Allow empty path in AMQP URIs to support using the default vhost.

spring-cloud-core/src/main/java/org/springframework/cloud/service/common/AmqpServiceInfo.java

@@ -61,15 +61,14 @@ public class AmqpServiceInfo extends UriBasedServiceInfo {
 		}
 
 		String path = uriInfo.getPath();
-		if (path == null) {
-			throw new IllegalArgumentException("Missing virtual host in amqp URI: " + uriInfo);
-		} else {
+		if (path != null) {
 			// Check that the path only has a single segment.  As we have an authority component
 			// in the URI, paths always begin with a slash.
 			if (path.indexOf('/') != -1) {
 				throw new IllegalArgumentException("Multiple segments in path of amqp URI: " + uriInfo);
 			}
 		}
+
 		return uriInfo;
 	}
 }

spring-cloud-spring-service-connector/src/test/java/org/springframework/cloud/service/rabbit/RabbitServiceInfoTest.java

@@ -1,6 +1,7 @@
 package org.springframework.cloud.service.rabbit;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
 
 import org.junit.Test;
 import org.springframework.cloud.service.common.AmqpServiceInfo;
@@ -22,6 +23,17 @@ public class RabbitServiceInfoTest {
 		assertEquals("myvhost", serviceInfo.getVirtualHost());
 	}
 
+	@Test
+	public void uriBasedParsingDefaultVhost() {
+		AmqpServiceInfo serviceInfo = new AmqpServiceInfo("id", "amqp://myuser:mypass@myhost:12345/");
+
+		assertEquals("myhost", serviceInfo.getHost());
+		assertEquals(12345, serviceInfo.getPort());
+		assertEquals("myuser", serviceInfo.getUserName());
+		assertEquals("mypass", serviceInfo.getPassword());
+		assertNull(serviceInfo.getVirtualHost());
+	}
+
 	@Test(expected=IllegalArgumentException.class)
 	public void missingScheme() {
 		new AmqpServiceInfo("id",  "://myuser:mypass@:12345/myvhost");
@@ -48,11 +60,6 @@ public class RabbitServiceInfoTest {
 		new AmqpServiceInfo("id",  "amqp://myhost:12345/myvhost");
 	}
 
-	@Test(expected=IllegalArgumentException.class)
-	public void missingVirtualHost() {
-		new AmqpServiceInfo("id",  "amqp://myuser:mypass@myhost:12345");
-	}
-	
 	@Test(expected=IllegalArgumentException.class)
 	public void badVirtualHost() {
 		new AmqpServiceInfo("id",  "amqp://myuser:mypass@myhost:12345/a/b");