actor

I have made my Actor , but I am unclear on how to take advantage of the action and act methods. Outside of the basic Javadoc, I have not found a good tutorials on these methods. Can anyone provide an example with comments for actions on actors? Ludevik This answer is being rendered obsolete because of changes in LibGDX. For up to date documentation see scene2d wiki page . There are various available actions in LibGDX ready for you. They are in com.badlogic.gdx.scenes.scene2d.actions package. I would say that there are 3 kinds of actions: Animation actions Composite actions Other actions

I'm trying to find the 'right' actor implementation. I realized there is a bunch of them and it's a bit confusing to pick one. Personally I'm especially interested in remote actors, but I guess a complete overview would be helpful to many others. This is a pretty general question, so feel free to answer just for the implementation you know about. I know about the following Scala Actor implementations (SAI). Please add the missing ones. Scala 2.7 (difference to) Scala 2.8 Akka ( http://www.akkasource.org/ ) Lift ( http://liftweb.net/ ) Scalaz ( http://code.google.com/p/scalaz/ ) What are the

Let me first say that I have quite a lot of Java experience, but have only recently become interested in functional languages. Recently I've started looking at Scala, which seems like a very nice language. However, I've been reading about Scala's Actor framework in Programming in Scala , and there's one thing I don't understand. In chapter 30.4 it says that using react instead of receive makes it possible to re-use threads, which is good for performance, since threads are expensive in the JVM. Does this mean that, as long as I remember to call react instead of receive , I can start as many

Is there any good and short explanation of how Actors works compared to threads? Can't a thread be seen as an actor and send messages to other threads? I see some difference, but it's not that clear for me. Can I use Actors in any language by using threads differently? Rob Lachlan The actor model operates on message passing. Individual processes (actors) are allowed to send messages asynchronously to each other. What distinguishes this from what we normally think of as the threading model, is that there is (in theory at least) no shared state. And if one believes (justifiably, I think) that

With the release of Scala 2.9.0, the Typesafe Stack was also announced, which combines the Scala language with the Akka framework. Now, though Scala has actors in its standard library, Akka uses its own implementation. And, if we look for other implementations, we'll also find that Lift and Scalaz have implementations too! So, what is the difference between these implementations? Daniel C. Sobral This answer isn't really mine. It was produced by Viktor Klang (of Akka fame) with the help of David Pollak (of Lift fame), Jason Zaugg (of Scalaz fame), Philipp Haller (of Scala Actors fame). All I'm

I feel a bit insecure about using actors in Scala. I have read documentation about how to do stuff, but I guess I would also need some DON'T rules in order to feel free to use them. I think I am afraid that I will use them in a wrong way, and I will not even notice it. Can you think of something, that, if applied, would result in breaking the benefits that Scala actors bring, or even erroneous results? oxbow_lakes Avoid !? wherever possible. You will get a locked system! Always send a message from an Actor-subsystem thread. If this means creating a transient Actor via the Actor.actor method

基于mysql5.7,innodb存储引擎 使用explain关键字可以模拟优化器执行SQL语句，分析你的查询语句或是结构的性能瓶颈 在 select 语句之前增加 explain 关键字，MySQL 会在查询上设置一个标记，执行查询会返 回执行计划的信息，而不是执行这条SQL ，如果 from 中包含子查询，仍会执行该子查询，将结果放入临时表中 使用到的建表语句文末 explain select * from actor; 在查询中的每个表会输出一行，如果有两个表通过 join 连接查询，那么会输出两行 explain结果字段说明 1. id列 id列的编号是 select 的序列号，有几个 select 就有几个id，并且id的顺序是按 select 出现的 顺序增长的。 id列越大执行优先级越高，id相同则从上往下执行，id为NULL最后执行。 2. select_type列 select_type 表示对应行是简单还是复杂的查询。 1）simple：简单查询。查询不包含子查询和union 2）primary：复杂查询中最外层的 select 3）subquery：包含在 select 中的子查询（不在 from 子句中） 4）derived：包含在 from 子句中的子查询。MySQL会将结果存放在一个临时表中，也称为 派生表（derived的英文含义） 5）union：在

How to implement simple actors without Akka? I don't need high-performance for many (non-fixed count) actor instances, green-threads, IoC (lifecycle, Props-based factories, ActorRef's), supervising, backpressure etc. Need only sequentiality (queue) + handler + state + message passing. As a side-effect I actually need small actor-based pipeline (with recursive links) + some parallell actors to optimize the DSP algorithm calculation. It will be inside library without transitive dependencies, so I don't want (and can't as it's a jar-plugin) to push user to create and pass akkaSystem , the library