public void EnsureInitialized(ContainerService service, ContainerContext containerContext, ContainerService root)
{
if (!Owned)
return;
var componentInstance = Instance as IInitializable;
if (componentInstance == null)
return;
if (!initialized)
lock (this)
if (!initialized)
{
var name = new ServiceName(Instance.GetType(), service.UsedContracts);
if (containerContext.infoLogger != null)
containerContext.infoLogger(name, "initialize started");
try
{
componentInstance.Initialize();
}
catch (Exception e)
{
throw new SimpleContainerException(string.Format("exception initializing {0}\r\n\r\n{1}", name, root.GetConstructionLog(containerContext)), e);
}
if (containerContext.infoLogger != null)
containerContext.infoLogger(name, "initialize finished");
initialized = true;
}
}
public ServiceDependency ServiceError(ContainerService service, string name = null)
{
return SetName(new ServiceDependency
{
Status = ServiceStatus.DependencyError,
ContainerService = service
}, null, name);
}
public ServiceDependency NotResolved(ContainerService service, string name = null)
{
return SetName(new ServiceDependency
{
Status = ServiceStatus.NotResolved,
ContainerService = service
}, null, name);
}
public ServiceDependency Service(ContainerService service, object value, string name = null)
{
return(SetName(new ServiceDependency
{
Status = ServiceStatus.Ok,
Value = value,
ContainerService = service
}, null, name));
}
public ServiceDependency Service(ContainerService service, object value, string name = null)
{
return SetName(new ServiceDependency
{
Status = ServiceStatus.Ok,
Value = value,
ContainerService = service
}, null, name);
}
public bool TryGet(out ContainerService result)
{
if (value != null)
{
result = value;
return true;
}
result = null;
return false;
}
public ServiceDependency Error(ContainerService containerService, string name, string message,
params object[] args)
{
return(SetName(new ServiceDependency
{
ContainerService = containerService,
Status = ServiceStatus.Error,
Comment = string.Format(message, args)
}, null, name));
}
public static ServiceDependency Error(ContainerService containerService, string name, string message,
params object[] args)
{
return new ServiceDependency
{
ContainerService = containerService,
Status = ServiceStatus.Error,
Comment = string.Format(message, args)
}.WithName(null, name);
}
public bool TryGet(out ContainerService result)
{
if (value != null)
{
result = value;
return(true);
}
result = null;
return(false);
}
public static bool TryCreate(ContainerService.Builder builder)
{
var factoryType = builder.Type.GetNestedType("Factory");
if (factoryType == null)
return false;
var method = factoryType.GetMethod("Create", Type.EmptyTypes);
if (method == null)
return false;
var factory = builder.Context.Container.Resolve(method.DeclaringType, InternalHelpers.emptyStrings, false);
if (factory.IsOk())
builder.CreateInstanceBy(CallTarget.M(method, factory.Single(), new object[0]), true);
return true;
}
public static bool TryCreate(ContainerService.Builder builder)
{
var factoryType = builder.Type.GetNestedType("Factory");
if (factoryType == null)
return false;
var method = factoryType.GetMethod("Create", Type.EmptyTypes);
if (method == null)
return false;
var factory = builder.Context.Container.ResolveSingleton(method.DeclaringType, builder.Context);
var dependency = factory.AsSingleInstanceDependency(null);
builder.AddDependency(dependency, false);
if (dependency.Status == ServiceStatus.Ok)
builder.CreateInstance(method, dependency.Value, new object[0]);
return true;
}
private void PopResolutionContext(ResolutionContext.ResolutionContextActivation activation,
ContainerService containerService, bool isEnumerable)
{
ResolutionContext.Pop(activation);
if (activation.previous == null)
{
return;
}
var resultDependency = containerService.AsDependency(containerContext, "() => " + containerService.Type.FormatName(), isEnumerable);
if (activation.activated.Container != activation.previous.Container)
{
resultDependency.Comment = "container boundary";
}
activation.previous.TopBuilder.AddDependency(resultDependency, false);
}
public bool AcquireInstantiateLock(out ContainerService service)
{
if (value != null)
{
service = value;
return false;
}
Monitor.Enter(lockObject);
if (value != null)
{
Monitor.Exit(lockObject);
service = value;
return false;
}
service = null;
return true;
}
public void LinkTo(ContainerContext containerContext, ContainerService childService, string comment)
{
var dependency = childService.AsDependency(containerContext, null, true);
dependency.Comment = comment;
AddDependency(dependency, true);
UnionUsedContracts(childService);
if (target.Status.IsGood())
{
foreach (var instance in childService.Instances)
{
if (!instances.Contains(instance))
{
AddInstance(instance);
}
}
}
}
internal object Create(ServiceName name, bool isEnumerable, object arguments)
{
Func <object> compiledFactory;
var hasPendingResolutionContext = ResolutionContext.HasPendingResolutionContext;
if (arguments == null && factoryCache.TryGetValue(name, out compiledFactory) && !hasPendingResolutionContext)
{
return(compiledFactory());
}
var activation = ResolutionContext.Push(this);
ContainerService result = null;
List <string> oldContracts = null;
try
{
if (hasPendingResolutionContext)
{
oldContracts = activation.activated.Contracts.Replace(name.Contracts);
name = new ServiceName(name.Type);
}
result = ResolveCore(name, true, ObjectAccessor.Get(arguments), activation.activated);
}
finally
{
if (oldContracts != null)
{
activation.activated.Contracts.Restore(oldContracts);
}
PopResolutionContext(activation, result, isEnumerable);
}
if (!hasPendingResolutionContext)
{
result.EnsureInitialized(containerContext, result);
}
result.CheckStatusIsGood(containerContext);
if (isEnumerable)
{
return(result.GetAllValues());
}
result.CheckSingleValue(containerContext);
return(result.Instances[0].Instance);
}
public void EnsureInitialized(ContainerContext containerContext, ContainerService root)
{
if (Status != ServiceStatus.Ok)
{
return;
}
if (!initialized)
{
lock (lockObject)
if (!initialized)
{
initializing = true;
var oldInitializingService = threadInitializing;
threadInitializing = true;
try
{
if (dependencies != null)
{
foreach (var dependency in dependencies)
{
if (dependency.ContainerService != null)
{
dependency.ContainerService.EnsureInitialized(containerContext, root);
}
}
}
foreach (var instance in Instances)
{
instance.EnsureInitialized(this, containerContext, root);
}
initialized = true;
}
finally
{
initializing = false;
threadInitializing = oldInitializingService;
}
}
}
}
public void EnsureInitialized(ContainerService service, ContainerContext containerContext, ContainerService root)
{
if (!Owned)
{
return;
}
var componentInstance = Instance as IInitializable;
if (componentInstance == null)
{
return;
}
if (!initialized)
{
lock (this)
if (!initialized)
{
var name = new ServiceName(Instance.GetType(), service.UsedContracts);
if (containerContext.infoLogger != null)
{
containerContext.infoLogger(name, "initialize started");
}
try
{
componentInstance.Initialize();
}
catch (Exception e)
{
throw new SimpleContainerException(
string.Format("exception initializing {0}\r\n\r\n{1}", name, root.GetConstructionLog(containerContext)), e);
}
if (containerContext.infoLogger != null)
{
containerContext.infoLogger(name, "initialize finished");
}
initialized = true;
}
}
}
public void UnionUsedContracts(ContainerService dependency)
{
if (dependency.UsedContracts == null)
{
return;
}
if (usedContractNames == null)
{
usedContractNames = new List <string>();
}
foreach (var dependencyContract in dependency.UsedContracts)
{
if (usedContractNames.ContainsIgnoringCase(dependencyContract))
{
continue;
}
string usedContractName = null;
if (DeclaredContracts.ContainsIgnoringCase(dependencyContract))
{
usedContractName = dependencyContract;
}
else if (ExpandedUnions.HasValue)
{
foreach (var c in ExpandedUnions.Value.unionedContracts)
{
if (c.children.ContainsIgnoringCase(dependencyContract))
{
usedContractName = c.parent;
break;
}
}
}
if (usedContractName != null)
{
usedContractNames.Add(usedContractName);
}
}
}
public void WriteConstructionLog(ConstructionLogContext context)
{
context.WriteIndent();
if (ContainerService != null)
{
context.UsedFromDependency = this;
ContainerService.WriteConstructionLog(context);
return;
}
if (Status != ServiceStatus.Ok)
{
context.Writer.WriteMeta("!");
}
context.Writer.WriteName(Name);
if (Comment != null && Status != ServiceStatus.Error)
{
context.Writer.WriteMeta(" - ");
context.Writer.WriteMeta(Comment);
}
if (Status == ServiceStatus.Ok && constantKind.HasValue)
{
if (constantKind == ConstantKind.Value)
{
ValueFormatter.WriteValue(context, Value, true);
}
if (constantKind == ConstantKind.Resource)
{
context.Writer.WriteMeta(string.Format(" resource [{0}]", resourceName));
}
}
if (Status == ServiceStatus.Error)
{
context.Writer.WriteMeta(" <---------------");
}
context.Writer.WriteNewLine();
}
public void LinkTo(ContainerContext containerContext, ContainerService childService, string comment)
{
var dependency = childService.GetLinkedDependency(containerContext);
dependency.Comment = comment;
AddDependency(dependency, true);
UnionUsedContracts(childService);
if (target.Status.IsGood())
foreach (var instance in childService.instances)
if (!instances.Contains(instance))
instances.Add(instance);
}
public Builder(Type type, ResolutionContext context, bool createNew, IObjectAccessor arguments)
{
Arguments = arguments;
CreateNew = createNew;
target = new ContainerService {Type = type};
Context = context;
DeclaredContracts = context.Contracts.ToArray();
try
{
Configuration = context.Container.GetConfiguration(Type, context);
}
catch (Exception e)
{
SetError(e);
return;
}
SetComment(Configuration.Comment);
foreach (var contract in Configuration.Contracts)
{
if (usedContractNames == null)
usedContractNames = new List<string>();
if (!usedContractNames.Contains(contract, StringComparer.OrdinalIgnoreCase))
usedContractNames.Add(contract);
}
}
internal void Instantiate(ContainerService.Builder builder)
{
LifestyleAttribute lifestyle;
if (builder.Type.IsSimpleType())
builder.SetError("can't create simple type");
else if (builder.Type == typeof (IContainer))
builder.AddInstance(this, false);
else if (builder.Configuration.ImplementationAssigned)
builder.AddInstance(builder.Configuration.Implementation, builder.Configuration.ContainerOwnsInstance);
else if (builder.Configuration.Factory != null)
builder.CreateInstanceBy(() => builder.Configuration.Factory(this), builder.Configuration.ContainerOwnsInstance);
else if (builder.Configuration.FactoryWithTarget != null)
{
if (!builder.Context.AnalizeDependenciesOnly)
{
var previousService = builder.Context.GetPreviousBuilder();
var target = previousService == null ? null : previousService.Type;
builder.CreateInstanceBy(() => builder.Configuration.FactoryWithTarget(this, target),
builder.Configuration.ContainerOwnsInstance);
}
}
else if (builder.Type.IsValueType)
builder.SetError("can't create value type");
else if (builder.Type.IsGenericType && builder.Type.ContainsGenericParameters)
builder.SetError("can't create open generic");
else if (!builder.CreateNew && builder.Type.TryGetCustomAttribute(out lifestyle) &&
lifestyle.Lifestyle == Lifestyle.PerRequest)
{
const string messageFormat = "service [{0}] with PerRequest lifestyle can't be resolved, use Func<{0}> instead";
builder.SetError(string.Format(messageFormat, builder.Type.FormatName()));
}
else if (builder.Type.IsAbstract)
InstantiateInterface(builder);
else
InstantiateImplementation(builder);
if (builder.Configuration.InstanceFilter != null)
{
var filteredOutCount = builder.FilterInstances(builder.Configuration.InstanceFilter);
if (filteredOutCount > 0)
builder.SetComment("instance filter");
}
}
private void InstantiateImplementation(ContainerService.Builder builder)
{
if (builder.DontUse())
{
builder.SetComment("DontUse");
return;
}
var result = FactoryCreator.TryCreate(builder) ?? LazyCreator.TryCreate(builder);
if (result != null)
{
builder.AddInstance(result, true);
return;
}
if (NestedFactoryCreator.TryCreate(builder))
return;
if (CtorFactoryCreator.TryCreate(builder))
return;
if (builder.Type.IsDelegate())
{
builder.SetError(string.Format("can't create delegate [{0}]", builder.Type.FormatName()));
return;
}
var constructor = builder.Type.GetConstructor();
if (!constructor.isOk)
{
builder.SetError(constructor.errorMessage);
return;
}
var formalParameters = constructor.value.GetParameters();
var actualArguments = new object[formalParameters.Length];
var hasServiceNameParameters = false;
for (var i = 0; i < formalParameters.Length; i++)
{
var formalParameter = formalParameters[i];
if (formalParameter.ParameterType == typeof (ServiceName))
{
hasServiceNameParameters = true;
continue;
}
var dependency = InstantiateDependency(formalParameter, builder).CastTo(formalParameter.ParameterType);
builder.AddDependency(dependency, false);
if (dependency.ContainerService != null)
builder.UnionUsedContracts(dependency.ContainerService);
if (builder.Status != ServiceStatus.Ok && !builder.Context.AnalizeDependenciesOnly)
return;
actualArguments[i] = dependency.Value;
}
foreach (var d in builder.Configuration.ImplicitDependencies)
{
var dependency = builder.Context.Resolve(d).AsSingleInstanceDependency(null);
dependency.Comment = "implicit";
builder.AddDependency(dependency, false);
if (dependency.ContainerService != null)
builder.UnionUsedContracts(dependency.ContainerService);
if (builder.Status != ServiceStatus.Ok)
return;
}
builder.EndResolveDependencies();
if (builder.Context.AnalizeDependenciesOnly)
return;
var dependenciesResolvedByArguments = builder.Arguments == null
? InternalHelpers.emptyStrings
: builder.Arguments.GetUsed().Select(InternalHelpers.ByNameDependencyKey);
var unusedConfigurationKeys = builder.Configuration.GetUnusedDependencyConfigurationKeys()
.Except(dependenciesResolvedByArguments)
.ToArray();
if (unusedConfigurationKeys.Length > 0)
{
builder.SetError(string.Format("unused dependency configurations [{0}]", unusedConfigurationKeys.JoinStrings(",")));
return;
}
if (hasServiceNameParameters)
for (var i = 0; i < formalParameters.Length; i++)
if (formalParameters[i].ParameterType == typeof (ServiceName))
actualArguments[i] = builder.GetName();
if (builder.CreateNew || builder.DeclaredContracts.Length == builder.FinalUsedContracts.Length)
{
builder.CreateInstance(constructor.value, null, actualArguments);
if (builder.CreateNew && builder.Arguments == null)
{
var compiledConstructor = constructor.value.Compile();
factoryCache.TryAdd(builder.GetName(), () =>
{
var instance = compiledConstructor(null, actualArguments);
var component = instance as IInitializable;
if (component != null)
component.Initialize();
return instance;
});
}
return;
}
var serviceForUsedContractsId = instanceCache.GetOrAdd(builder.GetName(), createId);
ContainerService serviceForUsedContracts;
if (serviceForUsedContractsId.AcquireInstantiateLock(out serviceForUsedContracts))
{
builder.CreateInstance(constructor.value, null, actualArguments);
serviceForUsedContracts = builder.Build();
serviceForUsedContractsId.ReleaseInstantiateLock(builder.Context.AnalizeDependenciesOnly
? null
: serviceForUsedContracts);
}
else
builder.Reuse(serviceForUsedContracts);
}
public void Reuse(ContainerService containerService)
{
target = containerService;
built = true;
}
public void ReleaseInstantiateLock(ContainerService result)
{
value = result;
Monitor.Exit(lockObject);
}
private void InstantiateInterface(ContainerService.Builder builder)
{
var implementationTypes = GetImplementationTypes(builder);
ApplySelectors(implementationTypes, builder);
if (implementationTypes.Count == 0)
{
builder.SetComment("has no implementations");
return;
}
Func<object> factory = null;
var canUseFactory = true;
foreach (var implementationType in implementationTypes)
if (implementationType.accepted)
{
var implementationService = builder.CreateNew
? builder.Context.Instantiate(implementationType.type, true, builder.Arguments)
: builder.Context.Resolve(ServiceName.Parse(implementationType.type, false));
builder.LinkTo(containerContext, implementationService, implementationType.comment);
if (builder.CreateNew && builder.Arguments == null &&
implementationService.Status == ServiceStatus.Ok && canUseFactory)
if (factory == null)
{
if (!factoryCache.TryGetValue(implementationService.Name, out factory))
canUseFactory = false;
}
else
canUseFactory = false;
if (builder.Status.IsBad())
return;
}
else
{
var dependency = ServiceDependency.NotResolved(null, implementationType.type.FormatName());
dependency.Comment = implementationType.comment;
builder.AddDependency(dependency, true);
}
builder.EndResolveDependencies();
if (factory != null && canUseFactory)
factoryCache.TryAdd(builder.GetName(), factory);
}
private void InstantiateInterface(ContainerService.Builder builder)
{
HashSet<ImplementationType> implementationTypes;
try
{
implementationTypes = GetImplementationTypes(builder);
}
catch (Exception e)
{
builder.SetError(e);
return;
}
ApplySelectors(implementationTypes, builder);
if (implementationTypes.Count == 0)
{
builder.SetComment("has no implementations");
return;
}
Func<object> factory = null;
var canUseFactory = true;
foreach (var implementationType in implementationTypes)
if (implementationType.accepted)
{
var implementationService = ResolveCore(ServiceName.Parse(implementationType.type, InternalHelpers.emptyStrings),
builder.CreateNew, builder.Arguments, builder.Context);
builder.LinkTo(containerContext, implementationService, implementationType.comment);
if (builder.CreateNew && builder.Arguments == null &&
implementationService.Status == ServiceStatus.Ok && canUseFactory)
if (factory == null)
{
if (!factoryCache.TryGetValue(implementationService.Name, out factory))
canUseFactory = false;
}
else
canUseFactory = false;
if (builder.Status.IsBad())
return;
}
else
{
var dependency = containerContext.NotResolved(null, implementationType.type.FormatName());
dependency.Comment = implementationType.comment;
builder.AddDependency(dependency, true);
}
builder.EndResolveDependencies();
if (factory != null && canUseFactory)
factoryCache.TryAdd(builder.GetFinalName(), factory);
}
private void PopResolutionContext(ResolutionContext.ResolutionContextActivation activation,
ContainerService containerService, bool isEnumerable)
{
ResolutionContext.Pop(activation);
if (activation.previous == null)
return;
var resultDependency = containerService.AsDependency(containerContext, "() => " + containerService.Type.FormatName(),isEnumerable);
if (activation.activated.Container != activation.previous.Container)
resultDependency.Comment = "container boundary";
activation.previous.TopBuilder.AddDependency(resultDependency, false);
}
private void InstantiateImplementation(ContainerService.Builder builder)
{
if (builder.DontUse())
{
builder.SetComment("DontUse");
return;
}
var result = FactoryCreator.TryCreate(builder) ?? LazyCreator.TryCreate(builder);
if (result != null)
{
builder.AddInstance(result, true, false);
return;
}
if (NestedFactoryCreator.TryCreate(builder))
return;
if (CtorFactoryCreator.TryCreate(builder))
return;
if (builder.Type.IsDelegate())
{
builder.SetError(string.Format("can't create delegate [{0}]", builder.Type.FormatName()));
return;
}
var constructor = builder.Type.GetConstructor();
if (!constructor.isOk)
{
builder.SetError(constructor.errorMessage);
return;
}
var formalParameters = constructor.value.GetParameters();
var actualArguments = new object[formalParameters.Length];
var hasServiceNameParameters = false;
for (var i = 0; i < formalParameters.Length; i++)
{
var formalParameter = formalParameters[i];
if (formalParameter.ParameterType == typeof (ServiceName))
{
hasServiceNameParameters = true;
continue;
}
var dependency = InstantiateDependency(formalParameter, builder).CastTo(formalParameter.ParameterType);
builder.AddDependency(dependency, false);
if (dependency.ContainerService != null)
builder.UnionUsedContracts(dependency.ContainerService);
if (builder.Status != ServiceStatus.Ok && !builder.Context.AnalizeDependenciesOnly)
return;
actualArguments[i] = dependency.Value;
}
foreach (var d in builder.Configuration.ImplicitDependencies)
{
var dependency = ResolveCore(ServiceName.Parse(d.Type, d.Contracts), false, null, builder.Context)
.AsDependency(containerContext, null, false);
dependency.Comment = "implicit";
builder.AddDependency(dependency, false);
if (dependency.ContainerService != null)
builder.UnionUsedContracts(dependency.ContainerService);
if (builder.Status != ServiceStatus.Ok)
return;
}
builder.EndResolveDependencies();
if (builder.Context.AnalizeDependenciesOnly)
return;
var dependenciesResolvedByArguments = builder.Arguments == null ? null : builder.Arguments.GetUsed();
List<string> unusedConfigurationKeys = null;
foreach (var k in builder.Configuration.GetUnusedDependencyKeys())
{
var resolvedByArguments = dependenciesResolvedByArguments != null &&
k.name != null &&
dependenciesResolvedByArguments.Contains(k.name);
if (resolvedByArguments)
continue;
if (unusedConfigurationKeys == null)
unusedConfigurationKeys = new List<string>();
unusedConfigurationKeys.Add(k.ToString());
}
if (unusedConfigurationKeys != null)
{
builder.SetError(string.Format("unused dependency configurations [{0}]", unusedConfigurationKeys.JoinStrings(",")));
return;
}
if (hasServiceNameParameters)
for (var i = 0; i < formalParameters.Length; i++)
if (formalParameters[i].ParameterType == typeof (ServiceName))
actualArguments[i] = builder.GetFinalName();
if (builder.CreateNew || builder.DeclaredContracts.Length == builder.FinalUsedContracts.Length)
{
builder.CreateInstanceBy(CallTarget.M(constructor.value, null, actualArguments), true);
if (builder.CreateNew && builder.Arguments == null)
{
var compiledConstructor = constructor.value.Compile();
factoryCache.TryAdd(builder.GetFinalName(), () =>
{
var instance = compiledConstructor(null, actualArguments);
var component = instance as IInitializable;
if (component != null)
component.Initialize();
return instance;
});
}
return;
}
var serviceForUsedContractsId = instanceCache.GetOrAdd(builder.GetFinalName(), createId);
var acquireResult = serviceForUsedContractsId.AcquireInstantiateLock();
if (acquireResult.acquired)
{
builder.CreateInstanceBy(CallTarget.M(constructor.value, null, actualArguments), true);
serviceForUsedContractsId.ReleaseInstantiateLock(builder.Context.AnalizeDependenciesOnly
? null
: builder.GetService());
}
else
builder.Reuse(acquireResult.alreadyConstructedService);
}
private HashSet<ImplementationType> GetImplementationTypes(ContainerService.Builder builder)
{
var result = new HashSet<ImplementationType>();
var candidates = builder.Configuration.ImplementationTypes ??
containerContext.typesList.InheritorsOf(builder.Type.GetDefinition());
var implementationTypesAreExplicitlyConfigured = builder.Configuration.ImplementationTypes != null;
foreach (var implType in candidates)
{
if (!implementationTypesAreExplicitlyConfigured)
{
var configuration = GetConfiguration(implType, builder.Context);
if (configuration.IgnoredImplementation || implType.IsDefined("IgnoredImplementationAttribute"))
result.Add(new ImplementationType
{
type = implType,
comment = "IgnoredImplementation",
accepted = false
});
}
if (!implType.IsGenericType)
{
if (!builder.Type.IsGenericType || builder.Type.IsAssignableFrom(implType))
result.Add(ImplementationType.Accepted(implType));
}
else if (!implType.ContainsGenericParameters)
result.Add(ImplementationType.Accepted(implType));
else
{
var mapped = containerContext.genericsAutoCloser.AutoCloseDefinition(implType);
foreach (var type in mapped)
if (builder.Type.IsAssignableFrom(type))
result.Add(ImplementationType.Accepted(type));
if (builder.Type.IsGenericType)
{
var implInterfaces = implType.ImplementationsOf(builder.Type.GetGenericTypeDefinition());
foreach (var implInterface in implInterfaces)
{
var closed = implType.TryCloseByPattern(implInterface, builder.Type);
if (closed != null)
result.Add(ImplementationType.Accepted(closed));
}
}
if (builder.Arguments == null)
continue;
var serviceConstructor = implType.GetConstructor();
if (!serviceConstructor.isOk)
continue;
foreach (var formalParameter in serviceConstructor.value.GetParameters())
{
if (!formalParameter.ParameterType.ContainsGenericParameters)
continue;
ValueWithType parameterValue;
if (!builder.Arguments.TryGet(formalParameter.Name, out parameterValue))
continue;
var parameterType = parameterValue.value == null ? parameterValue.type : parameterValue.value.GetType();
var implInterfaces = formalParameter.ParameterType.IsGenericParameter
? new List<Type>(1) {parameterType}
: parameterType.ImplementationsOf(formalParameter.ParameterType.GetGenericTypeDefinition());
foreach (var implInterface in implInterfaces)
{
var closedItem = implType.TryCloseByPattern(formalParameter.ParameterType, implInterface);
if (closedItem != null)
result.Add(ImplementationType.Accepted(closedItem));
}
}
}
}
return result;
}
public void ReleaseInstantiateLock(ContainerService result)
{
value = result;
Monitor.Exit(lockObject);
}
public void Reuse(ContainerService containerService)
{
target = containerService;
reused = true;
}
public void EnsureInitialized(ContainerContext containerContext, ContainerService root)
{
if (Status != ServiceStatus.Ok)
return;
if (!initialized)
lock (lockObject)
if (!initialized)
{
initializing = true;
try
{
if (dependencies != null)
foreach (var dependency in dependencies)
if (dependency.ContainerService != null)
dependency.ContainerService.EnsureInitialized(containerContext, root);
foreach (var instance in instances)
instance.EnsureInitialized(this, containerContext, root);
initialized = true;
}
finally
{
initializing = false;
}
}
}
public void UnionUsedContracts(ContainerService dependency)
{
if (dependency.UsedContracts == null)
return;
if (usedContractNames == null)
usedContractNames = new List<string>();
var contractsToAdd = dependency.UsedContracts
.Where(x => !usedContractNames.Contains(x, StringComparer.OrdinalIgnoreCase))
.Where(x => DeclaredContracts.Any(x.EqualsIgnoringCase));
foreach (var n in contractsToAdd)
usedContractNames.Add(n);
}
internal void Instantiate(ContainerService.Builder builder)
{
LifestyleAttribute lifestyle;
if (builder.Type.IsSimpleType())
builder.SetError("can't create simple type");
else if (builder.Type == typeof (IContainer))
builder.AddInstance(this, false, false);
else if (builder.Configuration.ImplementationAssigned)
builder.AddInstance(builder.Configuration.Implementation, builder.Configuration.ContainerOwnsInstance, true);
else if (builder.Configuration.Factory != null)
{
if (!builder.Context.AnalizeDependenciesOnly)
builder.CreateInstanceBy(CallTarget.F(builder.Configuration.Factory), builder.Configuration.ContainerOwnsInstance);
}
else if (builder.Type.IsValueType)
builder.SetError("can't create value type");
else if (builder.Type.IsGenericType && builder.Type.ContainsGenericParameters)
builder.SetError("can't create open generic");
else if (!builder.CreateNew && builder.Type.TryGetCustomAttribute(out lifestyle) &&
lifestyle.Lifestyle == Lifestyle.PerRequest)
{
const string messageFormat = "service [{0}] with PerRequest lifestyle can't be resolved, use Func<{0}> instead";
builder.SetError(string.Format(messageFormat, builder.Type.FormatName()));
}
else if (builder.Type.IsAbstract)
InstantiateInterface(builder);
else
InstantiateImplementation(builder);
}
public static bool TryCreate(ContainerService.Builder builder)
{
if (!builder.Type.IsDelegate())
return false;
if (!builder.Type.IsNestedPublic)
return false;
var invokeMethod = builder.Type.GetMethod("Invoke");
if (invokeMethod.ReturnType != builder.Type.DeclaringType)
return false;
var constructor = builder.Type.DeclaringType.GetConstructor();
if (!constructor.isOk)
{
builder.SetError(constructor.errorMessage);
return true;
}
var delegateParameters = invokeMethod.GetParameters();
var delegateParameterNameToIndexMap = new Dictionary<string, int>();
for (var i = 0; i < delegateParameters.Length; i++)
delegateParameterNameToIndexMap[delegateParameters[i].Name] = i;
var dynamicMethodParameterTypes = new Type[delegateParameters.Length + 1];
dynamicMethodParameterTypes[0] = typeof (object[]);
for (var i = 1; i < dynamicMethodParameterTypes.Length; i++)
dynamicMethodParameterTypes[i] = delegateParameters[i - 1].ParameterType;
var dynamicMethod = new DynamicMethod("", invokeMethod.ReturnType,
dynamicMethodParameterTypes, typeof (ReflectionHelpers), true);
var il = dynamicMethod.GetILGenerator();
var ctorParameters = constructor.value.GetParameters();
var notBoundCtorParameters = ctorParameters
.Where(x => x.ParameterType.IsSimpleType() && !delegateParameterNameToIndexMap.ContainsKey(x.Name))
.Select(x => x.Name)
.ToArray();
if (notBoundCtorParameters.Length > 0)
{
builder.SetError(string.Format("ctor has not bound parameters [{0}]", notBoundCtorParameters.JoinStrings(",")));
return true;
}
var serviceTypeToIndex = new Dictionary<Type, int>();
var services = new List<object>();
foreach (var p in ctorParameters)
{
int delegateParameterIndex;
if (delegateParameterNameToIndexMap.TryGetValue(p.Name, out delegateParameterIndex))
{
var delegateParameterType = delegateParameters[delegateParameterIndex].ParameterType;
if (!p.ParameterType.IsAssignableFrom(delegateParameterType))
{
const string messageFormat = "type mismatch for [{0}], delegate type [{1}], ctor type [{2}]";
builder.SetError(string.Format(messageFormat,
p.Name, delegateParameterType.FormatName(), p.ParameterType.FormatName()));
return true;
}
il.EmitLdArg(delegateParameterIndex + 1);
delegateParameterNameToIndexMap.Remove(p.Name);
}
else
{
int serviceIndex;
if (!serviceTypeToIndex.TryGetValue(p.ParameterType, out serviceIndex))
{
object value;
if (p.ParameterType == typeof (ServiceName))
value = null;
else
{
var dependency = builder.Context.Container.InstantiateDependency(p, builder).CastTo(p.ParameterType);
builder.AddDependency(dependency, false);
if (dependency.ContainerService != null)
builder.UnionUsedContracts(dependency.ContainerService);
if (builder.Status != ServiceStatus.Ok)
return true;
value = dependency.Value;
}
serviceIndex = serviceTypeToIndex.Count;
serviceTypeToIndex.Add(p.ParameterType, serviceIndex);
services.Add(value);
}
il.Emit(OpCodes.Ldarg_0);
il.EmitLdInt32(serviceIndex);
il.Emit(OpCodes.Ldelem_Ref);
il.Emit(p.ParameterType.IsValueType ? OpCodes.Unbox_Any : OpCodes.Castclass, p.ParameterType);
}
}
if (delegateParameterNameToIndexMap.Count > 0)
{
builder.SetError(string.Format("delegate has not used parameters [{0}]",
delegateParameterNameToIndexMap.Keys.JoinStrings(",")));
return true;
}
builder.EndResolveDependencies();
int serviceNameIndex;
if (serviceTypeToIndex.TryGetValue(typeof (ServiceName), out serviceNameIndex))
services[serviceNameIndex] = new ServiceName(builder.Type.DeclaringType, builder.FinalUsedContracts);
il.Emit(OpCodes.Newobj, constructor.value);
il.Emit(OpCodes.Ret);
var context = serviceTypeToIndex.Count == 0 ? null : services.ToArray();
builder.AddInstance(dynamicMethod.CreateDelegate(builder.Type, context), true);
return true;
}
internal ServiceDependency InstantiateDependency(ParameterInfo formalParameter, ContainerService.Builder builder)
{
ValueWithType actualArgument;
if (builder.Arguments != null && builder.Arguments.TryGet(formalParameter.Name, out actualArgument))
return containerContext.Constant(formalParameter, actualArgument.value);
var parameters = builder.Configuration.ParametersSource;
object actualParameter;
if (parameters != null && parameters.TryGet(formalParameter.Name, formalParameter.ParameterType, out actualParameter))
return containerContext.Constant(formalParameter, actualParameter);
var dependencyConfiguration = builder.Configuration.GetOrNull(formalParameter);
Type implementationType = null;
if (dependencyConfiguration != null)
{
if (dependencyConfiguration.ValueAssigned)
return containerContext.Constant(formalParameter, dependencyConfiguration.Value);
if (dependencyConfiguration.Factory != null)
{
var dependencyBuilder = new ContainerService.Builder(new ServiceName(formalParameter.ParameterType))
{
Context = builder.Context,
DependencyName = formalParameter.Name
};
builder.Context.Stack.Add(dependencyBuilder);
dependencyBuilder.CreateInstanceBy(CallTarget.F(dependencyConfiguration.Factory), true);
builder.Context.Stack.RemoveLast();
return dependencyBuilder.GetService().AsDependency(containerContext, formalParameter.Name, false);
}
implementationType = dependencyConfiguration.ImplementationType;
}
implementationType = implementationType ?? formalParameter.ParameterType;
FromResourceAttribute resourceAttribute;
if (implementationType == typeof (Stream) && formalParameter.TryGetCustomAttribute(out resourceAttribute))
{
var resourceStream = builder.Type.Assembly.GetManifestResourceStream(builder.Type, resourceAttribute.Name);
if (resourceStream == null)
return containerContext.Error(null, formalParameter.Name,
"can't find resource [{0}] in namespace of [{1}], assembly [{2}]",
resourceAttribute.Name, builder.Type, builder.Type.Assembly.GetName().Name);
return containerContext.Resource(formalParameter, resourceAttribute.Name, resourceStream);
}
var dependencyName = ServiceName.Parse(implementationType.UnwrapEnumerable(),
InternalHelpers.ParseContracts(formalParameter));
if (dependencyName.Type.IsSimpleType())
{
if (!formalParameter.HasDefaultValue)
return containerContext.Error(null, formalParameter.Name,
"parameter [{0}] of service [{1}] is not configured",
formalParameter.Name, builder.Type.FormatName());
return containerContext.Constant(formalParameter, formalParameter.DefaultValue);
}
var resultService = ResolveCore(dependencyName, false, null, builder.Context);
if (resultService.Status.IsBad())
return containerContext.ServiceError(resultService);
var isEnumerable = dependencyName.Type != implementationType;
if (isEnumerable)
return containerContext.Service(resultService, resultService.GetAllValues());
if (resultService.Status == ServiceStatus.NotResolved)
{
if (formalParameter.HasDefaultValue)
return containerContext.Service(resultService, formalParameter.DefaultValue);
if (formalParameter.IsDefined<OptionalAttribute>() || formalParameter.IsDefined("CanBeNullAttribute"))
return containerContext.Service(resultService, null);
return containerContext.NotResolved(resultService);
}
return resultService.AsDependency(containerContext, null, false);
}
internal ContainerService ResolveCore(ServiceName name, bool createNew, IObjectAccessor arguments, ResolutionContext context)
{
var pushedContracts = context.Contracts.Push(name.Contracts);
var declaredName = new ServiceName(name.Type, context.Contracts.Snapshot());
if (context.HasCycle(declaredName))
{
var message = string.Format("cyclic dependency for service [{0}], stack\r\n{1}",
declaredName.Type.FormatName(), context.FormatStack() + "\r\n\t" + declaredName);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
return(ContainerService.Error(declaredName, message));
}
if (!pushedContracts.isOk)
{
const string messageFormat = "contract [{0}] already declared, stack\r\n{1}";
var message = string.Format(messageFormat, pushedContracts.duplicatedContractName,
context.FormatStack() + "\r\n\t" + name);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
return(ContainerService.Error(name, message));
}
context.ConstructingServices.Add(declaredName);
ServiceConfiguration configuration = null;
Exception configurationException = null;
try
{
configuration = GetConfiguration(declaredName.Type, context);
}
catch (Exception e)
{
configurationException = e;
}
var actualName = configuration != null && configuration.FactoryDependsOnTarget && context.Stack.Count > 0
? declaredName.AddContracts(context.TopBuilder.Type.FormatName())
: declaredName;
ContainerServiceId id = null;
if (!createNew)
{
id = instanceCache.GetOrAdd(actualName, createId);
var acquireResult = id.AcquireInstantiateLock();
if (!acquireResult.acquired)
{
context.ConstructingServices.Remove(declaredName);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
return(acquireResult.alreadyConstructedService);
}
}
var builder = new ContainerService.Builder(actualName);
context.Stack.Add(builder);
builder.Context = context;
builder.DeclaredContracts = actualName.Contracts;
if (configuration == null)
{
builder.SetError(configurationException);
}
else
{
builder.SetConfiguration(configuration);
builder.ExpandedUnions = context.Contracts.TryExpandUnions(Configuration);
if (builder.ExpandedUnions.HasValue)
{
var poppedContracts = context.Contracts.PopMany(builder.ExpandedUnions.Value.contracts.Length);
foreach (var c in builder.ExpandedUnions.Value.contracts.CartesianProduct())
{
var childService = ResolveCore(new ServiceName(name.Type, c), createNew, arguments, context);
builder.LinkTo(containerContext, childService, null);
if (builder.Status.IsBad())
{
break;
}
}
context.Contracts.PushNoCheck(poppedContracts);
}
else
{
builder.CreateNew = createNew;
builder.Arguments = arguments;
Instantiate(builder);
}
}
context.ConstructingServices.Remove(declaredName);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
context.Stack.RemoveLast();
var result = builder.GetService();
if (id != null)
{
id.ReleaseInstantiateLock(builder.Context.AnalizeDependenciesOnly ? null : result);
}
return(result);
}
private void ApplySelectors(HashSet<ImplementationType> implementations, ContainerService.Builder builder)
{
if (builder.Configuration != ServiceConfiguration.empty)
return;
if (implementationSelectors.Count == 0)
return;
var selectorDecisions = new List<ImplementationSelectorDecision>();
var typesArray = implementations.Select(x => x.type).ToArray();
foreach (var s in implementationSelectors)
s(builder.Type, typesArray, selectorDecisions);
foreach (var decision in selectorDecisions)
{
var item = new ImplementationType
{
type = decision.target,
comment = decision.comment,
accepted = decision.action == ImplementationSelectorDecision.Action.Include
};
implementations.Replace(item);
}
}
