Kafka

How to integrate with Storm?

How to integrate with Storm?

 

Both Apache Kafka and Storm complement each other for accurate real-time streaming analysis of the big data in very little time. Kafka-Storm integration allows developers to easily publish streams of data using Storm topologies and run continuously. 

 

Three main classes that oversee the integration of Kafka-Storm API are -

 

  • BrokerHosts 

 

The BrokerHosts interface consists of two implementations - ZkHosts and StaticHosts. ZkHosts offers a fast way for tracking and maintaining the details of Kafka brokers 9n ZooKeeper while StaticHosts manually select the Kafka brokers. 

The signature of ZkHosts is -

 

public ZkHosts(String brokerZkStr, String brokerZkPath)

public ZkHosts(String brokerZkStr)

 

where brokerZkStr refers to the ZooKeeper host and brokerZkPath is the ZooKeeper path for maintaining the Kafka broker and its details.

 

  • KafkaConfig API 

This API defines the configuration settings of the Kafka cluster and its signature is -

 

public KafkaConfig(BrokerHosts hosts, string topic)

 

where hosts are the BrokerHosts (ZkHosts / StaticHosts) and the topic corresponds to the name of the topic.

 

  • SpoutConfig API 

This API is an extension of KafkaConfigAPI and is responsible for storing additional ZooKeeper information. Its signature is -

 

public SpoutConfig(BrokerHosts hosts, string topic, string zkRoot, string id)

 

where zkRoot is the ZooKeeper root path and id corresponds to the state of the offsets that identifies the spout. 

 

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