diff -urBN jmxquery.a/src/jmxquery/src/org/munin/JMXQuery.java jmxquery.b/src/jmxquery/src/org/munin/JMXQuery.java
--- jmxquery.a/src/jmxquery/src/org/munin/JMXQuery.java	2007-05-14 01:07:44.000000000 -0700
+++ jmxquery.b/src/jmxquery/src/org/munin/JMXQuery.java	2010-01-15 15:40:00.000000000 -0800
@@ -61,7 +61,7 @@
 		this.password = password;
 	}
 
-	private void connect() throws IOException
+	public void connect() throws IOException
 	{
 		Map<String, Object> environment = null;
 		if (username != null && password != null)
@@ -78,7 +78,18 @@
 		connection = connector.getMBeanServerConnection();		
 	}
 
-	private void list() throws IOException, InstanceNotFoundException, IntrospectionException, ReflectionException
+	public void ping() throws IOException
+	{
+	  try {
+	    MBeanServerConnection testConnection = connector.getMBeanServerConnection();
+	    if (testConnection == null)
+	       this.connect();
+	  } catch (IOException e) {
+	    this.connect();
+	  }
+	}
+	
+	public void list() throws IOException, InstanceNotFoundException, IntrospectionException, ReflectionException
 	{
 		if (config == null)
 		{
@@ -90,7 +101,7 @@
 		}
 	}
 
-	private void listConfig()
+	public void listConfig()
 	{
 		for (FieldProperties field : config.getFields())
 		{
@@ -107,7 +118,22 @@
 		}
 	}
 
-	private void output(String name, Object attr, String key)
+	public String output(String name, String JmxObjectName, String JmxAttributeName, String Key)
+	{
+    try
+    {
+      Object value = connection.getAttribute(new ObjectName(JmxObjectName), JmxAttributeName);
+      return output(name, value, Key);
+    } 
+    catch (Exception e)
+    {
+      System.err.println("Fail to output " + name);
+      e.printStackTrace();
+    }
+    return null;
+	}
+	
+	public String output(String name, Object attr, String key)
 	{
 		if (attr instanceof CompositeDataSupport)
 		{
@@ -116,15 +142,17 @@
 			{
 				throw new IllegalArgumentException("Key is null for composed data " + name);
 			}
-			System.out.println(name + ".value " + format(cds.get(key)));
+			//System.out.println(name + ".value " + format(cds.get(key)));
+			return format(cds.get(key));
 		} 
 		else
 		{
-			System.out.println(name + ".value " + format(attr));
+			//System.out.println(name + ".value " + format(attr));
+		  return format(attr);
 		}
 	}
 
-	private void output(String name, Object attr)
+	public void output(String name, Object attr)
 	{
 		if (attr instanceof CompositeDataSupport)
 		{
@@ -142,7 +170,7 @@
 	}
 
 	@SuppressWarnings("unchecked")
-	private void listAll() throws IOException, InstanceNotFoundException, IntrospectionException, ReflectionException
+	public void listAll() throws IOException, InstanceNotFoundException, IntrospectionException, ReflectionException
 	{
 		Set<ObjectName> mbeans = connection.queryNames(null, null);
 		for (ObjectName name : mbeans)
@@ -156,7 +184,7 @@
 			}
 			try
 			{
-				List<Attribute> attributes = connection.getAttributes(name, attrNames);
+				List<Attribute> attributes = connection.getAttributes(name, attrNames).asList();
 				for (Attribute attribute : attributes)
 				{
 					output(name.getCanonicalName() + "%" + attribute.getName(), attribute.getValue());
@@ -170,7 +198,7 @@
 		}
 	}
 
-	private String format(Object value)
+	public String format(Object value)
 	{
 		if (value == null)
 		{
@@ -194,7 +222,7 @@
 		return value.toString();
 	}
 
-	private void disconnect() throws IOException
+	public void disconnect() throws IOException
 	{
 		connector.close();
 	}
@@ -293,7 +321,7 @@
 
 	}
 
-	private void setConfig(Configuration configuration)
+	public void setConfig(Configuration configuration)
 	{
 		this.config = configuration;
 	}