BAEL-5698 (#12858)

* [BAEL-4849] Article code

* [BAEL-4968] Article code

* [BAEL-4968] Article code

* [BAEL-4968] Article code

* [BAEL-4968] Remove extra comments

* [BAEL-5258] Article Code

* [BAEL-2765] PKCE Support for Secret Clients

* [BAEL-5698] Article code

* [BAEL-5698] Article code

rabbitmq/src/main/java/com/baeldung/benchmark/Worker.java

@@ -0,0 +1,59 @@
+package com.baeldung.benchmark;
+
+import java.io.IOException;
+import java.util.Random;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CountDownLatch;
+
+
+import com.rabbitmq.client.Channel;
+import com.rabbitmq.client.Connection;
+
+public class Worker implements Callable<Worker.WorkerResult> {
+    
+    private final Channel channel;
+    private int iterations;
+    private final CountDownLatch counter;
+    private final String queue;
+    private final byte[] payload;
+
+    Worker(String queue, Connection conn, int iterations, CountDownLatch counter, int payloadSize) throws IOException {
+        this.iterations = iterations;
+        this.counter = counter;
+        this.queue = queue;
+
+        channel = conn.createChannel();
+        channel.queueDelete(queue);
+        channel.queueDeclare(queue, false, false, true, null);
+
+        this.payload = new byte[payloadSize];
+        new Random().nextBytes(payload);
+
+    }
+
+    @Override
+    public WorkerResult call() throws Exception {
+
+        try {
+            long start = System.currentTimeMillis();
+            for (int i = 0; i < iterations; i++) {
+                channel.basicPublish("", queue, null, payload);
+            }
+
+            long elapsed = System.currentTimeMillis() - start;
+            channel.queueDelete(queue);
+            return new WorkerResult(elapsed);
+        } finally {
+            counter.countDown();
+        }
+    }
+    
+    
+    public static class WorkerResult {
+        public final long elapsed;
+
+        WorkerResult(long elapsed) {
+            this.elapsed = elapsed;
+        }
+    }
+}