Listener

Resolves: #

README.md

+# 📚 Bookworm Library
+
+Jednoduchá Java aplikace pro správu knihovny – REST API, frontend a event-driven architektura pomocí Spring Boot a JMS (ActiveMQ Artemis).
+
+---
+
+## 🚀 Funkce
+
+- ✅ Přidání knihy (REST + GUI)
+- ✅ Půjčení a vrácení knihy
+- ✅ Zobrazení seznamu knih (Thymeleaf)
+- ✅ Event-driven reakce na vytvoření knihy
+- ✅ In-memory databáze (H2)
+- ✅ Embedded JMS (ActiveMQ Artemis)
+- ✅ Swagger dokumentace
+
+---
+
+## 🔧 Technologie
+
+- Java 21
+- Spring Boot 3.2+
+- Spring Web, JPA, Thymeleaf, JMS
+- H2 database
+- Mockito, JUnit 5
+
+---
+
+## ▶️ Jak aplikaci spustit
+
+1. **Klonuj nebo rozbal projekt**
+2. Ujisti se, že máš Javu 21+
+3. V root složce spusť:
+
+```bash
+./mvnw spring-boot:run
\ No newline at end of file

pom.xml

@@ -64,16 +64,7 @@
 			<artifactId>h2</artifactId>
 			<scope>runtime</scope>
 		</dependency>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-activemq</artifactId>
-		</dependency>
 
-		<dependency>
-			<groupId>org.apache.activemq</groupId>
-			<artifactId>activemq-broker</artifactId>
-			<version>5.17.6</version> <!-- aktuální verze k dubnu 2025 -->
-		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>

src/main/java/com/example/library/BookEventListener.java

+package com.example.library;
+
+public interface BookEventListener {
+  void onBookCreated(Book book);
+}

src/main/java/com/example/library/BookEventRegistry.java

+package com.example.library;
+
+public interface BookEventRegistry {
+  void registerListener(BookEventListener listener);
+}

src/main/java/com/example/library/BookEventService.java

+package com.example.library;
+
+import jakarta.annotation.PostConstruct;
+import org.springframework.stereotype.Service;
+
+@Service
+public class BookEventService {
+
+  private final BookEventRegistry registry;
+
+  public BookEventService(BookEventRegistry registry) {
+    this.registry = registry;
+  }
+
+  @PostConstruct
+  public void register() {
+    registry.registerListener(book -> {
+      // např. logika ukládání do DB
+      System.out.println("Book created: " + book.getTitle());
+    });
+  }
+}

src/main/java/com/example/library/BookSender.java

-package com.example.library;
-
-import jakarta.jms.Queue;
-import org.springframework.jms.core.JmsTemplate;
-import org.springframework.stereotype.Service;
-
-@Service
-public class BookSender {
-
-  private final JmsTemplate jmsTemplate;
-  private final Queue bookQueue;
-
-  public BookSender(JmsTemplate jmsTemplate, Queue bookQueue) {
-    this.jmsTemplate = jmsTemplate;
-    this.bookQueue = bookQueue;
-  }
-
-  public void sendBook(Book book) {
-    jmsTemplate.convertAndSend(bookQueue, book);
-  }
-}
\ No newline at end of file

src/main/java/com/example/library/BookeEventRegistryImpl.java

+package com.example.library;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class BookeEventRegistryImpl implements BookEventRegistry {
+
+
+  @Override
+  public void registerListener(BookEventListener listener) {
+
+  }
+}

src/main/java/com/example/library/config/JmsConfig.java

-package com.example.library.config;
-
-import jakarta.jms.Queue;
-import org.apache.activemq.command.ActiveMQQueue;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-
-@Configuration
-public class JmsConfig {
-
-  @Bean
-  public Queue bookQueue() {
-    return new  ActiveMQQueue("bookQueue");
-  }
-}

src/main/resources/application.properties

@@ -5,4 +5,5 @@ spring.datasource.driver-class-name=org.h2.Driver
 spring.datasource.username=sa
 spring.datasource.password=
 spring.jpa.hibernate.ddl-auto=update
-spring.h2.console.enabled=true
\ No newline at end of file
+spring.h2.console.enabled=true
+