1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections.Concurrent;
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24 | using System.Collections.Generic;
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25 | using System.IO;
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26 | using System.Linq;
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27 | using System.Reflection;
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28 | using System.Web.Http;
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29 | using System.Web.Http.Controllers;
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30 |
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31 | namespace HeuristicLab.Services.WebApp {
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32 | public class Plugin {
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33 | public string Name { get; set; }
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34 | public string Directory { get; set; }
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35 | public string AssemblyName { get; set; }
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36 | public DateTime? LastReload { get; set; }
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37 |
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38 | private HttpConfiguration configuration;
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39 | public HttpConfiguration Configuration {
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40 | get { return configuration; }
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41 | set {
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42 | if (configuration != value) {
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43 | configuration = value;
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44 | ReloadControllers();
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45 | }
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46 | }
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47 | }
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48 |
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49 | private IDictionary<string, HttpControllerDescriptor> controllers;
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50 | public IDictionary<string, HttpControllerDescriptor> Controllers {
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51 | get { return controllers ?? (controllers = new ConcurrentDictionary<string, HttpControllerDescriptor>()); }
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52 | }
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53 |
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54 | public Plugin(string name, string directory, HttpConfiguration configuration) {
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55 | Name = name;
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56 | Directory = directory;
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57 | Configuration = configuration;
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58 | }
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59 |
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60 | public HttpControllerDescriptor GetController(string name) {
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61 | HttpControllerDescriptor controller;
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62 | Controllers.TryGetValue(name, out controller);
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63 | return controller;
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64 | }
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65 |
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66 | public void ReloadControllers() {
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67 | AssemblyName = null;
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68 | Controllers.Clear();
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69 | LastReload = DateTime.Now;
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70 | if (configuration == null)
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71 | return;
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72 | try {
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73 | string searchPattern = string.Format("HeuristicLab.Services.WebApp.{0}*.dll", Name);
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74 | var assemblies = System.IO.Directory.GetFiles(Directory, searchPattern);
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75 | if (!assemblies.Any())
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76 | return;
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77 | var assemblyPath = assemblies.First();
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78 | var assembly = Assembly.Load(File.ReadAllBytes(assemblyPath));
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79 | var assemblyTypes = assembly.GetTypes();
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80 | var apiControllers = assemblyTypes.Where(c => typeof(ApiController).IsAssignableFrom(c)).ToList();
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81 | foreach (var apiController in apiControllers) {
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82 | var controllerName = apiController.Name.Remove(apiController.Name.Length - 10).ToLower();
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83 | Controllers.Add(controllerName, new HttpControllerDescriptor(configuration, controllerName, apiController));
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84 | }
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85 | AssemblyName = Path.GetFileName(assemblyPath);
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86 | }
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87 | catch (Exception) {
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88 | AssemblyName = "Error loading assembly";
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89 | Controllers.Clear();
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90 | }
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91 | }
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92 | }
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93 | } |
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