Update to Java 21

Dockerfile

@@ -1,11 +1,11 @@
-FROM maven:3-eclipse-temurin-17 as builder
+FROM maven:3-eclipse-temurin-21 AS builder
 
 WORKDIR /usr/src/bot
 COPY src src
 COPY pom.xml pom.xml
 RUN mvn clean package
 
-FROM eclipse-temurin:17-alpine
+FROM eclipse-temurin:21-alpine
 
 ENV RUN_IN_DOCKER true
 ENV DISCORD_TOKEN MY_TOKEN

pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.fuchss</groupId>
         <artifactId>maven-parent</artifactId>
-        <version>0.11.0</version>
+        <version>0.21.0</version>
     </parent>
 
     <artifactId>deltabot</artifactId>

src/main/kotlin/org/fuchss/deltabot/cognitive/Requests.kt

@@ -3,7 +3,7 @@ package org.fuchss.deltabot.cognitive
 import java.io.DataOutputStream
 import java.io.InputStream
 import java.net.HttpURLConnection
-import java.net.URL
+import java.net.URI
 import java.nio.charset.Charset
 import java.nio.charset.StandardCharsets
 
@@ -17,7 +17,7 @@ fun get(
     url: String,
     timeoutInMS: Int? = null
 ): String {
-    val endpoint = URL(url)
+    val endpoint = URI(url).toURL()
     val urlConnection: HttpURLConnection = endpoint.openConnection() as HttpURLConnection
     if (timeoutInMS != null) {
         urlConnection.connectTimeout = timeoutInMS
@@ -54,7 +54,7 @@ fun post(
     contentType: String,
     postData: ByteArray
 ): String {
-    val endpoint = URL(url)
+    val endpoint = URI(url).toURL()
     val urlConnection: HttpURLConnection = endpoint.openConnection() as HttpURLConnection
     urlConnection.requestMethod = "POST"
     urlConnection.useCaches = false

src/main/kotlin/org/fuchss/deltabot/db/dto/UserDTO.kt

@@ -54,7 +54,7 @@ class UserDTO {
         session: Session?,
         user: User
     ) {
-        readableName = "${user.name}#${user.discriminator}"
+        readableName = "${user.name}#${user.id}"
         session?.persist(this)
     }