/*
* Copyright 2013-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.cloud.netflix.feign.ribbon;
import com.netflix.loadbalancer.Server;
import com.netflix.loadbalancer.ServerList;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
import org.springframework.cloud.netflix.feign.EnableFeignClients;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.cloud.netflix.ribbon.RibbonClient;
import org.springframework.cloud.netflix.ribbon.StaticServerList;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.test.annotation.DirtiesContext;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;
import java.util.concurrent.atomic.AtomicInteger;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
/**
* Tests the Feign Retryer, not ribbon retry.
* @author Spencer Gibb
*/
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = FeignRibbonClientRetryTests.Application.class, webEnvironment = WebEnvironment.RANDOM_PORT, value = {
"spring.application.name=feignclientretrytest", "feign.okhttp.enabled=false",
"feign.httpclient.enabled=false", "feign.hystrix.enabled=false", "localapp.ribbon.MaxAutoRetries=2",
"localapp.ribbon.MaxAutoRetriesNextServer=3"})
@DirtiesContext
public class FeignRibbonClientRetryTests {
@Value("${local.server.port}")
private int port = 0;
@Autowired
private TestClient testClient;
@FeignClient("localapp")
protected interface TestClient {
@RequestMapping(method = RequestMethod.GET, value = "/hello")
Hello getHello();
@RequestMapping(method = RequestMethod.GET, value = "/retryme")
int retryMe();
}
@Configuration
@EnableAutoConfiguration
@RestController
@EnableFeignClients(clients = TestClient.class)
@RibbonClient(name = "localapp", configuration = LocalRibbonClientConfiguration.class)
public static class Application {
private AtomicInteger retries = new AtomicInteger(1);
@RequestMapping(method = RequestMethod.GET, value = "/hello")
public Hello getHello() {
return new Hello("hello world 1");
}
@RequestMapping(method = RequestMethod.GET, value = "/retryme")
public int retryMe() {
return this.retries.getAndIncrement();
}
public static void main(String[] args) throws InterruptedException {
new SpringApplicationBuilder(Application.class)
.properties("spring.application.name=feignclientretrytest",
"management.contextPath=/admin")
.run(args);
}
}
@Test
public void testClient() {
assertNotNull("testClient was null", this.testClient);
assertTrue("testClient is not a java Proxy",
Proxy.isProxyClass(this.testClient.getClass()));
InvocationHandler invocationHandler = Proxy.getInvocationHandler(this.testClient);
assertNotNull("invocationHandler was null", invocationHandler);
}
@Test
public void testRetries() {
int retryMe = this.testClient.retryMe();
assertEquals("retryCount didn't match", retryMe, 1);
// TODO: not sure how to verify retry happens. Debugging through it, it works
// maybe the assertEquals above is enough because of the bogus servers
}
@Data
@AllArgsConstructor
@NoArgsConstructor
public static class Hello {
private String message;
}
}
// Load balancer with fixed server list for "local" pointing to localhost
// some bogus servers are thrown in to test retry
@Configuration
class LocalRibbonClientConfiguration {
@Value("${local.server.port}")
private int port = 0;
@Bean
public ServerList<Server> ribbonServerList() {
return new StaticServerList<>(new Server("mybadhost", 80),
new Server("mybadhost2", 10002),
new Server("mybadhost3", 10003), new Server("localhost", this.port));
}
}