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#spring
  • s

    strelok

    08/01/2017, 2:26 PM
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    bean {
    Routes(ref(), ref())
  }
    I mean I understand what this does. But just looks a bit WTF to me. Normal 
    Java/Kotlin
    @Configuration would look better and be more explicit in this case.
    ➕ 1
  • s

    sdeleuze

    08/01/2017, 2:29 PM
    Yeah I was thinking about introducing autowire<Routes>()
  • s

    sdeleuze

    08/01/2017, 2:33 PM
    Not sure yet, but yes I agree the syntax is a little bit weird
  • s

    sdeleuze

    08/01/2017, 2:45 PM
    Originaly it was ref<Foo>()
  • s

    sdeleuze

    08/01/2017, 2:46 PM
    But since Kotlin type inference is clever, ref() is enough (but I can understand some find it disturbing)
  • s

    strelok

    08/01/2017, 2:52 PM
    I guess you can always be more explicit and write 
    ref<UserHandler>()
    . It just jumped at me 🤔 when I saw it like that.
  • s

    sdeleuze

    08/01/2017, 3:04 PM
    I can, and I did initialy, but it's not super idiomatic in Kotlin to write unecessarry code ...
  • f

    fitzoh

    08/01/2017, 3:53 PM
    @strelok yeah, the null bean is a little janky, but you could guard it with an 
    @ConditionalOnMissingBean
  • f

    fitzoh

    08/01/2017, 3:53 PM
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    @ConditionalOnMissingBean(String::class)
    @Bean
    fun fallbackStringBean() : String? = null
  • l

    lewis

    08/02/2017, 10:07 AM
    Hey, I updated one of my projects today, and it looks like something has been bumped and is causing a strange error;
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    Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [application.bla.Properties]: No corresponding Kotlin constructor found
	at org.springframework.beans.BeanUtils$KotlinDelegate.instantiateClass(BeanUtils.java:742) ~[spring-beans-5.0.0.RC3.jar!/:5.0.0.RC3]
    I'm using the kotlin-spring plugin in my Gradle script
  • l

    lewis

    08/02/2017, 10:36 AM
    Looks like it was broken my M3
  • s

    sdeleuze

    08/02/2017, 2:52 PM
  • s

    sdeleuze

    08/02/2017, 2:54 PM
    @lewis If he don't create the issue this week please create one in ordre to be sure I don't forget ;-)
  • z

    ziad

    08/02/2017, 10:12 PM
    Hello, In my @SpringBootApplication class, I've defined the following function:
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    @Bean
    fun init(dataSource: DataSource)
    Intellij complains with a:
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    "Could not autowire. There is more than one bean of 'DataSource' type"
dataSource (DataSourceConfiguration.class)
dataSource (DataSourceConfiguration.class)
    Can someone tell me what I'm doing wrong please? Or explain to me why intellij is complaining? I'm somewhat confused by the duplication. Also curiously this compiles and appears to be working correctly during runtime, intellij bug?
  • z

    ziad

    08/02/2017, 10:13 PM
    If this is not a SpringBoot question but an Intellij one please let me know and I'll remove it from here and post it to #intellij
  • t

    timp

    08/02/2017, 10:18 PM
  • t

    timp

    08/02/2017, 10:24 PM
    It’s just Intellij trying to be clever and figure out what might be available in the context at runtime, I’m not sure this can ever be 100% accurate as I the available beans at runtime depend on a whole bunch of stuff, eg. the current spring profile
  • z

    ziad

    08/02/2017, 10:29 PM
    Wow Tim, how did you spot that? Yeah, it's the same thing. I just came across it in my code base again and wondered if there has been any updates I'm unaware of that I can do to resolve it.
  • z

    ziad

    08/02/2017, 10:29 PM
    Thanks for the answer anyway 😃
  • s

    shainegordon

    08/03/2017, 10:28 PM
    I have just started a new spring project and I am struggling about bit to use template methods like JdbcTemplate.queryForObject which take a 
    Class<T> requiredType
    as a parameter
  • s

    shainegordon

    08/03/2017, 10:28 PM
    for example
  • s

    shainegordon

    08/03/2017, 10:28 PM
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    val id = 123.toLong()
val externalSystemId = jdbcTemplate.queryForObject("select external_system_id from foo where id = ? limit 1 ", Long.class, id)
  • s

    shainegordon

    08/03/2017, 10:29 PM
    obviously the 
    Long.class
    is not valid
  • s

    shainegordon

    08/03/2017, 10:32 PM
    if I use 
    Long.javaClass
    then the type of 
    externalSystemId
    is 
    Long.Companion!
  • s

    shainegordon

    08/03/2017, 10:34 PM
    how do I turn the value back into a Kotlin 
    Long
  • s

    shainegordon

    08/03/2017, 10:34 PM
    presumably this would actually have to be a 
    Long?
  • s

    strelok

    08/03/2017, 11:57 PM
    @shainegordon it should be 
    Long::class.java
    that's the standard way.
  • s

    strelok

    08/04/2017, 12:02 AM
    @shainegordon you can write an extension method if you like:
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    inline fun <reified T> JdbcTemplate.queryForObject(sql: String, varargs args: Any) = this.queryForObject(sql, T::class.java, args)
    and use it like this:
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    val result: Long = jdbcTemplate.queryForObject("select external_system_id from foo where id = ? limit 1 ", id)
// OR
val result = jdbcTemplate.queryForObject<Long>("select external_system_id from foo where id = ? limit 1 ", id)
  • s

    shainegordon

    08/04/2017, 8:33 AM
    @strelok oh wow, that is awesome
  • p

    pixelbumper

    08/06/2017, 12:56 PM
    Hi everybody 🙂 I am currently trying to model a jpa entity with an immutable non nullable field.
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    @Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
abstract class Credential(
        @ManyToOne
        @JoinColumn
        val account: Account
) {

    @Id
    val id = UUID.randomUUID()

    @Column(name = "DTYPE", insertable = false, updatable = false)
    val type: CredentialType
    Preferably i would like the type field to be a 
    val
    but unfortunately the field needs to be somewhat initialized. What are my options for such a case?
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