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more methods to load plugins

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This commit is contained in:
schedpas
2024-04-17 15:05:32 +02:00
parent e91e016f32
commit efb0636312
5 changed files with 110 additions and 19 deletions
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13
Pilz.Plugins.Advanced/IPluginFeatureProvider.cs Normal file
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@@ -0,0 +1,13 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Pilz.Plugins.Advanced
{
public interface IPluginFeatureProvider<T> where T : PluginFeature
{
static abstract T Instance { get; }
}
}

13
Pilz.Plugins.Advanced/IPluginFeaturesProvider.cs Normal file
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@@ -0,0 +1,13 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Pilz.Plugins.Advanced
{
public interface IPluginFeaturesProvider
{
static abstract PluginFeature[] GetFeatures();
}
}

98
Pilz.Plugins/PluginManagerT.cs
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@@ -2,6 +2,7 @@
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Reflection.Metadata.Ecma335;
using System.Text;
using System.Threading.Tasks;
@@ -9,38 +10,72 @@ namespace Pilz.Plugins
{
public class PluginManager<TPluginInterface, TPluginRuntimeInfo> where TPluginInterface : class where TPluginRuntimeInfo : PluginRuntimeInfo<TPluginInterface>
{
public IEnumerable<TPluginRuntimeInfo> LoadPlugins(string[] paths)
private readonly List<TPluginRuntimeInfo> loadedPlugins = [];
/// <summary>
/// Returns a list of all currently loaded plugins.
/// </summary>
public IEnumerable<TPluginRuntimeInfo> LoadedPlugins => loadedPlugins.AsReadOnly();
private void CurrentDomain_AssemblyLoad(object? sender, AssemblyLoadEventArgs args)
{
return LoadPlugins(paths, null);
LoadPlugin(args.LoadedAssembly);
}
/// <summary>
/// Loads assembly from the given file paths and then loads the plugins from the assemblies.
/// </summary>
/// <param name="paths"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public IEnumerable<TPluginRuntimeInfo> LoadPlugins(string[] paths, params object?[]? parameters)
{
var states = new List<TPluginRuntimeInfo>();
foreach (string path in paths)
states.Add(LoadPlugin(path));
return states;
foreach (var path in paths)
yield return LoadPlugin(path, parameters);
}
public TPluginRuntimeInfo LoadPlugin(string path)
/// <summary>
/// Loads plugins from the given assemblies.
/// </summary>
/// <param name="paths"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public IEnumerable<TPluginRuntimeInfo> LoadPlugins(Assembly[] assemblies, params object?[]? parameters)
{
return LoadPlugin(path, null);
foreach (var assembly in assemblies)
yield return LoadPlugin(assembly, parameters);
}
/// <summary>
/// Loads plugins from already loaded assemblies for the current <see cref="AppDomain.CurrentDomain"/>.
/// </summary>
/// <param name="listenAssemblyLoadContext">Do also load plugins from all yet not loaded assemblies by listening the event <see cref="AppDomain.AssemblyLoad"/>.
/// <returns></returns>
public IEnumerable<TPluginRuntimeInfo> LoadOwnPlugins(bool listenAssemblyLoadContext, params object?[]? parameters)
{
if (listenAssemblyLoadContext)
AppDomain.CurrentDomain.AssemblyLoad += CurrentDomain_AssemblyLoad;
foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
yield return LoadPlugin(assembly, parameters);
}
/// <summary>
/// Loads an assembly from the given file path and then loads the plugin from the assembly.
/// </summary>
/// <param name="path"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public TPluginRuntimeInfo LoadPlugin(string path, params object?[]? parameters)
{
var info = Activator.CreateInstance<TPluginRuntimeInfo>();
var irmplugin = typeof(TPluginInterface);
var loadContext = new PluginLoadContext(path);
Assembly? assembly = null;
if (File.Exists(path))
{
try
{
assembly = loadContext.LoadFromAssemblyName(new AssemblyName(Path.GetFileNameWithoutExtension(path)));
info.Assembly = loadContext.LoadFromAssemblyName(new AssemblyName(Path.GetFileNameWithoutExtension(path)));
}
catch
{
@@ -50,9 +85,37 @@ namespace Pilz.Plugins
else
info.Status = PluginStatus.FileNotFound;
if (assembly != null)
if (info.Assembly != null)
info = LoadPlugin(info.Assembly, parameters);
return info;
}
/// <summary>
/// Loads the plugin from a given assembly.
/// </summary>
/// <param name="assembly"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public TPluginRuntimeInfo LoadPlugin(Assembly assembly, params object?[]? parameters)
{
foreach (var type in assembly.GetTypes())
var info = Activator.CreateInstance<TPluginRuntimeInfo>();
info.Assembly = assembly;
LoadPlugin(info);
return info;
}
private void LoadPlugin(TPluginRuntimeInfo info, params object?[]? parameters)
{
var irmplugin = typeof(TPluginInterface);
if (info.Assembly == null)
info.Status = PluginStatus.NoValidPlugin;
else if (loadedPlugins.Any(n => n.Assembly == info.Assembly))
info.Status = PluginStatus.AlreadyLoaded;
else
{
foreach (var type in info.Assembly.GetTypes())
{
if (info.Plugin == null && irmplugin.IsAssignableFrom(type))
{
@@ -62,6 +125,7 @@ namespace Pilz.Plugins
{
info.Plugin = plugin;
info.Status = PluginStatus.Success;
loadedPlugins.Add(info);
}
}
catch
@@ -70,12 +134,10 @@ namespace Pilz.Plugins
}
}
}
}
if (info.Plugin == null)
info.Status = PluginStatus.NoValidPlugin;
}
return info;
}
}
}

2
Pilz.Plugins/PluginRuntimeInfoT.cs
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@@ -1,6 +1,7 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
@@ -10,5 +11,6 @@ namespace Pilz.Plugins
{
public T? Plugin { get; internal set; }
public PluginStatus Status { get; internal set; }
public Assembly? Assembly { get; internal set; }
}
}

1
Pilz.Plugins/PluginStatus.cs
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@@ -10,6 +10,7 @@ namespace Pilz.Plugins
{
None,
Success,
AlreadyLoaded,
FileNotFound,
ErrorAtLoading,
ErrorAtInitializing,