Eclipse not recognizing slf4j or logback Logger class methods - eclipse

Question

I have recently been tasked to begin architecting a new Spring 3 MVC project (I am quite the noob in this regard). Having set up most of the POC project in Kepler, I have:
a prototype webapp (HelloWorld style) that is deployable and
working in (an external) Tomcat7.
Logback configured and reporting to the console:
...
12:46:21.916 [http-apr-8080-exec-5] TRACE o.s.w.s.v.InternalResourceViewResolver - Cached view [home]
12:46:21.916 [http-apr-8080-exec-5] DEBUG o.s.web.servlet.DispatcherServlet - Rendering view [org.springframework.web.servlet.view.JstlView: name 'home'; URL [/WEB-INF/view/home.jsp]] in DispatcherServlet with name 'sample'
12:46:21.916 [http-apr-8080-exec-5] TRACE o.s.web.servlet.view.JstlView - Rendering view with name 'home' with model {name=lingxotika.org} and static attributes {}
12:46:21.916 [http-apr-8080-exec-5] DEBUG o.s.web.servlet.view.JstlView - Added model object 'name' of type [java.lang.String] to request in view with name 'home'
12:46:21.921 [http-apr-8080-exec-5] DEBUG o.s.web.servlet.view.JstlView - Forwarding to resource [/WEB-INF/view/home.jsp] in InternalResourceView 'home'
12:46:21.957 [http-apr-8080-exec-5] TRACE o.s.web.servlet.DispatcherServlet - Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade#1bb3db1b
12:46:21.960 [http-apr-8080-exec-5] DEBUG o.s.web.servlet.DispatcherServlet - Successfully completed request
12:46:21.960 [http-apr-8080-exec-5] TRACE o.s.w.c.s.AnnotationConfigWebApplicationContext - Publishing event in WebApplicationContext for namespace 'sample-servlet': ServletRequestHandledEvent: url=[/codetutr/home/]; client=[127.0.0.1]; method=[GET]; servlet=[sample]; session=[0108E781644C1268FD92C11BD78888FB]; user=[null]; time=[87ms]; status=[OK]
but when I go into my code into use the Logger class methods (I've tried both
org.slf4j.Logger and ch.qos.logback.classic flavors), Eclipse
does not recognize the methods in the Logger instance:
package org.lingxotika.controller;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
#Controller
public class SampleController {
static final Logger log = LoggerFactory.getLogger(SampleController.class);
log.info("Hit Controller..."); // Error is here
#RequestMapping("home")
public String loadHomePage(Model model) {
model.addAttribute("name", "lingxotika.org");
return "home";
}
}
The Eclipse Code Assist after typing log. shows the following options (sorry, can't post screenshots yet):
new - create new object
nls - non-externalized string marker
runnable - runnable
toarray - convert collection to array
To sum, I have seen examples here and here that suggest this isn't a limitation of Spring or my admitted lack of competency with it, but an Eclipse issue that I am overlooking. I avoided posting what could be irrelevant information, but am happy to supply any further code, logs, or config examples. Any help would be appreciated.

Answer 1

Seems like you dont have the slf4j api jar in your project.
Since it is working in tomcat, perhaps tomcat is using a "provided" jar, ie: one that is part of the tomcat application.
If you are using maven, you need to have the following dependency in you pom:
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>