Using RestTemplate for HTTP request timeout I am using RestTemplate to make an HTTP call to one of my service and I would like to have timeout for my HTTP Request:

public static String getResponse(final String url) {

    RestTemplate restTemplate = new RestTemplate(clientHttpRequestFactory());
    String response = restTemplate.getForObject(url, String.class);

    // return response

}

private ClientHttpRequestFactory clientHttpRequestFactory() {
    HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
    factory.setReadTimeout(2000);
    factory.setConnectTimeout(2000);
    return factory;
}   


(I came up with this after reading this.)

Is this an efficient way of using RestTemplate along with ClientHttpRequestFactory? Since with this for each call, it will make a new RestTemplate object. Earlier, I was not using any timeout for RestTemplate so I declared RestTemplate as static final.

private static final RestTemplate restTemplate = new RestTemplate();

public static String getResponse(final String url) {

    String response = restTemplate.getForObject(url, String.class);

    // return response

}


I am not sure what is the right way of using RestTemplate along with ClientHttpRequestFactory. Should they both be declared as static?
In the example you linked, RestTemplate is annotated with @Bean:


@Bean
public RestTemplate restTemplate() {
    return new RestTemplate(clientHttpRequestFactory());
}



Beans are (normally) singletons in Spring, intended for reuse. This related post also confirms that RestTemplate is thread-safe, and it would be wasteful to recreate it every time.

It would be best to configure RestTemplate as in the linked article, and inject into your setup using Spring's annotations based configuration. Or, you could make it a private final member of your class.

class RequestHandler {
    private final RestTemplate restTemplate;

    public RequestHandler() {
        restTemplate = new RestTemplate(clientHttpRequestFactory());
    }

    public RestTemplate getRestTemplate() {
        return restTemplate;
    }
}