My best guess is that the Action instance used in the web application is
not actually loaded from the configuration in your applicationContext,
but directly by Struts 2 (through the Spring Factory, but still Struts 2).
That mean that you will have a bean named myAction in you application
context, but that is not the bean that will actually be used by Struts
to serve your request. Struts will create another instance, which won't
have any of your configuration. This different instance is then
autowired by type (defaut behaviour) which means your service
(configured in your context) gets injected because it has the right type.
I can't actually confirm that behaviour, but that seems like the likely
explanation. I will be able to double check tomorrow.
To check that, I can recommend 2 things :
* Set the autowiring to be by name, create 2 beans named verbose and
message, and see how that works
* Leaving the autowiring by type, create 2 instances of your service,
and my best guess is that Struts will crash, unable to decide between the 2
I think what your are missing is the fact that while struts uses Spring
to manage the lifecycle of its action, it doesn't use the action defined
in your application context, but will load its own instances, and
autowire them.
Denis.
Le 2010-05-13 20:18, Jake Vang a écrit :
roger,
thanks for the steps. i went through each of those steps and made sure
my settings/configurations complied. however, i still cannot
initialize Action classes using Spring.
as an illustration of the problem i am facing, i have created an
example that you may download and verify for yourself that this does
not work.
http://www.box.net/shared/iycamr9uo6
this will download a zip file with an Eclipse project; unzip it. if
you have Ant, you simply type in "ant war" and the war file will be
created. if you have Tomcat, then drop the war file into the webapps
directory (assuming you have Tomcat 6.0).
if you go to http://localhost:8080/myapp/, you will see four lines displayed.
String from Action: default
boolean from Action: false
String from Service: overwritten
boolean from Service: true
The first and second lines confirm that the String and boolean values
are not injected into the Action class. The third and fourth lines
confirm that the String and boolean values are injected into the
service class.
thanks.
On Thu, May 13, 2010 at 9:32 AM, RogerV<roger.var...@googlemail.com> wrote:
Jake Vang wrote:
If you want Spring to create your action class (as opposed to Struts
creating them) then you need to define your action in the
applicationContext.xml file.
how do you do that? here's a couple of ways i have tried that do NOT work.
1) Add<constant name="struts.objectFactory"
value="org.apache.struts2.spring.StrutsSpringObjectFactory" /> to your
struts.xml file.
2) Add<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
to your web.xml
3) Make sure that you have the Struts2 Spring plugin installed.
4) Put something along the lines of
<bean id="myAction" class="com.somwhere.mypackage.MyAction"
scope="prototype"/> (The scope prototype is important otherwise Spring
creates a singleton rather than a new action on each invocation which is
what Struts 2 expects)
and that should get Spring instantiating your action classes for you.
Although I'm guessing from your response you've already got to that stage.
I'm not sure that I understand what you are trying to acheive with
<bean name="/action" class="com.services.MyAction">
<property name="propertyA" value="${propertyA}"/>
</bean>
If you're trying to inject another class, then the format is on the lines of
<bean name="/action" class="com.services.MyAction">
<property name="classA" ref="classA"/>
</bean>
where you need a setter that matches the name parameter (setClassA(ClassA
classA)) in MyAction. The ref value points to another<bean id="classA"
class="com.services.classA"/>
HTH and I haven't completely misunderstood what you are trying to do.
Regards
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