`simple-producer` in `simple-consumer` verwandelt -- COPY

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..c12a75e
--- /dev/null
+++ b/src/main/java/de/juplo/kafka/ExampleConsumer.java
@@ -0,0 +1,157 @@
+package de.juplo.kafka;
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.kafka.clients.producer.Producer;
+import org.apache.kafka.clients.producer.KafkaProducer;
+import org.apache.kafka.clients.producer.ProducerRecord;
+import org.apache.kafka.common.serialization.StringSerializer;
+
+import java.util.Properties;
+
+
+@Slf4j
+public class ExampleProducer
+{
+  private final String id;
+  private final String topic;
+  private final Producer<String, String> producer;
+
+  private volatile boolean running = true;
+  private volatile boolean done = false;
+  private long produced = 0;
+
+  public ExampleProducer(
+    String broker,
+    String topic,
+    String clientId)
+  {
+    Properties props = new Properties();
+    props.put("bootstrap.servers", broker);
+    props.put("client.id", clientId); // Nur zur Wiedererkennung
+    props.put("key.serializer", StringSerializer.class.getName());
+    props.put("value.serializer", StringSerializer.class.getName());
+    props.put("metadata.maxage.ms", 5000);
+
+    this.id = clientId;
+    this.topic = topic;
+    producer = new KafkaProducer<>(props);
+  }
+
+  public void run()
+  {
+    long i = 0;
+
+    try
+    {
+      for (; running; i++)
+      {
+        send(Long.toString(i%10), Long.toString(i));
+        Thread.sleep(500);
+      }
+    }
+    catch (Exception e)
+    {
+      log.error("{} - Unexpected error: {}!", id, e.toString());
+    }
+    finally
+    {
+      log.info("{}: Closing the KafkaProducer", id);
+      producer.close();
+      log.info("{}: Produced {} messages in total, exiting!", id, produced);
+      done = true;
+    }
+  }
+
+  void send(String key, String value)
+  {
+    final long time = System.currentTimeMillis();
+
+    final ProducerRecord<String, String> record = new ProducerRecord<>(
+        topic,  // Topic
+        key,    // Key
+        value   // Value
+    );
+
+    producer.send(record, (metadata, e) ->
+    {
+      long now = System.currentTimeMillis();
+      if (e == null)
+      {
+        // HANDLE SUCCESS
+        produced++;
+        log.debug(
+            "{} - Sent key={} message={} partition={}/{} timestamp={} latency={}ms",
+            id,
+            record.key(),
+            record.value(),
+            metadata.partition(),
+            metadata.offset(),
+            metadata.timestamp(),
+            now - time
+        );
+      }
+      else
+      {
+        // HANDLE ERROR
+        log.error(
+            "{} - ERROR key={} timestamp={} latency={}ms: {}",
+            id,
+            record.key(),
+            metadata == null ? -1 : metadata.timestamp(),
+            now - time,
+            e.toString()
+        );
+      }
+    });
+
+    long now = System.currentTimeMillis();
+    log.trace(
+        "{} - Queued message with key={} latency={}ms",
+        id,
+        record.key(),
+        now - time
+    );
+  }
+
+
+  public static void main(String[] args) throws Exception
+  {
+    String broker = ":9092";
+    String topic = "test";
+    String clientId = "DEV";
+
+    switch (args.length)
+    {
+      case 3:
+        clientId = args[2];
+      case 2:
+        topic = args[1];
+      case 1:
+        broker = args[0];
+    }
+
+    ExampleProducer instance = new ExampleProducer(broker, topic, clientId);
+
+    Runtime.getRuntime().addShutdownHook(new Thread(() ->
+    {
+      instance.running = false;
+      while (!instance.done)
+      {
+        log.info("Waiting for main-thread...");
+        try
+        {
+          Thread.sleep(1000);
+        }
+        catch (InterruptedException e) {}
+      }
+      log.info("Shutdown completed.");
+    }));
+
+    log.info(
+        "Running ExampleProducer: broker={}, topic={}, client-id={}",
+        broker,
+        topic,
+        clientId);
+    instance.run();
+  }
+}

diff --git a/src/main/java/de/juplo/kafka/ExampleProducer.java b/src/main/java/de/juplo/kafka/ExampleProducer.java
deleted file mode 100644 (file)
index c12a75e..0000000
--- a/src/main/java/de/juplo/kafka/ExampleProducer.java
+++ /dev/null
@@ -1,157 +0,0 @@
-package de.juplo.kafka;
-
-import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.producer.Producer;
-import org.apache.kafka.clients.producer.KafkaProducer;
-import org.apache.kafka.clients.producer.ProducerRecord;
-import org.apache.kafka.common.serialization.StringSerializer;
-
-import java.util.Properties;
-
-
-@Slf4j
-public class ExampleProducer
-{
-  private final String id;
-  private final String topic;
-  private final Producer<String, String> producer;
-
-  private volatile boolean running = true;
-  private volatile boolean done = false;
-  private long produced = 0;
-
-  public ExampleProducer(
-    String broker,
-    String topic,
-    String clientId)
-  {
-    Properties props = new Properties();
-    props.put("bootstrap.servers", broker);
-    props.put("client.id", clientId); // Nur zur Wiedererkennung
-    props.put("key.serializer", StringSerializer.class.getName());
-    props.put("value.serializer", StringSerializer.class.getName());
-    props.put("metadata.maxage.ms", 5000);
-
-    this.id = clientId;
-    this.topic = topic;
-    producer = new KafkaProducer<>(props);
-  }
-
-  public void run()
-  {
-    long i = 0;
-
-    try
-    {
-      for (; running; i++)
-      {
-        send(Long.toString(i%10), Long.toString(i));
-        Thread.sleep(500);
-      }
-    }
-    catch (Exception e)
-    {
-      log.error("{} - Unexpected error: {}!", id, e.toString());
-    }
-    finally
-    {
-      log.info("{}: Closing the KafkaProducer", id);
-      producer.close();
-      log.info("{}: Produced {} messages in total, exiting!", id, produced);
-      done = true;
-    }
-  }
-
-  void send(String key, String value)
-  {
-    final long time = System.currentTimeMillis();
-
-    final ProducerRecord<String, String> record = new ProducerRecord<>(
-        topic,  // Topic
-        key,    // Key
-        value   // Value
-    );
-
-    producer.send(record, (metadata, e) ->
-    {
-      long now = System.currentTimeMillis();
-      if (e == null)
-      {
-        // HANDLE SUCCESS
-        produced++;
-        log.debug(
-            "{} - Sent key={} message={} partition={}/{} timestamp={} latency={}ms",
-            id,
-            record.key(),
-            record.value(),
-            metadata.partition(),
-            metadata.offset(),
-            metadata.timestamp(),
-            now - time
-        );
-      }
-      else
-      {
-        // HANDLE ERROR
-        log.error(
-            "{} - ERROR key={} timestamp={} latency={}ms: {}",
-            id,
-            record.key(),
-            metadata == null ? -1 : metadata.timestamp(),
-            now - time,
-            e.toString()
-        );
-      }
-    });
-
-    long now = System.currentTimeMillis();
-    log.trace(
-        "{} - Queued message with key={} latency={}ms",
-        id,
-        record.key(),
-        now - time
-    );
-  }
-
-
-  public static void main(String[] args) throws Exception
-  {
-    String broker = ":9092";
-    String topic = "test";
-    String clientId = "DEV";
-
-    switch (args.length)
-    {
-      case 3:
-        clientId = args[2];
-      case 2:
-        topic = args[1];
-      case 1:
-        broker = args[0];
-    }
-
-    ExampleProducer instance = new ExampleProducer(broker, topic, clientId);
-
-    Runtime.getRuntime().addShutdownHook(new Thread(() ->
-    {
-      instance.running = false;
-      while (!instance.done)
-      {
-        log.info("Waiting for main-thread...");
-        try
-        {
-          Thread.sleep(1000);
-        }
-        catch (InterruptedException e) {}
-      }
-      log.info("Shutdown completed.");
-    }));
-
-    log.info(
-        "Running ExampleProducer: broker={}, topic={}, client-id={}",
-        broker,
-        topic,
-        clientId);
-    instance.run();
-  }
-}