From: Kai Moritz <kai.milan.moritz@googlemail.com>
Date: Sat, 23 May 2026 06:55:54 +0000 (+0000)
Subject: refactor: Dockerfile und manuelle Jar-Packaging-Konfiguration entfernen
X-Git-Tag: grundlagen/simple-producer--claude-5~2
X-Git-Url: http://juplo.de/gitweb/?a=commitdiff_plain;h=243b2abf8ad3dd5d2a82a8a60213935b0bec4a04;p=demos%2Fkafka%2Ftraining

refactor: Dockerfile und manuelle Jar-Packaging-Konfiguration entfernen

Seit der Umstellung auf Jib ist das Dockerfile nicht mehr nötig.
maven-dependency-plugin und maven-jar-plugin-Konfiguration (Classpath-
Manifest) waren nur für den manuellen Docker-Build-Weg erforderlich.
Jib übernimmt das Packaging vollständig; mainClass ist nun explizit
in der Jib-Konfiguration gesetzt.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---

diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index 74e66edf..00000000
--- a/Dockerfile
+++ /dev/null
@@ -1,6 +0,0 @@
-FROM eclipse-temurin:21-jre
-VOLUME /tmp
-COPY target/*.jar /opt/app.jar
-COPY target/libs /opt/libs
-ENTRYPOINT [ "java", "-jar", "/opt/app.jar" ]
-CMD [ "kafka:9092", "test", "DCKR" ]
diff --git a/build.gradle b/build.gradle
index 925d6c5b..08c622b0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -39,4 +39,5 @@ tasks.named('test') {
 jib {
 	from { image = 'eclipse-temurin:21-jre' }
 	to { image = "juplo/${project.name}:${project.version}" }
+	container { mainClass = 'de.juplo.kafka.ExampleProducer' }
 }
diff --git a/pom.xml b/pom.xml
index bfb9b6f5..c0d7e482 100644
--- a/pom.xml
+++ b/pom.xml
@@ -39,35 +39,6 @@
 
   <build>
     <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-dependency-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>copy-dependencies</id>
-            <phase>package</phase>
-            <goals>
-              <goal>copy-dependencies</goal>
-            </goals>
-            <configuration>
-              <outputDirectory>${project.build.directory}/libs</outputDirectory>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-jar-plugin</artifactId>
-        <configuration>
-          <archive>
-            <manifest>
-              <addClasspath>true</addClasspath>
-              <classpathPrefix>libs/</classpathPrefix>
-              <mainClass>de.juplo.kafka.ExampleProducer</mainClass>
-            </manifest>
-          </archive>
-        </configuration>
-      </plugin>
       <plugin>
         <groupId>pl.project13.maven</groupId>
         <artifactId>git-commit-id-plugin</artifactId>
@@ -83,6 +54,9 @@
           <to>
             <image>juplo/${project.artifactId}:${project.version}</image>
           </to>
+          <container>
+            <mainClass>de.juplo.kafka.ExampleProducer</mainClass>
+          </container>
         </configuration>
         <executions>
           <execution>