Myujth

Is it possible to use ObjectBox in application with Ktor? I have the following build.gradle file:

buildscript 
 // Consider moving these values to `gradle.properties`
 ext.kotlin_version = '1.2.70'
 ext.ktor_version = '0.9.4'
 ext.appengine_version = '1.9.60'
 ext.appengine_plugin_version = '1.3.4'
 ext.objectbox_version = '2.1.0'

 repositories 
 jcenter()
 
 dependencies 
 classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 classpath "com.google.cloud.tools:appengine-gradle-plugin:$appengine_plugin_version"
 classpath "io.objectbox:objectbox-gradle-plugin:$objectbox_version"
 


apply plugin: 'kotlin'
apply plugin: 'war'
apply plugin: 'com.google.cloud.tools.appengine'
// to enable gradle in IntelliJ IDEA
apply plugin: 'idea'
apply plugin: 'java'
apply plugin: 'kotlin-kapt'
apply plugin: 'io.objectbox'

sourceSets 
 main.kotlin.srcDirs = [ 'src/main/kotlin' ]


repositories 
 jcenter()
 maven url "https://kotlin.bintray.com/ktor" 
 maven url "https://dl.bintray.com/kotlin/exposed" 


dependencies 
 compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
 compile "io.ktor:ktor-server-servlet:$ktor_version"
 compile "io.ktor:ktor-html-builder:$ktor_version"
 compile "io.ktor:ktor-gson:$ktor_version"
 compile "io.ktor:ktor-freemarker:$ktor_version"

 compile 'org.jetbrains.exposed:exposed:0.8.5'
 compile group: 'mysql', name: 'mysql-connector-java', version: '8.0.12'

 providedCompile "com.google.appengine:appengine:$appengine_version"


kotlin.experimental.coroutines = 'enable'

task run(dependsOn: appengineRun)

And at first the project was running successfully. At that moment I had the model class:

class User()

But when I've added two annotation - @Entity and @Id from io.objectbox.annotation package - to this class:

@Entity
class User(@Id val id: Long)

the error occured: java.lang.reflect.UndeclaredThrowableException. And despite the error, ObjectBox'd generated the code with MyObjectBox:

What the reason of this error? And I know that mostly ObjectBox is considered to be database for Mobile devices. So is it possible to use ObjectBox as database in application with Ktor at all?