public int CompareTo(IDependency other)
{
var areEqual = (other.Name == this.Name && other.DependencyType == this.DependencyType);
if (areEqual)
return 0;
var otherHash = other.GetHashCode();
var thisHash = this.GetHashCode();
var isGreater = otherHash > thisHash;
return isGreater ? 1 : -1;
}
public int CompareTo(IDependency other)
{
var areEqual = (other.Name == this.Name && other.DependencyType == this.DependencyType);
if (areEqual)
{
return(0);
}
var otherHash = other.GetHashCode();
var thisHash = this.GetHashCode();
var isGreater = otherHash > thisHash;
return(isGreater ? 1 : -1);
}
/// <summary>
/// Defines the nested type that will instantiate the actual singleton service instance.
/// </summary>
/// <param name="module">The module that will host the singleton type.</param>
/// <param name="singletonType">The singleton type.</param>
/// <param name="instanceField">The field that will hold the singleton instance.</param>
/// <param name="serviceMap">The service map that contains the list of dependencies in the application.</param>
/// <param name="implementation">The implementation that will instantiate the dependency.</param>
/// <param name="dependency">The dependency that will be instantiated by the singleton.</param>
/// <param name="targetMethod">The method that will be used to instantiate the actual service instance.</param>
private void DefineNestedType(ModuleDefinition module, TypeDefinition singletonType, FieldDefinition instanceField, IDictionary <IDependency, IImplementation> serviceMap, IImplementation implementation, IDependency dependency, MethodDefinition targetMethod)
{
var objectType = module.ImportType(typeof(object));
var nestedName = string.Format("Nested-{0}", dependency.GetHashCode());
const TypeAttributes nestedAttributes = TypeAttributes.NestedFamORAssem | TypeAttributes.Sealed | TypeAttributes.AutoClass | TypeAttributes.Class | TypeAttributes.AnsiClass;
var nestedType = module.DefineClass(nestedName, "Hiro.Containers.Internal", nestedAttributes, objectType);
singletonType.NestedTypes.Add(nestedType);
nestedType.Fields.Add(instanceField);
// Emit the static constructor body
var cctor = DefineNestedConstructors(module, nestedType);
EmitSingletonInstantiation(dependency, implementation, serviceMap, instanceField, cctor, module, targetMethod);
}
/// <summary>
/// Emits a service as a singleton type.
/// </summary>
/// <param name="targetMethod">The <see cref="IMicroContainer.GetInstance"/> method implementation.</param>
/// <param name="dependency">The dependency that will be instantiated by the container.</param>
/// <param name="implementation">The implementation that will be used to instantiate the dependency.</param>
/// <param name="serviceMap">The service map the contains the current application dependencies.</param>
public void EmitService(MethodDefinition targetMethod, IDependency dependency,
IImplementation implementation, IDictionary <IDependency, IImplementation> serviceMap)
{
MethodDefinition getInstanceMethod = null;
var worker = targetMethod.GetILGenerator();
// Emit only one singleton per dependency and call
// the singleton GetInstance() method on every subsequent emit call
if (_entries.ContainsKey(dependency))
{
getInstanceMethod = _entries[dependency];
worker.Emit(OpCodes.Call, getInstanceMethod);
return;
}
var declaringType = targetMethod.DeclaringType;
var module = declaringType.Module;
var serviceType = dependency.ServiceType;
var typeName = serviceType.Name;
var singletonName = string.Format("{0}ServiceSingleton-{1}", typeName, dependency.GetHashCode());
const TypeAttributes typeAttributes = TypeAttributes.NotPublic | TypeAttributes.AutoClass | TypeAttributes.Sealed |
TypeAttributes.BeforeFieldInit;
var objectType = module.Import(typeof(object));
var singletonType = AddDefaultSingletonConstructor(module, singletonName, typeAttributes, objectType);
var instanceField = new FieldDefinition("__instance", FieldAttributes.Assembly | FieldAttributes.InitOnly | FieldAttributes.Static, objectType);
DefineNestedType(module, singletonType, instanceField, serviceMap, implementation, dependency,
targetMethod);
getInstanceMethod = DefineGetInstance(singletonType, worker, instanceField);
worker.Emit(OpCodes.Call, getInstanceMethod);
var serviceTypeRef = module.Import(serviceType);
worker.Emit(OpCodes.Unbox_Any, serviceTypeRef);
// Cache the singleton method
_entries[dependency] = getInstanceMethod;
}
/// <summary>
/// Emits a service as a singleton type.
/// </summary>
/// <param name="targetMethod">The <see cref="IMicroContainer.GetInstance"/> method implementation.</param>
/// <param name="dependency">The dependency that will be instantiated by the container.</param>
/// <param name="implementation">The implementation that will be used to instantiate the dependency.</param>
/// <param name="serviceMap">The service map the contains the current application dependencies.</param>
public void EmitService(MethodDefinition targetMethod, IDependency dependency,
IImplementation implementation, IDictionary<IDependency, IImplementation> serviceMap)
{
MethodDefinition getInstanceMethod = null;
var worker = targetMethod.GetILGenerator();
// Emit only one singleton per dependency and call
// the singleton GetInstance() method on every subsequent emit call
if (_entries.ContainsKey(dependency))
{
getInstanceMethod = _entries[dependency];
worker.Emit(OpCodes.Call, getInstanceMethod);
return;
}
var declaringType = targetMethod.DeclaringType;
var module = declaringType.Module;
var serviceType = dependency.ServiceType;
var typeName = serviceType.Name;
var singletonName = string.Format("{0}ServiceSingleton-{1}", typeName, dependency.GetHashCode());
const TypeAttributes typeAttributes = TypeAttributes.NotPublic | TypeAttributes.AutoClass | TypeAttributes.Sealed |
TypeAttributes.BeforeFieldInit;
var objectType = module.Import(typeof(object));
var singletonType = AddDefaultSingletonConstructor(module, singletonName, typeAttributes, objectType);
var instanceField = new FieldDefinition("__instance", FieldAttributes.Assembly | FieldAttributes.InitOnly | FieldAttributes.Static, objectType);
DefineNestedType(module, singletonType, instanceField, serviceMap, implementation, dependency,
targetMethod);
getInstanceMethod = DefineGetInstance(singletonType, worker, instanceField);
worker.Emit(OpCodes.Call, getInstanceMethod);
var serviceTypeRef = module.Import(serviceType);
worker.Emit(OpCodes.Unbox_Any, serviceTypeRef);
// Cache the singleton method
_entries[dependency] = getInstanceMethod;
}
/// <summary>
/// Emits the instructions that will instantiate the cached service implementation.
/// </summary>
/// <param name="dependency">The dependency that describes the service to be instantiated.</param>
/// <param name="serviceMap">The service map that contains the list of dependencies in the application.</param>
/// <param name="targetMethod">The target method.</param>
public void Emit(IDependency dependency, IDictionary <IDependency, IImplementation> serviceMap, MethodDefinition targetMethod)
{
var declaringType = targetMethod.DeclaringType;
var module = declaringType.Module;
// Use the ICache instance that resides within the current container
var cacheType = module.ImportType <ICache>();
var methodBody = targetMethod.Body;
var locals = methodBody.Variables;
var cacheVariable = new VariableDefinition(cacheType);
locals.Add(cacheVariable);
var worker = methodBody.GetILProcessor();
// var cache = (ICache)container.GetInstance(cacheType, string.Empty);
var getCacheMethod = typeof(CacheRegistry).GetMethod("GetCache");
var getCacheInstanceMethod = module.Import(getCacheMethod);
worker.Emit(OpCodes.Ldarg_0);
worker.Emit(OpCodes.Call, getCacheInstanceMethod);
worker.Emit(OpCodes.Stloc, cacheVariable);
worker.Emit(OpCodes.Ldloc, cacheVariable);
var createInstance = worker.Create(OpCodes.Nop);
worker.Emit(OpCodes.Brfalse, createInstance);
// if (cache != null) {
var getItemMethod = module.ImportMethod <ICache>("get_Item");
var cacheKey = string.Format("Hiro Service Instance (ServiceName: {0}, ServiceType: {1}, Hash: {2})",
dependency.ServiceName,
dependency.ServiceType,
dependency.GetHashCode());
// cachedResult = cache[cacheKey];
worker.Emit(OpCodes.Ldloc, cacheVariable);
worker.Emit(OpCodes.Ldstr, cacheKey);
worker.Emit(OpCodes.Callvirt, getItemMethod);
worker.Emit(OpCodes.Brfalse, createInstance);
// if (cachedResult != null)
// return cachedResult;
var endLabel = worker.Create(OpCodes.Nop);
var objectType = module.ImportType(typeof(object));
var resultVariable = new VariableDefinition(objectType);
methodBody.Variables.Add(resultVariable);
worker.Emit(OpCodes.Ldloc, cacheVariable);
worker.Emit(OpCodes.Ldstr, cacheKey);
worker.Emit(OpCodes.Callvirt, getItemMethod);
worker.Emit(OpCodes.Stloc, resultVariable);
worker.Emit(OpCodes.Br, endLabel);
worker.Append(createInstance);
// Instantiate the actual service instance
_actualImplementation.Emit(dependency, serviceMap, targetMethod);
worker.Emit(OpCodes.Stloc, resultVariable);
// Cache the results
worker.Emit(OpCodes.Ldloc, cacheVariable);
worker.Emit(OpCodes.Brfalse, endLabel);
var setItemMethod = module.ImportMethod <ICache>("set_Item");
// cache[cacheKey] = result;
worker.Emit(OpCodes.Ldloc, cacheVariable);
worker.Emit(OpCodes.Ldstr, cacheKey);
worker.Emit(OpCodes.Ldloc, resultVariable);
worker.Emit(OpCodes.Callvirt, setItemMethod);
worker.Append(endLabel);
worker.Emit(OpCodes.Ldloc, resultVariable);
}
/// <summary>
/// Emits the instructions that will instantiate the cached service implementation.
/// </summary>
/// <param name="dependency">The dependency that describes the service to be instantiated.</param>
/// <param name="serviceMap">The service map that contains the list of dependencies in the application.</param>
/// <param name="targetMethod">The target method.</param>
public void Emit(IDependency dependency, IDictionary<IDependency, IImplementation> serviceMap, MethodDefinition targetMethod)
{
var declaringType = targetMethod.DeclaringType;
var module = declaringType.Module;
// Use the ICache instance that resides within the current container
var cacheType = module.ImportType<ICache>();
var methodBody = targetMethod.Body;
var locals = methodBody.Variables;
var cacheVariable = new VariableDefinition(cacheType);
locals.Add(cacheVariable);
var worker = methodBody.GetILProcessor();
// Convert the token into a System.RuntimeType
var getTypeFromHandle = module.ImportMethod<Type>("GetTypeFromHandle");
// var cache = (ICache)container.GetInstance(cacheType, string.Empty);
var getCacheMethod = typeof(CacheRegistry).GetMethod("GetCache");
var getCacheInstanceMethod = module.Import(getCacheMethod);
worker.Emit(OpCodes.Ldarg_0);
worker.Emit(OpCodes.Call, getCacheInstanceMethod);
worker.Emit(OpCodes.Stloc, cacheVariable);
worker.Emit(OpCodes.Ldloc, cacheVariable);
var createInstance = worker.Create(OpCodes.Nop);
worker.Emit(OpCodes.Brfalse, createInstance);
// if (cache != null) {
var getItemMethod = module.ImportMethod<ICache>("get_Item");
var cacheKey = string.Format("Hiro Service Instance (ServiceName: {0}, ServiceType: {1}, Hash: {2})",
dependency.ServiceName,
dependency.ServiceType,
dependency.GetHashCode());
// cachedResult = cache[cacheKey];
worker.Emit(OpCodes.Ldloc, cacheVariable);
worker.Emit(OpCodes.Ldstr, cacheKey);
worker.Emit(OpCodes.Callvirt, getItemMethod);
worker.Emit(OpCodes.Brfalse, createInstance);
// if (cachedResult != null)
// return cachedResult;
var endLabel = worker.Create(OpCodes.Nop);
var objectType = module.ImportType(typeof(object));
var resultVariable = new VariableDefinition(objectType);
methodBody.Variables.Add(resultVariable);
worker.Emit(OpCodes.Ldloc, cacheVariable);
worker.Emit(OpCodes.Ldstr, cacheKey);
worker.Emit(OpCodes.Callvirt, getItemMethod);
worker.Emit(OpCodes.Stloc, resultVariable);
worker.Emit(OpCodes.Br, endLabel);
worker.Append(createInstance);
// Instantiate the actual service instance
_actualImplementation.Emit(dependency, serviceMap, targetMethod);
worker.Emit(OpCodes.Stloc, resultVariable);
// Cache the results
worker.Emit(OpCodes.Ldloc, cacheVariable);
worker.Emit(OpCodes.Brfalse, endLabel);
var setItemMethod = module.ImportMethod<ICache>("set_Item");
// cache[cacheKey] = result;
worker.Emit(OpCodes.Ldloc, cacheVariable);
worker.Emit(OpCodes.Ldstr, cacheKey);
worker.Emit(OpCodes.Ldloc, resultVariable);
worker.Emit(OpCodes.Callvirt, setItemMethod);
worker.Append(endLabel);
worker.Emit(OpCodes.Ldloc, resultVariable);
}
/// <summary>
/// Defines the nested type that will instantiate the actual singleton service instance.
/// </summary>
/// <param name="module">The module that will host the singleton type.</param>
/// <param name="singletonType">The singleton type.</param>
/// <param name="instanceField">The field that will hold the singleton instance.</param>
/// <param name="serviceMap">The service map that contains the list of dependencies in the application.</param>
/// <param name="implementation">The implementation that will instantiate the dependency.</param>
/// <param name="dependency">The dependency that will be instantiated by the singleton.</param>
/// <param name="targetMethod">The method that will be used to instantiate the actual service instance.</param>
private void DefineNestedType(ModuleDefinition module, TypeDefinition singletonType, FieldDefinition instanceField, IDictionary<IDependency, IImplementation> serviceMap, IImplementation implementation, IDependency dependency, MethodDefinition targetMethod)
{
var objectType = module.ImportType(typeof (object));
var nestedName = string.Format("Nested-{0}", dependency.GetHashCode());
const TypeAttributes nestedAttributes = TypeAttributes.NestedFamORAssem | TypeAttributes.Sealed | TypeAttributes.AutoClass | TypeAttributes.Class | TypeAttributes.AnsiClass;
var nestedType = module.DefineClass(nestedName, "Hiro.Containers.Internal", nestedAttributes, objectType);
singletonType.NestedTypes.Add(nestedType);
nestedType.Fields.Add(instanceField);
// Emit the static constructor body
var cctor = DefineNestedConstructors(module, nestedType);
EmitSingletonInstantiation(dependency, implementation, serviceMap, instanceField, cctor, module, targetMethod);
}
