Merge remote-tracking branch 'eugenp/master'

This commit is contained in:
DOHA
2018-10-01 00:54:06 +03:00
326 changed files with 5939 additions and 1638 deletions
+4
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@@ -24,3 +24,7 @@
- [Practical Java Examples of the Big O Notation](http://www.baeldung.com/java-algorithm-complexity)
- [Find the Middle Element of a Linked List](http://www.baeldung.com/java-linked-list-middle-element)
- [An Introduction to the Theory of Big-O Notation](http://www.baeldung.com/big-o-notation)
- [Check If Two Rectangles Overlap In Java](https://www.baeldung.com/java-check-if-two-rectangles-overlap)
- [Calculate the Distance Between Two Points in Java](https://www.baeldung.com/java-distance-between-two-points)
- [Find the Intersection of Two Lines in Java](https://www.baeldung.com/java-intersection-of-two-lines)
- [Check If a String Contains All The Letters of The Alphabet](https://www.baeldung.com/java-string-contains-all-letters)
@@ -0,0 +1,50 @@
package com.baeldung.algorithms.mergesort;
public class MergeSort {
public static void main(String[] args) {
int[] a = { 5, 1, 6, 2, 3, 4 };
mergeSort(a, a.length);
for (int i = 0; i < a.length; i++)
System.out.println(a[i]);
}
public static void mergeSort(int[] a, int n) {
if (n < 2)
return;
int mid = n / 2;
int[] l = new int[mid];
int[] r = new int[n - mid];
for (int i = 0; i < mid; i++) {
l[i] = a[i];
}
for (int i = mid; i < n; i++) {
r[i - mid] = a[i];
}
mergeSort(l, mid);
mergeSort(r, n - mid);
merge(a, l, r, mid, n - mid);
}
public static void merge(int[] a, int[] l, int[] r, int left, int right) {
int i = 0, j = 0, k = 0;
while (i < left && j < right) {
if (l[i] < r[j])
a[k++] = l[i++];
else
a[k++] = r[j++];
}
while (i < left)
a[k++] = l[i++];
while (j < right)
a[k++] = r[j++];
}
}
@@ -0,0 +1,17 @@
package com.baeldung.algorithms.mergesort;
import org.junit.Assert;
import org.junit.Test;
public class MergeSortUnitTest {
@Test
public void positiveTest() {
int[] actual = { 5, 1, 6, 2, 3, 4 };
int[] expected = { 1, 2, 3, 4, 5, 6 };
MergeSort.mergeSort(actual, actual.length);
Assert.assertArrayEquals(expected, actual);
}
}
@@ -7,7 +7,7 @@ import junit.framework.TestSuite;
/**
* Unit test for simple App.
*/
public class AppTest
public class AppUnitTest
extends TestCase
{
/**
@@ -15,7 +15,7 @@ public class AppTest
*
* @param testName name of the test case
*/
public AppTest( String testName )
public AppUnitTest( String testName )
{
super( testName );
}
@@ -25,7 +25,7 @@ public class AppTest
*/
public static Test suite()
{
return new TestSuite( AppTest.class );
return new TestSuite( AppUnitTest.class );
}
/**
+1 -1
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@@ -6,7 +6,7 @@
<groupId>com.baeldung</groupId>
<artifactId>apache-avro</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Apache Avro</version>
<name>Apache Avro</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -13,7 +13,7 @@ import java.util.Objects;
import static org.junit.Assert.*;
public class AvroSerealizerDeSerealizerTest {
public class AvroSerealizerDeSerealizerUnitTest {
AvroSerealizer serealizer;
AvroDeSerealizer deSerealizer;
-1
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@@ -1,5 +1,4 @@
### Relevant articles
- [Introduction to Asciidoctor](http://www.baeldung.com/introduction-to-asciidoctor)
- [Generating a Book with Asciidoctor](http://www.baeldung.com/asciidoctor-book)
- [Introduction to Asciidoctor in Java](http://www.baeldung.com/asciidoctor)
+4 -3
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@@ -61,9 +61,10 @@
</build>
<properties>
<asciidoctor-maven-plugin.version>1.5.5</asciidoctor-maven-plugin.version>
<asciidoctorj.version>1.5.4</asciidoctorj.version>
<asciidoctorj-pdf.src.version>1.5.0-alpha.11</asciidoctorj-pdf.src.version>
<asciidoctor-maven-plugin.version>1.5.6</asciidoctor-maven-plugin.version>
<asciidoctorj.version>1.5.6</asciidoctorj.version>
<asciidoctorj-pdf.version>1.5.0-alpha.15</asciidoctorj-pdf.version>
<asciidoctorj-pdf.plugin.version>1.5.0-alpha.15</asciidoctorj-pdf.plugin.version>
</properties>
@@ -3,7 +3,7 @@ package com.baeldung.asciidoctor;
import org.junit.Assert;
import org.junit.Test;
public class AsciidoctorDemoTest {
public class AsciidoctorDemoIntegrationTest {
@Test
public void givenString_whenConverting_thenResultingHTMLCode() {
+38
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@@ -0,0 +1,38 @@
<?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>flyway-cdi</artifactId>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>cdi-portable-extension</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0.SP1</version>
</dependency>
<dependency>
<groupId>org.flywaydb</groupId>
<artifactId>flyway-core</artifactId>
<version>5.1.4</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jdbc</artifactId>
<version>8.5.33</version>
</dependency>
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>javax.annotation-api</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
</project>
@@ -0,0 +1,74 @@
package com.baeldung.cdi.extension;
import org.apache.tomcat.jdbc.pool.DataSource;
import org.flywaydb.core.Flyway;
import javax.annotation.sql.DataSourceDefinition;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.Any;
import javax.enterprise.inject.Default;
import javax.enterprise.inject.literal.InjectLiteral;
import javax.enterprise.inject.spi.*;
import javax.enterprise.util.AnnotationLiteral;
/**
* Flyway is now under CDI container like:
*
* @ApplicationScoped
* @FlywayType public class Flyway{
* @Inject setDataSource(DataSource dataSource){
* //...
* }
* }
*/
public class FlywayExtension implements Extension {
DataSourceDefinition dataSourceDefinition = null;
public void registerFlywayType(@Observes BeforeBeanDiscovery bbdEvent) {
bbdEvent.addAnnotatedType(Flyway.class, Flyway.class.getName());
}
public void detectDataSourceDefinition(@Observes @WithAnnotations(DataSourceDefinition.class) ProcessAnnotatedType<?> patEvent) {
AnnotatedType at = patEvent.getAnnotatedType();
dataSourceDefinition = at.getAnnotation(DataSourceDefinition.class);
}
public void processAnnotatedType(@Observes ProcessAnnotatedType<Flyway> patEvent) {
patEvent.configureAnnotatedType()
//Add Scope
.add(ApplicationScoped.Literal.INSTANCE)
//Add Qualifier
.add(new AnnotationLiteral<FlywayType>() {
})
//Decorate setDataSource(DataSource dataSource){} with @Inject
.filterMethods(annotatedMethod -> {
return annotatedMethod.getParameters().size() == 1 &&
annotatedMethod.getParameters().get(0).getBaseType().equals(javax.sql.DataSource.class);
})
.findFirst().get().add(InjectLiteral.INSTANCE);
}
void afterBeanDiscovery(@Observes AfterBeanDiscovery abdEvent, BeanManager bm) {
abdEvent.addBean()
.types(javax.sql.DataSource.class, DataSource.class)
.qualifiers(new AnnotationLiteral<Default>() {}, new AnnotationLiteral<Any>() {})
.scope(ApplicationScoped.class)
.name(DataSource.class.getName())
.beanClass(DataSource.class)
.createWith(creationalContext -> {
DataSource instance = new DataSource();
instance.setUrl(dataSourceDefinition.url());
instance.setDriverClassName(dataSourceDefinition.className());
return instance;
});
}
void runFlywayMigration(@Observes AfterDeploymentValidation adv, BeanManager manager) {
Flyway flyway = manager.createInstance().select(Flyway.class, new AnnotationLiteral<FlywayType>() {}).get();
flyway.migrate();
}
}
@@ -0,0 +1,14 @@
package com.baeldung.cdi.extension;
import javax.inject.Qualifier;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.*;
@Retention(RetentionPolicy.RUNTIME)
@Target({FIELD, METHOD, PARAMETER, TYPE})
@Qualifier
public @interface FlywayType {
}
@@ -0,0 +1,6 @@
<beans version="2.0" xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/beans_2_0.xsd"
bean-discovery-mode="annotated">
</beans>
@@ -0,0 +1,2 @@
com.baeldung.cdi.extension.FlywayExtension
+52
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@@ -0,0 +1,52 @@
<?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>main-app</artifactId>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>cdi-portable-extension</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0.SP1</version>
</dependency>
<dependency>
<groupId>org.jboss.weld.se</groupId>
<artifactId>weld-se-core</artifactId>
<version>3.0.5.Final</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.baeldung</groupId>
<artifactId>flyway-cdi</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.197</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>javax.annotation-api</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
</project>
@@ -0,0 +1,16 @@
package com.baeldung.cdi.extension;
import javax.annotation.sql.DataSourceDefinition;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.se.SeContainer;
import javax.enterprise.inject.se.SeContainerInitializer;
@ApplicationScoped
@DataSourceDefinition(name = "ds", className = "org.h2.Driver", url = "jdbc:h2:mem:testdb")
public class MainApp {
public static void main(String[] args) {
SeContainerInitializer initializer = SeContainerInitializer.newInstance();
try (SeContainer container = initializer.initialize()) {
}
}
}
@@ -0,0 +1,6 @@
<beans version="2.0" xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/beans_2_0.xsd"
bean-discovery-mode="annotated">
</beans>
@@ -0,0 +1,4 @@
create table PERSON (
ID int not null,
NAME varchar(100) not null
);
@@ -0,0 +1,3 @@
insert into PERSON (ID, NAME) values (1, 'Axel');
insert into PERSON (ID, NAME) values (2, 'Mr. Foo');
insert into PERSON (ID, NAME) values (3, 'Ms. Bar');
+30
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@@ -0,0 +1,30 @@
<?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>
<groupId>com.baeldung</groupId>
<artifactId>cdi-portable-extension</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<modules>
<module>main-app</module>
<module>flyway-cdi</module>
</modules>
<dependencies>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0.SP1</version>
</dependency>
</dependencies>
</project>
+3 -1
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@@ -48,4 +48,6 @@
- [Thread Safe LIFO Data Structure Implementations](https://www.baeldung.com/java-lifo-thread-safe)
- [Collections.emptyList() vs. New List Instance](https://www.baeldung.com/java-collections-emptylist-new-list)
- [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap)
- [](https://www.baeldung.com/java-hashset-arraylist-contains-performance)
- [Performance of contains() in a HashSet vs ArrayList](https://www.baeldung.com/java-hashset-arraylist-contains-performance)
- [Get the Key for a Value from a Java Map](https://www.baeldung.com/java-map-key-from-value)
- [Time Complexity of Java Collections](https://www.baeldung.com/java-collections-complexity)
@@ -0,0 +1,96 @@
package com.baeldung.map.util;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
public class MapMax {
public <K, V extends Comparable<V>> V maxUsingIteration(Map<K, V> map) {
Map.Entry<K, V> maxEntry = null;
for (Map.Entry<K, V> entry : map.entrySet()) {
if (maxEntry == null || entry.getValue()
.compareTo(maxEntry.getValue()) > 0) {
maxEntry = entry;
}
}
return maxEntry.getValue();
}
public <K, V extends Comparable<V>> V maxUsingCollectionsMax(Map<K, V> map) {
Entry<K, V> maxEntry = Collections.max(map.entrySet(), new Comparator<Entry<K, V>>() {
public int compare(Entry<K, V> e1, Entry<K, V> e2) {
return e1.getValue()
.compareTo(e2.getValue());
}
});
return maxEntry.getValue();
}
public <K, V extends Comparable<V>> V maxUsingCollectionsMaxAndLambda(Map<K, V> map) {
Entry<K, V> maxEntry = Collections.max(map.entrySet(), (Entry<K, V> e1, Entry<K, V> e2) -> e1.getValue()
.compareTo(e2.getValue()));
return maxEntry.getValue();
}
public <K, V extends Comparable<V>> V maxUsingCollectionsMaxAndMethodReference(Map<K, V> map) {
Entry<K, V> maxEntry = Collections.max(map.entrySet(), Comparator.comparing(Map.Entry::getValue));
return maxEntry.getValue();
}
public <K, V extends Comparable<V>> V maxUsingStreamAndLambda(Map<K, V> map) {
Optional<Entry<K, V>> maxEntry = map.entrySet()
.stream()
.max((Entry<K, V> e1, Entry<K, V> e2) -> e1.getValue()
.compareTo(e2.getValue()));
return maxEntry.get()
.getValue();
}
public <K, V extends Comparable<V>> V maxUsingStreamAndMethodReference(Map<K, V> map) {
Optional<Entry<K, V>> maxEntry = map.entrySet()
.stream()
.max(Comparator.comparing(Map.Entry::getValue));
return maxEntry.get()
.getValue();
}
public static void main(String[] args) {
Map<Integer, Integer> map = new HashMap<Integer, Integer>();
map.put(1, 3);
map.put(2, 4);
map.put(3, 5);
map.put(4, 6);
map.put(5, 7);
MapMax mapMax = new MapMax();
System.out.println(mapMax.maxUsingIteration(map));
System.out.println(mapMax.maxUsingCollectionsMax(map));
System.out.println(mapMax.maxUsingCollectionsMaxAndLambda(map));
System.out.println(mapMax.maxUsingCollectionsMaxAndMethodReference(map));
System.out.println(mapMax.maxUsingStreamAndLambda(map));
System.out.println(mapMax.maxUsingStreamAndMethodReference(map));
}
}
@@ -0,0 +1,59 @@
package com.baeldung.map.util;
import static org.junit.Assert.assertEquals;
import java.util.HashMap;
import java.util.Map;
import org.junit.Before;
import org.junit.Test;
public class MapMaxUnitTest {
Map<Integer, Integer> map = null;
MapMax mapMax = null;
@Before
public void setupTestData() {
map = new HashMap<Integer, Integer>();
map.put(23, 12);
map.put(46, 24);
map.put(27, 38);
mapMax = new MapMax();
}
@Test
public void givenMap_whenIterated_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingIteration(map));
}
@Test
public void givenMap_whenUsingCollectionsMax_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingCollectionsMax(map));
}
@Test
public void givenMap_whenUsingCollectionsMaxAndLambda_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingCollectionsMaxAndLambda(map));
}
@Test
public void givenMap_whenUsingCollectionsMaxAndMethodReference_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingCollectionsMaxAndMethodReference(map));
}
@Test
public void givenMap_whenUsingStreamAndLambda_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingStreamAndLambda(map));
}
@Test
public void givenMap_whenUsingStreamAndMethodReference_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingStreamAndMethodReference (map));
}
}
+1
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@@ -31,3 +31,4 @@
- [Create a Symbolic Link with Java](http://www.baeldung.com/java-symlink)
- [Quick Use of FilenameFilter](http://www.baeldung.com/java-filename-filter)
- [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap)
- [ Read a File into an ArrayList](https://www.baeldung.com/java-file-to-arraylist)
@@ -18,6 +18,7 @@ import java.net.URLConnection;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static org.junit.Assert.assertEquals;
@@ -50,7 +51,7 @@ public class FileOperationsManualTest {
@Test
public void givenFileName_whenUsingJarFile_thenFileData() throws IOException {
String expectedData = "BSD License";
String expectedData = "MIT License";
Class clazz = Matchers.class;
InputStream inputStream = clazz.getResourceAsStream("/LICENSE.txt");
@@ -79,7 +80,7 @@ public class FileOperationsManualTest {
ClassLoader classLoader = getClass().getClassLoader();
File file = new File(classLoader.getResource("fileTest.txt").getFile());
String data = FileUtils.readFileToString(file);
String data = FileUtils.readFileToString(file, "UTF-8");
assertEquals(expectedData, data.trim());
}
@@ -102,12 +103,11 @@ public class FileOperationsManualTest {
Path path = Paths.get(getClass().getClassLoader().getResource("fileTest.txt").toURI());
StringBuilder data = new StringBuilder();
Stream<String> lines = Files.lines(path);
lines.forEach(line -> data.append(line).append("\n"));
String data = lines.collect(Collectors.joining("\n"));
lines.close();
assertEquals(expectedData, data.toString().trim());
assertEquals(expectedData, data.trim());
}
private String readFromInputStream(InputStream inputStream) throws IOException {
@@ -0,0 +1 @@
Hello World from fileTest.txt!!!
+1
View File
@@ -151,3 +151,4 @@
- [ClassCastException: Arrays$ArrayList cannot be cast to ArrayList](https://www.baeldung.com/java-classcastexception-arrays-arraylist)
- [Throw Exception in Optional in Java 8](https://www.baeldung.com/java-optional-throw-exception)
- [Add a Character to a String at a Given Position](https://www.baeldung.com/java-add-character-to-string)
- [Synthetic Constructs in Java](https://www.baeldung.com/java-synthetic)
@@ -0,0 +1,43 @@
package com.baeldung.ternaryoperator;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class TernaryOperatorUnitTest {
@Test
public void givenACondition_whenUsingTernaryOperator_thenItEvaluatesConditionAndReturnsAValue() {
int number = 10;
String msg = number > 10 ? "Number is greater than 10" : "Number is less than or equal to 10";
assertThat(msg).isEqualTo("Number is less than or equal to 10");
}
@Test
public void givenATrueCondition_whenUsingTernaryOperator_thenOnlyExpression1IsEvaluated() {
int exp1 = 0, exp2 = 0;
int result = 12 > 10 ? ++exp1 : ++exp2;
assertThat(exp1).isEqualTo(1);
assertThat(exp2).isEqualTo(0);
assertThat(result).isEqualTo(1);
}
@Test
public void givenAFalseCondition_whenUsingTernaryOperator_thenOnlyExpression2IsEvaluated() {
int exp1 = 0, exp2 = 0;
int result = 8 > 10 ? ++exp1 : ++exp2;
assertThat(exp1).isEqualTo(0);
assertThat(exp2).isEqualTo(1);
assertThat(result).isEqualTo(1);
}
@Test
public void givenANestedCondition_whenUsingTernaryOperator_thenCorrectValueIsReturned() {
int number = 6;
String msg = number > 10 ? "Number is greater than 10" : number > 5 ? "Number is greater than 5" : "Number is less than or equal to 5";
assertThat(msg).isEqualTo("Number is greater than 5");
}
}
+4 -1
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@@ -33,4 +33,7 @@
- [Idiomatic Logging in Kotlin](http://www.baeldung.com/kotlin-logging)
- [Kotlin Constructors](https://www.baeldung.com/kotlin-constructors)
- [Creational Design Patterns in Kotlin: Builder](https://www.baeldung.com/kotlin-builder-pattern)
- [Kotlin Nested and Inner Classes](https://www.baeldung.com/kotlin-inner-classes)
- [Kotlin Nested and Inner Classes](https://www.baeldung.com/kotlin-inner-classes)
- [Kotlin with Ktor](https://www.baeldung.com/kotlin-ktor)
- [Fuel HTTP Library with Kotlin](https://www.baeldung.com/kotlin-fuel)
- [Introduction to Kovenant Library for Kotlin](https://www.baeldung.com/kotlin-kovenant)
-1
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@@ -15,7 +15,6 @@
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>${javaee-api.version}</version>
<scope>provided</scope>
</dependency>
</dependencies>

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