ClickHouse Managed Postgres와 Spring Boot 함께 사용하기

spring.application.name=todos
server.port=3113

spring.datasource.url=jdbc:postgresql://your-instance.pg.clickhouse.cloud:5432/guide_spring?sslmode=verify-full&sslrootcert=ca-certificate.pem
spring.datasource.username=postgres
spring.datasource.password=${DATABASE_PASSWORD}

spring.jpa.hibernate.ddl-auto=validate
spring.jpa.open-in-view=false

CREATE TABLE todos (
    id         bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    title      text        NOT NULL,
    done       boolean     NOT NULL DEFAULT false,
    created_at timestamptz NOT NULL DEFAULT now()
);

package com.example.todos;

import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import jakarta.persistence.Table;
import java.time.Instant;

@Entity
@Table(name = "todos")
public class Todo {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String title;

    private boolean done;

    private Instant createdAt = Instant.now();

    protected Todo() {
    }

    public Todo(String title) {
        this.title = title;
    }

    public Long getId() {
        return id;
    }

    public String getTitle() {
        return title;
    }

    public boolean isDone() {
        return done;
    }

    public void setDone(boolean done) {
        this.done = done;
    }

    public Instant getCreatedAt() {
        return createdAt;
    }
}

package com.example.todos;

import org.springframework.data.jpa.repository.JpaRepository;

public interface TodoRepository extends JpaRepository<Todo, Long> {
}

package com.example.todos;

import java.util.List;
import org.springframework.data.domain.Sort;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PatchMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.server.ResponseStatusException;

@RestController
@RequestMapping("/todos")
public class TodoController {

    record NewTodo(String title) {
    }

    private final TodoRepository todos;

    public TodoController(TodoRepository todos) {
        this.todos = todos;
    }

    // Read
    @GetMapping
    public List<Todo> list() {
        return todos.findAll(Sort.by("id"));
    }

    // Create
    @PostMapping
    @ResponseStatus(HttpStatus.CREATED)
    public Todo create(@RequestBody NewTodo body) {
        return todos.save(new Todo(body.title()));
    }

    // Update: toggle the done flag
    @PatchMapping("/{id}")
    public Todo toggle(@PathVariable Long id) {
        Todo todo = todos.findById(id)
                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
        todo.setDone(!todo.isDone());
        return todos.save(todo);
    }

    // Delete
    @DeleteMapping("/{id}")
    @ResponseStatus(HttpStatus.NO_CONTENT)
    public void delete(@PathVariable Long id) {
        todos.deleteById(id);
    }
}

spring.datasource.url=jdbc:postgresql://your-instance.pg.clickhouse.cloud:6432/guide_spring?sslmode=verify-full&sslrootcert=ca-certificate.pem
spring.flyway.url=jdbc:postgresql://your-instance.pg.clickhouse.cloud:5432/guide_spring?sslmode=verify-full&sslrootcert=ca-certificate.pem
spring.flyway.user=postgres
spring.flyway.password=${DATABASE_PASSWORD}