void LaunchDiscover(IEnumerable <FileInfo> files)
{
_discoverCount--;
if (_discoverCount == 0)
{
_currentVersion++;
if (DiscoverBegin != null)
{
DiscoverBegin(this, EventArgs.Empty);
}
Merger merger = new Merger(this);
AppDomainSetup ads = AppDomain.CurrentDomain.SetupInformation;
AppDomain discoverDomain = AppDomain.CreateDomain("CKDiscovererDomain", null, ads);
Runner.PluginDiscoverer runnerDiscoverer = (Runner.PluginDiscoverer)discoverDomain.CreateInstanceAndUnwrap(
Assembly.GetAssembly(typeof(Runner.PluginDiscoverer)).FullName, "CK.Plugin.Discoverer.Runner.PluginDiscoverer");
merger.Merge(runnerDiscoverer.Discover(files));
AppDomain.Unload(discoverDomain);
if (DiscoverDone != null)
{
DiscoverDone(this,
new DiscoverDoneEventArgs(merger.NewAssemblies, merger.ChangedAssemblies, merger.DeletedAssemblies,
merger.NewPlugins, merger.ChangedPlugins, merger.DeletedPlugins,
merger.NewEditors, merger.ChangedEditors, merger.DeletedEditors,
merger.NewServices, merger.ChangedServices, merger.DeletedServices,
merger.NewOldPlugins, merger.DeletedOldPlugins,
merger.NewMissingAssemblies, merger.DeletedMissingAssemblies));
}
}
}
internal ServiceInfo(PluginAssemblyInfo a, Type t)
{
_assembly = a;
_assemblyQualifiedName = t.AssemblyQualifiedName;
_serviceFullName = t.FullName;
_isDynamicService = PluginDiscoverer.IsIDynamicService(t);
_impl = new List <PluginInfo>();
_eventsInfoCollection = new List <SimpleEventInfo>();
_methodsInfoCollection = new List <SimpleMethodInfo>();
_propertiesInfoCollection = new List <SimplePropertyInfo>();
}
/// <summary>
/// Read all Type in the assembly.
/// </summary>
/// <param name="RegisterServiceInfo">Will be called for each discovered service interface.</param>
/// <param name="RegisterUseServiceInfo">Will be called for each discovered service reference.</param>
internal void ReadAllTypes(Func <PluginAssemblyInfo, Type, ServiceInfo> RegisterServiceInfo,
Func <Type, bool, ServiceRefInfo> RegisterUseServiceInfo)
{
Debug.Assert(_assembly != null);
List <PluginInfo> plug = new List <PluginInfo>();
List <ServiceInfo> serv = new List <ServiceInfo>();
// We loop on each type we can find into the assembly.
foreach (Type t in _assembly.GetExportedTypes())
{
// If it implements the IPlugin interface.
if (t.GetInterface(typeof(IPlugin).FullName) != null)
{
PluginInfo info = null;
try
{
// And if it have the PluginAttribute.
foreach (CustomAttributeData attr in CustomAttributeData.GetCustomAttributes(t))
{
if (attr.Constructor.DeclaringType.FullName == "CK.Plugin.PluginAttribute")
{
info = new PluginInfo(attr)
{
AssemblyInfo = this, PluginFullName = t.FullName
};
break;
}
}
if (info == null)
{
info = new PluginInfo("Unable to find Plugin attribute.");
}
}
catch (Exception ex)
{
info = new PluginInfo(ex.Message);
}
Debug.Assert(info != null, "At this point, info can not be null.");
if (info.ErrorMessage == null) // If there are no errors
{
// Discover implemented Services.
try
{
ServiceInfo result = null;
foreach (Type i in t.GetInterfaces())
{
if (i.IsGenericType && i.GetGenericTypeDefinition().AssemblyQualifiedName == typeof(IService <>).AssemblyQualifiedName)
{
// Implementing the IService marker interface is an error.
info.AddErrorLine(R.PluginImplementIService);
break;
}
if (PluginDiscoverer.IsIDynamicService(i))
{
if (result != null)
{
// Only one IService can be implemented at a time.
info.AddErrorLine(R.MultipleServiceImplementation);
result = null;
break;
}
else
{
// We are on a IDynamicService, not a IService<>.
ServiceRefInfo r = RegisterUseServiceInfo(i, false);
Debug.Assert(!r.IsIServiceWrapped && !r.IsUnknownGenericInterface, "We tested this above.");
Debug.Assert(r.Reference != null, "Since we are on a IDynamicService (tested above).");
result = r.Reference;
}
}
}
if (result != null)
{
result.Implementations.Add(info);
}
info.Service = result;
}
catch (Exception ex)
{
info.AddErrorLine(ex.Message);
}
// Discover referenced Services and edited configuration.
try
{
// Process public properties to discover service references and edited configurations.
List <ServiceReferenceInfo> refs = info.ServiceReferences = new List <ServiceReferenceInfo>();
foreach (PropertyInfo p in t.GetProperties())
{
try
{
bool serviceRefHandled = false;
bool editedConfHandled = false;
foreach (CustomAttributeData attr in CustomAttributeData.GetCustomAttributes(p))
{
#region The [DynamicServiceAttribute] has the priority.
if (attr.Constructor.DeclaringType.FullName == typeof(DynamicServiceAttribute).FullName)
{
serviceRefHandled = true;
ServiceReferenceInfo dep;
// Since we are in a [DynamicServiceAttribute], we expect a IDynamicService and reject any other generic interface than IService<>,
// but we accept other (not IDynamicService) interfaces in order to capture the reference (hence the registerOnlyIDynamicService = false parameter below).
ServiceRefInfo r = RegisterUseServiceInfo(p.PropertyType, false);
dep = new ServiceReferenceInfo(info, p.Name, r, attr.NamedArguments);
Debug.Assert((r.Reference == null) == (r.IsUnknownGenericInterface));
// Handle errors.
if (!p.CanWrite)
{
dep.AddErrorLine(R.NotWritableServiceType);
}
if (r.IsUnknownGenericInterface)
{
dep.AddErrorLine(R.GenericServiceOtherThanIServiceNotSupported);
}
if (!r.IsIDynamicService)
{
Debug.Assert(!PluginDiscoverer.IsIDynamicService(p.PropertyType));
dep.AddErrorLine(R.DynamicServiceAttributeRequiresIDynamicService);
}
refs.Add(dep);
break;
}
#endregion
#region The [RequiredService] can reference non IDynamicService service.
if (attr.Constructor.DeclaringType.FullName == typeof(RequiredServiceAttribute).FullName)
{
RunningRequirement req = RunningRequirement.MustExistAndRun;
// Since [RequiredServiceAttribute] can have Requires = false parameter.
if (attr.NamedArguments.Count == 1 && (bool)attr.NamedArguments[0].TypedValue.Value == false)
{
// If Requires == false, we consider it to be optional.
req = RunningRequirement.Optional;
}
serviceRefHandled = true;
ServiceRefInfo r = RegisterUseServiceInfo(p.PropertyType, false);
ServiceReferenceInfo dep = new ServiceReferenceInfo(info, p.Name, r, req);
if (!p.CanWrite)
{
dep.AddErrorLine(R.NotWritableServiceType);
}
else if (r.IsUnknownGenericInterface)
{
dep.AddErrorLine(R.GenericServiceOtherThanIServiceNotSupported);
}
refs.Add(dep);
break;
}
#endregion
#region The [EditedConfiguration] comes last...
if (attr.Constructor.DeclaringType.FullName == typeof(ConfigurationAccessorAttribute).FullName)
{
editedConfHandled = true;
try
{
info.EditorsInfo.Add(new PluginConfigAccessorInfo(attr, info, false)
{
ConfigurationPropertyName = p.Name
});
}
catch (Exception ex)
{
info.AddErrorLine(ex.Message);
}
}
#endregion
}
// If the property has not been handled through its attributes, we detect potential services references: any public read/write
// property that expose a IDynamicService or a IService<> is transformed into an optional ServiceReferenceInfo.
if (!serviceRefHandled && !editedConfHandled && p.CanWrite && p.CanRead)
{
if (p.PropertyType.IsInterface)
{
if (p.PropertyType.Name == "IPluginConfigAccessor")
{
info.EditorsInfo.Add(new PluginConfigAccessorInfo(null, info, true)
{
ConfigurationPropertyName = p.Name
});
}
else
{
// Here we only register services if they are IDynamicService.
ServiceRefInfo r = RegisterUseServiceInfo(p.PropertyType, true);
if (r.Reference != null)
{
Debug.Assert(r.IsIDynamicService);
ServiceReferenceInfo dep;
dep = new ServiceReferenceInfo(info, p.Name, r, RunningRequirement.Optional);
}
}
}
}
}
catch (Exception ex)
{
info.AddErrorLine(ex.Message);
}
}
}
catch (Exception ex)
{
info.AddErrorLine(ex.Message);
}
plug.Add(info);
}
}
// Discover just a service
else if (t.IsInterface && PluginDiscoverer.IsIDynamicService(t))
{
ServiceInfo service = RegisterServiceInfo(this, t);
service.AssemblyQualifiedName = t.AssemblyQualifiedName;
// Get the Events that the service exposes
foreach (EventInfo e in CK.Reflection.ReflectionHelper.GetFlattenEvents(t))
{
service.EventsInfoCollection.Add(new SimpleEventInfo(e.Name));
}
// Get the Properties that the service exposes
foreach (PropertyInfo p in CK.Reflection.ReflectionHelper.GetFlattenProperties(t))
{
service.PropertiesInfoCollection.Add(new SimplePropertyInfo(p.Name, p.PropertyType.ToString()));
}
// Get the Methods that the service exposes
foreach (MethodInfo m in CK.Reflection.ReflectionHelper.GetFlattenMethods(t))
{
if (!m.IsSpecialName)
{
Type tR = m.ReturnType;
SimpleMethodInfo s = new SimpleMethodInfo(m.Name, tR.ToString());
foreach (ParameterInfo p in m.GetParameters())
{
s.Parameters.Add(new SimpleParameterInfo(p.Name, p.ParameterType.ToString()));
}
service.MethodsInfoCollection.Add(s);
}
}
serv.Add(service);
}
}
// Fills _plugins and _services collections (properties Plugin and Services of this PluginAssemblyInfo)
// with local collections (Plugin = _plugins = plug & Services = _services = serv).
_plugins = plug;
_services = serv;
}