[jboss-user] [EJB 3.0] - Error creating MBeanProxy when using @Depends
I used a Trailblazer tutorial as the basis for my example.
http://trailblazer.demo.jboss.com/EJB3Trail/serviceobjects/jmx/index.html
The managment interfaces are Calculator and InvestmentAdvisor. The MBeans are
CalculatorMBean and InvestmentAdvisorMBean. I want to inject Calculator into my other
MBean, InvestmentAdvisorMBean. I receive an MBeanProxy error when deploying on JBoss
4.2.0.GA.
[EJBContainer] STARTED EJB: com.csg.mpg.service.CalculatorMBean ejbName: CalculatorMBean
[STDOUT] Calculator - Creating
[JmxKernelAbstraction] creating wrapper delegate for:
org.jboss.ejb3.service.ServiceContainer
[JmxKernelAbstraction] installing MBean:
jboss.j2ee:jar=mpg-ejbs-1.0.0-SNAPSHOT.jar,name=InvestmentAdvisorMBean,service=EJB3 with
dependencies:
[JmxKernelAbstraction] trail:service=calculator
[EJBContainer] STARTED EJB: com.csg.mpg.service.InvestmentAdvisorMBean ejbName:
InvestmentAdvisorMBean
[STDERR] java.lang.RuntimeException: Error creating MBeanProxy: trail:service=calculator
[STDERR] at org.jboss.mx.util.MBeanProxyExt.init(MBeanProxyExt.java:415)
[STDERR] at org.jboss.mx.util.MBeanProxyExt.(MBeanProxyExt.java:99)
[STDERR] at org.jboss.mx.util.MBeanProxyExt.create(MBeanProxyExt.java:394)
[STDERR] at org.jboss.mx.util.MBeanProxyExt.create(MBeanProxyExt.java:349)
I'd prefer to stick with the following because I can call calculator.calculate
directly.
@Depends ("trail:service=calculator")
public void setCalculator (Calculator calculator) {
this.calculator = calculator;
}
but I discovered that the following works
@Depends ("trail:service=calculator")
private ObjectName calculatorName;
It is clumsy since I have to loop through the various mbean servers (I have
two for some reason) in order get the mbean and then call invoke.
Any thoughts on what I am missing?
Here are my classes
| public interface Calculator {
| // Attribute
| public void setGrowthrate(double g);
|
| public double getGrowthrate();
|
| // The management method
| public double calculate(int start, int end, double saving);
|
| // Life cycle method
| public void create() throws Exception;
|
| public void destroy() throws Exception;
| }
|
| @Service(objectName = "trail:service=calculator")
| @Management(Calculator.class)
| public class CalculatorMBean implements Calculator {
|
| double growthrate;
|
| public void setGrowthrate(double growthrate) {
| this.growthrate = growthrate;
| }
|
| public double getGrowthrate() {
| return growthrate;
| }
|
| public double calculate(int start, int end, double saving) {
| double tmp = Math.pow(1. + growthrate / 12., 12. * (end - start) + 1);
| return saving * 12. * (tmp - 1) / growthrate;
| }
|
| // Lifecycle methods
| public void create() throws Exception {
| growthrate = 0.08;
| System.out.println("Calculator - Creating");
| }
|
| public void destroy() {
| System.out.println("Calculator - Destroying");
| }
|
| }
| public interface InvestmentAdvisor {
|
| // The management method
| public void advise();
|
| // Life cycle method
| public void create() throws Exception;
|
| public void destroy() throws Exception;
| }
| @Service (objectName="trail:service=investmentAdvisor")
| @Management(InvestmentAdvisor.class)
| public class InvestmentAdvisorMBean implements InvestmentAdvisor {
|
| private Calculator calculator;
|
| @Depends ("trail:service=calculator")
| public void setCalculator (Calculator calculator) {
| this.calculator = calculator;
| }
|
| public void create() throws Exception {
| System.out.println("InvestmentAdvisorMBean created");
| }
|
| public void destroy() throws Exception {
| System.out.println("InvestmentAdvisorMBean destroyed");
| }
|
| public void advise() {
| System.out.println("InvestmentAdvisorMBean advising");
| calculator.calculate(25, 65, 300);
|
| }
| }
|
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