Where to put the bean logic creation into a simple Spring Boot application?

Question

it is pretty long time that I am not using Java technologies and I have some doubt if this could be a good solution to structure a Spring Boot application.

I am developing a batch application using Spring Batch into a Spring Boot application (just to explain the general context, my question should be strictly related to the Spring Boot project structure).

Basically I have this UpdateInfoBatchApplication that is the "main" classs starting my application:

@SpringBootApplication
@EnableBatchProcessing
@EnableScheduling
public class UpdateInfoBatchApplication {
    
    @Bean
    RestTemplate restTemplate() throws KeyManagementException, UnrecoverableKeyException, NoSuchAlgorithmException, KeyStoreException, CertificateException, IOException {
        final String password = "MY_PSWD";
        final String pfxPath = "/home/andrea/Documents/workspace-spring-tool-suite-4-4.11.0.RELEASE/UpdateInfoBatch/target/classes/static/certificate.pfx";
        
        HttpComponentsClientHttpRequestFactory httpComponentsClientHttpRequestFactory = getHttpComponentsClientHttpRequestFactory(pfxPath,password);
        
        RestTemplate restTemplate = new RestTemplate(httpComponentsClientHttpRequestFactory);
        
        return restTemplate;
        
    }
    
    

    public static void main(String[] args) {
        SpringApplication.run(UpdateInfoBatchApplication.class, args);
    }
    
    
    private static HttpComponentsClientHttpRequestFactory getHttpComponentsClientHttpRequestFactory(String pfxPath,String password) throws KeyManagementException, UnrecoverableKeyException, NoSuchAlgorithmException, KeyStoreException, CertificateException, IOException {
        TrustStrategy acceptingTrustStrategy = (X509Certificate[] chain, String authType) -> true;

        SSLContext sslContext = SSLContextBuilder
                .create().loadKeyMaterial(new File(pfxPath),password.toCharArray(), password.toCharArray()).loadTrustMaterial(null, acceptingTrustStrategy).build();

        HttpClient client = HttpClients.custom().setSSLContext(sslContext).build();

        HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();

        requestFactory.setHttpClient(client);
        
        return requestFactory;
    }

}

Basically this class contains the main method starting my Spring Boot application.

It also contain a restTemplate method annotated with @Bean annotation. It creates and return a custom RestTemplate object (it is created calling the getHttpComponentsClientHttpRequestFactory that itself return a HttpComponentsClientHttpRequestFactory instance on which it is set an SSL client certificate needed to perform some APIs call).

It works fine but I am not sure that this UpdateInfoBatchApplication class is a good place where to put this restTemplate bean creation logic.

What do you think about? Could be a decent solution or is it pretty dirty?

Answer 1

You should put your bean creation logic under a class called "BeanConfig" or sth. I mostly group them according to context they have like putting password encoder bean in SecurityBeanConfig etc. Do not forget to annotate your class

@Configuration