Improve aiokafka instrumentation examples (#3466)

instrumentation/opentelemetry-instrumentation-aiokafka/src/opentelemetry/instrumentation/aiokafka/__init__.py

@@ -20,6 +20,7 @@ Usage
 
 .. code:: python
 
+    import asyncio
     from opentelemetry.instrumentation.aiokafka import AIOKafkaInstrumentor
     from aiokafka import AIOKafkaProducer, AIOKafkaConsumer
 
@@ -27,13 +28,27 @@ Usage
     AIOKafkaInstrumentor().instrument()
 
     # report a span of type producer with the default settings
-    producer = AIOKafkaProducer(bootstrap_servers=['localhost:9092'])
-    await producer.send('my-topic', b'raw_bytes')
+    async def produce():
+        producer = AIOKafkaProducer(bootstrap_servers=['localhost:9092'])
+        await producer.start()
+        try:
+            await producer.send_and_wait('my-topic', b'raw_bytes')
+        finally:
+            await producer.stop()
 
     # report a span of type consumer with the default settings
-    consumer = AIOKafkaConsumer('my-topic', group_id='my-group', bootstrap_servers=['localhost:9092'])
-    async for message in consumer:
-    # process message
+    async def consume():
+        consumer = AIOKafkaConsumer('my-topic', group_id='my-group', bootstrap_servers=['localhost:9092'])
+        await consumer.start()
+        try:
+            async for message in consumer:
+                # process message
+                print(message)
+        finally:
+            await consumer.stop()
+
+    asyncio.run(produce())
+    asyncio.run(consume())
 
 The _instrument() method accepts the following keyword args:
 tracer_provider (TracerProvider) - an optional tracer provider
@@ -47,12 +62,14 @@ for example:
 
 .. code:: python
 
-    from opentelemetry.instrumentation.kafka import AIOKafkaInstrumentor
+    import asyncio
+    from opentelemetry.instrumentation.aiokafka import AIOKafkaInstrumentor
     from aiokafka import AIOKafkaProducer, AIOKafkaConsumer
 
     async def async_produce_hook(span, args, kwargs):
         if span and span.is_recording():
             span.set_attribute("custom_user_attribute_from_async_response_hook", "some-value")
+
     async def async_consume_hook(span, record, args, kwargs):
         if span and span.is_recording():
             span.set_attribute("custom_user_attribute_from_consume_hook", "some-value")
@@ -62,8 +79,15 @@ for example:
 
     # Using kafka as normal now will automatically generate spans,
     # including user custom attributes added from the hooks
-    producer = AIOKafkaProducer(bootstrap_servers=['localhost:9092'])
-    await producer.send('my-topic', b'raw_bytes')
+    async def produce():
+        producer = AIOKafkaProducer(bootstrap_servers=['localhost:9092'])
+        await producer.start()
+        try:
+            await producer.send_and_wait('my-topic', b'raw_bytes')
+        finally:
+            await producer.stop()
+
+    asyncio.run(produce())
 
 API
 ___