/*
* 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.eureka;
import static com.netflix.appinfo.InstanceInfo.PortType.SECURE;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.springframework.cloud.client.DefaultServiceInstance;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.util.Assert;
import com.netflix.appinfo.EurekaInstanceConfig;
import com.netflix.appinfo.InstanceInfo;
import com.netflix.discovery.EurekaClient;
import com.netflix.discovery.shared.Application;
import com.netflix.discovery.shared.Applications;
import lombok.RequiredArgsConstructor;
/**
* @author Spencer Gibb
*/
@RequiredArgsConstructor
public class EurekaDiscoveryClient implements DiscoveryClient {
public static final String DESCRIPTION = "Spring Cloud Eureka Discovery Client";
private final EurekaInstanceConfig config;
private final EurekaClient eurekaClient;
@Override
public String description() {
return DESCRIPTION;
}
@Override
public ServiceInstance getLocalServiceInstance() {
return new ServiceInstance() {
@Override
public String getServiceId() {
return EurekaDiscoveryClient.this.config.getAppname();
}
@Override
public String getHost() {
return EurekaDiscoveryClient.this.config.getHostName(false);
}
@Override
public int getPort() {
return EurekaDiscoveryClient.this.config.getNonSecurePort();
}
@Override
public boolean isSecure() {
return EurekaDiscoveryClient.this.config.getSecurePortEnabled();
}
@Override
public URI getUri() {
return DefaultServiceInstance.getUri(this);
}
@Override
public Map<String, String> getMetadata() {
return EurekaDiscoveryClient.this.config.getMetadataMap();
}
};
}
@Override
public List<ServiceInstance> getInstances(String serviceId) {
List<InstanceInfo> infos = this.eurekaClient.getInstancesByVipAddress(serviceId,
false);
List<ServiceInstance> instances = new ArrayList<>();
for (InstanceInfo info : infos) {
instances.add(new EurekaServiceInstance(info));
}
return instances;
}
public static class EurekaServiceInstance implements ServiceInstance {
private InstanceInfo instance;
public EurekaServiceInstance(InstanceInfo instance) {
Assert.notNull(instance, "Service instance required");
this.instance = instance;
}
public InstanceInfo getInstanceInfo() {
return instance;
}
@Override
public String getServiceId() {
return this.instance.getAppName();
}
@Override
public String getHost() {
return this.instance.getHostName();
}
@Override
public int getPort() {
if (isSecure()) {
return this.instance.getSecurePort();
}
return this.instance.getPort();
}
@Override
public boolean isSecure() {
// assume if secure is enabled, that is the default
return this.instance.isPortEnabled(SECURE);
}
@Override
public URI getUri() {
return DefaultServiceInstance.getUri(this);
}
@Override
public Map<String, String> getMetadata() {
return this.instance.getMetadata();
}
}
@Override
public List<String> getServices() {
Applications applications = this.eurekaClient.getApplications();
if (applications == null) {
return Collections.emptyList();
}
List<Application> registered = applications.getRegisteredApplications();
List<String> names = new ArrayList<>();
for (Application app : registered) {
if (app.getInstances().isEmpty()) {
continue;
}
names.add(app.getName().toLowerCase());
}
return names;
}
}