Akka and Distributed Systems

5.

Actor Communication

5.1.

Message Passing Fundamentals

5.1.1.

Message Delivery Semantics

5.1.1.1.

At-Most-Once Delivery

5.1.1.2.

Delivery Guarantees

5.1.1.3.

Message Loss Scenarios

5.1.2.

Message Ordering

5.1.2.1.

Per-Sender Ordering Guarantees

5.1.2.2.

Global Ordering Limitations

5.1.2.3.

Causal Ordering

5.2.

Communication Patterns

5.2.1.

Tell Pattern (Fire-and-Forget)

5.2.1.1.

Asynchronous Messaging

5.2.1.2.

Use Cases and Benefits

5.2.1.3.

Error Handling Limitations

5.2.2.

Ask Pattern (Request-Response)

5.2.2.1.

Future-Based Responses

5.2.2.2.

Timeout Configuration

5.2.2.3.

5.2.2.4.

Performance Considerations

5.2.3.

Message Forwarding

5.2.3.1.

Preserving Original Sender

5.2.3.2.

Chain of Responsibility

5.2.3.3.

Use Cases and Patterns

5.2.4.

5.2.4.1.

5.2.4.2.

Callback Patterns

5.2.4.3.

Correlation IDs

5.3.

5.3.1.

Message Immutability

5.3.1.1.

Importance for Thread Safety

5.3.1.2.

Immutable Data Structures

5.3.1.3.

Defensive Copying

5.3.2.

Message Protocols

5.3.2.1.

Protocol Design Principles

5.3.2.2.

Message Versioning

5.3.2.3.

Protocol Evolution

5.3.3.

Message Serialization

5.3.3.1.

Serialization Requirements

5.3.3.2.

Performance Considerations

5.3.3.3.

Common Serialization Formats

5.3.3.3.1.

Java Serialization

5.3.3.3.2.

Protocol Buffers

5.3.3.3.3.

5.3.3.3.4.

5.3.3.4.

Custom Serializers

5.4.

Advanced Communication

5.4.1.

Message Routing

5.4.2.

Message Transformation

5.4.3.

Message Filtering

5.4.4.

Publish-Subscribe Patterns

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6. Actor Lifecycle and Supervision