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Actors
Actors
Creating Actors
UntypedActor API
Identifying Actors via Actor Selection
Messages and immutability
Send messages
Receive messages
Reply to messages
Receive timeout
Stopping actors
HotSwap
Stash
Killing an Actor
Actors and exceptions
Initialization patterns
Typed Actors
When to use Typed Actors
The tools of the trade
Creating Typed Actors
Method dispatch semantics
Messages and immutability
Stopping Typed Actors
Typed Actor Hierarchies
Supervisor Strategy
Receive arbitrary messages
Lifecycle callbacks
Proxying
Lookup & Remoting
Typed Router pattern
Fault Tolerance
Fault Handling in Practice
Creating a Supervisor Strategy
Supervision of Top-Level Actors
Test Application
Dispatchers
Default dispatcher
Looking up a Dispatcher
Setting the dispatcher for an Actor
Types of dispatchers
Mailboxes
Mailbox Selection
Builtin Mailbox Implementations
Mailbox configuration examples
Creating your own Mailbox type
Special Semantics of
system.actorOf
Routing
A Simple Router
A Router Actor
Router usage
Specially Handled Messages
Dynamically Resizable Pool
How Routing is Designed within Akka
Custom Router
Configuring Dispatchers
Building Finite State Machine Actors
Overview
How State should be Handled
Message Buncher Example
State-Centric vs. Event-Centric
Persistence
Dependencies
Architecture
Event sourcing
Persistent Views
Snapshots
At-Least-Once Delivery
Event Adapters
Storage plugins
Pre-packaged plugins
Custom serialization
Testing
Configuration
Multiple persistence plugin configurations
Persistence - Schema Evolution
Schema evolution in event-sourced systems
Picking the right serialization format
Schema evolution in action
Persistence Query
Dependencies
Design overview
Read Journals
Performance and denormalization
Query plugins
Persistence Query for LevelDB
Dependencies
How to get the ReadJournal
Supported Queries
Configuration
Testing Actor Systems
Synchronous Unit Testing with
TestActorRef
Asynchronous Integration Testing with
JavaTestKit
CallingThreadDispatcher
Tracing Actor Invocations
Configuration
Contents
