Jruby bean init problem

[marstein]

I am trying to use a scripted bean but get an error.
I am using jruby-1.0.3 and spring-2.5.6

The error message is

ERROR [main] SingletonApplicationContextFactory.getApplicationC ontext(31) | Context
failed to initialize: Error creating bean with name 'RtouBinDAO':
BeanPostProcessor before instantiation of bean failed;
nested exception is org.springframework.beans.factory.BeanCreationExce ption: Error creating
bean with name 'scriptedObject.RtouBinDAO': Invocation of init method failed; nested exception is java.lang.NoSuchMethodException: Couldn't find an init method named 'onInit' on bean with name 'scriptedObject.RtouBinDAO'

The bean definition is

<beans xmlns="http://www.springframework.org/schema/beans"  ....
       default-init-method="onInit">

    <lang:jruby id="RtouBinDAO"
                script-interfaces="com.emeter.e3.dao.ami.ITouBinDAO"
                script-source="classpath:mock_tou_bin_dao.rb">
    </lang:jruby>

The interface is

package com.emeter.e3.dao.ami;

public interface ITouBinDAO
{
    List<TouBin> findBySdp(String sdpUdcId, Date startDate, Date endDate, TimeZone premiseTimeZone) throws DAOException;
}

and finally the ruby code is

require 'java'
include_class 'com.emeter.e3.domain.TouBin'
include_class 'java.util.Date'
include_class 'java.util.HashMap'
include_class 'java.util.List'
include_class 'java.util.TimeZone'
include_class 'com.emeter.e3.dao.ami.ITouBinDAO'

class MockTouBinDAO
    include com.emeter.e3.dao.ami.ITouBinDAO
    @toubinmap = HashMap.new

    def  findBySdp sdpudcid, premisestartdatetime, premiseenddatetime, tz
       @toubinmap.get(sdpudcid+premiseenddatetime.getTime()+premisestartdatetime.getTime())
    end

    def onInit
      puts 'Initializing mock tou bin DAO!!'
    end
end

MockTouBinDAO.new # Spring likes this

I am not sure what is wrong. This seems to follow the examples in the documentation quite nicely. Why the problem "Couldn't find an init method named 'onInit'". I added the onInit() method and this didn't solve the problem. Thanks!!