kotlinlang #spring

I want to upgrade my project to spring boot 2.0 but that also includes updating the mongodb driver, and my mongo testing library (fongo) doesn't support the 3.6 driver. Any alternatives?

poohbar

03/05/2018, 3:34 PM

Not using mongo?

💯 2

🙃 1

Pere Casafont

03/05/2018, 4:34 PM

that's definitely the way to go, we want to move to cassandra, but the codebase is relatively big and we don't have resources now to make that big move 😛

dmnk_89

03/05/2018, 4:36 PM

https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-nosql.html#boot-features-mongo-embedded

👍 1

Pere Casafont

03/05/2018, 4:57 PM

thanks, I recall having failed at using this one but it will be worth another try

sdeleuze

03/06/2018, 10:22 AM

See also https://github.com/mixitconf/mixit for a Kotlin project using embedded Mongo for tests and dev env.

masted

03/07/2018, 7:57 AM

Hello guys, I have a kinda strange, mostly theoretical question: is there a way to get a value of top-level property as a part of autowired list? For example:

Copy code

@Component
val myTopLevelProperty = "Some Data Here"

@Configuration
class SomeConfig {
     @Autowired
     private lateinit var autowiredList: List<String>
}

enleur

03/12/2018, 11:14 PM

waiting for https://jira.spring.io/browse/SPR-15413, it’s going to be really cool

👍 2

sendilkumarn [JHipster]

03/12/2018, 11:48 PM

wow nice 🙂

Nikartix

03/14/2018, 8:32 AM

Hi everyone!

Nikartix

03/15/2018, 7:49 AM

Hello, I want to pass GET request parameter as an object, But I want custom name for each field ? Passing parameters with field name works but @JsonProperty annotation doesn't work ? Is this a Kotlin issue ? Are there some workarounds ?

Nikartix

03/15/2018, 7:56 AM

Or how to make field not to be required and have default value ?

poohbar

03/15/2018, 12:35 PM

@RequestParam(name = "custom-name", required = false)

Czar

03/15/2018, 12:58 PM

@RequestParam(name = "custom-name", required = false, defaultValue="your_default")

Last time I checked Kotlin native default parameters did not work, but

defaultValue

in annotation did.

sdeleuze

03/15/2018, 2:15 PM

if you don't provide default value like in @poohbar example it is probably better to annotate a nullable parameter and avoid specifying explicitly

required = false

since it will be inferred from Kotlin type system :

@RequestParam("custom-name") foo: Foo?

poohbar

03/15/2018, 2:16 PM

@sdeleuze huh, thats pretty awesome.. i really need to do a whole spring app in pure kotlin, I am missing out!

👍 1

diesieben07

03/15/2018, 2:18 PM

Would be really nice to support Kotlin's default parameters for this. Is there an issue/pr already?

sdeleuze

03/15/2018, 2:21 PM

What is the use case for Kotlin's default parameters, could you give more details ?

diesieben07

03/15/2018, 2:23 PM

fun get(@RequestParam limit: Int = 20)

looks more natural to me than

fun get(@RequestParam(defaultValue = "20") limit: Int)

. The latter is also not really type-safe, since

defaultValue

is always a String.

diesieben07

03/15/2018, 2:24 PM

Thinking about it though, it sounds like a nightmare to implement considering how default values on parameters are implemented. It would require using Kotlin reflection with

callBy

to call the method instead of normal method call. I am not sure if it is at all possible to fit that onto the chain of method interceptors that spring uses.

diesieben07

03/15/2018, 2:54 PM

Looking at

InvocableHandlerMethod

it seems somewhat possible.

sdeleuze

03/15/2018, 3:07 PM

Ok I see, please create an issue and send the link here

diesieben07

03/15/2018, 3:22 PM

@sdeleuze Done: https://jira.spring.io/browse/SPR-16598

👍 1