Is here a category of JMX?

[bellmann29]

Hello,

I´m looking for some Information about Spring with JMX but there isn´t a category for that.

I tried the examples written by Rob Harrop but they doesn´t work. Maybe I made some mistakes but it is a very easy example.

First thing is: he didn´t use the right package-name. "org.springframework.jmx.MBeanExporter" doesn´t exist in 1.2RC1. It´s "org.springframework.jmx.export.MBeanExporter" .

That´s not a big problem, I find the right one. I configured it like the example. But it seems that the container ignored the "MBeanExporter". There are no infos that he (the container) find or use it. I got only messages for the normal shared beans I want to expose to the mbean-server. I tried it with a running mbean-server I started before configuration of spring-container. And I tried it with the "MBeanServerFactoryBean" with a MX4J-Implementation in the classpath.

So, if any read this stuff I wrote, maybe give me some feedback for this problem or post some other (maybe better) examples for using JMX with the springframework.

[robh]

There is some draft documentation on the Wiki - but you are right tat some of the package names have changed during our refactoring efforts.

Can you post your context configuration and the code you are using to load the context?

Rob

[bellmann29]

Hi Rob,

nice to meet you.

I tried both examples.
Here is the configuration for my first try.

<?xml version="1.0" ?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http&#58;//www.springframework.org/dtd/spring-beans.dtd">
<beans>
	<bean id="myFirstBean" class="net.jbellmann.spring.test.MyBean">
		<property name="name">
			<value>Bello</value>
		</property>
		<property name="i">
			<value>31</value>
		</property>
	</bean>
	
	<bean id="jmxAdapter" class="org.springframework.jmx.export.MBeanExporter">
		<property name="beans">
			<map>
				<entry key="bean&#58;name=testBean1">
					<ref local="myFirstBean"/>
				</entry>
			</map>
		</property>
		<property name="server">
			<ref local="mbeanServer" />
		</property>
	</bean>
	
	<bean id="mbeanServer" class="org.springframework.jmx.support.MBeanServerFactoryBean" />
</beans>

Here is the Bean for both examples.

package net.jbellmann.spring.test;

/**
 * @author Bello
 *
 */
public class MyBean implements IMyBean{
	
	private static final String NAME = "Mein Name ist: ";
	private static final String ALTER = "Mein Alter ist: ";
	private static final String FREE = " ";
	private static final String BREAK = "\n";
	
	private String name;
	private int i;
	
	public MyBean(){
		//
	}

	public int getI() {
		return i;
	}
	

	public void setI(int i) {
		this.i = i;
	}
	

	public String getName() {
		return name;
	}
	

	public void setName(String name) {
		this.name = name;
	}
	
	public String toString(){
		StringBuffer sb = new StringBuffer();
		sb.append(NAME);
		sb.append(name);
		sb.append(BREAK);
		sb.append(ALTER);
		sb.append(i);
		sb.append(FREE);
		return sb.toString();
	}

}

It´s nearly the same as on your examples.
Here I had the following jar´s in Classpath. mx4j; mx4j-tools and commons-logging.
MX4J is the JMX-Implementation, i think you know it.

Ok the output on console is:

13.04.2005 18:03:09 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from file [C:\myProjects\SpringTest\conf\beans.xml]
13.04.2005 18&#58;03&#58;09 org.springframework.core.CollectionFactory <clinit>
INFO&#58; JDK 1.4+ collections available
13.04.2005 18&#58;03&#58;10 org.springframework.beans.factory.support.AbstractBeanFactory getBean
INFO&#58; Creating shared instance of singleton bean 'myFirstBean'
Mein Name ist&#58; Bello
Mein Alter ist&#58; 31

There are no information on any jmx-specifics.

I tried it also with a started MBean-Server before instantiating/starting the spring-container. The configuration-file will follow. The result is the same.
No information on any jmx-action in the spring-container.

Application configured successfully
HttpAdaptor version 3.0.1 started on port 9090
13.04.2005 18:08:39 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from file [C:\myProjects\SpringTest\conf\beans.xml]
13.04.2005 18&#58;08&#58;39 org.springframework.core.CollectionFactory <clinit>
INFO&#58; JDK 1.4+ collections available
13.04.2005 18&#58;08&#58;39 org.springframework.beans.factory.support.AbstractBeanFactory getBean
INFO&#58; Creating shared instance of singleton bean 'myFirstBean'
Mein Name ist&#58; Bello
Mein Alter ist&#58; 31

conf:

<?xml version="1.0" ?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http&#58;//www.springframework.org/dtd/spring-beans.dtd">
<beans>
	<bean id="myFirstBean" class="net.jbellmann.spring.test.MyBean">
		<property name="name">
			<value>Bello</value>
		</property>
		<property name="i">
			<value>31</value>
		</property>
	</bean>
	
	<bean id="jmxAdapter" class="org.springframework.jmx.export.MBeanExporter">
		<property name="beans">
			<map>
				<entry key="bean&#58;name=testBean1">
					<ref local="myFirstBean"/>
				</entry>
			</map>
		</property>
	</bean>
</beans>

Ok, that´s all I can post. If you need further information, no problem.
If I understand you right, there is nothing more to do to get it running.

Thank you

[robh]

It looks like you may be using a BeanFactory to load the Spring configuration. If you do this the MBeanExporter won't be found automatically. Instead you should use an ApplicationContext implementation like ClassPathXmlApplicationContext.

Rob

[bellmann29]

Hi Rob,

thanks for your reply. It works now fine with MBeanServerFactoryBean and ClassPathXMLApplicationContext.

With a running MBean-Server, started before Spring-Container, I got a MBeanServerNotFoundException. Don´t know why.

So, I played a little bit with HttpAdaptor and XSLTProcessor from MX4J and got it running. I will contribute this here for some other which are interessted in.

It´s up to you to take it for new examples in the wiki-draft-documentation.
But you don´t have to.

If there is a way me to support this wiki or spring generally with some tuts or documents, write me a message.

Here it is:

package net.jbellmann.spring.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringFactoryUtil {
	
	private static ApplicationContext context;
	
	static{
		context = new ClassPathXmlApplicationContext("beans.xml");
	}
	
	public static Object getBean(String name){
		return context.getBean(name);
	}
	
	public static void refresh(){
		context.publishEvent(new ContextRefreshedEvent(context));
	}

}

Important here to use ClassPathXMLApplicationContext! thanks rob

The MainClass:

package net.jbellmann.test;

import java.io.IOException;

import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;

import mx4j.tools.adaptor.http.HttpAdaptor;
import net.jbellmann.spring.test.MyBean;
import net.jbellmann.spring.test.SpringFactoryUtil;

/**
 * @author Bello
 *
 */
public class MainClass {
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		MainClass mc = new MainClass();
		mc.startIt();
	}
	
	public void startIt(){
		MyBean bean = (MyBean)SpringFactoryUtil.getBean("myFirstBean");
		System.out.println(bean.toString());
		HttpAdaptor httpAdaptor = (HttpAdaptor)SpringFactoryUtil.getBean("httpConnector");
		try {
			ObjectName on = ObjectName.getInstance("bean:name=xsltProcessor");
			httpAdaptor.setProcessorName(on);
			httpAdaptor.start();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (MalformedObjectNameException e) {
			e.printStackTrace();
		} catch (NullPointerException e) {
			e.printStackTrace();
		}
	}
}

and the Configuration-File:

<?xml version="1.0" ?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http&#58;//www.springframework.org/dtd/spring-beans.dtd">
<beans>
	<bean id="myFirstBean" class="net.jbellmann.spring.test.MyBean">
		<property name="name">
			<value>Bello</value>
		</property>
		<property name="i">
			<value>31</value>
		</property>
	</bean>
	
	<bean id="jmxAdapter" class="org.springframework.jmx.export.MBeanExporter">
		<property name="beans">
			<map>
				<entry key="bean&#58;name=testBean1">
					<ref local="myFirstBean"/>
				</entry>
				<entry key="bean&#58;name=httpConnector">
					<ref local="httpConnector"/>
				</entry>
				<entry key="bean&#58;name=xsltProcessor">
					<ref local="xsltProcessor"/>
				</entry>
			</map>
		</property>
		<property name="server">
			<ref local="mbeanServer" />
		</property>
	</bean>
	
	<bean id="httpConnector" class="mx4j.tools.adaptor.http.HttpAdaptor">
		<property name="port">
			<value>9090</value>
		</property>
		<property name="host">
			<value>localhost</value>
		</property>
	</bean>

	<bean id="xsltProcessor" class="mx4j.tools.adaptor.http.XSLTProcessor" />

	<bean id="mbeanServer" class="org.springframework.jmx.support.MBeanServerFactoryBean" />
</beans>

For playing with the MBeans, open a browser with

http://localhost:9090

Hope, everybody is understanding my bad english writing. But if could here me, you would run away.

Greetings from Berlin / Germany

Thanks again to Rob for the fast reply.

[bellmann29]

Hi,

in the code i posted before is a method that should not be there. Delete the

refresh() - Mehtod in SpringFactoryUtil

I don´t use this method in the example posted. It was only a little test.

Bello