at:tutorial:actors
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=== Actors and Far References === | === Actors and Far References === | ||
+ | |||
+ | In AmbientTalk, | ||
+ | |||
+ | When an actor is created, it hosts a single object which is said to be the actor' | ||
+ | |||
+ | < | ||
+ | >def a := actor: { | ||
+ | def sayHello() { | ||
+ | system.println(" | ||
+ | }; | ||
+ | }; | ||
+ | >>< | ||
+ | </ | ||
+ | |||
+ | As you can see, actors are created similar to objects. The '' | ||
+ | |||
+ | So what exactly is a far reference to an object? The terminology stems from the E language: it is an object reference that refers to an object hosted by another actor. The main difference between regular object references and far references is that regular references allow direct, synchronous access to an object, while far references disallow such access. This is enforced by the kind of messages that these references can carry, as will be explained below. | ||
=== Asynchronous Message Sending === | === Asynchronous Message Sending === | ||
+ | |||
+ | AmbientTalk, | ||
+ | |||
+ | Far references, like the reference stored in the variable '' | ||
+ | |||
+ | Hence, given the example above, the method '' | ||
+ | |||
+ | < | ||
+ | > | ||
+ | >>nil | ||
+ | </ | ||
+ | |||
+ | async messages, parameter passing, futures | ||
=== Isolates === | === Isolates === | ||
+ | |||
+ | isolate stripe, by-copy, scoping rules, no external method defs | ||
=== Actor Mirrors === | === Actor Mirrors === | ||
+ | |||
+ | explain: mirror factory, message creation, message sending, install | ||
+ | |||
+ | === Nesting Actors === | ||
+ | |||
+ | lexical scoping rules for nested actors |
at/tutorial/actors.txt · Last modified: 2020/02/05 21:26 by elisag