Merge pull request #1 from javaBin/db/setup-db

Setup db

backend/app/build.gradle.kts

@@ -28,6 +28,9 @@ dependencies {
     val slf4j_version = "2.0.9"
     val kotlin_version = "1.9.20"
     val logstash_version = "7.4"
+    val flyway_version = "10.6.0"
+    val hikari_version = "5.1.0"
+    val postgres_version = "42.7.1"
 
     // Use the Kotlin JUnit 5 integration.
     testImplementation("org.jetbrains.kotlin:kotlin-test-junit5")
@@ -57,6 +60,18 @@ dependencies {
     // Kotlin Query
     implementation("org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version")
     implementation("com.github.seratch:kotliquery:1.9.0")
+
+
+    // Database
+    // https://mvnrepository.com/artifact/org.flywaydb/flyway-core - database migrations
+    implementation("org.flywaydb:flyway-core:$flyway_version")
+    implementation("org.flywaydb:flyway-database-postgresql:$flyway_version")
+
+    // https://mvnrepository.com/artifact/com.zaxxer/HikariCP - connection pooling
+    implementation("com.zaxxer:HikariCP:$hikari_version")
+    // https://mvnrepository.com/artifact/org.postgresql/postgresql - database driver
+    implementation("org.postgresql:postgresql:$postgres_version")
+
 }
 
 // Apply a specific Java toolchain to ease working on different environments.

backend/app/src/main/kotlin/backend/App.kt

@@ -18,6 +18,7 @@ fun server() = embeddedServer(factory = Netty, port = 8080) {
 }
 
 private fun Application.createServer() {
+    runMigration()
     configureAuth()
     configureRouting()
 }

backend/app/src/main/kotlin/backend/Database.kt

@@ -0,0 +1,26 @@
+package backend
+
+import com.zaxxer.hikari.HikariConfig
+import com.zaxxer.hikari.HikariDataSource
+import org.flywaydb.core.Flyway
+import org.postgresql.ds.PGSimpleDataSource
+
+fun runMigration() {
+    val dataSource = HikariDataSource(HikariConfig().apply {
+        username = "postgres"
+        password = "example"
+        dataSourceClassName = PGSimpleDataSource::class.qualifiedName
+        addDataSourceProperty("databaseName", "workshop")
+        addDataSourceProperty("serverName", "localhost")
+        addDataSourceProperty("portNumber", "5432")
+        maximumPoolSize = 10
+        minimumIdle = 1
+        idleTimeout = 10001
+        connectionTimeout = 1000
+        maxLifetime = 30001
+    })
+    Flyway
+        .configure()
+        .dataSource(dataSource)
+        .load().migrate()
+}

backend/app/src/main/resources/db/migration/V1__initial.sql

@@ -0,0 +1,30 @@
+create table users
+(
+    id         int GENERATED ALWAYS AS IDENTITY primary key,
+    first_name varchar,
+    last_name  varchar,
+    email      varchar,
+    is_admin   boolean
+);
+
+create table workshop
+(
+    id          int GENERATED ALWAYS AS IDENTITY primary key,
+    title       varchar                  not null,
+    description varchar,
+    start_time  timestamp with time zone not null,
+    end_time    timestamp with time zone not null,
+    capacity    int                      not null
+);
+
+create table workshop_registration
+(
+    id          int GENERATED ALWAYS AS IDENTITY primary key,
+    user_id     int,
+    workshop_id int,
+    state       int not null default 0,
+    created_at timestamp with time zone not null default current_timestamp,
+    updated_at timestamp with time zone not null default current_timestamp,
+    constraint fk_workshop foreign key (workshop_id) references workshop (id),
+    constraint fk_user foreign key (user_id) references users (id)
+);

docker-compose.yml

@@ -0,0 +1,15 @@
+services:
+  database:
+    container_name: database
+    image: postgres:16.0
+    restart: on-failure
+    ports:
+      - "5432:5432"
+    environment:
+      POSTGRES_PASSWORD: example
+      POSTGRES_DB: workshop
+    volumes:
+      - pgdata:/var/lib/postgres/data
+
+volumes:
+  pgdata: