Started Spring application

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>io.github.norbipeti</groupId>
+    <artifactId>GCDC-Server</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.1.3.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <release>11</release>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-devtools</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.security</groupId>
+            <artifactId>spring-security-core</artifactId>
+            <version>5.1.6.RELEASE</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-security</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.discord4j</groupId>
+            <artifactId>discord4j-core</artifactId>
+            <version>3.0.12</version>
+        </dependency>
+
+    </dependencies>
+
+</project>

src/main/java/io/github/norbipeti/gcdc/Application.java

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+package io.github.norbipeti.gcdc;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

src/main/java/io/github/norbipeti/gcdc/model/Session.java

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+package io.github.norbipeti.gcdc.model;
+
+import discord4j.core.object.util.Snowflake;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class Session {
+	String token;
+	Snowflake channel;
+}

src/main/java/io/github/norbipeti/gcdc/service/SessionService.java

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+package io.github.norbipeti.gcdc.service;
+
+import discord4j.core.object.util.Snowflake;
+import io.github.norbipeti.gcdc.model.Session;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.support.JdbcDaoSupport;
+import org.springframework.stereotype.Repository;
+
+import javax.annotation.PostConstruct;
+import javax.sql.DataSource;
+import java.util.List;
+import java.util.Map;
+
+@Repository
+public class SessionService extends JdbcDaoSupport {
+
+	@Autowired
+	DataSource dataSource;
+
+	@PostConstruct
+	private void initialize() {
+		setDataSource(dataSource);
+	}
+
+	public void insertSession(Session session) {
+		String sql = "INSERT INTO sessions(token, channel) VALUES (?, ?)";
+		getJdbcTemplate().update(sql, session.getToken(), session.getChannel().asLong());
+	}
+
+	public Session getSession(String token) {
+		String sql = "SELECT * FROM sessions WHERE token=? LIMIT 1";
+		List<Map<String, Object>> rows = getJdbcTemplate().queryForList(sql, token);
+
+		if (rows.size() == 0) return null;
+
+		var row = rows.get(0);
+		return new Session((String) row.get("token"), Snowflake.of((long) row.get("channel")));
+	}
+
+	public void deleteSession(String token) {
+		String sql = "DELETE FROM sessions WHERE token=?";
+		getJdbcTemplate().update(sql, token);
+
+	}
+
+	public void updateSession(Session session) {
+		String sql = "UPDATE sessions SET channel=? WHERE token=?";
+		getJdbcTemplate().update(sql, session.getChannel().asLong(), session.getToken());
+	}
+
+}