replace log4j2 with logback

server/build.gradle.kts

@@ -11,8 +11,10 @@ val bots = project(":bots").subprojects
 dependencies {
     implementation(project(":bot-api"))
     implementation(project(":management"))
-    implementation(libs.bundles.log4j2)
     implementation(libs.bundles.jackson)
+    implementation(libs.slf4j)
+
+    runtimeOnly(libs.logback)
 
     bots.forEach {
         implementation(project(it.path))

server/src/main/java/eu/jonahbauer/chat/server/Config.java

@@ -4,6 +4,7 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import eu.jonahbauer.chat.bot.config.BotConfig;
 import eu.jonahbauer.chat.server.bot.BotConfigDeserializer;
+import lombok.extern.slf4j.Slf4j;
 import org.jetbrains.annotations.NotNull;
 
 import java.io.IOException;
@@ -13,6 +14,7 @@ import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
 
+@Slf4j
 public record Config(
         @NotNull Account account,
         @NotNull Set<@NotNull String> channels,
@@ -40,6 +42,8 @@ public record Config(
     public static @NotNull Config read(@NotNull URL url) throws IOException {
         var mapper = new ObjectMapper();
         return mapper.readValue(url, Config.class);
+        log.info("Loading configuration from " + url);
+
     }
 
     public Config {

server/src/main/java/eu/jonahbauer/chat/server/bot/ChatBotSupervisor.java

@@ -10,7 +10,7 @@ import eu.jonahbauer.chat.server.management.impl.ChatBotManager;
 import eu.jonahbauer.chat.server.management.impl.ChatBotSupport;
 import eu.jonahbauer.chat.server.socket.SocketSupervisor;
 import eu.jonahbauer.chat.server.util.Lazy;
-import lombok.extern.log4j.Log4j2;
+import lombok.extern.slf4j.Slf4j;
 import org.jetbrains.annotations.Blocking;
 import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NonBlocking;
@@ -27,7 +27,7 @@ import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.locks.ReentrantLock;
 
-@Log4j2
+@Slf4j
 public final class ChatBotSupervisor implements AutoCloseable {
     private static final Duration POST_EXPIRATION = Duration.ofSeconds(2);
     private static final int MESSAGE_QUEUE_SIZE = 10;

server/src/main/java/eu/jonahbauer/chat/server/management/impl/AdvancedMBean.java

@@ -4,7 +4,7 @@ import eu.jonahbauer.chat.server.management.annotations.ManagedAttribute;
 import eu.jonahbauer.chat.server.management.annotations.ManagedBean;
 import eu.jonahbauer.chat.server.management.annotations.ManagedOperation;
 import eu.jonahbauer.chat.server.management.annotations.ManagedParameter;
-import lombok.extern.log4j.Log4j2;
+import lombok.extern.slf4j.Slf4j;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -16,7 +16,7 @@ import java.util.List;
 import java.util.Locale;
 import java.util.function.Function;
 
-@Log4j2
+@Slf4j
 class AdvancedMBean extends StandardMBean {
     public AdvancedMBean(@NotNull Object implementation) {
         super(implementation, null, true);

server/src/main/java/eu/jonahbauer/chat/server/management/impl/ChatBotSupport.java

@@ -5,14 +5,14 @@ import eu.jonahbauer.chat.server.bot.ChatBotSupervisor;
 import eu.jonahbauer.chat.server.management.BotConfigSupport;
 import eu.jonahbauer.chat.server.management.ChatBotSupportMXBean;
 import lombok.Getter;
-import lombok.extern.log4j.Log4j2;
+import lombok.extern.slf4j.Slf4j;
 import org.jetbrains.annotations.NotNull;
 
 import java.lang.management.ManagementFactory;
 import java.util.Objects;
 
 @Getter
-@Log4j2
+@Slf4j
 public final class ChatBotSupport implements ChatBotSupportMXBean {
     private final @NotNull ChatBotSupervisor supervisor;
     private final @NotNull String name;

server/src/main/java/eu/jonahbauer/chat/server/management/impl/SocketSupport.java

@@ -4,7 +4,7 @@ import eu.jonahbauer.chat.server.management.SocketState;
 import eu.jonahbauer.chat.server.management.SocketSupportMXBean;
 import eu.jonahbauer.chat.server.socket.SocketSupervisor;
 import lombok.Getter;
-import lombok.extern.log4j.Log4j2;
+import lombok.extern.slf4j.Slf4j;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -12,7 +12,7 @@ import java.lang.management.ManagementFactory;
 import java.util.Date;
 import java.util.Objects;
 
-@Log4j2
+@Slf4j
 @Getter
 public final class SocketSupport implements SocketSupportMXBean {
     private final @NotNull SocketSupervisor supervisor;

server/src/main/java/eu/jonahbauer/chat/server/socket/SocketSupervisor.java

@@ -12,8 +12,7 @@ import eu.jonahbauer.chat.server.management.impl.SocketManager;
 import eu.jonahbauer.chat.server.management.impl.SocketSupport;
 import eu.jonahbauer.chat.server.util.Lazy;
 import lombok.SneakyThrows;
-import lombok.extern.log4j.Log4j2;
-import org.apache.logging.log4j.Level;
+import lombok.extern.slf4j.Slf4j;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -34,7 +33,7 @@ import java.util.concurrent.locks.ReentrantLock;
 
 import static eu.jonahbauer.chat.server.util.UrlTemplateProcessor.URL;
 
-@Log4j2
+@Slf4j
 public final class SocketSupervisor implements Chat, AutoCloseable {
     private static final URI AUTH_SERVER = URI.create("https://chat.qed-verein.de/rubychat/account");
     private static final String ORIGIN = "https://chat.qed-verein.de";
@@ -449,8 +448,11 @@ public final class SocketSupervisor implements Chat, AutoCloseable {
                 try {
                     var message = MAPPER.readValue(text, Message.class);
 
-                    var level = message instanceof Message.Post || message instanceof Message.Ack ? Level.INFO : Level.DEBUG;
-                    log.log(level, "Received message: {}", message);
+                if (message instanceof Message.Post) {
+                    log.info("Received message: {}", message);
+                } else {
+                    log.debug("Received message: {}", message);
+                }
 
                     if (message instanceof Message.Post post) {
                         delay = post.id() + 1;

server/src/main/java/module-info.java

@@ -10,8 +10,8 @@ module eu.jonahbauer.chat.server {
     requires eu.jonahbauer.chat.server.management;
     requires java.management;
     requires java.net.http;
-    requires org.apache.logging.log4j;
     requires org.jetbrains.annotations;
+    requires org.slf4j;
 
     requires static lombok;
 }

server/src/main/resources/log4j2.xml

@@ -1,12 +0,0 @@
-<Configuration>
-    <Appenders>
-        <Console name="console" target="SYSTEM_OUT">
-            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %highlight{%-5level} [%15.15t] %style{%c{1}}{cyan} : %msg%n" />
-        </Console>
-    </Appenders>
-    <Loggers>
-        <Root level="info" additivity="false">
-            <AppenderRef ref="console" />
-        </Root>
-    </Loggers>
-</Configuration>

server/src/main/resources/logback.xml

@@ -0,0 +1,11 @@
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %highlight(%-5level) [%15.15t] %cyan(%c{1}) : %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="info">
+        <appender-ref ref="STDOUT"/>
+    </root>
+</configuration>