueue<T>();
@@ -62,8 +71,9 @@ namespace Implab {
                     ((IDisposable)instance).Dispose() ;
 
             } else {
-                if (instance is IDisposable)
-                    ((IDisposable)instance).Dispose();
+                var disposable = instance as IDisposable;
+                if (disposable != null)
+                    disposable.Dispose();
             }
         }
 
@@ -71,9 +81,11 @@ namespace Implab {
             if (disposing) {
                 m_disposed = true;
                 T instance;
-                while (m_queue.TryDequeue(out instance))
-                    if (instance is IDisposable)
-                        ((IDisposable)instance).Dispose();
+                while (m_queue.TryDequeue(out instance)) {
+                    var disposable = instance as IDisposable;
+                    if (disposable != null)
+                        disposable.Dispose();
+                }
             }
         }