| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| namespace Apache.Ignite.Core.Impl.Common |
| { |
| using System; |
| using System.Collections.Generic; |
| using System.Diagnostics; |
| using System.Diagnostics.CodeAnalysis; |
| using System.Reflection; |
| |
| /// <summary> |
| /// Resolves loaded assemblies by name. |
| /// </summary> |
| // ReSharper disable once ClassNeverInstantiated.Global |
| internal class LoadedAssembliesResolver |
| { |
| // The lazy singleton instance. |
| private static readonly Lazy<LoadedAssembliesResolver> LazyInstance = |
| new Lazy<LoadedAssembliesResolver>(() => new LoadedAssembliesResolver()); |
| |
| // Assemblies map. |
| private volatile Dictionary<string, Assembly> _map; |
| |
| /// <summary> |
| /// Initializes a new instance of the <see cref="LoadedAssembliesResolver"/> class. |
| /// </summary> |
| private LoadedAssembliesResolver() |
| { |
| lock (this) |
| { |
| AppDomain.CurrentDomain.AssemblyLoad += CurrentDomain_AssemblyLoad; |
| |
| UpdateMap(); |
| } |
| } |
| |
| /// <summary> |
| /// Handles the AssemblyLoad event of the AppDomain. |
| /// </summary> |
| /// <param name="sender">The source of the event.</param> |
| /// <param name="args">The <see cref="AssemblyLoadEventArgs"/> instance containing the event data.</param> |
| private void CurrentDomain_AssemblyLoad(object sender, AssemblyLoadEventArgs args) |
| { |
| lock (this) |
| { |
| UpdateMap(); |
| } |
| } |
| |
| /// <summary> |
| /// Updates the assembly map according to the current list of loaded assemblies. |
| /// </summary> |
| private void UpdateMap() |
| { |
| var assemblies = AppDomain.CurrentDomain.GetAssemblies(); |
| |
| _map = new Dictionary<string, Assembly>(assemblies.Length); |
| |
| foreach (var assembly in assemblies) |
| _map[assembly.FullName] = assembly; |
| } |
| |
| /// <summary> |
| /// Gets the singleton instance. |
| /// </summary> |
| public static LoadedAssembliesResolver Instance |
| { |
| get { return LazyInstance.Value; } |
| } |
| |
| /// <summary> |
| /// Gets the assembly by name. |
| /// </summary> |
| /// <param name="assemblyName">Name of the assembly.</param> |
| /// <returns>Assembly with specified name, or null.</returns> |
| [SuppressMessage("ReSharper", "InconsistentlySynchronizedField")] |
| public Assembly GetAssembly(string assemblyName) |
| { |
| Debug.Assert(!string.IsNullOrWhiteSpace(assemblyName)); |
| |
| Assembly asm; |
| |
| return _map.TryGetValue(assemblyName, out asm) ? asm : null; |
| } |
| } |
| } |