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remove remaining kotlin code

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Loredana Crusoveanu 2020-11-25 11:52:43 +02:00
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3
machine-learning/README.md
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@ -1,3 +0,0 @@
### Relevant Articles:
- [Introduction to Supervised Learning in Kotlin](https://www.baeldung.com/kotlin-supervised-learning)

163
machine-learning/pom.xml
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@ -1,163 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<project
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>machine-learning</artifactId>
<version>1.0-SNAPSHOT</version>
<name>machine-learning</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jdk8</artifactId>
<version>${kotlin.version}</version>
</dependency>
<dependency>
<groupId>org.nd4j</groupId>
<artifactId>nd4j-native-platform</artifactId>
<version>${dl4j.version}</version>
</dependency>
<dependency>
<groupId>org.deeplearning4j</groupId>
<artifactId>deeplearning4j-core</artifactId>
<version>${dl4j.version}</version>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jdk8</artifactId>
<version>${kotlin.version}</version>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-test</artifactId>
<version>${kotlin.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jdk8</artifactId>
<version>${kotlin.version}</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>src/main/kotlin</sourceDirectory>
<testSourceDirectory>src/test</testSourceDirectory>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>${clean.plugin.version}</version>
</plugin>
<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>${resources.plugin.version}</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>${compiler.plugin.version}</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>${surefire.plugin.version}</version>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>${jar.plugin.version}</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>${install.plugin.version}</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>${deploy.plugin.version}</version>
</plugin>
<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>${site.plugin.version}</version>
</plugin>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>${report.plugin.version}</version>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<version>${kotlin.version}</version>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
<configuration>
<jvmTarget>1.8</jvmTarget>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>testCompile</id>
<phase>test-compile</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<kotlin.version>1.3.50</kotlin.version>
<dl4j.version>0.9.1</dl4j.version>
<clean.plugin.version>3.1.0</clean.plugin.version>
<resources.plugin.version>3.0.2</resources.plugin.version>
<jar.plugin.version>3.0.2</jar.plugin.version>
<compiler.plugin.version>3.8.0</compiler.plugin.version>
<surefire.plugin.version>2.22.1</surefire.plugin.version>
<install.plugin.version>2.5.2</install.plugin.version>
<deploy.plugin.version>2.8.2</deploy.plugin.version>
<site.plugin.version>3.7.1</site.plugin.version>
<report.plugin.version>3.0.0</report.plugin.version>
</properties>
</project>

117
machine-learning/src/main/kotlin/com/baeldung/cnn/ConvolutionalNeuralNetwork.kt
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@ -1,117 +0,0 @@
package com.baeldung.cnn
import org.datavec.api.records.reader.impl.collection.ListStringRecordReader
import org.datavec.api.split.ListStringSplit
import org.deeplearning4j.datasets.datavec.RecordReaderDataSetIterator
import org.deeplearning4j.eval.Evaluation
import org.deeplearning4j.nn.conf.NeuralNetConfiguration
import org.deeplearning4j.nn.conf.inputs.InputType
import org.deeplearning4j.nn.conf.layers.*
import org.deeplearning4j.nn.multilayer.MultiLayerNetwork
import org.deeplearning4j.nn.weights.WeightInit
import org.nd4j.linalg.activations.Activation
import org.nd4j.linalg.learning.config.Adam
import org.nd4j.linalg.lossfunctions.LossFunctions
object ConvolutionalNeuralNetwork {
@JvmStatic
fun main(args: Array<String>) {
val dataset = ZalandoMNISTDataSet().load()
dataset.shuffle()
val trainDatasetIterator = createDatasetIterator(dataset.subList(0, 50_000))
val testDatasetIterator = createDatasetIterator(dataset.subList(50_000, 60_000))
val cnn = buildCNN()
learning(cnn, trainDatasetIterator)
testing(cnn, testDatasetIterator)
}
private fun createDatasetIterator(dataset: MutableList<List<String>>): RecordReaderDataSetIterator {
val listStringRecordReader = ListStringRecordReader()
listStringRecordReader.initialize(ListStringSplit(dataset))
return RecordReaderDataSetIterator(listStringRecordReader, 128, 28 * 28, 10)
}
private fun buildCNN(): MultiLayerNetwork {
val multiLayerNetwork = MultiLayerNetwork(NeuralNetConfiguration.Builder()
.seed(123)
.l2(0.0005)
.updater(Adam())
.weightInit(WeightInit.XAVIER)
.list()
.layer(0, buildInitialConvolutionLayer())
.layer(1, buildBatchNormalizationLayer())
.layer(2, buildPoolingLayer())
.layer(3, buildConvolutionLayer())
.layer(4, buildBatchNormalizationLayer())
.layer(5, buildPoolingLayer())
.layer(6, buildDenseLayer())
.layer(7, buildBatchNormalizationLayer())
.layer(8, buildDenseLayer())
.layer(9, buildOutputLayer())
.setInputType(InputType.convolutionalFlat(28, 28, 1))
.backprop(true)
.build())
multiLayerNetwork.init()
return multiLayerNetwork
}
private fun buildOutputLayer(): OutputLayer? {
return OutputLayer.Builder(LossFunctions.LossFunction.NEGATIVELOGLIKELIHOOD)
.nOut(10)
.activation(Activation.SOFTMAX)
.build()
}
private fun buildDenseLayer(): DenseLayer? {
return DenseLayer.Builder().activation(Activation.RELU)
.nOut(500)
.dropOut(0.5)
.build()
}
private fun buildPoolingLayer(): SubsamplingLayer? {
return SubsamplingLayer.Builder(SubsamplingLayer.PoolingType.MAX)
.kernelSize(2, 2)
.stride(2, 2)
.build()
}
private fun buildBatchNormalizationLayer() = BatchNormalization.Builder().build()
private fun buildConvolutionLayer(): ConvolutionLayer? {
return ConvolutionLayer.Builder(5, 5)
.stride(1, 1) // nIn need not specified in later layers
.nOut(50)
.activation(Activation.IDENTITY)
.build()
}
private fun buildInitialConvolutionLayer(): ConvolutionLayer? {
return ConvolutionLayer.Builder(5, 5)
.nIn(1)
.stride(1, 1)
.nOut(20)
.activation(Activation.IDENTITY)
.build()
}
private fun learning(cnn: MultiLayerNetwork, trainSet: RecordReaderDataSetIterator) {
for (i in 0 until 10) {
cnn.fit(trainSet)
}
}
private fun testing(cnn: MultiLayerNetwork, testSet: RecordReaderDataSetIterator) {
val evaluation = Evaluation(10)
while (testSet.hasNext()) {
val next = testSet.next()
val output = cnn.output(next.features)
evaluation.eval(next.labels, output)
}
println(evaluation.stats())
println(evaluation.confusionToString())
}
}

45
machine-learning/src/main/kotlin/com/baeldung/cnn/ZalandoMNISTDataSet.kt
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@ -1,45 +0,0 @@
package com.baeldung.cnn
import java.io.File
import java.nio.ByteBuffer
import java.util.*
import java.util.stream.Collectors
import kotlin.streams.asStream
class ZalandoMNISTDataSet {
private val OFFSET_SIZE = 4 //in bytes
private val NUM_ITEMS_OFFSET = 4
private val ITEMS_SIZE = 4
private val ROWS = 28
private val COLUMNS = 28
private val IMAGE_OFFSET = 16
private val IMAGE_SIZE = ROWS * COLUMNS
fun load(): MutableList<List<String>> {
val labelsFile = File("machine-learning/src/main/resources/train-labels-idx1-ubyte")
val imagesFile = File("machine-learning/src/main/resources/train-images-idx3-ubyte")
val labelBytes = labelsFile.readBytes()
val imageBytes = imagesFile.readBytes()
val byteLabelCount = Arrays.copyOfRange(labelBytes, NUM_ITEMS_OFFSET, NUM_ITEMS_OFFSET + ITEMS_SIZE)
val numberOfLabels = ByteBuffer.wrap(byteLabelCount).int
val list = mutableListOf<List<String>>()
for (i in 0 until numberOfLabels) {
val label = labelBytes[OFFSET_SIZE + ITEMS_SIZE + i]
val startBoundary = i * IMAGE_SIZE + IMAGE_OFFSET
val endBoundary = i * IMAGE_SIZE + IMAGE_OFFSET + IMAGE_SIZE
val imageData = Arrays.copyOfRange(imageBytes, startBoundary, endBoundary)
val imageDataList = imageData.iterator()
.asSequence()
.asStream().map { b -> b.toString() }
.collect(Collectors.toList())
imageDataList.add(label.toString())
list.add(imageDataList)
}
return list
}
}

31
machine-learning/src/main/kotlin/com/baeldung/simplelinearregression/SimpleLinearRegression.kt
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@ -1,31 +0,0 @@
package com.baeldung.simplelinearregression
import kotlin.math.pow
class SimpleLinearRegression(private val xs: List<Int>, private val ys: List<Int>) {
var slope: Double = 0.0
var yIntercept: Double = 0.0
init {
val covariance = calculateCovariance(xs, ys)
val variance = calculateVariance(xs)
slope = calculateSlope(covariance, variance)
yIntercept = calculateYIntercept(ys, slope, xs)
}
fun predict(independentVariable: Double) = slope * independentVariable + yIntercept
fun calculateRSquared(): Double {
val sst = ys.sumByDouble { y -> (y - ys.average()).pow(2) }
val ssr = xs.zip(ys) { x, y -> (y - predict(x.toDouble())).pow(2) }.sum()
return (sst - ssr) / sst
}
private fun calculateYIntercept(ys: List<Int>, slope: Double, xs: List<Int>) = ys.average() - slope * xs.average()
private fun calculateSlope(covariance: Double, variance: Double) = covariance / variance
private fun calculateCovariance(xs: List<Int>, ys: List<Int>) = xs.zip(ys) { x, y -> (x - xs.average()) * (y - ys.average()) }.sum()
private fun calculateVariance(xs: List<Int>) = xs.sumByDouble { x -> (x - xs.average()).pow(2) }
}

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machine-learning/src/main/resources/train-labels-idx1-ubyte
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40
machine-learning/src/test/com/baeldung/simplelinearregression/SimpleLinearRegressionUnitTest.kt
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package com.baeldung.simplelinearregression
import org.junit.Assert.assertEquals
import org.junit.jupiter.api.Test
class SimpleLinearRegressionUnitTest {
@Test
fun givenAProperDataSetWhenFedToASimpleLinearRegressionModelThenItPredictsCorrectly() {
val xs = arrayListOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
val ys = arrayListOf(25, 35, 49, 60, 75, 90, 115, 130, 150, 200)
val model = SimpleLinearRegression(xs, ys)
val predictionOne = model.predict(2.5)
assertEquals(38.99, predictionOne, 0.01)
val predictionTwo = model.predict(7.5)
assertEquals(128.84, predictionTwo, 0.01)
}
@Test
fun givenAPredictableDataSetWhenCalculatingTheLossFunctionThenTheModelIsConsideredReliable() {
val xs = arrayListOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
val ys = arrayListOf(25, 35, 49, 60, 75, 90, 115, 130, 150, 200)
val model = SimpleLinearRegression(xs, ys)
assertEquals(0.95, model.calculateRSquared(), 0.01)
}
@Test
fun givenAnUnpredictableDataSetWhenCalculatingTheLossFunctionThenTheModelIsConsideredUnreliable() {
val xs = arrayListOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
val ys = arrayListOf(200, 0, 200, 0, 0, 0, -115, 1000, 0, 1)
val model = SimpleLinearRegression(xs, ys)
assertEquals(0.01, model.calculateRSquared(), 0.01)
}
}

2
pom.xml
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@ -498,7 +498,6 @@
<module>lombok-custom</module>
<module>lucene</module>
<module>machine-learning</module>
<module>mapstruct</module>
<module>maven-modules</module>
@ -996,7 +995,6 @@
<module>lombok-custom</module>
<module>lucene</module>
<module>machine-learning</module>
<module>mapstruct</module>
<module>maven-modules</module>

1
spring-5-data-reactive/README.md
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@ -6,7 +6,6 @@ This module contains articles about reactive Spring 5 Data
The "REST With Spring" Classes: http://bit.ly/restwithspring
### Relevant Articles
- [Reactive Flow with MongoDB, Kotlin, and Spring WebFlux](https://www.baeldung.com/kotlin-mongodb-spring-webflux)
- [Spring Data Reactive Repositories with MongoDB](https://www.baeldung.com/spring-data-mongodb-reactive)
- [Spring Data MongoDB Tailable Cursors](https://www.baeldung.com/spring-data-mongodb-tailable-cursors)
- [A Quick Look at R2DBC with Spring Data](https://www.baeldung.com/spring-data-r2dbc)

67
spring-5-data-reactive/pom.xml
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@ -31,18 +31,6 @@
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-kotlin</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jdk8</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-reflect</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
@ -52,12 +40,6 @@
<artifactId>reactor-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-test</artifactId>
<version>${kotlin.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.reactivex.rxjava2</groupId>
<artifactId>rxjava</artifactId>
@ -128,53 +110,6 @@
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<artifactId>kotlin-maven-plugin</artifactId>
<version>${kotlin-maven-plugin.version}</version>
<executions>
<execution>
<id>compile</id>
<goals>
<goal>compile</goal>
</goals>
<configuration>
<sourceDirs>
<sourceDir>${project.basedir}/src/main/kotlin</sourceDir>
<sourceDir>${project.basedir}/src/main/java</sourceDir>
</sourceDirs>
</configuration>
</execution>
<execution>
<id>test-compile</id>
<goals>
<goal>test-compile</goal>
</goals>
<configuration>
<sourceDirs>
<sourceDir>${project.basedir}/src/test/kotlin</sourceDir>
<sourceDir>${project.basedir}/src/test/java</sourceDir>
</sourceDirs>
</configuration>
</execution>
</executions>
<groupId>org.jetbrains.kotlin</groupId>
<configuration>
<args>
<arg>-Xjsr305=strict</arg>
</args>
<compilerPlugins>
<plugin>spring</plugin>
</compilerPlugins>
<jvmTarget>1.8</jvmTarget>
</configuration>
<dependencies>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-allopen</artifactId>
<version>${kotlin.version}</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
@ -215,8 +150,6 @@
</build>
<properties>
<kotlin.version>1.2.40</kotlin.version>
<kotlin-maven-plugin.version>1.2.40</kotlin-maven-plugin.version>
<spring-tx.version>5.2.2.RELEASE</spring-tx.version>
<spring-data-r2dbc.version>1.0.0.RELEASE</spring-data-r2dbc.version>
<r2dbc-h2.version>0.8.1.RELEASE</r2dbc-h2.version>

12
spring-5-data-reactive/src/main/kotlin/com/baeldung/Application.kt
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@ -1,12 +0,0 @@
package com.baeldung
import org.springframework.boot.SpringApplication
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.autoconfigure.data.mongo.MongoReactiveDataAutoConfiguration
@SpringBootApplication(exclude = arrayOf(MongoReactiveDataAutoConfiguration::class))
class Application
fun main(args: Array<String>) {
SpringApplication.run(Application::class.java, *args)
}

6
spring-5-data-reactive/src/main/kotlin/com/baeldung/Event.kt
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@ -1,6 +0,0 @@
package com.baeldung
import org.springframework.data.mongodb.core.mapping.Document
@Document
data class Event(val id: String, val name: String)

6
spring-5-data-reactive/src/main/kotlin/com/baeldung/EventRepository.kt
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@ -1,6 +0,0 @@
package com.baeldung
import org.springframework.data.mongodb.core.mapping.Document
import org.springframework.data.mongodb.repository.ReactiveMongoRepository
interface EventRepository : ReactiveMongoRepository<Event, String>

25
spring-5-data-reactive/src/main/kotlin/com/baeldung/MongoConfig.kt
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@ -1,25 +0,0 @@
package com.baeldung
import com.mongodb.reactivestreams.client.MongoClient
import com.mongodb.reactivestreams.client.MongoClients
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.data.mongodb.config.AbstractReactiveMongoConfiguration
import org.springframework.data.mongodb.core.ReactiveMongoTemplate
import org.springframework.data.mongodb.repository.config.EnableReactiveMongoRepositories
@Configuration
@EnableReactiveMongoRepositories(basePackageClasses = arrayOf(EventRepository::class))
class MongoConfig : AbstractReactiveMongoConfiguration() {
override fun reactiveMongoClient(): MongoClient = mongoClient()
@Bean
fun mongoClient(): MongoClient = MongoClients.create()
override fun getDatabaseName(): String = "mongoDatabase"
@Bean
override fun reactiveMongoTemplate(): ReactiveMongoTemplate = ReactiveMongoTemplate(mongoClient(), databaseName)
}

16
spring-5-data-reactive/src/main/kotlin/com/baeldung/SendEmitter.kt
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@ -1,16 +0,0 @@
package com.baeldung
import org.springframework.http.MediaType
import org.springframework.web.bind.annotation.GetMapping
import org.springframework.web.bind.annotation.RequestParam
import org.springframework.web.bind.annotation.RestController
import java.util.*
@RestController
class SendEmitter(val eventRepository: EventRepository) {
@GetMapping(value = "/save", produces = arrayOf(MediaType.TEXT_EVENT_STREAM_VALUE))
fun executeExample(@RequestParam("eventName") eventName: String) =
eventRepository.save(Event(UUID.randomUUID().toString(), eventName)).flux()
}

39
spring-5-data-reactive/src/main/resources/static/index.html
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@ -1,39 +0,0 @@
<html>
<body>
<!-- Save new event -->
<form method="get" action="/save">
<input type="text" name="eventName">
<button type="submit">Save new event</button>
</form>
<!-- Receive saved event -->
<div id="content"></div>
<script>
let source = new EventSource("save");
source.addEventListener('message', function (e) {
console.log('New message is received');
const index = JSON.parse(e.data);
const content = `New event added: ${index.name}<br>`;
document.getElementById("content").innerHTML += content;
}, false);
source.addEventListener('open', function(e) {
console.log('The connection has been opened');
}, false);
source.addEventListener('error', function(e) {
if (e.readyState == EventSource.CLOSED){
console.log('The connection has been closed');
}
}, false);
</script>
</body>
<html>

1
spring-5-mvc/README.md
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@ -3,7 +3,6 @@
This module contains articles about Spring 5 model-view-controller (MVC) pattern
### Relevant Articles:
- [Spring Boot and Kotlin](https://www.baeldung.com/spring-boot-kotlin)
- [Spring MVC Streaming and SSE Request Processing](https://www.baeldung.com/spring-mvc-sse-streams)
- [Interface Driven Controllers in Spring](https://www.baeldung.com/spring-interface-driven-controllers)
- [Returning Plain HTML From a Spring MVC Controller](https://www.baeldung.com/spring-mvc-return-html)

82
spring-5-mvc/pom.xml
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@ -42,22 +42,6 @@
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
</dependency>
<!--kotlin deps -->
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jre8</artifactId>
<version>${kotlin.version}</version>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-reflect</artifactId>
<version>${kotlin.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-kotlin</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- runtime and test scoped -->
<dependency>
<groupId>org.springframework.boot</groupId>
@ -103,77 +87,11 @@
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<artifactId>kotlin-maven-plugin</artifactId>
<groupId>org.jetbrains.kotlin</groupId>
<version>${kotlin.version}</version>
<configuration>
<compilerPlugins>
<plugin>spring</plugin>
</compilerPlugins>
<jvmTarget>${java.version}</jvmTarget>
</configuration>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-allopen</artifactId>
<version>${kotlin.version}</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>${basedir}/src/main/java</source>
<source>${basedir}/src/main/kotlin</source>
</sources>
</configuration>
</execution>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>add-test-source</goal>
</goals>
<configuration>
<sources>
<source>${basedir}/src/test/java</source>
<source>${basedir}/src/test/kotlin</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<properties>
<jayway-rest-assured.version>2.9.0</jayway-rest-assured.version>
<kotlin.version>1.2.71</kotlin.version> <!-- Same as spring-boot-dependencies:2.1.7.RELEASE -->
<httpclient.version>4.5.8</httpclient.version>
<start-class>com.baeldung.Spring5Application</start-class>
<javafaker.version>0.18</javafaker.version>

23
spring-5-mvc/src/main/kotlin/com/baeldung/springbootkotlin/HelloController.kt
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@ -1,23 +0,0 @@
package com.baeldung.springbootkotlin
import org.springframework.web.bind.annotation.GetMapping
import org.springframework.web.bind.annotation.RestController
@RestController
class HelloController(val helloService: HelloService) {
@GetMapping("/hello")
fun helloKotlin(): String {
return "hello world"
}
@GetMapping("/hello-service")
fun helloKotlinService(): String {
return helloService.getHello()
}
@GetMapping("/hello-dto")
fun helloDto(): HelloDto {
return HelloDto("Hello from the dto")
}
}

3
spring-5-mvc/src/main/kotlin/com/baeldung/springbootkotlin/HelloDto.kt
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@ -1,3 +0,0 @@
package com.baeldung.springbootkotlin
data class HelloDto(val greeting: String)

11
spring-5-mvc/src/main/kotlin/com/baeldung/springbootkotlin/HelloService.kt
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@ -1,11 +0,0 @@
package com.baeldung.springbootkotlin
import org.springframework.stereotype.Service
@Service
class HelloService {
fun getHello(): String {
return "hello service"
}
}

12
spring-5-mvc/src/main/kotlin/com/baeldung/springbootkotlin/KotlinDemoApplication.kt
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@ -1,12 +0,0 @@
package com.baeldung.springbootkotlin
import org.springframework.boot.SpringApplication
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration
@SpringBootApplication(scanBasePackages = arrayOf("com.baeldung.springbootkotlin"), exclude = arrayOf(SecurityAutoConfiguration::class))
class KotlinDemoApplication
fun main(args: Array<String>) {
SpringApplication.run(KotlinDemoApplication::class.java, *args)
}

52
spring-5-mvc/src/test/kotlin/com/baeldung/springbootkotlin/KotlinDemoApplicationIntegrationTest.kt
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@ -1,52 +0,0 @@
package com.baeldung.springbootkotlin
import org.junit.Assert.assertEquals
import org.junit.Assert.assertNotNull
import org.junit.Test
import org.junit.runner.RunWith
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.boot.test.context.SpringBootTest
import org.springframework.boot.test.web.client.TestRestTemplate
import org.springframework.http.HttpStatus
import org.springframework.test.context.junit4.SpringRunner
@RunWith(SpringRunner::class)
@SpringBootTest(
classes = arrayOf(KotlinDemoApplication::class),
webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
class KotlinDemoApplicationIntegrationTest {
@Autowired
lateinit var testRestTemplate: TestRestTemplate
@Test
fun whenCalled_thenShouldReturnHello() {
val result = testRestTemplate.withBasicAuth("user", "pass")
.getForEntity("/hello", String::class.java)
assertNotNull(result)
assertEquals(HttpStatus.OK, result?.statusCode)
assertEquals("hello world", result?.body)
}
@Test
fun whenCalled_thenShouldReturnHelloService() {
val result = testRestTemplate.withBasicAuth("user", "pass")
.getForEntity("/hello-service", String::class.java)
assertNotNull(result)
assertEquals(HttpStatus.OK, result?.statusCode)
assertEquals(result?.body, "hello service")
}
@Test
fun whenCalled_thenShouldReturnJson() {
val result = testRestTemplate.withBasicAuth("user", "pass")
.getForEntity("/hello-dto", HelloDto::class.java)
assertNotNull(result)
assertEquals(HttpStatus.OK, result?.statusCode)
assertEquals(result?.body, HelloDto("Hello from the dto"))
}
}

1
spring-security-modules/pom.xml
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@ -38,7 +38,6 @@
<module>spring-security-oauth2-sso</module>
<module>spring-security-web-thymeleaf</module>
<module>spring-security-web-x509</module>
<module>spring-security-kotlin-dsl</module>
</modules>
</project>

3
spring-security-modules/spring-security-kotlin-dsl/README.md
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@ -1,3 +0,0 @@
### Relevant Articles:
- [Spring Security with Kotlin DSL](https://www.baeldung.com/kotlin/spring-security-dsl)

87
spring-security-modules/spring-security-kotlin-dsl/pom.xml
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@ -1,87 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-boot-2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../parent-boot-2</relativePath>
</parent>
<groupId>com.baeldung.spring.security.dsl</groupId>
<artifactId>spring-security-kotlin-dsl</artifactId>
<version>1.0</version>
<name>spring-security-kotlin-dsl</name>
<description>Spring Security Kotlin DSL</description>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-kotlin</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-reflect</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jdk8</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
<testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<configuration>
<args>
<arg>-Xjsr305=strict</arg>
</args>
<compilerPlugins>
<plugin>spring</plugin>
</compilerPlugins>
</configuration>
<dependencies>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-allopen</artifactId>
<version>${kotlin.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
<properties>
<java.version>11</java.version>
<kotlin.version>1.3.72</kotlin.version>
</properties>
</project>

71
spring-security-modules/spring-security-kotlin-dsl/src/main/kotlin/com/baeldung/security/kotlin/dsl/SpringSecurityKotlinApplication.kt
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@ -1,71 +0,0 @@
package com.baeldung.security.kotlin.dsl
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.runApplication
import org.springframework.context.annotation.Configuration
import org.springframework.context.support.beans
import org.springframework.core.annotation.Order
import org.springframework.security.config.annotation.web.builders.HttpSecurity
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter
import org.springframework.security.config.web.servlet.invoke
import org.springframework.security.core.userdetails.User
import org.springframework.security.provisioning.InMemoryUserDetailsManager
import org.springframework.web.servlet.function.ServerResponse
import org.springframework.web.servlet.function.router
@EnableWebSecurity
@SpringBootApplication
class SpringSecurityKotlinApplication
@Order(1)
@Configuration
class AdminSecurityConfiguration : WebSecurityConfigurerAdapter() {
override fun configure(http: HttpSecurity?) {
http {
authorizeRequests {
authorize("/greetings/**", hasAuthority("ROLE_ADMIN"))
}
httpBasic {}
}
}
}
@Configuration
class BasicSecurityConfiguration : WebSecurityConfigurerAdapter() {
override fun configure(http: HttpSecurity?) {
http {
authorizeRequests {
authorize("/**", permitAll)
}
httpBasic {}
}
}
}
fun main(args: Array<String>) {
runApplication<SpringSecurityKotlinApplication>(*args) {
addInitializers( beans {
bean {
fun user(user: String, password: String, vararg roles: String) =
User
.withDefaultPasswordEncoder()
.username(user)
.password(password)
.roles(*roles)
.build()
InMemoryUserDetailsManager(user("user", "password", "USER")
, user("admin", "password", "USER", "ADMIN"))
}
bean {
router {
GET("/greetings") {
request -> request.principal().map { it.name }.map { ServerResponse.ok().body(mapOf("greeting" to "Hello $it")) }.orElseGet { ServerResponse.badRequest().build() }
}
}
}
})
}
}

0
spring-security-modules/spring-security-kotlin-dsl/src/main/resources/application.properties
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35
spring-security-modules/spring-security-kotlin-dsl/src/test/kotlin/com/spring/security/kotlin/dsl/SpringSecurityKotlinApplicationTests.kt
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@ -1,35 +0,0 @@
package com.spring.security.kotlin.dsl
import org.junit.jupiter.api.Test
import org.junit.runner.RunWith
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc
import org.springframework.boot.test.context.SpringBootTest
import org.springframework.security.test.context.support.WithMockUser
import org.springframework.test.context.junit4.SpringRunner
import org.springframework.test.web.servlet.MockMvc
import org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestBuilders.*
import org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.user
import org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.httpBasic
import org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.authenticated
import org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.unauthenticated
import org.springframework.test.web.servlet.get
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*
import org.springframework.test.web.servlet.result.MockMvcResultMatchers.status
@RunWith(SpringRunner::class)
@SpringBootTest
@AutoConfigureMockMvc
class SpringSecurityKotlinApplicationTests {
@Autowired
private lateinit var mockMvc: MockMvc
@Test
fun `ordinary user not permitted to access the endpoint`() {
this.mockMvc
.perform(get("/greetings")
.with(httpBasic("user", "password")))
.andExpect(unauthenticated())
}
}