Merge branch 'eugenp:master' into master

spring-boot-modules/pom.xml

@@ -85,7 +85,7 @@
         <module>spring-boot-redis</module>
         <module>spring-boot-cassandre</module>
         <module>spring-boot-react</module>
-        <module>spring-boot-3</module>
+        <!-- <module>spring-boot-3</module> --> <!-- JAVA-20931 -->
         <module>spring-boot-3-native</module>
         <module>spring-boot-3-observation</module>
         <module>spring-boot-3-test-pitfalls</module>

spring-boot-modules/spring-boot-3-native/pom.xml

@@ -56,10 +56,15 @@
                          <configuration>
                              <jvmArguments> -agentlib:native-image-agent=config-output-dir=target/native-image
                              </jvmArguments>
-                             <systemPropertyVariables>
-                                 <springAot>true</springAot>
-                             </systemPropertyVariables>
                          </configuration>
+						 <executions>
+							 <execution>
+								 <id>process-aot</id>
+								 <goals>
+									 <goal>process-aot</goal>
+								 </goals>
+							 </execution>
+						 </executions>
                      </plugin>  -->
                  </plugins>
              </pluginManagement>

spring-boot-modules/spring-boot-3/pom.xml

@@ -116,6 +116,7 @@
                     <groupId>org.springframework.boot</groupId>
                     <artifactId>spring-boot-maven-plugin</artifactId>
                     <configuration>
+                        <mainClass>com.baeldung.virtualthreads.VirtualThreadsApp</mainClass>
                         <excludes>
                             <exclude>
                                 <groupId>org.projectlombok</groupId>
@@ -131,15 +132,23 @@
                 <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>19</java.version>
         <mapstruct.version>1.5.2.Final</mapstruct.version>
         <springdoc.version>2.0.0</springdoc.version>
         <maven-surefire-plugin.version>3.0.0-M7</maven-surefire-plugin.version>
         <start-class>com.baeldung.sample.TodoApplication</start-class>
-		<mockserver.version>5.14.0</mockserver.version>
+        <mockserver.version>5.14.0</mockserver.version>
     </properties>
 
 </project>

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/virtualthreads/VirtualThreadsApp.java

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

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/virtualthreads/config/ThreadConfig.java

@@ -0,0 +1,33 @@
+package com.baeldung.virtualthreads.config;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.boot.web.embedded.tomcat.TomcatProtocolHandlerCustomizer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.task.AsyncTaskExecutor;
+import org.springframework.core.task.support.TaskExecutorAdapter;
+import org.springframework.scheduling.annotation.EnableAsync;
+
+import java.util.concurrent.Executors;
+
+@EnableAsync
+@Configuration
+@ConditionalOnProperty(
+        value = "spring.thread-executor",
+        havingValue = "virtual"
+)
+public class ThreadConfig {
+
+    @Bean
+    public AsyncTaskExecutor applicationTaskExecutor() {
+        return new TaskExecutorAdapter(Executors.newVirtualThreadPerTaskExecutor());
+    }
+
+    @Bean
+    public TomcatProtocolHandlerCustomizer<?> protocolHandlerVirtualThreadExecutorCustomizer() {
+        return protocolHandler -> {
+            protocolHandler.setExecutor(Executors.newVirtualThreadPerTaskExecutor());
+        };
+    }
+
+}

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/virtualthreads/controller/LoadTestController.java

@@ -0,0 +1,23 @@
+package com.baeldung.virtualthreads.controller;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.io.IOException;
+
+@RestController
+@RequestMapping("/load")
+public class LoadTestController {
+
+    private static final Logger LOG = LoggerFactory.getLogger(LoadTestController.class);
+
+    @GetMapping
+    public void doSomething() throws InterruptedException {
+        LOG.info("hey, I'm doing something");
+        Thread.sleep(1000);
+    }
+
+}

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/virtualthreads/controller/ThreadController.java

@@ -0,0 +1,16 @@
+package com.baeldung.virtualthreads.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/thread")
+public class ThreadController {
+
+    @GetMapping("/name")
+    public String getThreadName() {
+        return Thread.currentThread().toString();
+    }
+
+}

spring-boot-modules/spring-boot-3/src/main/resources/application.yml

@@ -14,8 +14,10 @@ spring:
     properties:
       hibernate:
         dialect: org.hibernate.dialect.H2Dialect
+  thread-executor: standard
+
 # Custom Properties
 cors:
   allow:
     origins: ${CORS_ALLOWED_ORIGINS:*}
-    credentials: ${CORS_ALLOW_CREDENTIALS:false}
+    credentials: ${CORS_ALLOW_CREDENTIALS:false}

spring-boot-modules/spring-boot-3/src/test/HTTP Load Request .jmx

@@ -0,0 +1,125 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<jmeterTestPlan version="1.2" properties="5.0" jmeter="5.5">
+  <hashTree>
+    <TestPlan guiclass="TestPlanGui" testclass="TestPlan" testname="Test Plan" enabled="true">
+      <stringProp name="TestPlan.comments"></stringProp>
+      <boolProp name="TestPlan.functional_mode">false</boolProp>
+      <boolProp name="TestPlan.tearDown_on_shutdown">true</boolProp>
+      <boolProp name="TestPlan.serialize_threadgroups">false</boolProp>
+      <elementProp name="TestPlan.user_defined_variables" elementType="Arguments" guiclass="ArgumentsPanel" testclass="Arguments" testname="User Defined Variables" enabled="true">
+        <collectionProp name="Arguments.arguments"/>
+      </elementProp>
+      <stringProp name="TestPlan.user_define_classpath"></stringProp>
+    </TestPlan>
+    <hashTree>
+      <ThreadGroup guiclass="ThreadGroupGui" testclass="ThreadGroup" testname="Thread Group" enabled="true">
+        <stringProp name="ThreadGroup.on_sample_error">stoptest</stringProp>
+        <elementProp name="ThreadGroup.main_controller" elementType="LoopController" guiclass="LoopControlPanel" testclass="LoopController" testname="Loop Controller" enabled="true">
+          <boolProp name="LoopController.continue_forever">false</boolProp>
+          <intProp name="LoopController.loops">-1</intProp>
+        </elementProp>
+        <stringProp name="ThreadGroup.num_threads">1000</stringProp>
+        <stringProp name="ThreadGroup.ramp_time">10</stringProp>
+        <boolProp name="ThreadGroup.scheduler">true</boolProp>
+        <stringProp name="ThreadGroup.duration">100</stringProp>
+        <stringProp name="ThreadGroup.delay"></stringProp>
+        <boolProp name="ThreadGroup.same_user_on_next_iteration">true</boolProp>
+      </ThreadGroup>
+      <hashTree>
+        <HTTPSamplerProxy guiclass="HttpTestSampleGui" testclass="HTTPSamplerProxy" testname="HTTP Load Request " enabled="true">
+          <elementProp name="HTTPsampler.Arguments" elementType="Arguments" guiclass="HTTPArgumentsPanel" testclass="Arguments" testname="User Defined Variables" enabled="true">
+            <collectionProp name="Arguments.arguments"/>
+          </elementProp>
+          <stringProp name="HTTPSampler.domain">localhost</stringProp>
+          <stringProp name="HTTPSampler.port">8080</stringProp>
+          <stringProp name="HTTPSampler.protocol"></stringProp>
+          <stringProp name="HTTPSampler.contentEncoding"></stringProp>
+          <stringProp name="HTTPSampler.path">/load</stringProp>
+          <stringProp name="HTTPSampler.method">GET</stringProp>
+          <boolProp name="HTTPSampler.follow_redirects">true</boolProp>
+          <boolProp name="HTTPSampler.auto_redirects">false</boolProp>
+          <boolProp name="HTTPSampler.use_keepalive">true</boolProp>
+          <boolProp name="HTTPSampler.DO_MULTIPART_POST">false</boolProp>
+          <stringProp name="HTTPSampler.embedded_url_re"></stringProp>
+          <stringProp name="HTTPSampler.connect_timeout"></stringProp>
+          <stringProp name="HTTPSampler.response_timeout"></stringProp>
+        </HTTPSamplerProxy>
+        <hashTree/>
+      </hashTree>
+      <ResultCollector guiclass="ViewResultsFullVisualizer" testclass="ResultCollector" testname="View Results Tree" enabled="true">
+        <boolProp name="ResultCollector.error_logging">false</boolProp>
+        <objProp>
+          <name>saveConfig</name>
+          <value class="SampleSaveConfiguration">
+            <time>true</time>
+            <latency>true</latency>
+            <timestamp>true</timestamp>
+            <success>true</success>
+            <label>true</label>
+            <code>true</code>
+            <message>true</message>
+            <threadName>true</threadName>
+            <dataType>true</dataType>
+            <encoding>false</encoding>
+            <assertions>true</assertions>
+            <subresults>true</subresults>
+            <responseData>false</responseData>
+            <samplerData>false</samplerData>
+            <xml>false</xml>
+            <fieldNames>true</fieldNames>
+            <responseHeaders>false</responseHeaders>
+            <requestHeaders>false</requestHeaders>
+            <responseDataOnError>false</responseDataOnError>
+            <saveAssertionResultsFailureMessage>true</saveAssertionResultsFailureMessage>
+            <assertionsResultsToSave>0</assertionsResultsToSave>
+            <bytes>true</bytes>
+            <sentBytes>true</sentBytes>
+            <url>true</url>
+            <threadCounts>true</threadCounts>
+            <idleTime>true</idleTime>
+            <connectTime>true</connectTime>
+          </value>
+        </objProp>
+        <stringProp name="filename"></stringProp>
+      </ResultCollector>
+      <hashTree/>
+      <ResultCollector guiclass="RespTimeGraphVisualizer" testclass="ResultCollector" testname="Response Time Graph" enabled="true">
+        <boolProp name="ResultCollector.error_logging">false</boolProp>
+        <objProp>
+          <name>saveConfig</name>
+          <value class="SampleSaveConfiguration">
+            <time>true</time>
+            <latency>true</latency>
+            <timestamp>true</timestamp>
+            <success>true</success>
+            <label>true</label>
+            <code>true</code>
+            <message>true</message>
+            <threadName>true</threadName>
+            <dataType>true</dataType>
+            <encoding>false</encoding>
+            <assertions>true</assertions>
+            <subresults>true</subresults>
+            <responseData>false</responseData>
+            <samplerData>false</samplerData>
+            <xml>false</xml>
+            <fieldNames>true</fieldNames>
+            <responseHeaders>false</responseHeaders>
+            <requestHeaders>false</requestHeaders>
+            <responseDataOnError>false</responseDataOnError>
+            <saveAssertionResultsFailureMessage>true</saveAssertionResultsFailureMessage>
+            <assertionsResultsToSave>0</assertionsResultsToSave>
+            <bytes>true</bytes>
+            <sentBytes>true</sentBytes>
+            <url>true</url>
+            <threadCounts>true</threadCounts>
+            <idleTime>true</idleTime>
+            <connectTime>true</connectTime>
+          </value>
+        </objProp>
+        <stringProp name="filename"></stringProp>
+      </ResultCollector>
+      <hashTree/>
+    </hashTree>
+  </hashTree>
+</jmeterTestPlan>

spring-boot-modules/spring-boot-cli/pom.xml

@@ -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>spring-boot-cli</artifactId>
+    <name>spring-boot-cli</name>
+    <packaging>jar</packaging>
+    <description></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>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-security</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.security</groupId>
+            <artifactId>spring-security-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>

spring-boot-modules/spring-boot-cli/src/main/java/com/baeldung/Application.java

@@ -0,0 +1,12 @@
+package com.baeldung;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

spring-boot-modules/spring-boot-cli/src/main/java/com/baeldung/controller/LoginController.java

@@ -0,0 +1,13 @@
+package com.baeldung.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class LoginController {
+
+    @GetMapping("/")
+    public String hello() {
+        return "Hello World!";
+    }
+}

spring-boot-modules/spring-boot-cli/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+spring.security.user.name=baeldung
+# Encoded password with SpringBoot CLI, the decoded password is baeldungPassword
+spring.security.user.password={bcrypt}$2y$10$R8VIwFiQ7aUST17YqMaWJuxjkCYqk3jjPlSxyDLLzqCTOwFuJNq2a

spring-boot-modules/spring-boot-cli/src/test/java/com/baeldung/encoding/PasswordEncodingUnitTest.java

@@ -0,0 +1,51 @@
+package com.baeldung.encoding;
+
+import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.httpBasic;
+import static org.springframework.security.test.web.servlet.setup.SecurityMockMvcConfigurers.springSecurity;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.Before;
+import org.junit.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.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@AutoConfigureMockMvc
+public class PasswordEncodingUnitTest {
+    private final static String userName = "baeldung";
+    private final static String passwordDecoded = "baeldungPassword";
+
+    private MockMvc mvc;
+
+    @Autowired
+    private WebApplicationContext webApplicationContext;
+
+    @Before
+    public void setup() {
+        mvc = MockMvcBuilders.webAppContextSetup(webApplicationContext)
+          .apply(springSecurity())
+          .build();
+    }
+
+    @Test
+    public void givenRequestWithWrongPassword_shouldFailWith401() throws Exception {
+        mvc.perform(get("/").with(httpBasic(userName, "wrongPassword")))
+          .andExpect(status().isUnauthorized());
+
+    }
+
+    @Test
+    public void givenRequestWithCorrectDecodedPassword_houldSucceedWith200() throws Exception {
+        mvc.perform(get("/").with(httpBasic(userName, passwordDecoded)))
+          .andExpect(status().isOk());
+
+    }
+}

spring-boot-modules/spring-boot-data-3/README.md

@@ -1,3 +1,4 @@
 ### Relevant Articles:
 - [Spring Data JPA – Run an App Without a Database](https://www.baeldung.com/spring-data-jpa-run-app-without-db)
 - [Integrate AWS Secrets Manager in Spring Boot](https://www.baeldung.com/spring-boot-integrate-aws-secrets-manager)
+- [Fix Spring Data JPA Exception: No Property Found for Type](https://www.baeldung.com/spring-data-jpa-exception-no-property-found-for-type)

spring-boot-modules/spring-boot-libraries-2/README.md

@@ -9,4 +9,5 @@ This module contains articles about various Spring Boot libraries
 - [An Introduction to Kong](https://www.baeldung.com/kong)
 - [Scanning Java Annotations At Runtime](https://www.baeldung.com/java-scan-annotations-runtime)
 - [Guide to Resilience4j With Spring Boot](https://www.baeldung.com/spring-boot-resilience4j)  
-More articles: [[prev -->]](/spring-boot-modules/spring-boot-libraries)
+- [Using OpenAI ChatGPT APIs in Spring Boot](https://www.baeldung.com/spring-boot-chatgpt-api-openai)
+- More articles: [[prev -->]](/spring-boot-modules/spring-boot-libraries)

spring-boot-modules/spring-boot-libraries-2/pom.xml

@@ -11,6 +11,18 @@
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.experimental</groupId>
+                <artifactId>spring-modulith-bom</artifactId>
+                <version>0.5.1</version>
+                <scope>import</scope>
+                <type>pom</type>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
     <dependencies>
         <dependency>
             <groupId>org.springframework.boot</groupId>
@@ -87,6 +99,15 @@
             <version>2.34.0</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.experimental</groupId>
+            <artifactId>spring-modulith-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.experimental</groupId>
+            <artifactId>spring-modulith-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/modulith/Application.java

@@ -0,0 +1,21 @@
+package com.baeldung.modulith;
+
+import com.baeldung.modulith.product.ProductService;
+import com.baeldung.modulith.product.internal.Product;
+import org.jobrunr.autoconfigure.JobRunrAutoConfiguration;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableAsync;
+
+@EnableAsync
+@SpringBootApplication
+@EnableAutoConfiguration(exclude = { JobRunrAutoConfiguration.class})
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args)
+          .getBean(ProductService.class)
+          .create(new Product("baeldung", "course", 10));
+    }
+}

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/modulith/notification/NotificationDTO.java

@@ -0,0 +1,39 @@
+package com.baeldung.modulith.notification;
+
+import java.util.Date;
+
+public class NotificationDTO {
+    private Date date;
+    private String format;
+    private String productName;
+
+    public NotificationDTO(Date date, String format, String productName) {
+        this.date = date;
+        this.format = format;
+        this.productName = productName;
+    }
+
+    public Date getDate() {
+        return date;
+    }
+
+    public void setDate(Date date) {
+        this.date = date;
+    }
+
+    public String getFormat() {
+        return format;
+    }
+
+    public void setFormat(String format) {
+        this.format = format;
+    }
+
+    public String getProductName() {
+        return productName;
+    }
+
+    public void setProductName(String productName) {
+        this.productName = productName;
+    }
+}

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/modulith/notification/NotificationService.java

@@ -0,0 +1,42 @@
+package com.baeldung.modulith.notification;
+
+import com.baeldung.modulith.notification.internal.Notification;
+import com.baeldung.modulith.notification.internal.NotificationType;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.modulith.ApplicationModuleListener;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Service;
+
+@Service
+public class NotificationService {
+
+    private static final Logger LOG = LoggerFactory.getLogger(NotificationService.class);
+
+    public void createNotification(NotificationDTO notificationDTO) {
+        Notification notification = toEntity(notificationDTO);
+        LOG.info("Received notification by module dependency for product {} in date {} by {}.", notification.getProductName()
+          , notification.getDate(), notification.getFormat());
+    }
+
+    @Async
+    @ApplicationModuleListener
+    public void notificationEvent(NotificationDTO event) {
+        Notification notification = toEntity(event);
+        LOG.info("Received notification by event for product {} in date {} by {}.", notification.getProductName()
+          , notification.getDate(), notification.getFormat());
+    }
+
+    private Notification toEntity(NotificationDTO notificationDTO) {
+        Notification notification = new Notification();
+        notification.setDate(notificationDTO.getDate());
+        if (notificationDTO.getFormat().equals("SMS")) {
+            notification.setFormat(NotificationType.SMS);
+        }
+        if (notificationDTO.getFormat().equals("EMAIL")) {
+            notification.setFormat(NotificationType.EMAIL);
+        }
+        notification.setProductName(notificationDTO.getProductName());
+        return notification;
+    }
+}

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/modulith/notification/internal/Notification.java

@@ -0,0 +1,37 @@
+package com.baeldung.modulith.notification.internal;
+
+import java.util.Date;
+
+public class Notification {
+    private Date date;
+    private NotificationType format;
+    private String productName;
+
+    public Notification() {
+
+    }
+
+    public Date getDate() {
+        return date;
+    }
+
+    public void setDate(Date date) {
+        this.date = date;
+    }
+
+    public NotificationType getFormat() {
+        return format;
+    }
+
+    public void setFormat(NotificationType format) {
+        this.format = format;
+    }
+
+    public String getProductName() {
+        return productName;
+    }
+
+    public void setProductName(String productName) {
+        this.productName = productName;
+    }
+}

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/modulith/notification/internal/NotificationType.java

@@ -0,0 +1,5 @@
+package com.baeldung.modulith.notification.internal;
+
+public enum NotificationType {
+    EMAIL, SMS
+}

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/modulith/product/ProductService.java

@@ -0,0 +1,26 @@
+package com.baeldung.modulith.product;
+
+import com.baeldung.modulith.notification.NotificationDTO;
+import com.baeldung.modulith.notification.NotificationService;
+import com.baeldung.modulith.product.internal.Product;
+import org.springframework.context.ApplicationEventPublisher;
+import org.springframework.stereotype.Service;
+
+import java.util.Date;
+
+@Service
+public class ProductService {
+
+    private final ApplicationEventPublisher events;
+    private final NotificationService notificationService;
+
+    public ProductService(ApplicationEventPublisher events, NotificationService notificationService) {
+        this.events = events;
+        this.notificationService = notificationService;
+    }
+
+    public void create(Product product) {
+        notificationService.createNotification(new NotificationDTO(new Date(), "SMS", product.getName()));
+        events.publishEvent(new NotificationDTO(new Date(), "SMS", product.getName()));
+    }
+}

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/modulith/product/internal/Product.java

@@ -0,0 +1,38 @@
+package com.baeldung.modulith.product.internal;
+
+public class Product {
+
+    private String name;
+    private String description;
+    private int price;
+
+    public Product(String name, String description, int price) {
+        this.name = name;
+        this.description = description;
+        this.price = price;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public int getPrice() {
+        return price;
+    }
+
+    public void setPrice(int price) {
+        this.price = price;
+    }
+}

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/openapi/config/OpenAIRestTemplateConfig.java

@@ -0,0 +1,25 @@
+package com.baeldung.openapi.config;
+
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class OpenAIRestTemplateConfig {
+
+    @Value("${openai.api.key}")
+    private String openaiApiKey;
+
+    @Bean
+    @Qualifier("openaiRestTemplate")
+    public RestTemplate openaiRestTemplate() {
+        RestTemplate restTemplate = new RestTemplate();
+        restTemplate.getInterceptors().add((request, body, execution) -> {
+            request.getHeaders().add("Authorization", "Bearer " + openaiApiKey);
+            return execution.execute(request, body);
+        });
+        return restTemplate;
+    }
+}

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/openapi/controller/ChatController.java

@@ -0,0 +1,48 @@
+package com.baeldung.openapi.controller;
+
+import com.baeldung.openapi.dto.ChatRequest;
+import com.baeldung.openapi.dto.ChatResponse;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.client.RestTemplate;
+
+@RestController
+public class ChatController {
+
+    @Qualifier("openaiRestTemplate")
+    @Autowired
+    private RestTemplate restTemplate;
+
+    @Value("${openai.model}")
+    private String model;
+
+    @Value("${openai.api.url}")
+    private String apiUrl;
+
+    /**
+     * Creates a chat request and sends it to the OpenAI API
+     * Returns the first message from the API response
+     *
+     * @param prompt the prompt to send to the API
+     * @return first message from the API response
+     */
+    @GetMapping("/chat")
+    public String chat(@RequestParam String prompt) {
+        ChatRequest request = new ChatRequest(model, prompt);
+
+        ChatResponse response = restTemplate.postForObject(
+                apiUrl,
+                request,
+                ChatResponse.class);
+
+        if (response == null || response.getChoices() == null || response.getChoices().isEmpty()) {
+            return "No response";
+        }
+
+        return response.getChoices().get(0).getMessage().getContent();
+    }
+}

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/openapi/dto/ChatRequest.java

@@ -0,0 +1,32 @@
+package com.baeldung.openapi.dto;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ChatRequest {
+    private String model;
+    private List<Message> messages;
+
+    public ChatRequest(String model, String prompt) {
+        this.model = model;
+
+        this.messages = new ArrayList<>();
+        this.messages.add(new Message("user", prompt));
+    }
+
+    public String getModel() {
+        return model;
+    }
+
+    public void setModel(String model) {
+        this.model = model;
+    }
+
+    public List<Message> getMessages() {
+        return messages;
+    }
+
+    public void setMessages(List<Message> messages) {
+        this.messages = messages;
+    }
+}

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/openapi/dto/ChatResponse.java

@@ -0,0 +1,38 @@
+package com.baeldung.openapi.dto;
+
+import java.util.List;
+
+public class ChatResponse {
+
+    private List<Choice> choices;
+
+    public static class Choice {
+
+        private int index;
+        private Message message;
+
+        public int getIndex() {
+            return index;
+        }
+
+        public void setIndex(int index) {
+            this.index = index;
+        }
+
+        public Message getMessage() {
+            return message;
+        }
+
+        public void setMessage(Message message) {
+            this.message = message;
+        }
+    }
+
+    public List<Choice> getChoices() {
+        return choices;
+    }
+
+    public void setChoices(List<Choice> choices) {
+        this.choices = choices;
+    }
+}

spring-boot-modules/spring-boot-libraries-2/src/main/java/com/baeldung/openapi/dto/Message.java

@@ -0,0 +1,31 @@
+package com.baeldung.openapi.dto;
+
+public class Message {
+
+    private String role;
+    private String content;
+
+    Message(String role, String content) {
+        this.role = role;
+        this.content = content;
+    }
+
+    Message() {
+    }
+
+    public String getRole() {
+        return role;
+    }
+
+    public void setRole(String role) {
+        this.role = role;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+}

spring-boot-modules/spring-boot-libraries-2/src/main/resources/application.properties

@@ -47,4 +47,8 @@ resilience4j.ratelimiter.instances.rateLimiterApi.limit-refresh-period=60s
 resilience4j.ratelimiter.instances.rateLimiterApi.timeout-duration=0s
 resilience4j.ratelimiter.instances.rateLimiterApi.allow-health-indicator-to-fail=true
 resilience4j.ratelimiter.instances.rateLimiterApi.subscribe-for-events=true
-resilience4j.ratelimiter.instances.rateLimiterApi.event-consumer-buffer-size=50
+resilience4j.ratelimiter.instances.rateLimiterApi.event-consumer-buffer-size=50
+
+openai.model=gpt-3.5-turbo
+openai.api.url=https://api.openai.com/v1/chat/completions
+openai.api.key=your-api-key