Add README.md

README.md

+# spring-boot-kafka
+
+This module contains articles about Spring with Kafka
+
+Intro
+This is a simple Spring Boot app to demonstrate sending and receiving of messages in Kafka using spring-kafka.
+
+As Kafka topics are not created automatically by default, this application requires that you create the following topics manually.
+
+``
+$ kafka-topics --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic kafkaexample
+$ kafka-topics --create --zookeeper localhost:2181 --replication-factor 1 --partitions 5 --topic portitioned
+$ kafka-topics --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic filtered
+$ kafka-topics --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic greeting
+``
+
+When the application runs successfully, following output is logged on to console (along with spring logs):
+
+Message received from the 'kafkaexample' topic by the basic listeners with groups test and sample
+``
+Received Message in group 'test': Hello, World!
+Received Message in group 'sample': Hello, World!
+``
+
+Message received from the 'kafkaexample' topic, with the partition info
+``
+Received Message: Hello, World! from partition: 0
+``
+
+Message received from the 'partitioned' topic, only from specific partitions
+``
+Received Message: Hello To Partioned Topic! from partition: 0
+Received Message: Hello To Partioned Topic! from partition: 3
+``
+
+Message received from the 'filtered' topic after filtering
+``
+Received Message in filtered listener: Hello Rajesh!
+``
+
+Message (Serialized Java Object) received from the 'greeting' topic
+``
+Received greeting message: Greetings, World!!
+``
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