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);
}
}
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 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);
}
}
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);
}
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;
}
public ContainerService Instantiate(Type type, bool crearteNew, IObjectAccessor arguments)
{
var builder = new ContainerService.Builder(type, this, crearteNew, arguments);
if (builder.Status != ServiceStatus.Ok)
return builder.Build();
var declaredName = builder.GetDeclaredName();
if (!constructingServices.Add(declaredName))
{
var previous = GetTopBuilder();
if (previous == null)
throw new InvalidOperationException(string.Format("assertion failure, service [{0}]", declaredName));
var message = string.Format("cyclic dependency {0}{1} -> {0}",
type.FormatName(), previous.Type == type ? "" : " ...-> " + previous.Type.FormatName());
var cycleBuilder = new ContainerService.Builder(type, this, false, null);
cycleBuilder.SetError(message);
return cycleBuilder.Build();
}
stack.Add(builder);
var expandResult = TryExpandUnions(Container.Configuration);
if (expandResult != null)
{
var poppedContracts = Contracts.PopMany(expandResult.Length);
foreach (var c in expandResult.CartesianProduct())
{
var childService = Resolve(new ServiceName(builder.Type, c));
builder.LinkTo(Container.containerContext, childService, null);
if (builder.Status.IsBad())
break;
}
Contracts.AddRange(poppedContracts);
}
else
Container.Instantiate(builder);
stack.RemoveLast();
constructingServices.Remove(declaredName);
return builder.Build();
}
public ContainerService Resolve(ServiceName name)
{
if (name.Contracts.Length == 0)
return Container.ResolveSingleton(name.Type, this);
var pushedCount = 0;
foreach (var newContract in name.Contracts)
{
foreach (var c in Contracts)
if (newContract.EqualsIgnoringCase(c))
{
var resultBuilder = new ContainerService.Builder(name.Type, this, false, null);
const string messageFormat = "contract [{0}] already declared, all declared contracts [{1}]";
resultBuilder.SetError(string.Format(messageFormat, newContract, InternalHelpers.FormatContractsKey(Contracts)));
Contracts.RemoveLast(pushedCount);
return resultBuilder.Build();
}
Contracts.Add(newContract);
pushedCount++;
}
var result = Container.ResolveSingleton(name.Type, this);
Contracts.RemoveLast(name.Contracts.Length);
return result;
}
internal ServiceDependency InstantiateDependency(ParameterInfo formalParameter, ContainerService.Builder builder)
{
ValueWithType actualArgument;
if (builder.Arguments != null && builder.Arguments.TryGet(formalParameter.Name, out actualArgument))
return ServiceDependency.Constant(formalParameter, actualArgument.value);
var parameters = builder.Configuration.ParametersSource;
object actualParameter;
if (parameters != null && parameters.TryGet(formalParameter.Name, formalParameter.ParameterType, out actualParameter))
return ServiceDependency.Constant(formalParameter, actualParameter);
var dependencyConfiguration = builder.Configuration.GetOrNull(formalParameter);
Type implementationType = null;
if (dependencyConfiguration != null)
{
if (dependencyConfiguration.ValueAssigned)
return ServiceDependency.Constant(formalParameter, dependencyConfiguration.Value);
if (dependencyConfiguration.Factory != null)
{
var dependencyBuilder = new ContainerService.Builder(formalParameter.ParameterType, builder.Context, false, null);
dependencyBuilder.CreateInstanceBy(() => dependencyConfiguration.Factory(this), true);
return dependencyBuilder.Build().AsSingleInstanceDependency(formalParameter.Name);
}
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 ServiceDependency.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 ServiceDependency.Resource(formalParameter, resourceAttribute.Name, resourceStream);
}
var dependencyName = ServiceName.Parse(implementationType.UnwrapEnumerable(), false,
InternalHelpers.ParseContracts(formalParameter));
ServiceConfiguration interfaceConfiguration;
try
{
interfaceConfiguration = GetConfiguration(dependencyName.Type, builder.Context);
}
catch (Exception e)
{
var dependencyService = new ContainerService.Builder(dependencyName.Type, builder.Context, false, null);
dependencyService.SetError(e);
return ServiceDependency.ServiceError(dependencyService.Build());
}
if (interfaceConfiguration.FactoryWithTarget != null)
dependencyName = dependencyName.AddContracts(builder.Type.FormatName());
if (dependencyName.Type.IsSimpleType())
{
if (!formalParameter.HasDefaultValue)
return ServiceDependency.Error(null, formalParameter.Name,
"parameter [{0}] of service [{1}] is not configured",
formalParameter.Name, builder.Type.FormatName());
return ServiceDependency.Constant(formalParameter, formalParameter.DefaultValue);
}
var resultService = builder.Context.Resolve(dependencyName);
if (resultService.Status.IsBad())
return ServiceDependency.ServiceError(resultService);
var isEnumerable = dependencyName.Type != implementationType;
if (isEnumerable)
return ServiceDependency.Service(resultService, resultService.GetAllValues(containerContext));
if (resultService.Status == ServiceStatus.NotResolved)
{
if (formalParameter.HasDefaultValue)
return ServiceDependency.Service(resultService, formalParameter.DefaultValue);
if (formalParameter.IsDefined<OptionalAttribute>() || formalParameter.IsDefined("CanBeNullAttribute"))
return ServiceDependency.Service(resultService, null);
return ServiceDependency.NotResolved(resultService);
}
return resultService.AsSingleInstanceDependency(null);
}
public static bool TryCreate(ContainerService.Builder builder)
{
if (!builder.Type.IsDelegate() || builder.Type.FullName.StartsWith("System.Func`"))
{
return(false);
}
var invokeMethod = builder.Type.GetMethod("Invoke");
if (!builder.Type.IsNestedPublic)
{
builder.SetError(string.Format("can't create delegate [{0}]. must be nested public", builder.Type.FormatName()));
return(true);
}
if (invokeMethod.ReturnType != builder.Type.DeclaringType)
{
builder.SetError(string.Format("can't create delegate [{0}]. return type must match declaring", builder.Type.FormatName()));
return(true);
}
const BindingFlags ctorBindingFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
var constructors = builder.Type.DeclaringType.GetConstructors(ctorBindingFlags)
.Where(x => Match(invokeMethod, x))
.ToArray();
if (constructors.Length == 0)
{
builder.SetError("can't find matching ctor");
return(true);
}
if (constructors.Length > 1)
{
builder.SetError("more than one matched ctors found");
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 = constructors[0].GetParameters();
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, constructors[0]);
il.Emit(OpCodes.Ret);
var context = serviceTypeToIndex.Count == 0 ? null : services.ToArray();
builder.AddInstance(dynamicMethod.CreateDelegate(builder.Type, context), true, false);
return(true);
}
