kotlinlang #spring

client.execute("UPDATE .....")
            .bind(...).fetch().rowsUpdated()
            .then(
                client.execute("UPDATE ......").bind(...).fetch().rowsUpdated()
            ).then().`as`(operator::transactional).awaitSingle()

Is this correct way?

sdeleuze

08/09/2019, 5:46 PM

With Coroutines you just have too call 2 « await* » operation sequentially no need for then.

Robert Jaros

08/09/2019, 6:20 PM

but sequential calls are not executed inside a single transaction

Robert Jaros

08/09/2019, 6:23 PM

only when I use

then

they are

Robert Jaros

08/09/2019, 6:24 PM

perhaps there is other way to "open" a transaction before such sequence, but I don't know how to do it

sdeleuze

08/09/2019, 8:52 PM

I will have a deeper look next week

corneil

08/12/2019, 2:21 PM

I'm having trouble with Spring Spel expression parser: https://gist.github.com/corneil/6b3712e7418068b9e5eba85c04675718

corneil

08/12/2019, 2:22 PM

Fails with:

Copy code

org.springframework.expression.spel.SpelEvaluationException: EL1008E: Property or field 'properties' cannot be found on object of type 'kotlin.reflect.jvm.internal.KClassImpl' - maybe not public or not valid?

	at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:217)
	at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:104)
	at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:91)
	at org.springframework.expression.spel.ast.CompoundExpression.getValueRef(CompoundExpression.java:53)
	at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:89)
	at org.springframework.expression.spel.ast.OpPlus.getValueInternal(OpPlus.java:83)
	at org.springframework.expression.spel.ast.OpPlus.getValueInternal(OpPlus.java:83)
	at org.springframework.expression.spel.ast.OpPlus.getValueInternal(OpPlus.java:83)
	at org.springframework.expression.spel.ast.OpPlus.getValueInternal(OpPlus.java:83)
	at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:109)
	at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:328)

SpelTests.kt

looki

08/19/2019, 11:23 AM

Not a Kotlin question per se, but is Gemini Blueprint still used to modularize Spring Applications? Or is there a better way now?

tjb

08/20/2019, 2:10 PM

hey friends i have a quick question i cannot find from googling

tjb

08/20/2019, 2:10 PM

why does

mainClassName

need

Kt

at the end?

tjb

08/20/2019, 2:10 PM

my guess is that spring requires it because if the project contains both java and kotlin files it gets confused. but why would this be so if you specify the path?

diesieben07

08/20/2019, 2:11 PM

Kotlin generates a class named

FooKt

to contain any top-level functions of a file named

foo.kt

. You can adjust this using

@file:JvmName

if you want

tjb

08/20/2019, 2:12 PM

tjb

08/20/2019, 2:14 PM

can you describe what you mean by top level functions? Answered myself: https://blog.jetbrains.com/kotlin/2015/06/improving-java-interop-top-level-functions-and-properties/

tjb

08/20/2019, 2:17 PM

thank you @diesieben07!!

Robert Menke

08/25/2019, 6:03 AM

The error I was receiving was

NoSuchBeanDefinitionException: No qualifying bean of type 'com.my.package.user.UserService' available

Lt. Templeton Peck

08/28/2019, 2:35 PM

I have a issue regarding data classes with constructor params working differently to properties declared in the class body with a

@ModelAttribute

rest controller method

Lt. Templeton Peck

08/28/2019, 2:36 PM

Copy code

@RestController
class ParamController {

    @GetMapping
    @ResponseStatus(HttpStatus.OK)
    fun query(@ModelAttribute query: ParamQuery) = query.ids1 + query.ids2

}

data class ParamQuery(
    val ids1: Set<String> = setOf()
) {
    var ids2: Set<String> = setOf()
}

Lt. Templeton Peck

08/28/2019, 2:37 PM

This test passes

Copy code

@Test
    fun `multiple params returns 4 entries`() {
        mockMvc.perform(
            MockMvcRequestBuilders.get("/v1")
                .param("ids1", "A", "B")
                .param("ids2", "C", "D")
                .contentType(MediaType.APPLICATION_JSON)
        )
            .andExpect(status().isOk)
            .andExpect(jsonPath("$.length()", equalTo(4)))
            .andExpect(jsonPath("$[0]", equalTo("A")))
            .andExpect(jsonPath("$[1]", equalTo("B")))
            .andExpect(jsonPath("$[2]", equalTo("C")))
            .andExpect(jsonPath("$[3]", equalTo("D")))
    }

Lt. Templeton Peck

08/28/2019, 2:37 PM

This test fails

Copy code

@Test
    fun `multiple params comma-separated returns 4 entries`() {
        mockMvc.perform(
            MockMvcRequestBuilders.get("/v1")
                .param("ids1", "A,B")
                .param("ids2", "C,D")
                .contentType(MediaType.APPLICATION_JSON)
        )
            .andExpect(status().isOk)
            .andExpect(jsonPath("$.length()", equalTo(4)))
            .andExpect(jsonPath("$[0]", equalTo("A")))
            .andExpect(jsonPath("$[1]", equalTo("B")))
            .andExpect(jsonPath("$[2]", equalTo("C")))
            .andExpect(jsonPath("$[3]", equalTo("D")))
    }

Lt. Templeton Peck

08/28/2019, 2:38 PM

The 2nd test returns a body of

["A,B","C","D"]

Lt. Templeton Peck

08/28/2019, 2:39 PM

whereas the 1st test returns a body of

["A","B","C","D"]

Lt. Templeton Peck

08/28/2019, 2:39 PM

It's as least inconsistent if it isn't a bug

Lt. Templeton Peck

08/28/2019, 2:45 PM

https://github.com/LtTempletonPeck/multiple-params

corneil

08/28/2019, 9:12 PM

Does the 2nd return

["A,B", "C,D"]

Lt. Templeton Peck

08/28/2019, 10:49 PM

https://kotlinlang.slack.com/archives/C0B8ZTWE4/p1567003136004700

Lt. Templeton Peck

08/28/2019, 11:46 PM

["A","B","C","D"]

is what they both should return

Lt. Templeton Peck

08/29/2019, 5:37 AM

ParamQuery

was originally a Java class with default constructor with getter/setters. I converted it to a Kotlin data class with constructor params only and it broke the original behavior. Making the params properties of the data class restored the original behavior but that loses the niceness of a data class (equals/hash/copy). It should work the same so it seems like a bug?

corneil

08/30/2019, 7:14 AM

Yes