Event-Driven Architecture

3.

Core Components and Roles

3.1.

Event Producers

3.1.1.

Producer Responsibilities

3.1.1.1.

Event Detection

3.1.1.2.

3.1.1.3.

Event Publishing

3.1.2.

Event Generation Strategies

3.1.2.1.

Synchronous Event Emission

3.1.2.2.

Asynchronous Event Emission

3.1.2.3.

Batch Event Processing

3.1.2.4.

Event Buffering

3.1.3.

Publishing Patterns

3.1.3.1.

Direct Publishing

3.1.3.2.

Outbox Pattern Implementation

3.1.3.3.

Transactional Publishing

3.1.4.

Producer Reliability

3.1.4.1.

Delivery Guarantees

3.1.4.2.

Retry Mechanisms

3.1.4.3.

3.2.

Event Consumers

3.2.1.

Consumer Responsibilities

3.2.1.1.

Event Subscription

3.2.1.2.

Event Processing

3.2.1.3.

State Management

3.2.2.

Subscription Models

3.2.2.1.

Push-Based Subscriptions

3.2.2.2.

Pull-Based Subscriptions

3.2.2.3.

Hybrid Approaches

3.2.3.

Event Processing Patterns

3.2.3.1.

Stateless Processing

3.2.3.2.

Stateful Processing

3.2.3.3.

Stream Processing

3.2.3.4.

Batch Processing

3.2.4.

Consumer Groups

3.2.4.1.

3.2.4.2.

Partition Assignment

3.2.4.3.

Consumer Coordination

3.2.5.

Error Handling in Consumers

3.2.5.1.

Retry Strategies

3.2.5.2.

Dead Letter Handling

3.2.5.3.

Circuit Breaker Implementation

3.3.

Event Channels and Brokers

3.3.1.

3.3.1.1.

3.3.1.2.

3.3.1.3.

3.3.1.4.

3.3.2.

Message Routing

3.3.2.1.

Content-Based Routing

3.3.2.2.

Header-Based Routing

3.3.2.3.

Topic-Based Routing

3.3.3.

Delivery Semantics

3.3.3.1.

At-Most-Once Delivery

3.3.3.2.

At-Least-Once Delivery

3.3.3.3.

Exactly-Once Delivery

3.3.4.

Buffering and Persistence

3.3.4.1.

Message Durability

3.3.4.2.

Retention Policies

3.3.4.3.

Storage Management

3.3.5.

Quality of Service

3.3.5.1.

Message Ordering

3.3.5.2.

Delivery Guarantees

3.3.5.3.

Performance Characteristics

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4. Architectural Patterns and Topologies