Spring Integration or Apache HTTP Client

Question

I have a spring application which requires to call REST based external API calls for some data.

The data format from the API is JSON.

My question is which one of the following options is better and light weight to make the external api calls

1. Spring integration (using ws:outbound-gateway)

2. Apache Commons HttpClient

Please share your thoughts...

Answer 1

As the others have mentioned both Spring RestTemplate and Jersey Rest Client will do the job. I have used both. Both them work great with Jackson and IIRC they will automatically use it if found (spring for sure).

There is one advantage I like about Spring RestTemplate is that you can plugin Commons HTTP as the transport. So if you had some weird headers, cookies, timeout, threading you can configure Commons HTTP and then put it into the RestTemplate.

RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJacksonHttpMessageConverter());
restTemplate.setErrorHandler(new DefaultResponseErrorHandler());
CommonsClientHttpRequestFactory f = new CommonsClientHttpRequestFactory();
f.setReadTimeout(120 * 1000);

The point is if you are thinking about using Commons HTTP Client then as @Skaffman says RestTemplate is a no-brainer over something more complicated!