public async Task <T> LoadPlugin <T>(AssemblyScanResult scanResult, string hostFramework = null, Action <PluginLoadContext> configureLoadContext = null)
{
hostFramework = hostFramework.ValueOrDefault(HostFrameworkUtils.GetHostframeworkFromHost());
var servicesForPlugin = new ServiceCollection();
var pathToAssembly = Path.Combine(scanResult.AssemblyPath, scanResult.AssemblyName);
var pluginLoadContext = PluginLoadContext.DefaultPluginLoadContext(pathToAssembly, typeof(T), hostFramework);
// This allows the loading of netstandard plugins
pluginLoadContext.IgnorePlatformInconsistencies = true;
configureLoadContext?.Invoke(pluginLoadContext);
var pluginAssembly = await this.assemblyLoader.Load(pluginLoadContext);
var pluginTypes = this.pluginTypeSelector.SelectPluginTypes <T>(pluginAssembly);
var pluginType = pluginTypes.FirstOrDefault(p => p.Name.Equals(scanResult.PluginType.Name));
if (pluginType == null)
{
throw new PluginLoadException($"Did not found any plugins to load from {nameof(AssemblyScanResult)} {scanResult.AssemblyPath} {scanResult.AssemblyName}");
}
return(await this.pluginActivator.ActivatePlugin <T>(new DefaultPluginActivationOptions
{
PluginType = pluginType,
PluginAssembly = pluginAssembly,
ParameterConverter = this.parameterConverter,
ResultConverter = this.resultConverter,
HostServices = pluginLoadContext.HostServices
}));
}
public static PluginLoadContext AddDowngradableHostAssemblies(this PluginLoadContext pluginLoadContext, IEnumerable <string> assemblies)
{
if (assemblies == null || !assemblies.Any())
{
return(pluginLoadContext); // short circuit
}
pluginLoadContext.DowngradableHostAssemblies = new List <string>(pluginLoadContext.DowngradableHostAssemblies.Union(assemblies));
return(pluginLoadContext);
}
public static PluginLoadContext AddDowngradableHostTypes(this PluginLoadContext pluginLoadContext, IEnumerable <Type> downgradableHostTypes)
{
if (downgradableHostTypes == null || !downgradableHostTypes.Any())
{
return(pluginLoadContext); // short circuit
}
pluginLoadContext.DowngradableHostTypes = new List <Type>(pluginLoadContext.DowngradableHostTypes.Union(downgradableHostTypes));
return(pluginLoadContext);
}
public static PluginLoadContext AddRemoteTypes(this PluginLoadContext pluginLoadContext, IEnumerable <Type> remoteTypes)
{
if (remoteTypes == null || !remoteTypes.Any())
{
return(pluginLoadContext); // short circuit
}
pluginLoadContext.RemoteTypes = new List <Type>(pluginLoadContext.RemoteTypes.Union(remoteTypes));
return(pluginLoadContext);
}
public static PluginLoadContext AddAdditionalProbingPaths(this PluginLoadContext pluginLoadContext, IEnumerable <string> additionalProbingPaths)
{
if (additionalProbingPaths == null || !additionalProbingPaths.Any())
{
return(pluginLoadContext); // short circuit
}
pluginLoadContext.AdditionalProbingPaths = new List <string>(pluginLoadContext.AdditionalProbingPaths.Union(additionalProbingPaths));
return(pluginLoadContext);
}
public static PluginLoadContext AddHostService(this PluginLoadContext pluginLoadContext, ServiceDescriptor hostService)
{
// Add the Host service to the servicecollection of the plugin
pluginLoadContext.HostServices.Add(hostService);
return(pluginLoadContext
// A host type will always live inside the host
.AddHostTypes(new[] { hostService.ServiceType })
// The implementation type will always exist on the Host, since it will be created here
.AddHostTypes(new[] { hostService.ImplementationType ?? hostService.ImplementationInstance?.GetType() ?? hostService.ImplementationFactory?.Method.ReturnType }));
}
public async Task <IEnumerable <T> > LoadPluginsAsAsyncEnumerable <T>(AssemblyScanResult scanResult, string hostFramework = null, Action <PluginLoadContext> configureLoadContext = null)
{
#endif
hostFramework = hostFramework.ValueOrDefault(HostFrameworkUtils.GetHostframeworkFromHost());
var pathToAssembly = Path.Combine(scanResult.AssemblyPath, scanResult.AssemblyName);
var pluginLoadContext = PluginLoadContext.DefaultPluginLoadContext(pathToAssembly, typeof(T), hostFramework);
// This allows the loading of netstandard plugins
pluginLoadContext.IgnorePlatformInconsistencies = true;
configureLoadContext?.Invoke(pluginLoadContext);
var pluginAssembly = await this.assemblyLoader.Load(pluginLoadContext);
this.pluginContexts.Add(pluginLoadContext);
var pluginTypes = this.pluginTypeSelector.SelectPluginTypes <T>(pluginAssembly);
#if SUPPORTS_ASYNC_STREAMS
foreach (var pluginType in pluginTypes)
{
yield return(await this.pluginActivator.ActivatePlugin <T>(new DefaultPluginActivationOptions
{
PluginType = pluginType,
PluginAssembly = pluginAssembly,
ParameterConverter = this.parameterConverter,
ResultConverter = this.resultConverter,
HostServices = pluginLoadContext.HostServices
}));
}
#else
var plugins = new List <T>();
foreach (var pluginType in pluginTypes)
{
plugins.Add(await this.pluginActivator.ActivatePlugin <T>(new DefaultPluginActivationOptions
{
PluginType = pluginType,
PluginAssembly = pluginAssembly,
ParameterConverter = this.parameterConverter,
ResultConverter = this.resultConverter,
HostServices = pluginLoadContext.HostServices
}));
}
return(plugins);
#endif
}
public static PluginLoadContext AddHostServices(this PluginLoadContext pluginLoadContext,
IServiceCollection hostServices,
IEnumerable <Type> includeTypes = null,
IEnumerable <Type> excludeTypes = null)
{
if (includeTypes == null || !includeTypes.Any())
{
return(pluginLoadContext); // short circuit
}
var hostTypes = new List <Type>();
var priseServices = hostServices.Where(s => IsPriseService(s.ServiceType));
var includeServices = hostServices.Where(s => Includes(s.ServiceType, includeTypes));
var excludeServices = hostServices.Where(s => Excludes(s.ServiceType, excludeTypes));
foreach (var hostService in hostServices
.Except(priseServices)
.Union(includeServices)
.Except(excludeServices))
{
pluginLoadContext.AddHostService(hostService);
}
return(pluginLoadContext);
}
public static PluginLoadContext AddHostService <T>(this PluginLoadContext pluginLoadContext, T implementation, ServiceLifetime serviceLifetime = ServiceLifetime.Scoped)
{
return(pluginLoadContext.AddHostService(new ServiceDescriptor(typeof(T), (s) => implementation, serviceLifetime)));
}
public static PluginLoadContext AddHostService(this PluginLoadContext pluginLoadContext, Type hostServiceType, Type hostServiceImplementationType, ServiceLifetime serviceLifetime = ServiceLifetime.Scoped)
{
return(pluginLoadContext.AddHostService(new ServiceDescriptor(hostServiceType, hostServiceImplementationType, serviceLifetime)));
}
public static PluginLoadContext SetRuntimePlatformContext(this PluginLoadContext pluginLoadContext, IRuntimePlatformContext runtimePlatformContext)
{
pluginLoadContext.RuntimePlatformContext = runtimePlatformContext;
return(pluginLoadContext);
}
public static PluginLoadContext SetPlatformVersion(this PluginLoadContext pluginLoadContext, PluginPlatformVersion pluginPlatformVersion)
{
pluginLoadContext.PluginPlatformVersion = pluginPlatformVersion;
return(pluginLoadContext);
}
public static PluginLoadContext SetNativeDependencyLoadPreference(this PluginLoadContext pluginLoadContext, NativeDependencyLoadPreference nativeDependencyLoadPreference)
{
pluginLoadContext.NativeDependencyLoadPreference = nativeDependencyLoadPreference;
return(pluginLoadContext);
}
