jakarta.ws.rs vs javax.ws.rs
by Benno Fünfstück
Hello,
I see that resteasy uses the `javax.ws.rs` package. But the jakarta EE
jars provide `jakarta.ws.rs`. It seems that the two namespaces are not
compatible. What's the relation between them?
Best,
Benno
3 weeks, 6 days
Re: How to show helpful error messages for malformed @QueryParam?
by James Perkins
Adding the list back as I dropped it by mistake.
On Tue, Jan 25, 2022 at 5:50 PM Arwin Tio <arwin.tio(a)hotmail.com> wrote:
> Hi James,
>
> Feel free to publish this back to the mailing list, if you'd like.
> Thanks for the example, I have some follow-up questions:
>
>
> - How does the class get hooked up to the rest of the framework? Is it
> through the @Provider annotation?
>
> Yes. The @Provider annotation is what registers it.
>
> - Do you need to have multiple ParamConverterProviders? i.e. one for
> for integers, strings, lists, enums, etc? If you want to handle multiple
> types as parameters
>
> There are some default providers for sure and I wouldn't suggest doing one
for each type. In most cases it should just work. In this case it's
allowing Enum's to be supported by passing the Enum.name(), Enum.toString()
or the ordinal value. It's more convenience than anything.
>
> - I see in your example that there is a clause if (!rawType.isEnum()) -
> does that mean that every single ParamConverterProvider is applied to every
> single parameter? If you have 100 providers, could this cause performance
> issues? Is there a way to associate a converter provider to a particular
> type?
>
> To my knowledge yes, each ParamConverterProvider is invoked on each
parameter. I would think if you have a lot that could impact performance.
There is no way that I'm aware of to associate a converter with a type.
However, returning null is the way to stop processing a
ParamConverterProvider.
>
> Thanks for the help,
>
> Arwin
>
> ------------------------------
> *From:* James Perkins <jperkins(a)redhat.com>
> *Sent:* January 25, 2022 5:13 PM
> *To:* Arwin Tio <arwin.tio(a)hotmail.com>
> *Subject:* Re: [resteasy] How to show helpful error messages for
> malformed @QueryParam?
>
> Hi Arwin,
> I meant to reply to the list, but I guess I just replied directly instead
> :) I apologize for that. I'll keep it private for now in case you don't
> want any of the information public.
>
> What you could use is a ParamConverter. Something like this may work
> https://gist.github.com/jamezp/aad75e83760f565f15f4f0b54e202620.
>
>
> On Tue, Jan 25, 2022 at 5:03 PM Arwin Tio <arwin.tio(a)hotmail.com> wrote:
>
> Hi James,
>
> Thanks for the reply. Sorry, there is a mistake in my example. In my
> particular case, I have an endpoint that takes a "status" enum:
>
> localhost:8080/api/v1/users?status=creating
>
> But when I use the wrong status, it will throw an exception:
>
> java.lang.IllegalArgumentException: No enum constant com.data.model.UserStatus.creating
> at java.base/java.lang.Enum.valueOf(Enum.java:273)
>
>
> But the client will only receive a 404, with no error message. What I was
> trying to say in the original email was, if number_param received something
> like a String:
>
> localhost:8080/api/v1/users?number_param=asdf
>
> Then it will also return a 404 as a client error, due to this exception
>
> Caused by: java.lang.NumberFormatException: For input string: "asdf"
> at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:67)
>
>
> What I am trying to figure out, is, instead of an opaque 404, I would like
> to set it up to return helpful error messages to the client, such as:
>
>
> - 'number_param' received 'asdf', expected a number/integer instead of
> a string
> - 'status' received 'creating', valid values are ['created',
> 'pending', 'complete']
>
>
> Thanks,
>
> Arwin
>
>
> ------------------------------
> *From:* James Perkins <jperkins(a)redhat.com>
> *Sent:* January 25, 2022 4:31 PM
> *To:* Arwin Tio <arwin.tio(a)hotmail.com>
> *Subject:* Re: [resteasy] How to show helpful error messages for
> malformed @QueryParam?
>
> Hello Arwin,
> Sorry for the late reply. What kind of argument is "123"? What I mean is
> it a linked to an enum or special value of some sort?
>
>
> On Fri, Jan 21, 2022 at 9:05 AM Arwin Tio <arwin.tio(a)hotmail.com> wrote:
>
> As I understand it, a malformed @QueryParam will return a 404 with no
> message. For example, localhost:8080/api/v1/users?number_param=123 will
> respond with 404. Apparently, this is due to the JAX-RS spec:
>
> ```
> 3.2 Fields and Bean Properties
>
> if the field or property is annotated with @MatrixParam, @QueryParam or
> @PathParam then an implementation MUST generate an instance of
> NotFoundException (404 status) that wraps the thrown exception and no entity
> ```
>
> I would like the modify this behavior to:
>
> 1. Return a 400 status code, as I believe 404 causes confusion for users
> (they will think the endpoint doesn't exist)
> 2. Show a helpful error message, for example "'123' is an invalid input
> for number_param, expected number"
>
> I have read that the way to do this is with the ExceptionMapper<E extends
> Throwable> interface. Is this true? And if so, which Exception E should I
> use? Is there something like a QueryParamException?
>
> If it matters, I am using RESTEasy with Quarkus.
>
> Thanks,
>
> Arwin
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>
>
>
> --
> James R. Perkins
> JBoss by Red Hat
>
>
>
> --
> James R. Perkins
> JBoss by Red Hat
>
--
James R. Perkins
JBoss by Red Hat
3 weeks, 6 days
