spring boot - load context xml outside classpath and listeners - spring-boot

Question

I am converting my camel spring application to use spring boot latest version 1.4.0.
My application context xml is outside my WAR , to add flexibility. But I am unable to get it loaded in the project. If I add it inside my project classpath and use #ImportResource it works fine. How do i Get it loaded from outside.
My web.xml (old one)
<?xml version="1.0"?>
<!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>Archetype Created Web Application</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>file:///${camel.config.location}</param-value>
<description> location of spring xml files</description>
</context-param>
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>file:///${log4j.config.location}</param-value>
</context-param>
<context-param>
<param-name>log4jRefreshInterval</param-name>
<param-value>10000</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
</web-app>
I have implemented the below application class after searching thru a example but the context.xml is not loaded . I have added it as a resource Loader. I used onStartup too but still noting gets loaded only spring boot loads up.
#Configuration
#EnableAutoConfiguration(exclude = { DataSourceAutoConfiguration.class,
DataSourceTransactionManagerAutoConfiguration.class, HibernateJpaAutoConfiguration.class })
#ComponentScan
public class DLBootApplication extends SpringBootServletInitializer {
public static void main(String[] args) throws Exception {
final ConfigurableEnvironment environment = new StandardServletEnvironment();
initialize(environment);
final ResourceLoader resourceLoader = createResourceLoader();
final ApplicationContext ctx = new SpringApplicationBuilder(DLBootApplication.class)
.contextClass(AnnotationConfigEmbeddedWebApplicationContext.class).environment(environment)
.resourceLoader(resourceLoader).run(args);
}
public static void initialize(ConfigurableEnvironment environment) {
final String camelConfig = environment.getProperty(Constants.DL_CAMEL_CONFIG_LOCATION);
final String log4jConfig = environment.getProperty(Constants.DL_LOG4J_CONFIG_LOCATION);
if (StringUtils.isEmpty(camelConfig)) {
throw new IllegalStateException(Constants.DL_CAMEL_CONFIG_LOCATION + " is empty");
}
if (StringUtils.isEmpty(log4jConfig)) {
throw new IllegalStateException(Constants.DL_LOG4J_CONFIG_LOCATION + " is empty");
}
System.setProperty(Constants.DL_CAMEL_CONFIG_LOCATION, camelConfig);
System.setProperty(Constants.DL_LOG4J_CONFIG_LOCATION, log4jConfig);
}
public static ResourceLoader createResourceLoader() {
final FileSystemResourceLoader resLoader = new FileSystemResourceLoader();
resLoader.getResource(System.getProperty(Constants.DL_CAMEL_CONFIG_LOCATION));
return resLoader;
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
final ConfigurableEnvironment environment = new StandardServletEnvironment();
initialize(environment);
final ResourceLoader resourceLoader = createResourceLoader();
return application.sources(DLBootApplication.class).environment(environment).resourceLoader(resourceLoader);
}
#Override
public void onStartup(ServletContext servletContext) throws ServletException {
// Create the 'root' Spring application context
final AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
rootContext.register(DLBootApplication.class);
// Manage the lifecycle of the root application context
servletContext.addListener(new ContextLoaderListener(rootContext));
servletContext.addListener(new Log4jConfigListener());
}
}

Answer 1

got it working using #Importresorce and the file location from a environment variable.