private string CreateLogData(string methodStage, MethodExecutionArgs args)
{
var str = new StringBuilder();
str.AppendLine();
str.AppendLine(string.Format(methodStage + " {0} ", args.Method));
foreach (var argument in args.Arguments)
{
var argType = argument.GetType();
str.Append(argType.Name + ": ");
if (argType == typeof(string) || argType.IsPrimitive)
{
str.Append(argument);
}
else
{
foreach (var property in argType.GetProperties())
{
str.AppendFormat("{0} = {1}; ",
property.Name, property.GetValue(argument, null));
}
}
}
return str.ToString();
}
public override void OnSuccess(MethodExecutionArgs args)
{
for (int i = 0; i < args.Arguments.Count; i++)
{
if (args.Arguments[i] is int) args.Arguments[i] = -1;
else if (args.Arguments[i] is string) args.Arguments[i] = "I changed your value";
}
}
public BoundaryAspectGenerator(object instance, DynamicMetaObject metaObj, IEnumerable<OnMethodBoundaryAspect> aspects,
MethodInfo method, IEnumerable<DynamicMetaObject> args, IEnumerable<Type> argsTypes)
{
_rule = metaObj.Restrictions;
var methExecArgs = new MethodExecutionArgs(instance, method, new Arguments(args.Select(x => x.Value).ToArray()));
_aspectCalls = new AspectCalls(metaObj.Expression, aspects, args, methExecArgs, argsTypes.Any(t => t.IsByRef));
}
public override void OnException(MethodExecutionArgs args)
{
var str = new StringBuilder();
str.AppendLine();
str.Append(args.Exception.Message);
str.AppendLine();
if (args.Instance != null)
{
var instType = args.Instance.GetType();
str.AppendFormat("Type = {0}; ", instType.Name);
foreach (var property in instType.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly))
{
str.AppendFormat("{0} = {1}; ", property.Name, property.GetValue(args.Instance, null));
}
}
str.AppendLine();
Console.WriteLine(str.ToString());
args.FlowBehavior = FlowBehavior.RethrowException;
}
/// <summary>
/// When an exception is happened then this method will be called.
/// This is a perfect place to log the error messages in an generic way and do something useful with that information.
/// </summary>
/// <param name="args">Method arguments including return value and all necessary info.</param>
public virtual void OnException(MethodExecutionArgs args)
{ }
/// <summary>
/// Method executed after the body of method to which this aspect is applied,
/// but only when the method successfully returns.
/// </summary>
/// <param name="args">Method arguments including return value and all necessary info.</param>
public virtual void OnSuccess(MethodExecutionArgs args)
{ }
/// <summary>
/// Method executed after the body of method to which this aspect is applied
/// (this method is invoked from the finally block, it's mean that this method will be invoked in any way).
/// This is a good place where to log the return value, inform other applications that the method has finished the execution.
/// </summary>
/// <param name="args">Method arguments including return value and all necessary info.</param>
public virtual void OnExit(MethodExecutionArgs args)
{ }
/// <summary>
/// Method executed before the body of method to which this aspect is applied.
/// OnEntry method is a perfect place where to implement the logic such as input parameters logging, caching, authentication/authorization.
/// </summary>
/// <param name="args">Method arguments including return value and all necessary info.</param>
public virtual void OnEntry(MethodExecutionArgs args)
{ }
public override void OnSuccess(MethodExecutionArgs args)
{
var testEntity = (TestEntity)args.Arguments[0];
testEntity.Name = "KingAOP_OnSuccess";
testEntity.Number = 100;
}
public override void OnSuccess(MethodExecutionArgs args)
{
args.ReturnValue = (int)args.ReturnValue + 1;
}
public override void OnSuccess(MethodExecutionArgs args)
{
args.Arguments[0] = (int)args.Arguments[0] + 1;
}
public override void OnEntry(MethodExecutionArgs args)
{
Console.WriteLine("OnEntry: Hello KingAOP");
}
public override void OnSuccess(MethodExecutionArgs args)
{
Console.WriteLine("OnSuccess: Hello KingAOP");
}
public override void OnEntry(MethodExecutionArgs args)
{
string logData = CreateLogData("Entering", args);
Console.WriteLine(logData);
}
public override void OnEntry(MethodExecutionArgs args)
{
var entity = (TestEntity)args.Arguments[0];
entity.Name = "ChangedName";
entity.Number = 999;
}
public AspectCalls(Expression origMethod, IEnumerable<OnMethodBoundaryAspect> aspects,
IEnumerable<DynamicMetaObject> args, MethodExecutionArgs methExecArgs, bool isByRefArgs)
: this()
{
_origMethod = origMethod;
_args = args;
MethodExecutionArgs = methExecArgs;
_isByRefArgs = isByRefArgs;
ArgsExpression = Expression.Constant(methExecArgs);
RetMethodValue = Expression.Parameter(typeof(object));
foreach (var aspect in aspects)
{
EntryCalls.Add(GenerateCall("OnEntry", aspect));
SuccessCalls.Add(GenerateCall("OnSuccess", aspect));
ExceptionCalls.Add(GenerateCall("OnException", aspect));
ExitCalls.Add(GenerateCall("OnExit", aspect));
}
OriginalCall = GenerateOriginalCall();
}
