Why are my #components not detected by spring? - spring

Question

This one is tricky - for me at least.Component scan does not seem to work
Here is the web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Geomajas GWT face example application</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:org/geomajas/spring/geomajasContext.xml
classpath:org/geomajas/plugin/rasterizing/DefaultRasterizedPipelines.xml
WEB-INF/applicationContext.xml
<!-- WEB-INF/applicationContext2.xml -->
<!-- WEB-INF/layer*.xml -->
<!-- WEB-INF/map*.xml -->
WEB-INF/layerOsm.xml
WEB-INF/mapOsm.xml
<!-- WEB-INF/applicationContext2.xml -->
</param-value>
</context-param>
<filter>
<filter-name>CacheFilter</filter-name>
<filter-class>org.geomajas.servlet.CacheFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CacheFilter</filter-name>
<url-pattern>*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.geomajas.servlet.PrepareScanningContextListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
<servlet>
<servlet-name>GeomajasServiceServlet</servlet-name>
<servlet-class>org.geomajas.gwt.server.GeomajasServiceImpl</servlet-class>
</servlet>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:META-INF/geomajasWebContext.xml</param-value>
<description>Spring Web-MVC specific (additional) context files.</description>
</init-param>
<load-on-startup>3</load-on-startup>
</servlet>
<!-- SpringGwt remote service servlet -->
<servlet>
<servlet-name>springGwtRemoteServiceServlet</servlet-name>
<servlet-class>org.spring4gwt.server.SpringGwtRemoteServiceServlet</servlet-class>
<init-param>
<param-name>contexConfigLocation</param-name>
<param-value>WEB-INF/applicationContext2.xml</param-value>
<description>j</description>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>GeomajasServiceServlet</servlet-name>
<url-pattern>/showcase/geomajasService</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/d/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>springGwtRemoteServiceServlet</servlet-name>
<url-pattern>/showcase/springGwtServices/test</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
And my service :
#Service("test")
public class ProjServiceImpl extends RemoteServiceServlet implements ProjService {
private static final Log LOG = LogFactory.getLog(ProjServiceImpl.class);
#Autowired
PoiCategDAO poiCategDAO;
public String greetServer(String input) throws IllegalArgumentException {
// Verify that the input is valid.
if (!FieldVerifier.isValidName(input)) {
// If the input is not valid, throw an IllegalArgumentException back to
// the client.
throw new IllegalArgumentException(
"Name must be at least 4 characters long");
}
//RequestContextUtils.getWebApplicationContext(request);
// String serverInfo = getServletContext().getServerInfo();
// String userAgent = getThreadLocalRequest().getHeader("User-Agent");
return "Hello, " + input + "!<br><br>I am running .<br><br>It looks like you are using:<br>";
}
#Override
//#Transactional(propagation = Propagation.REQUIRED, rollbackFor = Exception.class)
public void testdao(Integer id) throws IllegalArgumentException {
// TODO Auto-generated method stub
PoiCateg X=poiCategDAO.findById(id);
PoiCateg z=poiCategDAO.findById(id);
}
}
And applicaationContext2.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<context:annotation-config />
<tx:annotation-driven transaction-manager="transactionManager" />
<context:component-scan base-package="ne.projl.*" />
<!-- <context:component-scan base-package="FULLY QUALIFIED" /> -->
<bean class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean" id="entityManagerFactory">
<property name="persistenceUnitName" value="MyPUnit" />
</bean>
<bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
</beans>
Please note that if i put context:component-scan in applicationContext.xml ( not applicatinContext2.xml my service bean is detected. ). If there's other info i should provide do tell.

Answer 1

If I remember correctly, base package in component scan only requires a package name. Then all underlying sub-package will be included.
Therefore the correct setting should be
<context:component-scan base-package="ne.projl" />

Answer 2

There could be many reason, one common reason is you created your #Component class under wrong package.
As your context scanning config set the Class has to be under this package
<context:component-scan base-package="ne.projl.*" />

Answer 3

Posting the exception (if any) would provide more insight in to the issue for everyone here. Looks to me like a visibility problem.
If you are referencing to a component that is scanned in your applicationContext2, in one of your components that is loaded via contextConfigLocation, obviously it wont be visible.
.check this link for more info on visibility of application context
. I could not add a comment to the question..so i have posted my observations as answer.. Sorry for that

Answer 4

I am not sure but does not your web.xml says this
<!-- WEB-INF/applicationContext2.xml -->
is'nt that commented out ?
are you doing an import resource of applicationContext2 in applicationContext.xml file ?