by Example

Messaging

The core messaging capabilities of NATS including pub-sub, request-reply, and queue groups.

• Core Publish-Subscribe
• Request-Reply
• JSON for Message Payloads
• Protobuf for Message Payloads
• Concurrent Message Processing
• Iterating Over Multiple Subscriptions

JetStream

An integrated subsystem providing distributed persistence.

• Limits-based Stream
• Interest-based Stream
• Work-queue Stream
• Pull Consumers
• Pull Consumer - Applying Limits
• Push Consumers (legacy)
• Queue Push Consumers (legacy)
• Multi-Stream Consumption (legacy)
• Migration to new JetStream API
• Consumer - Fetch Messages
• Subject-Mapped Partitions

Authentication and Authorization

Topics related to authentication and authorization.

• Programmatic NKeys and JWTs
• Configuring the System Account
• Private Inbox
• Auth Callout - Centralized
• Auth Callout - Decentralized
• Private Inbox using JWT

Topologies

Examples showcasing various deployment topologies NATS supports including clusters, superclusters, and leaf nodes.

• Simple Leafnode
• Leafnode with JWT Auth
• Supercluster
• Supercluster with JetStream
• Supercluster Arbiter

Use Cases

Cross-functional examples satisfying a use case.

• Regional and Cross Region Streams (Supercluster)
• Regional and Cross Region Streams (Cluster)

Key-Value

A layer on top of JetStream for utilizing a stream as a key-value store.

• Key-Value Intro

Object-Store

A layer on top of JetStream for utilizing a stream as an object store.

• Object-Store Intro

Embedded

The NATS server can be embedded in the Go language.

• Mutual TLS

Integrations

Examples of various integrations with NATS.

• Change Data Capture via Debezium

Services Framework

A layer on top of core NATS for building services in a simple and consistent way.

• Intro

Operations

• NATS Streaming to JetStream Migration