/// <summary>
/// Register common exception handler chain which is invoked before the ones registered to exception type.
/// </summary>
/// <param name="configure">An <see cref="Action{IExceptionHandlerBuilder}"/> to build the exception handler chain.</param>
/// <returns>The current <see cref="IExceptionPolicyBuilder"/>.</returns>
/// <exception cref="ArgumentNullException">The <paramref name="configure"/> is null.</exception>
public IExceptionPolicyBuilder Pre(Action <IExceptionHandlerBuilder> configure)
{
Guard.ArgumentNotNull(configure, nameof(configure));
ExceptionHandlerBuilder builder = new ExceptionHandlerBuilder(this.ServiceProvider);
configure(builder);
_preHanlderBuilder.Use(async context =>
{
await builder.Build()(context);
});
return(this);
}
public void AddPreHandlers(Func <Exception, bool> predicate, Action <IExceptionHandlerBuilder> configure)
{
Guard.ArgumentNotNull(predicate, nameof(predicate));
Guard.ArgumentNotNull(configure, nameof(configure));
ExceptionHandlerBuilder builder = new ExceptionHandlerBuilder(this.ServiceProvider);
configure(builder);
_postHanlderBuilder.AddHandler(async context =>
{
if (predicate(context.Exception))
{
await builder.Build()(context);
}
});
}
/// <summary>
/// Register common exception handler chain which is invoked before the ones registered to exception type.
/// </summary>
/// <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>
/// <exception cref="ArgumentNullException">The <paramref name="predicate"/> is null.</exception>
/// <exception cref="ArgumentNullException">The <paramref name="configure"/> is null.</exception>
public IExceptionPolicyBuilder Pre(Func <Exception, bool> predicate, Action <IExceptionHandlerBuilder> configure)
{
Guard.ArgumentNotNull(predicate, nameof(predicate));
Guard.ArgumentNotNull(configure, nameof(configure));
ExceptionHandlerBuilder builder = new ExceptionHandlerBuilder(this.ServiceProvider);
configure(builder);
_preHanlderBuilder.Use(async context =>
{
if (predicate(context.Exception))
{
await builder.Build()(context);
}
});
return(this);
}
/// <summary>
/// Register exception handler chain for specified exception type.
/// </summary>
/// <param name="exceptionType">The type of exception handled by the registered exception handler chain.</param>
/// <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>
/// <exception cref="ArgumentNullException">The <paramref name="exceptionType"/> is null.</exception>
/// <exception cref="ArgumentNullException">The <paramref name="postHandlingAction"/> is null.</exception>
/// <exception cref="ArgumentNullException">The <paramref name="configure"/> is null.</exception>
public IExceptionPolicyBuilder For(Type exceptionType, PostHandlingAction postHandlingAction, Action <IExceptionHandlerBuilder> configure)
{
Guard.ArgumentNotNull(exceptionType, nameof(exceptionType));
Guard.ArgumentNotNull(configure, nameof(configure));
if (_policyEntries.Any(it => it.ExceptionType == exceptionType))
{
throw new ArgumentException(Resources.ExceptionDuplicateExceptionType.Fill(exceptionType.FullName), nameof(exceptionType));
}
ExceptionHandlerBuilder builder = new ExceptionHandlerBuilder(this.ServiceProvider);
configure(builder);
_policyEntries.Add(new ExceptionPolicyEntry(exceptionType, postHandlingAction, builder.Build()));
return(this);
}
/// <summary>
/// Build the exception policy.
/// </summary>
/// <returns>The exception policy to build.</returns>
public IExceptionPolicy Build()
{
return(new ExceptionPolicy(_policyEntries, _preHanlderBuilder.Build(), _postHanlderBuilder.Build()));
}
