[JAVA] Spring Boot, Doma2, Gradle initial setting summary

At the beginning

When developing with Eclipse, I'm always addicted to the initial settings of Spring Boot + Doma2 + Gradle, so I will summarize it for myself.

environment

• IDE：Eclipse pleiades-2020-03
• Spring Boot：2.3.1 RELEASE
• Doma：2.35.0

Setup steps

(Optional) Create an application template with Spring Initializer

Add a dependency on Doma2

build.gradle

dependencies {
  // ...abridgement
  implementation 'org.seasar.doma.boot:doma-spring-boot-starter:1.4.0'
  annotationProcessor 'org.seasar.doma:doma-processor:2.35.0'
}

Set up Eclipse

Add plugins for Eclipse settings to plugins in build.gradle.

build.gradle

plugins {
  // ...abridgement
  id 'com.diffplug.eclipse.apt' version '3.23.0'
}

Execute gradle eclipse to reflect the settings.

$ ./gradlew eclipse
Starting a Gradle Daemon (subsequent builds will be faster)

BUILD SUCCESSFUL in 16s
5 actionable tasks: 5 executed

You can confirm that the Eclipse settings (annotation processing) have been completed.

Create a simple API

Follow the README of https://github.com/domaframework/doma-spring-boot/tree/1.4.0 And basically create it.

Define Entity

Reservation.java

package com.example.demo;

import org.seasar.doma.Entity;

import lombok.Data;

@Data
@Entity
public class Reservation {

	private Integer id;

	private String name;
}

Define Dao Interface

ReservationDao.java

package com.example.demo;

import java.util.List;

import org.seasar.doma.Dao;
import org.seasar.doma.Insert;
import org.seasar.doma.Select;
import org.seasar.doma.boot.ConfigAutowireable;
import org.springframework.transaction.annotation.Transactional;

@ConfigAutowireable
@Dao
public interface ReservationDao {

	@Select
	public List<Reservation> selectAll();

	@Insert
	@Transactional
	public int insert(Reservation reservation);
}

Hover over ReservationDao # selectAll and right click> Doma> Jump to Sql File to generate an empty SQL file. (If you have added the Doma Tools plugin to Eclipse)

• If DOMA4019 occurs, refer to [(Supplement) When DOMA4019 error occurs](# DOMA4019 error occurs).

Write a query in a SQL file

selectAll.sql

SELECT
  id,
  name
FROM reservation
ORDER BY name ASC

Define Service and Controller classes

ReservationService.java

package com.example.demo;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class ReservationService {

	@Autowired
	private ReservationDao reservationDao;

	public List<Reservation> selectAll() {
		return reservationDao.selectAll();
	}

	public int insert(Reservation reservation) {
		return reservationDao.insert(reservation);
	}
}

ReservationController.java

package com.example.demo;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class ReservationController {

	@Autowired
	private ReservationService reservationService;

	@GetMapping(path = "/")
	public List<Reservation> selectAll() {
		return reservationService.selectAll();
	}

	@PostMapping(path = "/")
	public int insert(@RequestBody Reservation reservation) {
		return reservationService.insert(reservation);
	}

}

Create a Reservation table at startup

We use a Java in-memory DB called HSQLDB. If you place schema.sql directly under src / main / resources, you can run the table creation script at startup.

schema.sql

CREATE TABLE reservation (
  id   IDENTITY,
  NAME VARCHAR(50)
);

API operation check

POST (registration)

POST http://localhost:8080 HTTP/1.1
Content-Type: application/json

{
  "id": 1,
  "name": "Sample A"
}

response;

HTTP/1.1 200 
Content-Type: application/json
Transfer-Encoding: chunked
Date: Sun, 12 Jul 2020 15:09:30 GMT
Connection: close

1

GET (Get all)

GET http://localhost:8080 HTTP/1.1

response;

HTTP/1.1 200 
Content-Type: application/json
Transfer-Encoding: chunked
Date: Sun, 12 Jul 2020 15:10:20 GMT
Connection: close

[
  {
    "id": 1,
    "name": "Sample A"
  }
]

(Supplement) When a DOMA4019 error occurs

If you get a DOMA4019 error that the absolute path of the SQL file is not what you expected, as shown below.

[DOMA4019] The file "META-INF/com/example/demo/ReservationDao/selectAll.sql" is not found in the classpath. The absolute path is "C:\Git\springboot-doma2-sample\bin\main\META-INF\com\example\demo\ReservationDao\selectAll.sql".

Right-click> Properties> Modify Java build path on the target project.

Project default output folder ⇒ Modified to a specific output folder (bin / main).

At the end

The created application is stored in Repository. See if you want to see the full amount of build.gradle.

reference

• https://doma.readthedocs.io/en/2.35.0/getting-started-eclipse/
• https://doma.readthedocs.io/en/2.35.0/build/#build-with-eclipse
• https://github.com/domaframework/doma-spring-boot/tree/1.4.0