[jboss-user] [EJB 3.0] - Error creating MBeanProxy when using @Depends

[mbarker]

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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