add binding host support to jetty integration

governator-jetty/src/main/java/com/netflix/governator/guice/jetty/Archaius2JettyConfig.java

@@ -6,6 +6,8 @@
 @Configuration(prefix="governator.jetty.embedded")
 public interface Archaius2JettyConfig extends JettyConfig {
 
+    String getHost();
+
     @DefaultValue("8080")
     int getPort();
 

governator-jetty/src/main/java/com/netflix/governator/guice/jetty/DefaultJettyConfig.java

@@ -5,6 +5,8 @@
 @Singleton
 public class DefaultJettyConfig implements JettyConfig {
     private int port = 8080;
+
+    private String host;
 
     // Where static files live. We pass this to Jetty for class path scanning to find the exact directory.
     // The default is to use resources supported by the servlet 3.0 spec.
@@ -14,6 +16,11 @@ public class DefaultJettyConfig implements JettyConfig {
 
     private String webAppContextPath = "/";
 
+    @Override
+    public String getHost() {
+    		return host;
+    }
+
     @Override
     public int getPort() {
         return port;
@@ -39,6 +46,11 @@ public String getWebAppContextPath() {
         return webAppContextPath;
     }
 
+    public DefaultJettyConfig setHost(String host) {
+        this.host = host;
+        return this;
+    }
+
     public DefaultJettyConfig setPort(int port) {
         this.port = port;
         return this;

governator-jetty/src/main/java/com/netflix/governator/guice/jetty/JettyConfig.java

@@ -2,6 +2,8 @@
 
 public interface JettyConfig {
 
+    String getHost();
+
     int getPort();
 
     /**

governator-jetty/src/main/java/com/netflix/governator/guice/jetty/JettyModule.java

@@ -1,6 +1,8 @@
 
 package com.netflix.governator.guice.jetty;
 
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
 import java.util.EnumSet;
 import java.util.Set;
 
@@ -183,7 +185,12 @@ protected void configure() {
     @Singleton
     private Server getServer(OptionalJettyConfig optionalConfig, Set<JettyConnectorProvider> jettyConnectors) {
         JettyConfig config = optionalConfig.getJettyConfig();
-        Server server = new Server(config.getPort());
+        Server server;
+        if (config.getHost() != null) {
+    			server = new Server(new InetSocketAddress(config.getHost(), config.getPort()));
+        } else {
+        		server = new Server(config.getPort());
+        }
         Resource staticResourceBase = Resource.newClassPathResource(config.getStaticResourceBase());
         if (staticResourceBase != null) {
             // Set up a full web app since we have static content. We require the app to have its static content

governator-jetty/src/test/java/com/netflix/governator/guice/jetty/JettyServerTest.java

@@ -120,6 +120,37 @@ JettyConfig getConfig() {
 
         injector.close();
     }
+
+    @Test
+    public void testExplicitHostConnectorBinding() throws Exception {
+        LifecycleInjector injector = InjectorBuilder.fromModules(
+                new SampleServletModule(),
+                new ShutdownHookModule(),
+                Modules.override(new JettyModule())
+                        .with(new AbstractModule() {
+                            @Override
+                            protected void configure() {
+                            }
+
+                            @Provides
+                            JettyConfig getConfig() {
+                                // Use ephemeral ports
+                                return new DefaultJettyConfig().setPort(0).setHost("127.0.0.1");
+                            }
+                        })
+                ).createInjector();
+
+        Server server = injector.getInstance(Server.class);
+        Assert.assertEquals(1, server.getConnectors().length);
+
+        int port = ((ServerConnector)server.getConnectors()[0]).getLocalPort();
+
+        // Do a plaintext GET and verify that the default connector works
+        String response = doGet(String.format("http://127.0.0.1:%d/", port), null);
+        Assert.assertTrue(response.startsWith("hello "));
+
+        injector.close();
+    }    
 
     private static String doGet(String url, KeyStore sslTrustStore) throws Exception {