Move ConfigLoader

simplenotes-config/pom.xml

@@ -11,5 +11,11 @@
 
     <artifactId>simplenotes-config</artifactId>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.koin</groupId>
+            <artifactId>koin-core</artifactId>
+        </dependency>
+    </dependencies>
 
 </project>

simplenotes-config/src/main/kotlin/be/simplenotes/config/ConfigLoader.kt

@@ -0,0 +1,45 @@
+package be.simplenotes.config
+
+import java.util.*
+import java.util.concurrent.TimeUnit
+
+class ConfigLoader {
+    //region Config loading
+    private val properties: Properties = javaClass
+        .getResource("/application.properties")
+        .openStream()
+        .use {
+            Properties().apply { load(it) }
+        }
+
+    private val env = System.getenv()
+
+    private fun value(key: String): String =
+        env[key.toUpperCase().replace(".", "_")]
+            ?: properties.getProperty(key)
+            ?: error("Missing config key $key")
+    //endregion
+
+    val jwtConfig
+        get() = JwtConfig(
+            secret = value("jwt.secret"),
+            validity = value("jwt.validity").toLong(),
+            timeUnit = TimeUnit.HOURS,
+        )
+
+    val dataSourceConfig
+        get() = DataSourceConfig(
+            jdbcUrl = value("jdbcUrl"),
+            driverClassName = value("driverClassName"),
+            username = value("username"),
+            password = value("password"),
+            maximumPoolSize = value("maximumPoolSize").toInt(),
+            connectionTimeout = value("connectionTimeout").toLong()
+        )
+
+    val serverConfig
+        get() = ServerConfig(
+            host = value("host"),
+            port = value("port").toInt(),
+        )
+}

simplenotes-config/src/main/kotlin/be/simplenotes/config/ConfigModule.kt

@@ -0,0 +1,10 @@
+package be.simplenotes.config
+
+import org.koin.dsl.module
+
+val configModule = module {
+    single { ConfigLoader() }
+    single { get<ConfigLoader>().dataSourceConfig }
+    single { get<ConfigLoader>().jwtConfig }
+    single { get<ConfigLoader>().serverConfig }
+}

simplenotes-config/src/main/resources/application.properties

@@ -0,0 +1,12 @@
+host=localhost
+port=8080
+#
+jdbcUrl=jdbc:h2:./notes-db;
+driverClassName=org.h2.Driver
+username=h2
+password=
+maximumPoolSize=10
+connectionTimeout=3000
+#
+jwt.secret=PliLvfk7l4WF+cZJk66LR5Mpnh+ocbvJ2wfUCK2UCms=
+jwt.validity=24