[BAEL-8955] by sgrverma23:Implement Feature Flags in Java with unleash

spring-boot-modules/pom.xml

@@ -44,6 +44,7 @@
         <module>spring-boot-data</module>
         <module>spring-boot-environment</module>
         <module>spring-boot-exceptions</module>
+        <module>spring-boot-featureFlag-Unleash</module>
         <module>spring-boot-flowable</module>
         <module>spring-boot-graphql</module>
         <!--<module>spring-boot-groovy</module>--> <!-- failing after upgrading to jdk17-->

spring-boot-modules/spring-boot-featureFlag-Unleash/README.md

@@ -0,0 +1,2 @@
+
+### Relevant Articles:

spring-boot-modules/spring-boot-featureFlag-Unleash/pom.xml

@@ -0,0 +1,59 @@
+<?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>
+    <artifactId>spring-boot-featureFlag-Unleash</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>spring-boot-featureFlag-Unleash</name>
+    <description>Demo project for Spring Boot FeatureFlag with Unleash</description>
+
+    <parent>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
+        <artifactId>spring-boot-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.getunleash</groupId>
+            <artifactId>unleash-client-java</artifactId>
+            <version>LATEST</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <compilerArgs>--enable-preview</compilerArgs>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <java.version>21</java.version>
+        <springdoc.version>2.2.0</springdoc.version>
+        <start-class>com.baeldung.DemoApplication</start-class>
+    </properties>
+
+</project>

spring-boot-modules/spring-boot-featureFlag-Unleash/src/main/java/com/baeldung/DemoApplication.java

@@ -0,0 +1,37 @@
+package com.baeldung;
+
+import io.getunleash.DefaultUnleash;
+import io.getunleash.Unleash;
+import io.getunleash.util.UnleashConfig;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class DemoApplication {
+
+    public static void main(String[] args) throws InterruptedException {
+        String appName = "unleash-onboarding-java";
+        String appInstanceID ="unleash-onboarding-instance";
+        String appServerUrl = "http://localhost:4242/api/";
+        String appToken = "<AddYourAPITokenHere>";
+
+        SpringApplication.run(DemoApplication.class, args);
+        UnleashConfig config = UnleashConfig.builder()
+                .appName(appName)
+                .instanceId(appInstanceID)
+                .unleashAPI(appServerUrl)
+                .apiKey(appToken)
+                .build();
+
+        Unleash unleash = new DefaultUnleash(config);
+        while(true) {
+            if (unleash.isEnabled("testDemoFeatureFlag")) {
+                System.out.println("New feature is enabled!");
+            } else {
+                System.out.println("New feature is disabled!");
+            }
+            Thread.sleep(1000);
+        }
+    }
+
+}