DATAMONGO-685 - ServerInfo should return used hostname reported by MongoDB.

Added test case getHostNameShouldReturnServerNameReportedByMongo() to MongoMonitorIntegrationTests. Modified MongoMonitorIntegrationTests to use common mongo-infrastructure configuration. ServerInfo.getHostName() is now derived from serverStatus.serverUsed.

Original pull request: #51.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/monitor/ServerInfo.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2013 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.
@@ -15,19 +15,20 @@
  */
 package org.springframework.data.mongodb.monitor;
 
-import java.net.InetAddress;
 import java.net.UnknownHostException;
 
-import com.mongodb.Mongo;
 import org.springframework.jmx.export.annotation.ManagedMetric;
 import org.springframework.jmx.export.annotation.ManagedOperation;
 import org.springframework.jmx.export.annotation.ManagedResource;
 import org.springframework.jmx.support.MetricType;
 
+import com.mongodb.Mongo;
+
 /**
  * Expose basic server information via JMX
  * 
  * @author Mark Pollack
+ * @author Thomas Darimont
  */
 @ManagedResource(description = "Server Information")
 public class ServerInfo extends AbstractMonitor {
@@ -36,9 +37,20 @@ public class ServerInfo extends AbstractMonitor {
 		this.mongo = mongo;
 	}
 
+	/**
+	 * Returns the hostname of the used server reported by mongo.
+	 * 
+	 * @return the reported hostname can also be an IP address.
+	 * @throws UnknownHostException
+	 */
 	@ManagedOperation(description = "Server host name")
 	public String getHostName() throws UnknownHostException {
-		return InetAddress.getLocalHost().getHostName();
+
+		/* 
+		 * UnknownHostException is not necessary anymore, but clients could have
+		 * called this method in a try..catch(UnknownHostException) already
+		 */
+		return getServerStatus().getServerUsed().getHost();
 	}
 
 	@ManagedMetric(displayName = "Uptime Estimate")

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/monitor/MongoMonitorIntegrationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2013 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.
@@ -15,28 +15,32 @@
  */
 package org.springframework.data.mongodb.monitor;
 
-import com.mongodb.Mongo;
+import static org.hamcrest.Matchers.*;
+import static org.junit.Assert.*;
+
+import java.net.UnknownHostException;
+
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.data.mongodb.monitor.OperationCounters;
-import org.springframework.data.mongodb.monitor.ServerInfo;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
 
+import com.mongodb.Mongo;
+
 /**
  * This test class assumes that you are already running the MongoDB server.
  * 
  * @author Mark Pollack
+ * @author Thomas Darimont
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@ContextConfiguration
+@ContextConfiguration("classpath:infrastructure.xml")
 public class MongoMonitorIntegrationTests {
 
-	@Autowired
-	Mongo mongo;
+	@Autowired Mongo mongo;
 
 	@Test
 	public void serverInfo() {
@@ -45,6 +49,26 @@ public class MongoMonitorIntegrationTests {
 		Assert.isTrue(StringUtils.hasText("1."));
 	}
 
+	/**
+	 * @throws UnknownHostException
+	 * @see DATAMONGO-685
+	 */
+	@Test
+	public void getHostNameShouldReturnServerNameReportedByMongo() throws UnknownHostException {
+
+		ServerInfo serverInfo = new ServerInfo(mongo);
+
+		String hostName = null;
+		try {
+			hostName = serverInfo.getHostName();
+		} catch (UnknownHostException e) {
+			throw e;
+		}
+
+		assertThat(hostName, is(notNullValue()));
+		assertThat(hostName, is("127.0.0.1"));
+	}
+
 	@Test
 	public void operationCounters() {
 		OperationCounters operationCounters = new OperationCounters(mongo);