Spring web app. One war multiple application context

I searched for a while but can't manage to find a proper solution to my problem.

I have one WAR web application and I want 2 spring applications running in it one for the web-part, one running scheduled task. Both applications share a lot of beans so I would like that those two applications share some beans instance.

I'd like to split my contexts in:
-shared-context.xml
-web-context.xml
-task-context.xml

Web-context and task-context must be isolated and not see each other. They need to create a few beans that are the same but have different configs.

Is this possible? And how should I do it?

I tried first to put <import resource="classpath:shared-context.xml" /> in both web-context and task context and to configure my web.xml as

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>web-context.xml task-context.xml</param-value>
</context-param>

but the problem is that there is no isolation between web and task. They all share all the beans even the one defined in web-context.xml and task-context.xml

For info here is my web.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<web-app>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/web-context.xml /WEB-INF/task-context.xml</param-value>
    </context-param>

    <!-- Listeners -->
    <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    </listener>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.gwtrpcspring.RemoteServiceDispatcher</servlet-class>
    </servlet>

    <servlet>
        <servlet-name>contentDownloadServlet</servlet-name>
        <servlet-class>ch.olator.servlet.MyContentDownloadServlet</servlet-class> 
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>*.rpc</url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>contentDownloadServlet</servlet-name>
        <url-pattern>/download</url-pattern>
    </servlet-mapping>

    ... some irrelevant filters ...

</web-app>

UPDATED
-To make things clearer I need this isolation between task and web because the task-context which is used to run scheduled task to define some beans that are in web-context but differently. Eg I have scoped-session beans that are in web-context but I need to define them differently for the tasks as scheduled task can't use scoped-session beans.

---

you can use the import tag

in web-context.xml:

<import resource="classpath:shared-context.xml" />
<import resource="classpath:task-context.xml" />

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