Switch to abstract implementation of starter (#86)

Co-authored-by: FP17639 <[email protected]>

README.md

@@ -81,7 +81,7 @@ For instance, you can start by creating a class annotated with `@Component`:
 
 ```java
 @Component
-public class MyKafkaStreams implements KafkaStreamsStarter {
+public class MyKafkaStreams extends KafkaStreamsStarter {
     @Override
     public void topology(StreamsBuilder streamsBuilder) { 
         // Your topology here
@@ -151,7 +151,7 @@ To do this, the first step is to override the `dlqTopic` method and return the n
 
 ```java
 @Component
-public class MyKafkaStreams implements KafkaStreamsStarter {
+public class MyKafkaStreams extends KafkaStreamsStarter {
     @Override
     public void topology(StreamsBuilder streamsBuilder) { //... }
     
@@ -172,7 +172,7 @@ Here is a complete example of how to do this:
 
 ```java
 @Component
-public class MyKafkaStreams implements KafkaStreamsStarter {
+public class MyKafkaStreams extends KafkaStreamsStarter {
     @Override
     public void topology(StreamsBuilder streamsBuilder) {
         KStream<String, MyAvroValue> myStream = streamsBuilder

kstreamplify-core-test/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>kstreamplify</artifactId>
         <groupId>com.michelin</groupId>
-        <version>0.1.0-SNAPSHOT</version>
+        <version>0.1.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -15,7 +15,7 @@
         <dependency>
             <groupId>com.michelin</groupId>
             <artifactId>kstreamplify-core</artifactId>
-            <version>0.1.0-SNAPSHOT</version>
+            <version>0.1.1-SNAPSHOT</version>
         </dependency>
     </dependencies>
 </project>

kstreamplify-core/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>kstreamplify</artifactId>
         <groupId>com.michelin</groupId>
-        <version>0.1.0-SNAPSHOT</version>
+        <version>0.1.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

kstreamplify-core/src/main/java/com/michelin/kstreamplify/initializer/KafkaStreamsStarter.java

@@ -8,24 +8,24 @@
 /**
  * The Kafka Streams starter interface
  */
-public interface KafkaStreamsStarter {
+public abstract class KafkaStreamsStarter {
     /**
      * Define the topology of the Kafka Streams
      * @param streamsBuilder The streams builder
      */
-    void topology(StreamsBuilder streamsBuilder);
+    public abstract void topology(StreamsBuilder streamsBuilder);
 
     /**
      * <p>Define the dead letter queue (DLQ) topic</p>
      * <p>If you don't want to use the DLQ topic, you can return {@link org.apache.commons.lang3.StringUtils#EMPTY}</p>
      *
      * @return The dead letter queue (DLQ) topic
      */
-    String dlqTopic();
+    public abstract String dlqTopic();
 
     /**
      * Define runnable code after the Kafka Streams startup
      * @param kafkaStreams The Kafka Streams instance
      */
-    default void onStart(KafkaStreams kafkaStreams) { }
+    public void onStart(KafkaStreams kafkaStreams) { }
 }

kstreamplify-spring-boot/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>kstreamplify</artifactId>
         <groupId>com.michelin</groupId>
-        <version>0.1.0-SNAPSHOT</version>
+        <version>0.1.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -34,7 +34,7 @@
         <dependency>
             <groupId>com.michelin</groupId>
             <artifactId>kstreamplify-core</artifactId>
-            <version>0.1.0-SNAPSHOT</version>
+            <version>0.1.1-SNAPSHOT</version>
         </dependency>
     </dependencies>
 </project>

pom.xml

@@ -6,7 +6,7 @@
 
 	<groupId>com.michelin</groupId>
 	<artifactId>kstreamplify</artifactId>
-	<version>0.1.0-SNAPSHOT</version>
+	<version>0.1.1-SNAPSHOT</version>
 	<name>kstreamplify</name>
 	<description>Kstreamplify is a Java library that brings new features on top of Kafka Streams.</description>
 	<url>https://github.com/michelin/kstreamplify</url>