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/*
* Copyright (c) 2024 Vaughn Nugent
*
* Library: VNLib
* Package: VNLib.Plugins.Essentials.ServiceStack
* File: PluginRutimeEventHandler.cs
*
* PluginRutimeEventHandler.cs is part of VNLib.Plugins.Essentials.ServiceStack which
* is part of the larger VNLib collection of libraries and utilities.
*
* VNLib.Plugins.Essentials.ServiceStack is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 2 of the
* License, or (at your option) any later version.
*
* VNLib.Plugins.Essentials.ServiceStack is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see https://www.gnu.org/licenses/.
*/
using System.Linq;
using VNLib.Utils.Extensions;
using VNLib.Plugins.Runtime;
namespace VNLib.Plugins.Essentials.ServiceStack
{
internal sealed class PluginRutimeEventHandler(ServiceDomain Domain) : IPluginEventListener
{
///<inheritdoc/>
void IPluginEventListener.OnPluginLoaded(PluginController controller, object? state) => OnPluginLoaded((state as IManagedPlugin)!);
///<inheritdoc/>
void IPluginEventListener.OnPluginUnloaded(PluginController controller, object? state) => OnPluginUnloaded((state as IManagedPlugin)!);
/// <summary>
/// Called when a plugin has been successfully loaded and
/// should be put into service
/// </summary>
/// <param name="plugin">The plugin that was loaded</param>
internal void OnPluginLoaded(IManagedPlugin plugin)
{
//Run onload method before invoking other handlers
plugin.OnPluginLoaded();
//Get event listeners at event time because deps may be modified by the domain
ServiceGroup[] deps = Domain.ServiceGroups.Select(static d => d).ToArray();
//run onload method
deps.TryForeach(d => d.OnPluginLoaded(plugin));
}
/// <summary>
/// Called when a plugin is about to be unloaded and should
/// be removed from service.
/// </summary>
/// <param name="plugin">The plugin instance to unload</param>
internal void OnPluginUnloaded(IManagedPlugin plugin)
{
try
{
//Get event listeners at event time because deps may be modified by the domain
ServiceGroup[] deps = Domain.ServiceGroups.Select(static d => d).ToArray();
//Run unloaded method
deps.TryForeach(d => d.OnPluginUnloaded(plugin));
}
finally
{
//always unload the plugin wrapper
plugin.OnPluginUnloaded();
}
}
}
}
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