BAEL-3091: The Prototype Pattern in Java (changed code based on valid comments from a reader)

persistence-modules/spring-data-geode/src/main/java/com/baeldung/springdatageode/app/ClientCacheApp.java

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+package com.baeldung.springdatageode.app;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.data.gemfire.config.annotation.ClientCacheApplication;
+import org.springframework.data.gemfire.config.annotation.EnableClusterConfiguration;
+import org.springframework.data.gemfire.config.annotation.EnableContinuousQueries;
+import org.springframework.data.gemfire.config.annotation.EnableEntityDefinedRegions;
+import org.springframework.data.gemfire.config.annotation.EnableIndexing;
+import org.springframework.data.gemfire.repository.config.EnableGemfireRepositories;
+
+import com.baeldung.springdatageode.controller.AppController;
+import com.baeldung.springdatageode.domain.Author;
+import com.baeldung.springdatageode.repo.AuthorRepository;
+import com.baeldung.springdatageode.service.AuthorService;
+
+@SpringBootApplication
+@ClientCacheApplication(subscriptionEnabled = true)
+@EnableEntityDefinedRegions(basePackageClasses = Author.class)
+@EnableIndexing
+@EnableGemfireRepositories(basePackageClasses = AuthorRepository.class)
+@ComponentScan(basePackageClasses = {AppController.class, AuthorService.class})
+@EnableClusterConfiguration(useHttp = true, requireHttps=false)
+@EnableContinuousQueries
+public class ClientCacheApp {
+    
+    public static void main(String[] args) {
+        SpringApplication.run(ClientCacheApp.class, args);
+    }
+    
+}

persistence-modules/spring-data-geode/src/main/java/com/baeldung/springdatageode/controller/AppController.java

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+package com.baeldung.springdatageode.controller;
+
+import java.util.Optional;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.springdatageode.domain.Author;
+import com.baeldung.springdatageode.repo.AuthorRepository;
+
+@RestController
+@CrossOrigin
+public class AppController {
+
+    @Autowired
+    private AuthorRepository authorRepositoryImpl;
+
+    @PostMapping(path = "/author" )
+    public ResponseEntity<String> addAuthor(@RequestBody Author author) throws Exception {       
+        authorRepositoryImpl.save(author);
+        return new ResponseEntity<>("OK", HttpStatus.OK);
+    }
+    
+    @GetMapping(path = "/author" )
+    public ResponseEntity<Author> getAuthor(@RequestParam("id") String id) throws Exception {
+        Optional<Author> author = authorRepositoryImpl.findById(Long.parseLong(id));
+        return new ResponseEntity<>(author.isPresent() ? author.get() : null, HttpStatus.OK);
+    }
+
+}

persistence-modules/spring-data-geode/src/main/java/com/baeldung/springdatageode/domain/Author.java

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+package com.baeldung.springdatageode.domain;
+
+import org.springframework.data.annotation.Id;
+import org.springframework.data.gemfire.mapping.annotation.Indexed;
+import org.springframework.data.gemfire.mapping.annotation.Region;
+
+@Region(name = "Authors")
+public class Author {
+    
+    @Id
+    private Long id;
+
+    private String firstName;
+
+    private String lastName;
+
+    @Indexed
+    private int age;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    @Override
+    public String toString() {
+        return this.firstName + " " + this.lastName + ", " + this.age + " years old";
+    }
+
+}
+

persistence-modules/spring-data-geode/src/main/java/com/baeldung/springdatageode/repo/AuthorRepository.java

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+package com.baeldung.springdatageode.repo;
+
+import com.baeldung.springdatageode.domain.Author;
+
+import java.util.Optional;
+
+import org.springframework.data.repository.CrudRepository;
+
+public interface AuthorRepository extends CrudRepository<Author, Long> {
+
+}

persistence-modules/spring-data-geode/src/main/java/com/baeldung/springdatageode/service/AuthorService.java

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+package com.baeldung.springdatageode.service;
+
+import org.apache.geode.cache.query.CqEvent;
+import org.springframework.data.gemfire.listener.annotation.ContinuousQuery;
+import org.springframework.stereotype.Service;
+
+@Service
+public class AuthorService {
+    
+    @ContinuousQuery(query = "SELECT * FROM /Authors a WHERE a.id = 1")
+    public void process(CqEvent event) {
+        System.out.println("Author #" + event.getKey() + " updated to " + event.getNewValue());
+    }
+}

persistence-modules/spring-data-geode/src/main/resources/application.properties

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+server.port=9091

persistence-modules/spring-data-geode/src/main/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>