X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2FSimpleProducer.java;h=fd03d732d0d53ba46b463f8dd907edc9d410e1cc;hb=7eb2c864e132b2e1b14c7971d06b4b2c960b4170;hp=5f5792581d860a8b119e5e561250929bc8f35319;hpb=d4bf2b7400df95df6c3f2534519671e596163be2;p=demos%2Fkafka%2Ftraining

diff --git a/src/main/java/de/juplo/kafka/SimpleProducer.java b/src/main/java/de/juplo/kafka/SimpleProducer.java
index 5f57925..fd03d73 100644
--- a/src/main/java/de/juplo/kafka/SimpleProducer.java
+++ b/src/main/java/de/juplo/kafka/SimpleProducer.java
@@ -11,78 +11,141 @@ import java.util.Properties;
 @Slf4j
 public class SimpleProducer
 {
-  public static void main(String[] args) throws Exception
+  private final String id;
+  private final String topic;
+  private final KafkaProducer<String, String> producer;
+
+  private long produced = 0;
+  private volatile boolean running = true;
+  private volatile boolean done = false;
+
+  public SimpleProducer(String broker, String topic, String id)
   {
-    // tag::create[]
     Properties props = new Properties();
-    props.put("bootstrap.servers", "localhost:9092");
+    props.put("bootstrap.servers", broker);
+    props.put("client.id", id); // Nur zur Wiedererkennung
     props.put("key.serializer", StringSerializer.class.getName());
     props.put("value.serializer", StringSerializer.class.getName());
 
-    KafkaProducer<String, String> producer = new KafkaProducer<>(props);
-    // end::create[]
+    producer = new KafkaProducer<>(props);
 
-    String id = "P";
+    this.topic = topic;
+    this.id = id;
+  }
+
+  public void run()
+  {
     long i = 0;
 
     try
     {
-      for (; i < 100 ; i++)
+      for (; running ; i++)
       {
-        final long time = System.currentTimeMillis();
+        send(Long.toString(i%10), Long.toString(i));
+        Thread.sleep(500);
+      }
+    }
+    catch (InterruptedException e) {}
+    finally
+    {
+      log.info("{}: Closing the KafkaProducer", id);
+      producer.close();
+      log.info("{}: Produced {} messages in total, exiting!", id, produced);
+      done = true;
+    }
+  }
 
-        final ProducerRecord<String, String> record = new ProducerRecord<>(
-            "test",              // Topic
-            Long.toString(i%10), // Key
-            Long.toString(i)     // Value
-        );
+  void send(String key, String value)
+  {
+    final long time = System.currentTimeMillis();
 
-        producer.send(record, (metadata, e) ->
-        {
-          long now = System.currentTimeMillis();
-          if (e == null)
-          {
-            // HANDLE SUCCESS
-            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 #{} key={} latency={}ms",
+    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,
-            i,
             record.key(),
+            record.value(),
+            metadata.partition(),
+            metadata.offset(),
+            metadata.timestamp(),
             now - time
         );
       }
-    }
-    finally
+      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 #{} key={} latency={}ms",
+        id,
+        value,
+        record.key(),
+        now - time
+    );
+  }
+
+
+  public static void main(String[] args) throws Exception
+  {
+    String broker = ":9092";
+    String topic = "test";
+    String clientId = "DEV";
+
+    switch (args.length)
     {
-      log.info("{}: Closing the KafkaProducer", id);
-      producer.close();
-      log.info("{}: Exiting!", id);
+      case 3:
+        clientId = args[2];
+      case 2:
+        topic = args[1];
+      case 1:
+        broker = args[0];
     }
+
+    SimpleProducer producer = new SimpleProducer(broker, topic, clientId);
+
+    Runtime.getRuntime().addShutdownHook(new Thread(() ->
+    {
+      producer.running = false;
+      while (!producer.done)
+      {
+        log.info("Waiting for producer...");
+        try
+        {
+          Thread.sleep(1000);
+        }
+        catch (InterruptedException e) {}
+      }
+      log.info("Shutdown completed.");
+    }));
+
+    log.info(
+        "Running simple producer: broker={}, topic={}, client-id={}",
+        broker,
+        topic,
+        clientId);
+    producer.run();
   }
 }