Merge pull request #11 from anasabbal/readme

update README.md

README.md

@@ -20,7 +20,63 @@ cd Donwloads
 ```
 PATH="$PATH:/Users/yourusername/kafka_2.13-3.1.0/bin"
 ```
-
+# Basic Kafka
+Apache Kafka depends on Zookeeper for cluster management, first step we need to start Zookeeper
+```
+➜  ~zookeeper-server-start /usr/local/etc/kafka/zookeeper.properties
+[2023-01-10 01:55:30,922] INFO KafkaConfig values:
+	advertised.listeners = null
+	alter.config.policy.class.name = null
+	alter.log.dirs.replication.quota.window.num = 11
+	alter.log.dirs.replication.quota.window.size.seconds = 1
+	authorizer.class.name =
+	auto.create.topics.enable = true
+	auto.leader.rebalance.enable = true
+	background.threads = 10
+	broker.heartbeat.interval.ms = 2000
+	broker.id = 0
+	broker.id.generation.enable = true
+	broker.rack = null
+	broker.session.timeout.ms = 9000
+	.
+	.
+	.
+```
+After that we run kafka server
+```
+➜  ~kafka-server-start /usr/local/etc/kafka/server.properties
+Manager$ThrottledChannelReaper)
+[2023-01-10 01:58:54,857] INFO [ThrottledChannelReaper-Request]: Starting (kafka.server.ClientQuotaManager$ThrottledChannelReaper)
+[2023-01-10 01:58:54,864] INFO [ThrottledChannelReaper-ControllerMutation]: Starting (kafka.server.ClientQuotaManager$ThrottledChannelReaper)
+[2023-01-10 01:58:55,015] INFO Loading logs from log dirs ArraySeq(/usr/local/var/lib/kafka-logs) (kafka.log.LogManager)
+[2023-01-10 01:58:55,029] INFO Skipping recovery for all logs in /usr/local/var/lib/kafka-logs since clean shutdown file was found (kafka.log.LogManager)
+[2023-01-10 01:58:55,097] INFO Loaded 0 logs in 81ms. (kafka.log.LogManager)
+[2023-01-10 01:58:55,100] INFO Starting log cleanup with a period of 300000 ms. (kafka.log.LogManager)
+[2023-01-10 01:58:55,111] INFO Starting log flusher with a default period of 9223372036854775807 ms. (kafka.log.LogManager)
+[2023-01-10 01:58:55,700] INFO [feature-zk-node-event-process-thread]: Starting (kafka.server.FinalizedFeatureChangeListener$ChangeNotificationProcessorThread)
+[2023-01-10 01:58:55,801] INFO [MetadataCache brokerId=0] Updated cache from existing <empty> to latest FinalizedFeaturesAndEpoch(features=Map(), epoch=0). (kafka.server.metadata.ZkMetadataCache)
+[2023-01-10 01:58:55,930] INFO [BrokerToControllerChannelManager broker=0 name=forwarding]: Starting (kafka.server.BrokerToControllerRequestThread)
+[2023-01-10 01:58:57,421] INFO Updated connection-accept-rate max connection creation rate to 2147483647 (kafka.network.ConnectionQuotas)
+```
+Creat a topic is a category or feed name to which records are published. Topics in Kafka are always multi-subscriber; that is, a topic can have zero, one, or many consumers that subscribe to the data written to it
+```
+$ kafka-topics --create --bootstrap-server localhost:9092 --replication-factor 1 --partitions 1 --topic test
+```
+Initialize Producer console
+```
+$ kafka-console-producer --broker-list localhost:9092 --topic test
+>send first message
+>send second message
+>wow it is working
+```
+Initialize Consumer console
+```
+$ kafka-console-consumer --bootstrap-server localhost:9092 --topic test --from-beginningsend 
+first message
+send second message
+wow it is working
+```
+!!! Congratulation
 # Apache Kafka Example
 Consumer Config
 ```java