Let's keep it simple and streaming
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The document provides an overview of Apache Pulsar, highlighting its features such as unified messaging, message delivery guarantees, and scalability. It discusses different subscription modes and the operational structure of Pulsar clusters, including the roles of producers, consumers, and message organization. Additionally, it presents integration examples with Spring applications and mentions various resources for further learning.
Let's keep it simple and streaming
- 1. Let's keep it simple and streaming Tim Spann Developer Advocate
- 2. Tim Spann Developer Advocate ● FLiP(N) Stack = Flink, Pulsar and NiFi Stack ● Streaming Systems/ Data Architect ● Experience: ○ 15+ years of experience with batch and streaming technologies including Pulsar, Flink, Spark, NiFi, Spring, Java, Big Data, Cloud, MXNet, Hadoop, Datalakes, IoT and more.
- 5. Proprietary & Confidential | Agenda 5 ● Introduction ● What is Apache Pulsar? ● Spring Apps ● Pulsar ● AMQP ● MQTT ● Kafka ● Demo
- 6. Proprietary & Confidential | 6 Apache Pulsar has a vibrant community 560+ Contributors 10,000+ Commits 7,000+ Slack Members 1,000+ Organizations Using Pulsar
- 8. Proprietary & Confidential | Streaming Consumer Consumer Consumer Subscription Shared Failover Consumer Consumer Subscription In case of failure in Consumer B-0 Consumer Consumer Subscription Exclusive X Consumer Consumer Key-Shared Subscription Pulsar Topic/Partition Messaging 8
- 9. Tenants / Namespaces / Topics Tenants (Compliance) Tenants (Data Services) Namespace (Microservices) Topic-1 (Cust Auth) Topic-1 (Location Resolution) Topic-2 (Demographics) Topic-1 (Budgeted Spend) Topic-1 (Acct History) Topic-1 (Risk Detection) Namespace (ETL) Namespace (Campaigns) Namespace (ETL) Tenants (Marketing) Namespace (Risk Assessment) Pulsar Cluster
- 10. Proprietary & Confidential | Messages - the basic unit of Pulsar 10 Component Description Value / data payload The data carried by the message. All Pulsar messages contain raw bytes, although message data can also conform to data schemas. Key Messages are optionally tagged with keys, used in partitioning and also is useful for things like topic compaction. Properties An optional key/value map of user-defined properties. Producer name The name of the producer who produces the message. If you do not specify a producer name, the default name is used. Sequence ID Each Pulsar message belongs to an ordered sequence on its topic. The sequence ID of the message is its order in that sequence.
- 11. Pulsar Cluster ● “Bookies” ● Stores messages and cursors ● Messages are grouped in segments/ledgers ● A group of bookies form an “ensemble” to store a ledger ● “Brokers” ● Handles message routing and connections ● Stateless, but with caches ● Automatic load-balancing ● Topics are composed of multiple segments ● ● Stores metadata for both Pulsar and BookKeeper ● Service discovery Store Messages Metadata & Service Discovery Metadata & Service Discovery Metadata Storage
- 12. Producer-Consumer Producer Consumer Publisher sends data and doesn't know about the subscribers or their status. All interactions go through Pulsar and it handles all communication. Subscriber receives data from publisher and never directly interacts with it Topic Topic
- 13. Apache Pulsar: Messaging vs Streaming Message Queueing - Queueing systems are ideal for work queues that do not require tasks to be performed in a particular order. Streaming - Streaming works best in situations where the order of messages is important.
- 14. Pulsar Subscription Modes Different subscription modes have different semantics: Exclusive/Failover - guaranteed order, single active consumer Shared - multiple active consumers, no order Key_Shared - multiple active consumers, order for given key Producer 1 Producer 2 Pulsar Topic Subscription D Consumer D-1 Consumer D-2 Key-Shared < K 1, V 10 > < K 1, V 11 > < K 1, V 12 > < K 2 ,V 2 0 > < K 2 ,V 2 1> < K 2 ,V 2 2 > Subscription C Consumer C-1 Consumer C-2 Shared < K 1, V 10 > < K 2, V 21 > < K 1, V 12 > < K 2 ,V 2 0 > < K 1, V 11 > < K 2 ,V 2 2 > Subscription A Consumer A Exclusive Subscription B Consumer B-1 Consumer B-2 In case of failure in Consumer B-1 Failover
- 15. Flexible Pub/Sub API for Pulsar - Shared Consumer consumer = client.newConsumer() .topic("my-topic") .subscriptionName("work-q-1") .subscriptionType(SubType.Shared) .subscribe();
- 16. Flexible Pub/Sub API for Pulsar - Failover Consumer consumer = client.newConsumer() .topic("my-topic") .subscriptionName("stream-1") .subscriptionType(SubType.Failover) .subscribe();
- 17. Proprietary & Confidential | Data Offloaders (Tiered Storage) Client Libraries StreamNative Pulsar ecosystem hub.streamnative.io Connectors (Sources & Sinks) Protocol Handlers Pulsar Functions (Lightweight Stream Processing) Processing Engines … and more! … and more!
- 21. Schema Registry Schema Registry schema-1 (value=Avro/Protobuf/JSON) schema-2 (value=Avro/Protobuf/JSON) schema-3 (value=Avro/Protobuf/JSON) Schema Data ID Local Cache for Schemas + Schema Data ID + Local Cache for Schemas Send schema-1 (value=Avro/Protobuf/JSON) data serialized per schema ID Send (register) schema (if not in local cache) Read schema-1 (value=Avro/Protobuf/JSON) data deserialized per schema ID Get schema by ID (if not in local cache) Producers Consumers
- 22. Building Real-Time Requires a Team
- 24. Pulsar - Spring - Code @Autowired private PulsarTemplate<Observation> pulsarTemplate; this.pulsarTemplate.setSchema(Schema. JSON(Observation.class)); MessageId msgid = pulsarTemplate.newMessage(observation) .withMessageCustomizer((mb) -> mb.key( uuidKey.toString())) .send(); @PulsarListener(subscriptionName = "aq-spring-reader", subscriptionType = Shared, schemaType = SchemaType. JSON, topics = "persistent://public/default/aq-pm25") void echoObservation(Observation message) { this.log.info("PM2.5 Message received: {}", message); }
- 25. Pulsar - Spring - Configuration spring: pulsar: client: service-url: pulsar+ssl://sn-academy.sndevadvocate.snio.cloud:6651 auth-plugin-class-name: org.apache.pulsar.client.impl.auth.oauth2.AuthenticationOAuth2 authentication: issuer-url: https://auth.streamnative.cloud/ private-key: file:///scr/sndevadvocate-tspann.json audience: urn:sn:pulsar:sndevadvocate:my-instance producer: batching-enabled: false send-timeout-ms: 90000 producer-name: airqualityjava topic-name: persistent://public/default/airquality
- 26. Spring - Pulsar as Kafka https://www.baeldung.com/spring-kafka @Bean public KafkaTemplate<String, Observation> kafkaTemplate() { KafkaTemplate<String, Observation> kafkaTemplate = new KafkaTemplate<String, Observation>(producerFactory()); return kafkaTemplate; } ProducerRecord<String, Observation> producerRecord = new ProducerRecord<>(topicName, uuidKey.toString(), message); kafkaTemplate.send(producerRecord);
- 27. Spring - MQTT - Pulsar https://roytuts.com/publish-subscribe-message-onto-mqtt-using-spring/ @Bean public IMqttClient mqttClient( @Value("${mqtt.clientId}") String clientId, @Value("${mqtt.hostname}") String hostname, @Value("${mqtt.port}") int port) throws MqttException { IMqttClient mqttClient = new MqttClient( "tcp://" + hostname + ":" + port, clientId); mqttClient.connect(mqttConnectOptions()); return mqttClient; } MqttMessage mqttMessage = new MqttMessage(); mqttMessage.setPayload(DataUtility.serialize(payload)); mqttMessage.setQos(0); mqttMessage.setRetained(true); mqttClient.publish(topicName, mqttMessage);
- 28. Spring - AMQP - Pulsar https://www.baeldung.com/spring-amqp rabbitTemplate.convertAndSend(topicName, DataUtility.serializeToJSON(observation)); @Bean public CachingConnectionFactory connectionFactory() { CachingConnectionFactory ccf = new CachingConnectionFactory(); ccf.setAddresses(serverName); return ccf; }
- 29. Reactive Spring - Pulsar
- 30. Reactive Spring - Pulsar
- 31. REST + Spring Boot + Pulsar + Friends
- 32. FLiP Stack Weekly This week in Apache Flink, Apache Pulsar, Apache NiFi, Apache Spark, Java and Open Source friends. https://bit.ly/32dAJft
- 33. Demo
- 34. ● https://streamnative.io/blog/engineering/2022-11-29-spring-into-pulsar-part-2-spri ng-based-microservices-for-multiple-protocols-with-apache-pulsar/ ● https://streamnative.io/blog/release/2022-09-21-announcing-spring-for-apache-pu lsar/ ● https://docs.spring.io/spring-pulsar/docs/current-SNAPSHOT/reference/html/ ● https://spring.io/blog/2022/08/16/introducing-experimental-spring-support-for-apa che-pulsar ● https://medium.com/@tspann/using-the-new-spring-boot-apache-pulsar-integratio n-8a38447dce7b Spring + Pulsar References
- 35. ● https://spring.io/guides/gs/spring-boot/ ● https://spring.io/projects/spring-amqp/ ● https://spring.io/projects/spring-kafka/ ● https://github.com/spring-projects/spring-integration-kafka ● https://github.com/spring-projects/spring-integration ● https://github.com/spring-projects/spring-data-relational ● https://github.com/spring-projects/spring-kafka ● https://github.com/spring-projects/spring-amqp Spring Things
- 36. 36 Apache Pulsar in Action Please enjoy David’s complete book which is the ultimate guide to Pulsar.
- 38. Notices Apache Pulsar™ Apache®, Apache Pulsar™, Pulsar™, Apache Flink®, Flink®, Apache Spark®, Spark®, Apache NiFi®, NiFi® and the logo are either registered trademarks or trademarks of the Apache Software Foundation in the United States and/or other countries. No endorsement by The Apache Software Foundation is implied by the use of these marks. Copyright © 2021-2022 The Apache Software Foundation. All Rights Reserved. Apache, Apache Pulsar and the Apache feather logo are trademarks of The Apache Software Foundation.