added eureka retrival code

Author: Diego Pacheco

hystrix-dashboard/build.gradle

@@ -6,8 +6,12 @@ dependencies {
     compile 'org.apache.httpcomponents:httpclient:4.2.1'
     compile 'log4j:log4j:1.2.17'
     compile 'org.slf4j:slf4j-log4j12:1.7.0'
+    compile 'com.squareup.retrofit:retrofit:2.0.2'
+    compile 'com.squareup.retrofit2:converter-simplexml:2.0.2'
+    compile 'com.squareup.retrofit2:converter-jackson:2.0.2'
+    testCompile 'junit:junit:4.12'
 }
 
 jettyRun {
-        httpPort = 7979
+   httpPort = 7979
 }

hystrix-dashboard/src/main/java/com/netflix/hystrix/dashboard/eureka/EurekaService.java

@@ -0,0 +1,11 @@
+package com.netflix.hystrix.dashboard.eureka;
+
+import com.netflix.hystrix.dashboard.eureka.pojos.Applications;
+
+import retrofit2.Call;
+import retrofit2.http.GET;
+
+public interface EurekaService {
+	@GET("v2/apps/")
+	Call<Applications> listApps();
+}

hystrix-dashboard/src/main/java/com/netflix/hystrix/dashboard/eureka/EurekaServiceInfo.java

@@ -0,0 +1,44 @@
+package com.netflix.hystrix.dashboard.eureka;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.netflix.hystrix.dashboard.eureka.pojos.Application;
+import com.netflix.hystrix.dashboard.eureka.pojos.Applications;
+
+import retrofit2.Call;
+import retrofit2.Retrofit;
+import retrofit2.converter.simplexml.SimpleXmlConverterFactory;
+
+public class EurekaServiceInfo {
+	
+	public Applications retrieveApps() {
+		try{
+			Retrofit retrofit = new Retrofit.
+					Builder().
+					baseUrl("http://127.0.0.1:8080/eureka/").
+					addConverterFactory(SimpleXmlConverterFactory.create()).
+				build();
+
+			EurekaService service = retrofit.create(EurekaService.class);
+			Call<Applications> apps = service.listApps();
+			return apps.execute().body();
+			
+		}catch(Exception e){
+			throw new RuntimeException(e);
+		}
+	}
+	
+	public List<String> retrieveAllAplications(){
+		
+		List<String> applications = new ArrayList<String>();
+		Applications apps = retrieveApps();
+		if (apps==null) return applications;
+		
+		for(Application a: apps.getApplication()){
+			applications.add(a.getName());
+		}
+		return applications;
+	}
+	
+}

hystrix-dashboard/src/main/java/com/netflix/hystrix/dashboard/eureka/pojos/Application.java

@@ -0,0 +1,28 @@
+package com.netflix.hystrix.dashboard.eureka.pojos;
+
+import org.simpleframework.xml.Element;
+import org.simpleframework.xml.Root;
+
+@Root(strict = false)
+public class Application {
+
+	@Element(required=false)
+	private String name;
+
+	public Application() {
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	@Override
+	public String toString() {
+		return "Application [name=" + name + "]";
+	}
+
+}

hystrix-dashboard/src/main/java/com/netflix/hystrix/dashboard/eureka/pojos/Applications.java

@@ -0,0 +1,54 @@
+package com.netflix.hystrix.dashboard.eureka.pojos;
+
+import java.util.ArrayList;
+
+import org.simpleframework.xml.Element;
+import org.simpleframework.xml.ElementList;
+import org.simpleframework.xml.Root;
+
+@Root(strict = false)
+public class Applications {
+
+	@Element
+	private String versions__delta;
+	
+	@Element
+	private String apps__hashcode;
+	
+	@ElementList(inline=true)
+	private ArrayList<Application> application;
+
+	public Applications() {
+	}
+
+	public String getVersions__delta() {
+		return versions__delta;
+	}
+
+	public void setVersions__delta(String versions__delta) {
+		this.versions__delta = versions__delta;
+	}
+
+	public String getApps__hashcode() {
+		return apps__hashcode;
+	}
+
+	public void setApps__hashcode(String apps__hashcode) {
+		this.apps__hashcode = apps__hashcode;
+	}
+
+	public ArrayList<Application> getApplication() {
+		return application;
+	}
+
+	public void setApplication(ArrayList<Application> application) {
+		this.application = application;
+	}
+
+	@Override
+	public String toString() {
+		return "Applications [versions__delta=" + versions__delta + ", apps__hashcode=" + apps__hashcode
+				+ ", application=" + application + "]";
+	}
+
+}

hystrix-dashboard/src/main/test/com/netflix/hytrix/dashboard/eureka/EurekaServiceInfoTest.java

@@ -0,0 +1,24 @@
+package com.netflix.hytrix.dashboard.eureka;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.netflix.hystrix.dashboard.eureka.EurekaServiceInfo;
+
+public class EurekaServiceInfoTest {
+
+	@Test
+	public void testRetrieveAppNames() {
+		EurekaServiceInfo esi = new EurekaServiceInfo();
+		Assert.assertNotNull(esi);
+	}
+	
+	@Test
+	public void TestRetrieveAllAplications() {
+		EurekaServiceInfo esi = new EurekaServiceInfo();
+		Object r = esi.retrieveAllAplications();
+		Assert.assertNotNull(r);
+		System.out.println(r);
+	}
+	
+}