public static void EnsureHandler <TException, THandler>(
this IExceptionPolicyBuilder builder, int index = -1)
where THandler : class, IExceptionHandler
where TException : Exception
{
builder.Options.Value.EnsureHandler(typeof(TException), typeof(THandler), index);
builder.Services.TryAddSingleton <THandler>();
}
private static void BuildPolicy(IExceptionPolicyBuilder builder, PolicyConfiguration config, IDictionary <string, IExceptionFilter> filters)
{
foreach (var it in config.PreHandlers)
{
var handlerConfig = GetHandlerConfiguration(it.HandlerType);
var filterableConfig = it as FilterableHandlerConfiguration;
if (null == filterableConfig)
{
builder.Pre(handlerBuilder => handlerConfig.Use(handlerBuilder, _ => true, it.Arguments.ToDictionary(item => item.Name, item => item.Value)));
}
else
{
builder.Pre(handlerBuilder => handlerConfig.Use(handlerBuilder, context => filters[filterableConfig.Filter].Match(context), it.Arguments.ToDictionary(item => item.Name, item => item.Value)));
}
}
foreach (var it in config.PostHandlers)
{
var handlerConfig = GetHandlerConfiguration(it.HandlerType);
var filterableConfig = it as FilterableHandlerConfiguration;
if (null == filterableConfig)
{
builder.Post(handlerBuilder => handlerConfig.Use(handlerBuilder, _ => true, it.Arguments.ToDictionary(item => item.Name, item => item.Value)));
}
else
{
builder.Post(handlerBuilder => handlerConfig.Use(handlerBuilder, context => filters[filterableConfig.Filter].Match(context), it.Arguments.ToDictionary(item => item.Name, item => item.Value)));
}
}
foreach (var entry in config.PolicyEntries)
{
builder.For(entry.ExceptionType, entry.PostHandlingAction, handlerBuilder => {
foreach (var it in entry.Handlers)
{
var handlerConfig = GetHandlerConfiguration(it.HandlerType);
var filterableConfig = it as FilterableHandlerConfiguration;
if (null == filterableConfig)
{
handlerConfig.Use(handlerBuilder, _ => true, it.Arguments.ToDictionary(item => item.Name, item => item.Value));
}
else
{
handlerConfig.Use(handlerBuilder, context => filters[filterableConfig.Filter].Match(context), it.Arguments.ToDictionary(item => item.Name, item => item.Value));
}
}
});
}
}
public static IExceptionPolicyBuilder BuildEdamosDefault(this IExceptionPolicyBuilder builder)
{
builder.For <EdamosApiException>()
.Log(lo =>
{
lo.EventIdFactory = (c, e) => e.EventId;
lo.Level = (c, e) => e.LogLevel;
lo.StateFactory = (c, e, o) => new FormattedLogValues(
$"{e.Message}. Details: {e.DetailsFormat}", e.DetailsParams.ToArray());
lo.Category = (c, e) => Consts.Logs.EdamosApiCategory;
})
.Response(e => (int)e.StatusCode)
.ClearCacheHeaders()
.WithObjectResult(
(r, e) => new EdamosApiError
{
StatusCode = r.HttpContext.Response.StatusCode,
Message = e.Message,
TraceIdentifier = r.HttpContext.TraceIdentifier
})
.Handled();
builder.For <Exception>()
.Log(lo =>
{
lo.Category = (c, e) => Consts.Logs.EdamosApiCategory;
lo.Level = (c, e) => LogLevel.Error;
lo.EventIdFactory = (c, e) => LogEvents.UnhandledException;
})
.Response(null, ResponseAlreadyStartedBehaviour.GoToNextHandler)
.ClearCacheHeaders()
.WithObjectResult((r, e) => new EdamosApiError
{
StatusCode = r.HttpContext.Response.StatusCode,
Message = "Internal Server Error",
TraceIdentifier = r.HttpContext.TraceIdentifier
})
.Handled();
return(builder);
}
/// <summary>
/// Register a common exception handler chain.
/// </summary>
/// <param name="builder">The <see cref="IExceptionPolicyBuilder"/> to which the common exception handler chain is registered.</param>
/// <param name="configure">An <see cref="Action{IExceptionHandlerBuilder}"/> to build the exception handler chain.</param>
/// <returns>The current <see cref="IExceptionPolicyBuilder"/>.</returns>
public static IExceptionPolicyBuilder Configure(this IExceptionPolicyBuilder builder, Action <IExceptionHandlerBuilder> configure)
{
Guard.ArgumentNotNull(builder, nameof(builder));
return(builder.Post(configure));
}
/// <summary>
/// Register exception handler chain for specified exception type.
/// </summary>
/// <param name="builder">The <see cref="IExceptionPolicyBuilder"/> to which the type specific hanlder chain is registered.</param>
/// <typeparam name="TException">The type of exception to handle.</typeparam>
/// <param name="postHandlingAction">Determining what action should occur after an exception is handled by the configured exception handling chain.</param>
/// <param name="configure">An <see cref="Action{IExceptionHandlerBuilder}"/> to build the exception handler chain.</param>
/// <returns>The current <see cref="IExceptionPolicyBuilder"/>.</returns>
public static IExceptionPolicyBuilder For <TException>(this IExceptionPolicyBuilder builder, PostHandlingAction postHandlingAction, Action <IExceptionHandlerBuilder> configure)
where TException : Exception
{
Guard.ArgumentNotNull(builder, nameof(builder));
return(builder.For(typeof(TException), postHandlingAction, configure));
}
internal ExceptionMapping(IExceptionPolicyBuilder builder)
{
Builder = builder ?? throw new ArgumentNullException(nameof(builder));
}
public static IExceptionMapping <TException> For <TException>(
this IExceptionPolicyBuilder builder, int index = -1) where TException : Exception
{
builder.Options.EnsureException(typeof(TException), index);
return(new ExceptionMapping <TException>(builder));
}
/// <summary>
/// Register a common exception handler chain.
/// </summary>
/// <param name="builder">The <see cref="IExceptionPolicyBuilder"/> to which the common exception handler chain is registered.</param>
/// <param name="predicate">A filter used to determine whether the registered exception handler should be invoked.</param>
/// <param name="configure">An <see cref="Action{IExceptionHandlerBuilder}"/> to build the exception handler chain.</param>
/// <returns>The current <see cref="IExceptionPolicyBuilder"/>.</returns>
public static IExceptionPolicyBuilder Use(this IExceptionPolicyBuilder builder, Func <Exception, bool> predicate, Action <IExceptionHandlerBuilder> configure)
{
Guard.ArgumentNotNull(builder, nameof(builder));
return(builder.Post(predicate, configure));
}
