`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..a764588
--- /dev/null
+++ b/src/main/java/de/juplo/kafka/ExampleConsumer.java
@@ -0,0 +1,154 @@
+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());
+
+    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);
+    }
+    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 sendRequested = System.currentTimeMillis();
+
+    final ProducerRecord<String, String> record = new ProducerRecord<>(
+      topic,  // Topic
+      key,    // Key
+      value   // Value
+    );
+
+    producer.send(record, (metadata, e) ->
+    {
+      long sendRequestProcessed = System.currentTimeMillis();
+      if (e == null)
+      {
+        // HANDLE SUCCESS
+        log.debug(
+          "{} - Sent message {}={}, partition={}, offset={}, timestamp={}, latency={}ms",
+          id,
+          key,
+          value,
+          metadata.partition(),
+          metadata.offset(),
+          metadata.timestamp(),
+          sendRequestProcessed - sendRequested
+        );
+      }
+      else
+      {
+        // HANDLE ERROR
+        log.error(
+          "{} - ERROR for message {}={}, latency={}ms: {}",
+          id,
+          key,
+          value,
+          sendRequestProcessed - sendRequested,
+          e.toString()
+        );
+      }
+    });
+
+    long sendRequestQueued = System.currentTimeMillis();
+    produced++;
+    log.trace(
+      "{} - Queued message {}={}, latency={}ms",
+      id,
+      key,
+      value,
+      sendRequestQueued - sendRequested
+    );
+  }
+
+
+  public static void main(String[] args) throws Exception
+  {
+    if (args.length != 3)
+    {
+      log.error("Three arguments required!");
+      log.error("arg[0]: Broker-Address");
+      log.error("arg[1]: Topic");
+      log.error("arg[2]: Unique Client-ID");
+      System.exit(1);
+      return;
+    }
+
+    log.info(
+      "Running ExampleProducer: broker={}, topic={}, client-id={}",
+      args[0],
+      args[1],
+      args[2]);
+
+    ExampleProducer instance = new ExampleProducer(args[0], args[1], args[2]);
+
+    Runtime.getRuntime().addShutdownHook(new Thread(() ->
+    {
+      instance.running = false;
+      while (!instance.done)
+      {
+        log.info("{} - Waiting for main-thread...", instance.id);
+        try
+        {
+          Thread.sleep(1000);
+        }
+        catch (InterruptedException e) {}
+      }
+      log.info("{} - Shutdown completed.", instance.id);
+    }));
+
+    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 a764588..0000000
--- a/src/main/java/de/juplo/kafka/ExampleProducer.java
+++ /dev/null
@@ -1,154 +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());
-
-    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);
-    }
-    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 sendRequested = System.currentTimeMillis();
-
-    final ProducerRecord<String, String> record = new ProducerRecord<>(
-      topic,  // Topic
-      key,    // Key
-      value   // Value
-    );
-
-    producer.send(record, (metadata, e) ->
-    {
-      long sendRequestProcessed = System.currentTimeMillis();
-      if (e == null)
-      {
-        // HANDLE SUCCESS
-        log.debug(
-          "{} - Sent message {}={}, partition={}, offset={}, timestamp={}, latency={}ms",
-          id,
-          key,
-          value,
-          metadata.partition(),
-          metadata.offset(),
-          metadata.timestamp(),
-          sendRequestProcessed - sendRequested
-        );
-      }
-      else
-      {
-        // HANDLE ERROR
-        log.error(
-          "{} - ERROR for message {}={}, latency={}ms: {}",
-          id,
-          key,
-          value,
-          sendRequestProcessed - sendRequested,
-          e.toString()
-        );
-      }
-    });
-
-    long sendRequestQueued = System.currentTimeMillis();
-    produced++;
-    log.trace(
-      "{} - Queued message {}={}, latency={}ms",
-      id,
-      key,
-      value,
-      sendRequestQueued - sendRequested
-    );
-  }
-
-
-  public static void main(String[] args) throws Exception
-  {
-    if (args.length != 3)
-    {
-      log.error("Three arguments required!");
-      log.error("arg[0]: Broker-Address");
-      log.error("arg[1]: Topic");
-      log.error("arg[2]: Unique Client-ID");
-      System.exit(1);
-      return;
-    }
-
-    log.info(
-      "Running ExampleProducer: broker={}, topic={}, client-id={}",
-      args[0],
-      args[1],
-      args[2]);
-
-    ExampleProducer instance = new ExampleProducer(args[0], args[1], args[2]);
-
-    Runtime.getRuntime().addShutdownHook(new Thread(() ->
-    {
-      instance.running = false;
-      while (!instance.done)
-      {
-        log.info("{} - Waiting for main-thread...", instance.id);
-        try
-        {
-          Thread.sleep(1000);
-        }
-        catch (InterruptedException e) {}
-      }
-      log.info("{} - Shutdown completed.", instance.id);
-    }));
-
-    instance.run();
-  }
-}