Memo when HTTP communication with Java (OkHttp)

Purpose

-I want to communicate with an external API via HTTP from the process implemented in Java. ・ I want to pack XML in the body ・ I like something that is as easy to implement as possible.

Java HTTP client ... what should I use?

Refer to the article on the net, OkHttp(https://square.github.io/okhttp/) I used a library called.

<!-- http client -->
<dependency>
  <groupId>com.squareup.okhttp3</groupId>
  <artifactId>okhttp</artifactId>
  <version>3.7.0</version>
</dependency>

Implementation

In the example, XML is packed in the body and the API is called. Receives the XML String returned from the API and returns.

public String callSomething(String xml) throws IOException {
    return new OkHttpClient().newCall(
                new Request.Builder()
                    .url("[Communication URL]")
                    // basic authentication
                    .header("Authorization",
                            Credentials.basic(
                                    "[Basic authentication user]",
                                    "[Basic authentication password]"))
                    .post(RequestBody.create(MediaType.parse("text/xml"), xml))
                    .build()
            ).execute()
            .body()
            .string();
}

reference

Which Java HTTP client is better? https://qiita.com/alt_yamamoto/items/0d72276c80589493ceb4

Postscript (2019/08/13)

・ It is not good to make new each time ・ It is necessary to set the timeout time appropriately depending on the environment. I corrected it based on that point.

@Service
@Transactional(readOnly = true)
@RequiredArgsConstructor
public class MyService {

    private OkHttpClient client;

    @PostConstruct
    public void init() {
        OkHttpClient.Builder builder = new OkHttpClient.Builder();
        builder.connectTimeout(150, TimeUnit.SECONDS);
        builder.readTimeout(150, TimeUnit.SECONDS);
        builder.writeTimeout(150, TimeUnit.SECONDS);
        client = builder.build();
    }

    public String callSomething(String xml) throws IOException {
        try (Response res = client.newCall(
                new Request.Builder()
                    .url("[Communication URL]")
                    .header("Authorization",
                        Credentials.basic(
                            "[Basic authentication user]",
                            "[Basic authentication password]"))
                    .post(RequestBody.create(MediaType.parse("text/xml"), xml))
                .build()).execute()) {
            return res.body().string();
        }
    }
}