quarkusを使う(inject編)

こんばんは、エキサイト株式会社の中尾です。

前回の続きです。 serviceを入れていきます。 serviceには@Singletonをつけて、@Injectで呼び出します。 ※サンプルです。

• interface

package org.my.hobby.service;

import org.my.hobby.core.Book;

public interface BookService {
    Book find(String title);
}

• impl

package org.my.hobby.service;

import javax.inject.Singleton;

import org.my.hobby.core.Book;

@Singleton
public class BookServiceImpl implements BookService {
    @Override
    public Book find(String title) {
        if (!"hobby".equals(title)) {
            return new Book("", "");
        }

        return new Book("hobby", "s-nakao");
    }
}

• model

package org.my.hobby.core;

import io.netty.util.internal.StringUtil;

public record Book(String title, String author) {
    public boolean isFind(){
        return !StringUtil.isNullOrEmpty(title);
    }

    public String message(){
        if(isFind()){
            return "";
        };
        return "not found book";
    }
}

• コントローラー

前回のコントローラーをちょっと改良します。

package org.my.hobby;

import javax.inject.Inject;
import javax.validation.ConstraintViolation;
import javax.validation.Validator;
import javax.validation.constraints.NotBlank;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import java.util.Set;
import java.util.stream.Collectors;

import org.my.hobby.core.Book;
import org.my.hobby.service.BookService;

record BookSearchRequest(
        @NotBlank(message = "Title may not be blank") String title) {
}

record BookSearchResponse(
        boolean success,
        String message,
        Book book) {
    record Book(String title, String author) {
    }
}

@Path("/book/search")
public class BookController {

    @Inject
    Validator validator;

    @Inject
    BookService bookService;

    @POST
    @Produces(MediaType.APPLICATION_JSON)
    public BookSearchResponse search(BookSearchRequest bookSearchRequest) {
        Set<ConstraintViolation<BookSearchRequest>> violations = validator.validate(bookSearchRequest);
        if (!violations.isEmpty()) {
            final String errorMessage = violations
                    .stream()
                    .map(e -> e.getMessage())
                    .collect(Collectors.joining(","));
            final BookSearchResponse.Book hobbyBook = new BookSearchResponse.Book("", "");
            return new BookSearchResponse(false, errorMessage, hobbyBook);
        }

        final Book book = bookService.find(bookSearchRequest.title());
        final BookSearchResponse.Book hobbyBook = new BookSearchResponse.Book(book.title(), book.author());
        return new BookSearchResponse(book.isFind(), book.message(), hobbyBook);
    }
}

• curlでアクセス

shogo.nakao@localhost:(App-Db-Blog-Fan) $ curl --location --request POST 'http://localhost:8080/book/search' \
--header 'Content-Type: application/json' \
--data-raw '{
        "title": "hobby"
}'

{"success":true,"message":"","book":{"title":"hobby","author":"s-nakao"}}%
shogo.nakao@localhost:(App-Db-Blog-Fan) $ curl --location --request POST 'http://localhost:8080/book/search' \
--header 'Content-Type: application/json' \
--data-raw '{
        "title": "s-nakao"
}'

{"success":false,"message":"not found book","book":{"title":"","author":""}}%
shogo.nakao@localhost:(App-Db-Blog-Fan) $ curl --location --request POST 'http://localhost:8080/book/search' \
--header 'Content-Type: application/json' \
--data-raw '{
}'

{"success":false,"message":"Title may not be blank","book":{"title":"","author":""}}%

取得できました！よかったですね！

次回、repositoryを作成します。

最後に、弊社では採用もバシバシ実施しているので興味のあるかたがいましたらご応募ください。

www.wantedly.com

Advent Calendar 2021を引き続き楽しんでいただけると嬉しいです。

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