Spring console application configured using annotations

Question

I want to create spring console application (running from command line with maven for example: mvn exec:java -Dexec.mainClass=\"package.MainClass\").

Is this application

Answer 1

I'd to figure this out for a project recently. I was building a CLI for a utility that would be run from a scheduled job and reused part of the web application code for the project. I had a problem bootstrapping all of the @Autowired dependencies, and I didn't actually need them all, so I bootstrapped the specific dependencies in the main class using the AnnotationConfigApplicationContext register(java.lang.Class...) method as follows:

@Component
public class SpringAppCLI
{

    /**
     * Service to be autowired!
     */
    @Autowired
    private SampleService sampleService;

    /**
     *
     */
    public static void main(String[] args) throws Exception {

        final AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext();

        // setup configuration
        applicationContext.register(SampleServiceConfig.class);
        applicationContext.register(SampleServiceRepository.class);
        applicationContext.register(JpaConfig.class);
        applicationContext.register(CommandLineConfig.class);
        applicationContext.register(SampleService.class);
        applicationContext.register(SpringAppCLI.class);
        // add CLI property source
        applicationContext.getEnvironment().getPropertySources()
                .addLast(new SimpleCommandLinePropertySource(args));

        // setup all the dependencies (refresh) and make them run (start)
        applicationContext.refresh();
        applicationContext.start();

        try {
            SpringAppCLI springAppCLI = applicationContext.getBean(SpringAppCLI.class);
            springAppCLI.doWhatever();
        } catch (Exception e) {
            //some handling

        } finally {
            applicationContext.close();
        }
    }
}

and here's the configuration class:

@Configuration
@ComponentScan(basePackageClasses = SolrLoadCLI.class, includeFilters = @Filter(Controller.class), useDefaultFilters = false)
class CommandLineConfig implements ApplicationContextAware {

    /**
     * 
     */
    private ApplicationContext applicationContext;

    /**
     * 
     */
    @Override
    public void setApplicationContext(ApplicationContext applicationContext)
            throws BeansException {
        this.applicationContext = applicationContext;
    }

    /**
     * 
     * @return
     */
    @Bean
    public static PropertyPlaceholderConfigurer propertyPlaceholderConfigurer() {
        PropertyPlaceholderConfigurer ppc = new PropertyPlaceholderConfigurer();
        Resource[] resourceArray = new Resource[2];
        resourceArray[0] = new ClassPathResource("/SampleService.properties");
        resourceArray[1] = new ClassPathResource("/Database.properties");
        ppc.setLocations(resourceArray);
        return ppc;
    }
}