Actor

Features

• Create actor from function/method
• Create actor from object factory
• Spawn actor with automatic/prefixed/specific name

Props

Settings

• Actor producer
• Mailbox producer
• Supervisor strategy
• Dispatcher
• Actor spawner
• Middleware

Context

Data

• Parent PID
• Self PID
• Sender PID
• Children PIDs
• Current message
• Current Actor

Features

• Respond to sender
• Stash current message pending restart
• Spawn child actor with automatic/prefixed/specific name
• Stop/restart/resume children
• Set/push/pop actor behaviors (become/unbecome)
• Watch/unwatch actors
• Receive timeout

ProcessRegistry

• Get Process by PID
• Add local Process with ID
• Remove Process by PID
• Generate next Process ID

Process

• Send user message to Process
• Send system message to Process
• Stop Process

Supervision

Directives

• Resume
• Restart
• Stop
• Escalate

Strategies

• OneForOneStrategy applies directive to failed child

PID

Features

• Holds address (nonhost or remote address) and ID
• Send user message
• Send system message
• Request
• Request future
• Stop

Future process

• Auxiliary process used to provide an awaitable future containing the response to a request

Dead letter process

• Auxiliary process used to collect messages sent to non-existing processes

Routers

• Group routers route message to a specified set of routees
• Pool routers route messages to a set of routees of a specified size, and are created/managed by the router
• Broadcast routers routes a message to all routees
• Random routers routes a message to a random routee
• Consistent-hash routers routes a message to a routee deterministically
• Round-robin routers routes messages to routees in a round-robin fashion

Consistent hash routers

• Routing is deterministic based on a hash computed by the message
• Uses a hash ring so that if a routee is unavailable, another will be chosen automatically, and when the routee is back it will be used again

Broadcast routers

• Uses a special message RouterBroadcastMessage to route messages more efficiently when the routees are remote (?)

Management messages

• Add route
• Get routees
• Remove routee

Remote

• Remote.Start() starts a remote actor server on a given address
• RemoteProcess represents an actor on a remote actor server
• Remote actors can be watched
• EndpointWriter mailbox collects batches of messages to optimize sending

protoactor docs