/// <summary>
/// Gets a colection of all the interceptors associated with the current executing method
/// </summary>
/// <param name="invocation">current invocation</param>
/// <param name="serviceProvider">service provider instance</param>
/// <param name="proxyConfiguration">Proxy Configuration</param>
/// <returns><see cref="Dictionary{TKey,TValue}"/> of all configured interceptors for this method</returns>
internal static List <InvocationContext> GetInterceptorMetadataForMethod(IInvocation invocation, IServiceProvider serviceProvider, SimpleProxyConfiguration proxyConfiguration)
{
//Creates the interceptor list to store the configured interceptors
var interceptorList = new List <InvocationContext>();
//Get the Attributes applied to the method being invoked
var methodAttributes = invocation
.MethodInvocationTarget
.GetCustomAttributes()
.Where(p => p.GetType().IsSubclassOf(typeof(MethodInterceptionAttribute)))
.Cast <MethodInterceptionAttribute>();
var index = 0;
foreach (var methodAttribute in methodAttributes)
{
// Get the interceptor that is bound to the attribute
var interceptorType = proxyConfiguration.ConfiguredInterceptors.FirstOrDefault(p => p.AttributeType == methodAttribute.GetType())?.InterceptorType;
if (interceptorType == null)
{
if (proxyConfiguration.IgnoreInvalidInterceptors)
{
continue;
}
throw new InvalidInterceptorException($"The Interceptor Attribute '{methodAttribute}' is applied to the method, but there is no configured binterceptor to handle it");
}
// Use the serviceProvider to Create the Interceptor instance so you can inject dependencies into the constructor
var instance = (IMethodInterceptor)ActivatorUtilities.GetServiceOrCreateInstance(serviceProvider, interceptorType);
//New InvocationContext instance
var context = new InvocationContext
{
Attribute = methodAttribute,
Interceptor = instance,
Invocation = invocation,
Order = index,
ServiceProvider = serviceProvider
};
interceptorList.Add(context);
index += 1;
}
//Returns the list of configured interceptors
return(interceptorList);
}
/// <summary>
/// Initialises a new instance of the MasterProxy that wraps an object
/// </summary>
/// <param name="serviceProvider">Services Collection</param>
/// <param name="proxyGenerator">Proxy Generator instance</param>
/// <param name="config">Proxy Configuration</param>
public ProxyFactory(IServiceProvider serviceProvider, IProxyGenerator proxyGenerator, SimpleProxyConfiguration config)
{
this.proxyConfiguration = config;
this.proxyGenerator = proxyGenerator;
this.serviceProvider = serviceProvider;
}
/// <summary>
/// Initialises a new instance of the <see cref="CoreInterceptor"/> class
/// </summary>
/// <param name="serviceProvider">Service Provider</param>
/// <param name="proxyConfiguration">Proxy Configuration</param>
public CoreInterceptor(IServiceProvider serviceProvider, SimpleProxyConfiguration proxyConfiguration)
{
this.serviceProvider = serviceProvider;
this.proxyConfiguration = proxyConfiguration;
}
