kafka-producer-consumer basics

Author: cloudintro

.gitignore

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README.md

@@ -1,2 +1,21 @@
 # python-elasticsearch-with-kafka
 Python Restful service with elasticsearch and kafka integration
+
+
+1) Start Zookeeper node instance
+   linux > bin/zookeeper-server-start.sh config/zookeeper.properties
+   windows > bin\windows\zookeeper-server-start.bat config\zookeeper.properties
+
+2) Start Kafka server
+   linux > bin/kafka-server-start.sh config/server.properties
+   windows > bin\windows\kafka-server-start.bat config\server.properties
+
+3) Once kafka service is up create the kafka topic
+> bin/kafka-topic.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic kafka-message-topic
+
+4) consuming test message
+> bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic kafka-message-topic --from-beginning
+
+4) produce test message
+> bin/kafka-console-producer.sh --bootstrap-server localhost:9092 --topic kafka-message-topic
+> Hello Listeners

quick-data/app/.gitignore

@@ -0,0 +1,130 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+*.iml
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/

quick-data/app/requirements.txt

@@ -0,0 +1,6 @@
+requests
+starlette
+pydantic
+fastapi
+uvicorn
+kafka-python

quick-data/app/src/__init__.py

@@ -0,0 +1,5 @@
+
+
+bootstrap_servers = ['localhost:9092']
+topic_name = 'python-kafka-topic'
+group_id = 'python-kafka-group'

quick-data/app/src/config/__init__.py

@@ -0,0 +1,9 @@
+
+
+def init_app():
+    print('Hello World!')
+
+
+
+if __name__ == "__main__":
+    init_app()

quick-data/app/src/config/kafka_config.py

@@ -0,0 +1,25 @@
+from kafka import KafkaConsumer
+from kafka.errors import KafkaError
+import json
+
+bootstrap_servers = ['localhost:9092']
+topic_name = 'python-kafka-topic'
+group_id = 'python-kafka-group'
+
+consumer_str = KafkaConsumer(topic_name, group_id=group_id, bootstrap_servers=bootstrap_servers)
+consumer_json = KafkaConsumer(topic_name, bootstrap_servers=bootstrap_servers,
+                              value_deserializer=lambda m: json.loads(m.decode('utf-8')))
+
+consumer = KafkaConsumer(topic_name, bootstrap_servers= bootstrap_servers, auto_offset_reset='earliest',
+                         enable_auto_commit=True, group_id=group_id,
+                         value_deserializer=lambda x: json.loads(x.decode('utf-8')))
+
+
+def consume_str_message():
+    for msg in consumer_str:
+        print("Topic Name=%s,Message=%s" % (msg.topic, msg.value))
+
+
+def consume_json_message():
+    for msg in consumer_json:
+        print("Topic Name=%s,Message=%s" % (msg.topic, msg.value))

quick-data/app/src/main.py

@@ -0,0 +1,23 @@
+from kafka import KafkaProducer
+from kafka.errors import KafkaError
+import json
+
+bootstrap_servers = ['localhost:9092']
+topic_name = 'python-kafka-topic'
+
+producer_str = KafkaProducer(bootstrap_servers=bootstrap_servers)
+producer_json = KafkaProducer(bootstrap_servers=bootstrap_servers,
+                              value_serializer=lambda v: json.dumps(v).encode('utf-8'))
+
+
+def publish_message():
+    future = producer_str.send(topic_name, b'Hello from kafka...')
+    try:
+        record_metadata = future.get(timeout=10)
+    except KafkaError as err:
+        print(f"An exception happened {err}")
+
+
+def publish_json():
+    json_data = {'name': 'python-kafka-client', 'website': 'smallintro.github.io'}
+    producer_json.send(topic_name, json_data)