Merge branch 'master' of https://github.com/eugenp/tutorials into JAV…

…A-1672

core-java-modules/core-java-17/src/test/java/com/baeldung/hexformat/ByteHexadecimalConversionUnitTest.java

@@ -0,0 +1,23 @@
+package com.baeldung.hexformat;
+
+import java.util.HexFormat;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class ByteHexadecimalConversionUnitTest {
+
+    private HexFormat hexFormat = HexFormat.of();
+
+    @Test
+    void givenInitialisedHexFormat_whenHexStringIsPassed_thenByteArrayRepresentationIsReturned() {
+        byte[] hexBytes = hexFormat.parseHex("ABCDEF0123456789");
+        assertArrayEquals(new byte[] { -85, -51, -17, 1, 35, 69, 103, -119 }, hexBytes);
+    }
+
+    @Test
+    void givenInitialisedHexFormat_whenByteArrayIsPassed_thenHexStringRepresentationIsReturned() {
+        String bytesAsString = hexFormat.formatHex(new byte[] { -85, -51, -17, 1, 35, 69, 103, -119});
+        assertEquals("abcdef0123456789", bytesAsString);
+    }
+}

core-java-modules/core-java-17/src/test/java/com/baeldung/hexformat/PrimitiveTypeHexadecimalConversionUnitTest.java

@@ -0,0 +1,22 @@
+package com.baeldung.hexformat;
+
+import java.util.HexFormat;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class PrimitiveTypeHexadecimalConversionUnitTest {
+
+    private HexFormat hexFormat = HexFormat.of();
+
+    @Test
+    void givenInitialisedHexFormat_whenPrimitiveByteIsPassed_thenHexStringRepresentationIsReturned() {
+        String fromByte = hexFormat.toHexDigits((byte)64);
+        assertEquals("40", fromByte);
+    }
+
+    @Test
+    void givenInitialisedHexFormat_whenPrimitiveLongIsPassed_thenHexStringRepresentationIsReturned() {
+        String fromLong = hexFormat.toHexDigits(1234_5678_9012_3456L);
+        assertEquals("000462d53c8abac0", fromLong);
+    }
+}

core-java-modules/core-java-17/src/test/java/com/baeldung/hexformat/StringFormattingUnitTest.java

@@ -0,0 +1,15 @@
+package com.baeldung.hexformat;
+
+import java.util.HexFormat;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class StringFormattingUnitTest {
+
+    private HexFormat hexFormat = HexFormat.of().withPrefix("[").withSuffix("]").withDelimiter(", ");
+
+    @Test
+    public void givenInitialisedHexFormatWithFormattedStringOptions_whenByteArrayIsPassed_thenHexStringRepresentationFormattedCorrectlyIsReturned() {
+        assertEquals("[48], [0c], [11]", hexFormat.formatHex(new byte[] {72, 12, 17}));
+    }
+}

core-java-modules/core-java-17/src/test/java/com/baeldung/hexformat/UppercaseLowercaseOutputUnitTest.java

@@ -0,0 +1,40 @@
+package com.baeldung.hexformat;
+
+import java.util.HexFormat;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class UppercaseLowercaseOutputUnitTest {
+
+    @Test
+    public void givenInitialisedHexFormat_whenByteArrayIsPassed_thenLowerCaseHexStringRepresentationIsReturned() {
+        HexFormat hexFormat = HexFormat.of();
+        String bytesAsString = hexFormat.formatHex(new byte[] { -85, -51, -17, 1, 35, 69, 103, -119});
+        assertTrue(isLowerCase(bytesAsString));
+    }
+
+    @Test
+    public void givenInitialisedHexFormatWithUpperCaseOption_whenByteArrayIsPassed_thenLowerCaseHexStringRepresentationIsReturned() {
+        HexFormat hexFormat = HexFormat.of().withUpperCase();
+        String bytesAsString = hexFormat.formatHex(new byte[] { -85, -51, -17, 1, 35, 69, 103, -119});
+        assertTrue(isUpperCase(bytesAsString));
+    }
+
+    private boolean isLowerCase(String str) {
+        char[] charArray = str.toCharArray();
+        for (int i=0; i < charArray.length; i++) {
+            if (Character.isUpperCase(charArray[i]))
+                return false;
+        }
+        return true;
+    }
+
+    private boolean isUpperCase(String str) {
+        char[] charArray = str.toCharArray();
+        for (int i=0; i < charArray.length; i++) {
+            if (Character.isLowerCase(charArray[i]))
+                return false;
+        }
+        return true;
+    }
+}

docker/docker-sample-app/Dockerfile

@@ -0,0 +1,3 @@
+FROM openjdk:11
+COPY target/docker-sample-app-0.0.1.jar app.jar
+ENTRYPOINT ["java","-jar","/app.jar"]

docker/docker-sample-app/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- How to Get Docker-Compose to Always Use the Latest Image

docker/docker-sample-app/docker-compose-build-image.yaml

@@ -0,0 +1,8 @@
+version: '2.4'
+services:
+  db:
+    image: postgres
+  my_app:
+    build: .
+    ports:
+      - "8080:8080"

docker/docker-sample-app/docker-compose-with-image.yaml

@@ -0,0 +1,9 @@
+version: '2.4'
+services:
+  db:
+    image: postgres
+  my_app:
+    image: "eugen/test-app:latest"
+    ports:
+      - "8080:8080"
+

docker/docker-sample-app/pom.xml

@@ -0,0 +1,45 @@
+<?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.docker</groupId>
+        <artifactId>docker</artifactId>
+        <version>0.0.1</version>
+    </parent>
+
+    <artifactId>docker-sample-app</artifactId>
+    <name>docker-sample-app</name>
+    <description>Demo project for Spring Boot and Docker</description>
+
+    <properties>
+        <java.version>11</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

docker/docker-sample-app/src/main/java/com/baeldung/docker/app/DockAppApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.docker.app;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class DockAppApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(DockAppApplication.class, args);
+    }
+
+}

docker/docker-sample-app/src/main/java/com/baeldung/docker/app/endpoint/MyController.java

@@ -0,0 +1,13 @@
+package com.baeldung.docker.app.endpoint;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class MyController {
+
+    @GetMapping
+    public String version() {
+        return "1.7";
+    }
+}

docker/docker-sample-app/src/main/resources/application.properties

@@ -0,0 +1 @@
+

docker/docker-sample-app/src/test/java/com/baeldung/docker/app/DockAppApplicationUnitTest.java

@@ -0,0 +1,13 @@
+package com.baeldung.docker.app;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class DockAppApplicationUnitTest {
+
+    @Test
+    void contextLoads() {
+    }
+
+}

docker/pom.xml

@@ -25,6 +25,7 @@
     <modules>
         <module>docker-internal-dto</module>
         <module>docker-spring-boot</module>
+        <module>docker-sample-app</module>
     </modules>
 
 </project>