multiple ContextLoader* definitions - spring-mvc

Question

public class SpringMVCWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
#Override
protected Class<?>[] getRootConfigClasses() {
return new Class[] { LoginApplicationConfig.class };
}
#Override
protected Class<?>[] getServletConfigClasses() {
return null;
}
#Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
}
public class Initializer extends AbstractHttpSessionApplicationInitializer {
public Initializer() {
super(Config.class);
}
}
How can i use both SessionManager and AbstractAnnotationConfigDispatcherServletInitializer without making multiple ContextLoader* definitions?

Answer 1

I had the same issue while working with Spring MVC and initialising multiple initialisers.
Separated the two into different classes and annotated them with Spring #Order(value)
This will be initialised first. The AbstractAnnotationConfigDispatcherServletInitializer will initiate the servlet application context as well as root application context.
import org.springframework.core.annotation.Order;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
#Order(1)
public class Init extends AbstractAnnotationConfigDispatcherServletInitializer {
#Override protected Class<?>[] getRootConfigClasses() {
return new Class[]{Config.class};
}
#Override protected Class<?>[] getServletConfigClasses() {
return null;
}
#Override protected String[] getServletMappings() {
return new String[]{"/*"};
}
}
This will be annotated with #Order(2) This is the second initialisation for the Session initialisation class AbstractHttpSessionApplicationInitializer will ensure that the servlet will use springSessionRepositoryFilter for every request that is responsible for replacing HttpSession implementation by custom implementation backed by Redis more details.
import org.springframework.core.annotation.Order;
import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;
import org.springframework.session.web.context.AbstractHttpSessionApplicationInitializer;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
#Order(2)
#EnableRedisHttpSession(maxInactiveIntervalInSeconds = 600)
public class SessionInit extends AbstractHttpSessionApplicationInitializer {
#Override
public void onStartup(ServletContext servletContext) throws ServletException
{
super.onStartup(servletContext);
}
}