Akka and Distributed Systems

6.

Actor Lifecycle and Supervision

6.1.

Actor Lifecycle States

6.1.1.

Actor Creation Process

6.1.1.1.

Constructor Execution

6.1.1.2.

6.1.1.3.

Initial Behavior Setup

6.1.2.

Active Message Processing

6.1.2.1.

Message Handling Loop

6.1.2.2.

Behavior Execution

6.1.2.3.

6.1.3.

Actor Termination

6.1.3.1.

Graceful Shutdown

6.1.3.2.

6.1.3.3.

Resource Cleanup

6.1.4.

Actor Restart Process

6.1.4.1.

PreRestart Hook

6.1.4.2.

6.1.4.3.

PostRestart Hook

6.1.4.4.

Behavior Restoration

6.2.

Fault Tolerance Philosophy

6.2.1.

Let It Crash Principle

6.2.1.1.

Rationale and Benefits

6.2.1.2.

Error Isolation

6.2.1.3.

System Resilience

6.2.2.

Comparison to Defensive Programming

6.2.2.1.

Error Handling Strategies

6.2.2.2.

Resource Management

6.2.2.3.

System Complexity

6.3.

Supervision Hierarchy

6.3.1.

Parent-Child Relationships

6.3.1.1.

Actor Tree Structure

6.3.1.2.

Supervision Responsibilities

6.3.1.3.

Failure Escalation

6.3.2.

Guardian Actors

6.3.2.1.

6.3.2.2.

6.3.2.3.

System Guardian

6.3.3.

Supervision Scope

6.3.3.1.

Local Supervision

6.3.3.2.

Remote Supervision

6.3.3.3.

Cross-System Supervision

6.4.

Supervisor Strategies

6.4.1.

One-for-One Strategy

6.4.1.1.

Individual Actor Recovery

6.4.1.2.

Failure Isolation

6.4.1.3.

6.4.2.

All-for-One Strategy

6.4.2.1.

Group Recovery Scenarios

6.4.2.2.

Coordinated Restart

6.4.2.3.

6.4.3.

Supervision Directives

6.4.3.1.

Resume Directive

6.4.3.2.

Restart Directive

6.4.3.3.

6.4.3.4.

Escalate Directive

6.4.4.

Custom Supervision Strategies

6.5.

Death Watch and Monitoring

6.5.1.

Actor Termination Monitoring

6.5.1.1.

Watch Registration

6.5.1.2.

Terminated Message Handling

6.5.1.3.

Cleanup Procedures

6.5.2.

Monitoring Patterns

6.5.2.1.

Health Check Actors

6.5.2.2.

Heartbeat Mechanisms

6.5.2.3.

Circuit Breaker Patterns

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7. Advanced Actor Patterns and Behaviors