Einheitliche Benennung des Consumers -- MOVE

diff --git a/src/main/java/de/juplo/kafka/ExampleConsumer.java b/src/main/java/de/juplo/kafka/ExampleConsumer.java
new file mode 100644 (file)
index 0000000..cee2165
--- /dev/null
+++ b/src/main/java/de/juplo/kafka/ExampleConsumer.java
@@ -0,0 +1,137 @@
+package de.juplo.kafka;
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.apache.kafka.clients.consumer.ConsumerRecords;
+import org.apache.kafka.clients.consumer.Consumer;
+import org.apache.kafka.clients.consumer.KafkaConsumer;
+import org.apache.kafka.common.errors.WakeupException;
+import org.apache.kafka.common.serialization.StringDeserializer;
+
+import java.time.Duration;
+import java.util.Arrays;
+import java.util.Properties;
+
+
+@Slf4j
+public class SimpleConsumer
+{
+  private final String id;
+  private final String topic;
+  private final Consumer<String, String> consumer;
+
+  private volatile boolean running = false;
+  private long consumed = 0;
+
+  public SimpleConsumer(String broker, String topic, String groupId, String clientId)
+  {
+    Properties props = new Properties();
+    props.put("bootstrap.servers", broker);
+    props.put("group.id", groupId); // ID für die Offset-Commits
+    props.put("client.id", clientId); // Nur zur Wiedererkennung
+    props.put("auto.offset.reset", "earliest"); // Von Beginn an lesen
+    props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
+    props.put("key.deserializer", StringDeserializer.class.getName());
+    props.put("value.deserializer", StringDeserializer.class.getName());
+
+    this.id = clientId;
+    this.topic = topic;
+    consumer = new KafkaConsumer<>(props);
+  }
+
+
+  public void run()
+  {
+    try
+    {
+      log.info("{} - Subscribing to topic {}", id, topic);
+      consumer.subscribe(Arrays.asList(topic));
+      running = true;
+
+      while (true)
+      {
+        ConsumerRecords<String, String> records =
+            consumer.poll(Duration.ofSeconds(1));
+
+        log.info("{} - Received {} messages", id, records.count());
+        for (ConsumerRecord<String, String> record : records)
+        {
+          consumed++;
+          log.info(
+              "{} - {}: {}/{} - {}={}",
+              id,
+              record.offset(),
+              record.topic(),
+              record.partition(),
+              record.key(),
+              record.value()
+          );
+        }
+      }
+    }
+    catch(WakeupException e)
+    {
+      log.info("{} - Consumer was signaled to finish its work", id);
+    }
+    catch(Exception e)
+    {
+      log.error("{} - Unexpected error: {}, unsubscribing!", id, e.toString());
+      consumer.unsubscribe();
+    }
+    finally
+    {
+      running = false;
+      log.info("{} - Closing the KafkaConsumer", id);
+      consumer.close();
+      log.info("{}: Consumed {} messages in total, exiting!", id, consumed);
+    }
+  }
+
+
+  public static void main(String[] args) throws Exception
+  {
+    String broker = ":9092";
+    String topic = "test";
+    String groupId = "my-group";
+    String clientId = "DEV";
+
+    switch (args.length)
+    {
+      case 4:
+        clientId = args[3];
+      case 3:
+        groupId = args[2];
+      case 2:
+        topic = args[1];
+      case 1:
+        broker = args[0];
+    }
+
+
+    SimpleConsumer instance = new SimpleConsumer(broker, topic, groupId, clientId);
+
+    Runtime.getRuntime().addShutdownHook(new Thread(() ->
+    {
+      instance.consumer.wakeup();
+
+      while (instance.running)
+      {
+        log.info("Waiting for main-thread...");
+        try
+        {
+          Thread.sleep(1000);
+        }
+        catch (InterruptedException e) {}
+      }
+      log.info("Shutdown completed.");
+    }));
+
+    log.info(
+        "Running SimpleConsumer: broker={}, topic={}, group-id={}, client-id={}",
+        broker,
+        topic,
+        groupId,
+        clientId);
+    instance.run();
+  }
+}

diff --git a/src/main/java/de/juplo/kafka/SimpleConsumer.java b/src/main/java/de/juplo/kafka/SimpleConsumer.java
deleted file mode 100644 (file)
index cee2165..0000000
--- a/src/main/java/de/juplo/kafka/SimpleConsumer.java
+++ /dev/null
@@ -1,137 +0,0 @@
-package de.juplo.kafka;
-
-import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.consumer.ConsumerRecord;
-import org.apache.kafka.clients.consumer.ConsumerRecords;
-import org.apache.kafka.clients.consumer.Consumer;
-import org.apache.kafka.clients.consumer.KafkaConsumer;
-import org.apache.kafka.common.errors.WakeupException;
-import org.apache.kafka.common.serialization.StringDeserializer;
-
-import java.time.Duration;
-import java.util.Arrays;
-import java.util.Properties;
-
-
-@Slf4j
-public class SimpleConsumer
-{
-  private final String id;
-  private final String topic;
-  private final Consumer<String, String> consumer;
-
-  private volatile boolean running = false;
-  private long consumed = 0;
-
-  public SimpleConsumer(String broker, String topic, String groupId, String clientId)
-  {
-    Properties props = new Properties();
-    props.put("bootstrap.servers", broker);
-    props.put("group.id", groupId); // ID für die Offset-Commits
-    props.put("client.id", clientId); // Nur zur Wiedererkennung
-    props.put("auto.offset.reset", "earliest"); // Von Beginn an lesen
-    props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
-    props.put("key.deserializer", StringDeserializer.class.getName());
-    props.put("value.deserializer", StringDeserializer.class.getName());
-
-    this.id = clientId;
-    this.topic = topic;
-    consumer = new KafkaConsumer<>(props);
-  }
-
-
-  public void run()
-  {
-    try
-    {
-      log.info("{} - Subscribing to topic {}", id, topic);
-      consumer.subscribe(Arrays.asList(topic));
-      running = true;
-
-      while (true)
-      {
-        ConsumerRecords<String, String> records =
-            consumer.poll(Duration.ofSeconds(1));
-
-        log.info("{} - Received {} messages", id, records.count());
-        for (ConsumerRecord<String, String> record : records)
-        {
-          consumed++;
-          log.info(
-              "{} - {}: {}/{} - {}={}",
-              id,
-              record.offset(),
-              record.topic(),
-              record.partition(),
-              record.key(),
-              record.value()
-          );
-        }
-      }
-    }
-    catch(WakeupException e)
-    {
-      log.info("{} - Consumer was signaled to finish its work", id);
-    }
-    catch(Exception e)
-    {
-      log.error("{} - Unexpected error: {}, unsubscribing!", id, e.toString());
-      consumer.unsubscribe();
-    }
-    finally
-    {
-      running = false;
-      log.info("{} - Closing the KafkaConsumer", id);
-      consumer.close();
-      log.info("{}: Consumed {} messages in total, exiting!", id, consumed);
-    }
-  }
-
-
-  public static void main(String[] args) throws Exception
-  {
-    String broker = ":9092";
-    String topic = "test";
-    String groupId = "my-group";
-    String clientId = "DEV";
-
-    switch (args.length)
-    {
-      case 4:
-        clientId = args[3];
-      case 3:
-        groupId = args[2];
-      case 2:
-        topic = args[1];
-      case 1:
-        broker = args[0];
-    }
-
-
-    SimpleConsumer instance = new SimpleConsumer(broker, topic, groupId, clientId);
-
-    Runtime.getRuntime().addShutdownHook(new Thread(() ->
-    {
-      instance.consumer.wakeup();
-
-      while (instance.running)
-      {
-        log.info("Waiting for main-thread...");
-        try
-        {
-          Thread.sleep(1000);
-        }
-        catch (InterruptedException e) {}
-      }
-      log.info("Shutdown completed.");
-    }));
-
-    log.info(
-        "Running SimpleConsumer: broker={}, topic={}, group-id={}, client-id={}",
-        broker,
-        topic,
-        groupId,
-        clientId);
-    instance.run();
-  }
-}