Actor | safe Actor class and WiredActor for sending functions
kandi X-RAY | Actor Summary
kandi X-RAY | Actor Summary
Actor - A small type-safe class that implements the most commonly used Actor APIs including ask (?) which returns a typed Future[R]. WiredActor - Convert any object to an Actor that allows invoking the object's function as messages.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Actor
Actor Key Features
Actor Examples and Code Snippets
Lines of Code : 21License : Permissive (MIT License)
Copydef __init__(
self,
position_x: float,
position_y: float,
velocity_x: float,
velocity_y: float,
mass: float = 1.0,
size: float = 1.0,
color: str = "blue",
) -> None:
"""
@PutMapping("/actor/{id}/{name}")
public String updateActorName(@PathVariable("id") int id, @PathVariable("name") String name) {
try {
return actorService.updateActor(id, name);
} catch (ActorNotFoundException ex) {
public String updateActor(int index, String actorName) throws ActorNotFoundException {
if (index >= actors.size()) {
throw new ActorNotFoundException("Actor Not Found in Repsoitory");
}
actors.set(index, actorNa Community Discussions
Trending Discussions on Actor
QUESTION
I am currently creating class diagrams in UML for a movie test domain. I would like to know if I am doing it right. Well, I have two alternatives (the first version in the first picture, the second in the second - I think the first one is better). I'm wondering if I've established the so-called "relationship owner" correctly, that is, from which class to which direction the relationships go. I also don't know if I didn't get multiplicity wrong (one to one, one to many etc.).
So on my domain I would like to have movies of course, the actors starring in those movies and directors. I wonder if the class name "Character" is good in this case, because I mean all the characters that take part in a movie - it can be director, actor but also for example "Batman". Maybe I should make a distinction here between "Movie Character" and then "Human", "Monster", whatever. But I don't know how to do it elegantly, will I then inherit from the Character class? I'm also wondering if I shouldn't put classes like City or Country together in one class called Address - but I wanted the classes to take attributes like in this case, that one is Master and the other is detail - and the relationship set in the right direction. I use only relations such as Inheritance and Dependency, I do not know if I should change something in this case.
Version 1
Version 2
Thanks in advance for any suggestions or advice!
...ANSWER
Answered 2021-Jun-15 at 11:58Use inheritance very carefully. Prefer association over inheritance whenever your inheritance is not a permanent truth from the birth to the death of an object. ANd keep in mind that dependencies between classes do not make any promises about objects of those classes.
Some more explanationsSome clarifications on the UML syntax:
- I understand that your plain thick lines ended with a small hollow triangle represent a specialization/generalization relationship (aka inheritance). If this is correct, the triangle should be larger to avoid visual confusion. Moreover multiplicity makes no sense with inheritance and should be removed.
- I understand that with the dotted line you intend to represent an association with multiplicity. If this is correct:
- the association should be plain lines, because dotted lines are for dependencies, and multiplicity would make no sense.
- the meaning you give to the arrow head would be unclear. Do you use them to document navigability? In case of doubt, remove them. If you want to document ownership of the association end, use the dot notation instead. (we cannot say if it’s right or wrong, since it’s a decision on how your model sees the associations)
In view of your comments and the third model linked therein, there are some key UML semantics you need to keep in mind:
- Inheritance is an ultra-strong relationship which means "is (always) a". In your example, you may say that an
Actoris always aPerson, and hence, everything you say about aPersonis also true for anActor. By the way, you should avoid repeating inherited properties or methods, since it could create some ambiguity. - Inheritance is not a substitute for aggregation, composition or association. You can for example not say that a
CrewMember(one person) is always aCrew(a group of persons). ACrewMemberbelongs to aCrewbut there are things that the crew can do together that the individual member can't. - Inheritance is not suitable if it's not always true. A
Characterfor example may often be aPerson. But not always;: you can have ghost characters, comic characters, robot characters, or animals. - Association means that there is some structural relation between some instances of the associated classes. For example, that one ore several persons live in one city, seems a very relevant assocaition.
- Dependency means that a class is dependent on another, i.e. without the other class it would not work or something would be missing. It's a statement about the classes and not the objects. I.e. If you meant to say that
Personis dependent onCityyou just say that the class Person would not work without knowing about City (for example, because the operationsendPostCardFrom(city: City)needs an argument of that type) but you do not say anything about persons X, Y and Z. If you want that X, Y and Z are related to city a, b, and c, you need an association.
About the model content, I'll not decide for you and there is no single truth. I therefore prefer to draw your attention at potential issues. I raise them in form of a question, up-to you to adjust the model based on your own answer:
Common issues between the both variants:
- Are
ActorandDirectorreallyPersons? In this case, what with the Persons that are Actors and Directors at the same time (g.g. Clint Eastwood) ? Or areActorandDirectorjust roles that aPersonstakes for a givenMovie? - Is a
Characterreally related only to 1Movie? What to do with Indiana Jones, where the same character appears in several movies? - In a similar way, I wonder if there's really a single
Personwho lives in aCityor if this should not be a many-to-many association?
- Are
Issues regarding the differences: `
- Is a
Personin version 1 aCharacter(inheritance) ? Or is aCharactera representation of aPerson(association: represents) ? - Is a
Characterin version 2 really anActorand by transitivity also aPerson(inheritance)? Or is theCharacteronly associated with anActor(association: plays) ?
- Is a
It's up to you to decide, but wherever I asked a question about association or inheritance, you should better think twice before using inheritance (i.e. prefer association/composition over inheritance)
QUESTION
Using below code I'm attempting to use an actor as a source and send messages of type Double to be processed via a sliding window.
The sliding windows is defined as sliding(2, 2) to calculate each sequence of twp values sent.
Sending the message:
...ANSWER
Answered 2021-Jun-14 at 11:39The short answer is that your source is a recipe of sorts for materializing a Source and each materialization ends up being a different source.
In your code, source.to(Sink.foreach(System.out::println)).run(system) is one stream with the materialized actorRef being only connected to this stream, and
QUESTION
While deleting and adding works fine, when I update the Parent collection of child entities, the foreign keys on child records are simply set to null. I'd like them to be completely removed from the database.
So I've been trying Cascade.All, Cascade.DeleteOrphans, Cascade.All.Include(Cascade.DeleteOrphans) and nothing seems to work.
If I set Inverse to true on the parent but it causes the child records to not get updated at all.
Here's my code:
Parent class mapping ...ANSWER
Answered 2021-Jun-14 at 15:43Changing Update() to Merge() worked for me.
QUESTION
Is there away to run scheduled background job on stateful service in azure service fabric ? the only way I found only was timers & reminders which they run on Actors not stateful service. I'm trying to run scheduled background job to clean up some data in Reliable dictionary.
...ANSWER
Answered 2021-Jun-14 at 08:15The recommended way to run background jobs in Service Fabric is to simply override the RunAsync operation. This works equally fine for stateful and stateless services - although, as already mentioned, Actors provide some additional functionality with its built in support for reminders and timers.
Below is a very basic example
QUESTION
These codes convert uppercase letters ("letters only") to lowercase letters and lowercase letters to uppercase. My question is that I want to print them as well and keep them unchanged, if any (non-verbal symbols and actors). With the cmp and ... commands that you see in the program
...ANSWER
Answered 2021-Jun-13 at 16:03You need to restrict the ranges for the uppercase and lowercase characters by specifying a lower limit and a higher limit, not just the one value (96) that your current code uses.
Uppercase characters [A,Z] are in [65,90]
Lowercase characters [a,z] are in [97,122]
The nice thing of course is that you don't actually need to write these numbers in your code. You can just write the relevant characters and the assembler will substitute them for you:
QUESTION
We do use .to_yaml on ActiveRecord to dump some values of a record in to a .yml file for backup reasons.
Those files are stored into a repository as those backup data is part of defaults for setup new systems.
Example:
...ANSWER
Answered 2021-Jun-11 at 15:11The issue is with lines that include only spaces.
These will format how you want:
QUESTION
I'd like to create a regex that would be able to grab everything up to and after DESCRIPTION, until the next TITLE: is found.
...ANSWER
Answered 2021-Jun-11 at 01:07/(?=TITLE: )/g seems like a reasonable start. I'm not sure if the gutter of 2 characters whitespace is in your original text or not, but adding ^ or ^ to the front of the lookahead is nice to better avoid false-positives, i.e. /(?=^TITLE: )/mg, /(?=^ TITLE: )/mg or /(?=^ *TITLE: )/mg.
QUESTION
I recently saw that Swift had introduced concurrency support with the Actor model in Swift 5.5. This model enables safe concurrent code to avoid data races when we have a shared, mutable state.
I want to avoid main thread data races in my app's UI. For this, I am wrapping DispatchQueue.main.async at the call site wherever I set a UIImageView.image property or a UIButton style.
ANSWER
Answered 2021-Jun-10 at 15:19Actor isolation and re-entrancy is now implemented in the Swift stdlib. So, Apple recommends using the model for concurrent logic with many new concurrency features to avoid data races. Instead of lock-based synchronisation (lots of boilerplate), we now have a much cleaner alternative. There are a couple of solutions here (see below).
Solution 1The simplest possible. Apple have made the process much cleaner using the @MainActor method annotation:
QUESTION
I am training a DDPG agent on my custom environment that I wrote using openai gym. I am getting error during training the model.
When I search for a solution on web, I found that some people who faced similar issue were able to resolve it by initializing the variable.
...ANSWER
Answered 2021-Jun-10 at 07:00For now I was able to solve this error by replacing the imports from keras with imports from tensorflow.keras, although I don't know why keras itseld doesn't work
QUESTION
In Movie.hpp
...ANSWER
Answered 2021-Jun-09 at 22:15I'll employ some database theory here.
Each movie will have a unique ID and a title:
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