org.zodiac.eureka.client.EurekaAppDiscoveryClient Maven / Gradle / Ivy

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package org.zodiac.eureka.client;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.zodiac.core.application.AppInstance;
import org.zodiac.core.application.ApplicationInfo;
import org.zodiac.core.bootstrap.discovery.AppDiscoveryClient;
import org.zodiac.eureka.base.instance.EurekaAppInstance;

import com.netflix.appinfo.EurekaInstanceConfig;
import com.netflix.appinfo.InstanceInfo;
import com.netflix.discovery.EurekaClient;
import com.netflix.discovery.EurekaClientConfig;
import com.netflix.discovery.shared.Application;
import com.netflix.discovery.shared.Applications;

public class EurekaAppDiscoveryClient implements AppDiscoveryClient {

    public static final String DESCRIPTION = "Eureka Application Discovery Client";

    private ApplicationInfo applicationInfo;

    private final EurekaClientConfig clientConfig;
    private final EurekaInstanceConfig instanceConfig;

    private final EurekaClient eurekaClient;

    public EurekaAppDiscoveryClient(ApplicationInfo applicationInfo, EurekaClientConfig clientConfig,
        EurekaInstanceConfig instanceConfig, EurekaClient eurekaClient) {
        this.applicationInfo = applicationInfo;
        this.clientConfig = clientConfig;
        this.instanceConfig = instanceConfig;
        this.eurekaClient = eurekaClient;
    }

    @Override
    public String clientDescription() {
        return DESCRIPTION;
    }

    @Override
    public List getAppInstances(String serviceId) {
        List infos = this.eurekaClient.getInstancesByVipAddress(serviceId, false);
        List instances = new ArrayList<>();
        for (InstanceInfo instance : infos) {
            instances.add(new EurekaAppInstance(applicationInfo, instance, clientConfig, instanceConfig));
        }
        return instances;
    }

    @Override
    public List getServiceList() {
        Applications applications = this.eurekaClient.getApplications();
        if (applications == null) {
            return Collections.emptyList();
        }
        List registered = applications.getRegisteredApplications();
        List names = new ArrayList<>();
        for (Application app : registered) {
            if (app.getInstances().isEmpty()) {
                continue;
            }
            names.add(app.getName().toLowerCase());

        }
        return names;
    }

}