Run code without thinking about servers.

For mac, one can install Kafka using following command. Since Kafka is dependent on zookeeper, so zookeeper should be installed before Kafka

brew install zookeeper
brew install kafka

To run the kafka,

brew services start zookeeper
brew services start kafka

If that doesn't work, one can try by following commands:

zookeeper-server-start /usr/local/etc/kafka/zookeeper.properties 
kafka-server-start /usr/local/etc/kafka/server.properties

Kafka Topic creation can be done as follows:

kafka-topics --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic <topic-name>

List the Available Kafka Topics:

kafka-topics --list --zookeeper localhost:2181

Read the particular kafka topic:

kafka-console-consumer --zookeeper localhost:2181 --topic <topic-name> --from-beginning

Delete the particular kafka topic:

kafka-topics --delete --zookeeper localhost:2181 --topic <topic-name>

Install mongodb according to the operating system you are using. Eg. for MAC, just do

brew install mongo

Create a data directory in which all mongodb data would reside and give it appropriate permission. By default, mongodb considers /data/db as the path, so you can create at the same path as follows:

sudo mkdir -p /data/db

sudo chmod 0755 /data/db

Run following command to start the mongo db server

sudo mongod

This starts the mongodb server at 127.0.0.1:27017

Run the following command to start the mongodb client:

mongo

To create the empty database in mongodb, do

use faas

It is a flask application, so it can be started by following command inside the source-service/ folder:

python data-service.py

Now go to http://127.0.0.1:5000/ and you will see a textbox and submit button. Just enter the data here and you will see it in Kakfa topic

It is a flask application, so it can be started by following command inside the function-as-a-service/webservice/ folder:

python application.py

Go to index.html by doubling clicking on it.