/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 sample.rs.client;
import java.util.LinkedList;
import java.util.List;
import javax.ws.rs.core.UriBuilder;
import org.apache.cxf.annotations.Provider;
import org.apache.cxf.annotations.Provider.Type;
import org.apache.cxf.clustering.FailoverStrategy;
import org.apache.cxf.clustering.RandomStrategy;
import org.apache.cxf.clustering.circuitbreaker.CircuitBreakerFailoverFeature;
import org.apache.cxf.jaxrs.client.spring.EnableJaxRsProxyClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
import sample.rs.service.HelloService;
@SpringBootApplication
@EnableEurekaClient
@EnableJaxRsProxyClient
public class SampleRestClientApplication {
public static void main(String[] args) {
new SpringApplicationBuilder(SampleRestClientApplication.class)
.web(false)
.run(args);
}
@Bean
CommandLineRunner initProxyClient(final HelloService service) {
return new CommandLineRunner() {
@Override
public void run(String... runArgs) throws Exception {
System.out.println(service.sayHello("ApacheCxfProxyUser1"));
System.out.println(service.sayHello("ApacheCxfProxyUser2"));
}
};
}
/**
* Basic Random selection of statically prepared addresses.
* More advanced strategies will periodically pull DiscoveryClient
* to update the addresses list
*/
@Component
@Provider(Type.Feature)
static class EurekaFailoverFeature extends CircuitBreakerFailoverFeature {
@Autowired
DiscoveryClient discoveryClient;
List<String> addresses = new LinkedList<String>();
EurekaFailoverFeature() {
super("eureka://registry");
}
@Override
public FailoverStrategy getStrategy() {
for (ServiceInstance s : discoveryClient.getInstances("jaxrs-hello-world-service")) {
UriBuilder ub = UriBuilder.fromUri(s.getUri());
if (s.getMetadata().containsKey("servletPath")) {
ub.path(s.getMetadata().get("servletPath"));
}
addresses.add(ub.build().toString());
}
RandomStrategy rs = new RandomStrategy();
rs.setAlternateAddresses(addresses);
return rs;
}
}
}