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

spring-cloud/spring-cloud-ribbon-client/src/main/java/com/baeldung/spring/cloud/ribbon/client/RibbonConfiguration.java

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+package com.baeldung.spring.cloud.ribbon.client;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+
+import com.netflix.client.config.IClientConfig;
+import com.netflix.loadbalancer.IPing;
+import com.netflix.loadbalancer.IRule;
+import com.netflix.loadbalancer.PingUrl;
+import com.netflix.loadbalancer.WeightedResponseTimeRule;
+import com.netflix.loadbalancer.AvailabilityFilteringRule;
+
+public class RibbonConfiguration {
+
+    @Autowired
+    IClientConfig ribbonClientConfig;
+
+    @Bean
+    public IPing ribbonPing(IClientConfig config) {
+        return new PingUrl();
+    }
+
+    @Bean
+    public IRule ribbonRule(IClientConfig config) {
+        return new WeightedResponseTimeRule();
+    }
+
+}

spring-cloud/spring-cloud-ribbon-client/src/main/java/com/baeldung/spring/cloud/ribbon/client/ServerLocationApp.java

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+package com.baeldung.spring.cloud.ribbon.client;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.loadbalancer.LoadBalanced;
+import org.springframework.cloud.netflix.ribbon.RibbonClient;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.client.RestTemplate;
+
+@SpringBootApplication
+@RestController
+@RibbonClient(name = "ping-a-server", configuration = RibbonConfiguration.class)
+public class ServerLocationApp {
+
+    @LoadBalanced
+    @Bean
+    RestTemplate getRestTemplate() {
+        return new RestTemplate();
+    }
+
+    @Autowired
+    RestTemplate restTemplate;
+
+    @RequestMapping("/server-location")
+    public String serverLocation() {
+        String servLoc = this.restTemplate.getForObject("http://ping-server/locaus", String.class);
+        return servLoc;
+    }
+
+    public static void main(String[] args) {
+        SpringApplication.run(ServerLocationApp.class, args);
+    }
+}

spring-cloud/spring-cloud-ribbon-client/src/main/resources/application.yml

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+spring:
+  application:
+    name: spring-cloud-ribbon
+
+server:
+  port: 8888
+
+ping-server:
+  ribbon:
+    eureka:
+      enabled: false
+    listOfServers: localhost:9092,localhost:9999
+    ServerListRefreshInterval: 15000

spring-cloud/spring-cloud-ribbon-client/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>

spring-cloud/spring-cloud-ribbon-client/src/test/java/com/baeldung/spring/cloud/ribbon/client/ServerLocationAppIntegrationTest.java

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+package com.baeldung.spring.cloud.ribbon.client;
+
+import static org.assertj.core.api.BDDAssertions.then;
+import static org.junit.Assert.assertEquals;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.context.embedded.LocalServerPort;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@SuppressWarnings("unused")
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = ServerLocationApp.class, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class ServerLocationAppIntegrationTest {
+    ConfigurableApplicationContext application2;
+    ConfigurableApplicationContext application3;
+
+    @Before
+    public void startApps() {
+        this.application2 = startApp(9092);
+        this.application3 = startApp(9999);
+    }
+
+    @After
+    public void closeApps() {
+        this.application2.close();
+        this.application3.close();
+    }
+
+    @LocalServerPort
+    private int port;
+
+    @Autowired
+    private TestRestTemplate testRestTemplate;
+
+    @Test
+    public void loadBalancingServersTest() throws InterruptedException {
+        ResponseEntity<String> response = this.testRestTemplate.getForEntity("http://localhost:" + this.port + "/server-location", String.class);
+        assertEquals(response.getBody(), "Australia");
+    }
+
+    private ConfigurableApplicationContext startApp(int port) {
+        return SpringApplication.run(TestConfig.class, "--server.port=" + port, "--spring.jmx.enabled=false");
+    }
+}

spring-cloud/spring-cloud-ribbon-client/src/test/java/com/baeldung/spring/cloud/ribbon/client/TestConfig.java

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+package com.baeldung.spring.cloud.ribbon.client;
+
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@Configuration
+@EnableAutoConfiguration
+@RestController
+public class TestConfig {
+
+    @RequestMapping(value = "/locaus")
+    public String locationAUSDetails() {
+        return "Australia";
+    }
+}

spring-cloud/spring-cloud-ribbon-client/src/test/java/org/baeldung/SpringContextIntegrationTest.java

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+package org.baeldung;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.spring.cloud.ribbon.client.ServerLocationApp;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = ServerLocationApp.class)
+public class SpringContextIntegrationTest {
+
+    @Test
+    public void whenSpringContextIsBootstrapped_thenNoExceptions() {
+    }
+}

spring-cloud/spring-cloud-ribbon-client/src/test/java/org/baeldung/SpringContextTest.java

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+package org.baeldung;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.spring.cloud.ribbon.client.ServerLocationApp;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = ServerLocationApp.class)
+public class SpringContextTest {
+
+    @Test
+    public void whenSpringContextIsBootstrapped_thenNoExceptions() {
+    }
+}