How to write a spring bean with a constructor that contains a list?

Question

I have a list as follows:

ArrayList<DiameterMessageHandler> handlers = new ArrayList<>(); handlers.add(new AARHandler()); handlers.add(new CERHandler()); handlers.add(new PPAHandler()); handlers.add(new STRHandler()); handlers.add(new DWRHandler()); 

I am wondering how to create a spring bean that takes handlers as one of its arguments, i.e. is it possible to do this in the applicationContext.xml - Do I have to create separate beans for the list and each of the handlers(AARHandler etc) first? Here is my applicationContext.xml

<bean id="DiameterClient" class="com.rory.ptspsim.diameterclient.DiameterClient" scope="singleton" init-method="start">         <constructor-arg type="java.lang.String" index="0"><value>${pcca.host}</value></constructor-arg>               <constructor-arg index="1">WHAT GOES HERE?</constructor-arg>             </bean> 

Answer 1

Probably you want all these handlers be Spring beans too. This is the configuration:

<bean id="DiameterClient" class="com.rory.ptspsim.diameterclient.DiameterClient" init-method="start">     <constructor-arg value="${pcca.host}" />     <constructor-arg>         <list>             <ref bean="aarHandler" />             ...         </list>     </constructor-arg>       </bean>  <bean id="aarHandler" class="com.rory.ptspsim.diameterclient.AARHandler" />