state-machine

问题 I've written a high-throughput server that handles each request in its own thread. For requests coming in it is occasionally necessary to do RPCs to one or more back-ends. These back-end RPCs are handled by a separate queue and thread-pool, which provides some bounding on the number of threads created and the maximum number of connections to the back-end (it does some caching to reuse clients and save the overhead of constantly creating connections). Having done all this, though, I'm

问题 In REST - revertable DELETE a nice introduction on howto model state changes in REST was given. Basically, if you have a resource with a field status , you just put a new version of that resource with an update status field. In this topic, I would like to extend this model. Say you have a resource which can be in two states: 1 and 2. In contrast with the simple model as described in the cited post, there are three transitions to traverse from state 1 to state 2, instead of just one. My

问题 I am trying to create a simple finite state machine in C and I'm quite confused on how to get started. I tried looking online but nothing has really cleared this up for me. My goal is to check if a string is octal, hex or a decimal. To be octal the string must start with a 0, followed by digits 0-7. To be hex the string must start with 0x or OX, followed by (a-f, A-F, 0-9) My attempt at creating the states would be: typedef enum { ERROR, OCTAL, HEX, DECIMAL } stringStates; Now, I would then

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I am looking for a relatively simple state machine plugin for a Rails 3 / Active Record project. I've done a little research and come up with the following plugins: Transitions : https://github.com/qoobaa/transitions Extracted from old Active Record State Machine Library Acts_As_State_Machine : https://github

问题 I'm looking for a tool that understands a DSL in which I can define my statechart that generates Java code or where the statechart in the DSL is runnable as is. The tool would ideally be written in Java and must support superstates and orthogonal regions by definition of Harel Statecharts (or equivalently UML 2 State Machines). Alternatively, what would be the best library or tool to write such a DSL with? 回答1: Yakindu looks good: http://www.statecharts.org Harel Statecharts Visual Language

问题 I want to ask regarding the meaning of 3-state phone model in HMM. This case is based on the theory of HMM in speech recognition system. So the example is based on the acoustic modeling of the speech sounds in HMM. I get this example picture from a journal paper: http://www.intechopen.com/source/html/41188/media/image8_w.jpg Figure 1: 3-State HMM for the sound /s/ So, my question is: what is it mean by 3 state? what actually S1, S2 & S3 mean? (I know it is state but it represent what?) How to

问题 Recommendations for languages with native (so no FSM generation tools) support for state machine development and execution and passing of messages/signals. This is for telecoms, e.g implementation of FSMs of this level of complexity. I have considered Erlang, but would love some feedback, suggestions, pointer to tutorials, alternatives, particularly Java based frameworks. Maybe Scala? Open source only. I'm not looking for UML or regular expression related solutions. As this is for the

问题 Is it possible to send variables in the the transition? i.e. @car.crash!(:crashed_by => current_user) I have callbacks in my model but I need to send them the user who instigated the transition after_crash do |car, transition| # Log the car crashers name end I can't access current_user because I'm in the Model and not the Controller/View. And before you say it... I know I know. Don't try to access session variables in the model I get it. However, whenever you wish to create a callback that

问题 I've read the "Create Multi-Step Wizard" in Advanced Rails Recipes. I've also read and re-read the documentation for the updated FSM I'm using called Workflow, and looked here and here. The Advanced Rails Recipe focuses on records (quizzes) that already exist, and doesn't cover creating new ones. The Workflow docs don't cover any code for controllers or views, so I've no idea what to do with all this model magic, and the last two links barely touch on implementation either. From the

问题 I am currently learning java and would like to know how to control state in a OO way. I implemented a Pong app. If I wanted multiple states like gameplay and menu, and each one of these states had to execute start, stop and run how would I achieve this and how would I switch between these states. I know I could simply throw in a big switch statement but what's the best way to implement this? I want to be able to switch to the menu state in the gameplay state and vice versa. import java.applet