TDC Connections 2023 - A High-Speed Data Ingestion Service in Java Using MQTT, AMQP, and STOMP

A High-Speed Data Ingestion Service in
Java Using MQTT, AMQP, and STOMP
The Developer’s Conference – TDC Connections 2023
Juarez Barbosa Junior - @juarezjunior
March 2023
Copyright © 2022, Oracle and/or its affiliates

Agenda
• Java App Dev with Oracle Database
• Support for the Latest Java Versions
• MOM, ActiveMQ, AMQP, MQTT, STOMP, REST
• Reactive Streams Ingestion (RSI) and RSI PushPublisher
• ActiveMQ and JMS Message Consumer
• Sample Architecture
• Project Structure
• Demo: Running the Sample App
• Live Labs
• Free Oracle Cloud Account
• Oracle ACE Program
• Thank you – Juarez Jr

Java App Dev with Oracle Database

Support for the Latest Java Versions
• Java 11 - native support, compiled with it
• Java 17 - certified
• JDBC Standards - 4.2 and 4.3
• JMS 1.1 - latest is 2.0
• GraalVM - native image instrumentation
• Reactive Streams - Java Flow API support
• Project Loom - Virtual Threads support
• Data access is critical in mission-critical apps

MOM - Message-Oriented Middleware
• A middleware component that allows
communication and exchanges the data
(messages).
• It involves passing data between applications
using a communication channel that carries self-
contained units of information (messages).
• In a MOM-based communication environment,
messages are sent and received asynchronously.
• Apache ActiveMQ

AMQP – Advanced Message
Queuing Protocol
• The Advanced Message Queuing Protocol
(AMQP) is an open standard for passing
business messages between applications or
organizations.
• Organizations – applications in different
organizations
• Technologies – applications on different
platforms
• Time – systems don’t need to be available
simultaneously
• Space – reliably operates at a distance, or
over poor networks

AMQP – Advanced Message
Queuing Protocol
• The Advanced Message Queuing Protocol
(AMQP) is an open standard for passing
business messages between applications or
organizations.
• Realize the savings commoditization
brings; remove vendor lock-in
• Connect applications on different
platforms; choose the right platform for
the job
• Connect to business partners using a full-
featured open standard; remove
technical barriers to trade
• Position for innovations built upon the
foundation of AMQP
• Security, Reliability, Interoperability,
Standard, Openness

MQTT – Message Queuing
Telemetry Transport
• An OASIS standard messaging protocol for
the Internet of Things (IoT). It is designed as
an extremely lightweight publish/subscribe
messaging transport that is ideal for
connecting remote devices with a small code
footprint and minimal network bandwidth.

STOMP – Simple (or
Streaming) Text Orientated
Messaging Protocol
• STOMP provides an interoperable wire
format so that STOMP clients can
communicate with any STOMP message
broker to provide easy and widespread
messaging interoperability among many
languages, platforms and brokers..

Reactive Streams Ingestion (RSI)
⚫ PushPublisher API
// Push Publisher for Simple Usage
PushPublisher<Customer> pushPublisher =
ReactiveStreamsIngestion.pushPublisher();
pushPublisher.subscribe(rsi.subscriber());
// Ad-hoc usage
pushPublisher.accept(
new Customer(1, "John Doe", "North"));
// As a Consumer of a Stream
Customer[] customers = …
Stream
.of(customers)
.filter(c -> c.region.equals("NORTH"))
.forEach(pushPublisher::accept);
// As a Consumer for 3rd party Reactive Stream
// Libraries eg: Reactor https://projectreactor.io/
Flux
.just(
new Customer(1, "John Doe", "North"),
new Customer(2, "Jane Smith", "South"))
.concatWithValues(new Customer(3, "Bob", "South"))
.doOnComplete(() -> {System.out.println("Done!");})
.doOnCancel(() -> {System.out.println("Canceled!");})
.subscribe(pushPublisher::accept);

Reactive Streams Ingestion (RSI)
⚫ Java Library for Reactive Streams Ingestion
⚫ Streaming capability: Ingest data in an unblocking, and
reactive way from a large group of clients
⚫ Group records through RAC (Real App Clusters),
and Shard affinity using native UCP (Universal Connection
Pool)
⚫ Optimize CPU allocation while decoupling record
Processing from I/O
⚫ Fastest insert method for the Oracle Database through
Direct Path Insert, bypassing SQL and writing directly into the DB files

Overview of Oracle DB Access with Java
User
Java
Code
JDBC
Reactive
Extension Standard
JDBC API
R2DBC
+
3rd party
Reactive
Streams
Libraries
Async call with non-blocking
backpressure
operators (map, reduce, filters),
concurrency modeling,
monitoring, tracing
Implements Java SE
reactive stream
interface (Flow)
Full Reactive
Streams
Sync/blocking JDBC calls
Java
Business
Logic
User Java code
Oracle
Database
Oracle JDBC
driver
VTs/lightweight JDBC calls

ActiveMQ & JMS Message Consumer
⚫ ActiveMQ
⚫ ActiveMQ is a Java-based open-source message broker which supports REST API and
various wire-level protocols, such as MQTT, AMQP, and STOMP.
⚫ JMS Message Consumer
⚫ Like with any messaging-based application, you need to create a receiver that will
handle the messages that have been sent. The sample code snippet creates an AMQP
connection that connects to ActiveMQ using the given username, password,
hostname, and port number.
⚫ Port number 5672 is the default port that ActiveMQ is listening to over the AMQP
protocol when it starts up. It also creates a topic subscriber (consumer) to receive
messages that have been published to the "event" topic.

ActiveMQ & JMS Message Consumer

Demo Architecture

Project Structure

Demo: Running the Sample Demo
Container
Pipelines,
Jenkins, etc.
Build
Test
Push
Push Docker
images to
Registry
Cloud
Infrastructur
e Registry
Container
Engine for
Kubernetes
Pull images
from Registry
Deploy
images to
production
Kubernetes
worker nodes
Containers
running
microservices
deployed over
Kubernetes
ORACLE CLOUD INFRASTRUCTURE
ATP, ADW, ATP-D,
AFDW-D
Memoptimized
Rowstore
RSI Runtime: Non-
blocking, optimized library
for streaming data
through Direct Path, Shard
& RAC/FAN support.
HTTP / REST Engine over
Helidon
Define build
for CI/CD
toolchain
gRPC / AMQP / MQTT
Engines
Microservices
Files / Logs
IoT
Devices
/
Apps
cv
MQTT
gRPC
AMQP
HTTP / REST
JDBC
Direct Path
INSERT
Record
Streaming
over
multiple
protocols.

About me
• Juarez Barbosa Junior - @juarezjunior
• Senior Principal Java Developer Evangelist
• 27 years of experience
• SW Engineering, Developer Relations
• Microsoft, Oracle, IBM, Nokia, Unisys, Accenture, and a
few startups
• Microsoft Azure Developer Relations Lead
• IBM Watson Tech Evangelist & Cloud Rockstar
• IBM Mobile Tech Evangelist & Global Thought Leader
• Nokia Developers Global Champion
• Lead Software/DevOps Architect
• Expertise
• Java, Cloud, DevOps, Cloud-native, Blockchain

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