polling

问题 I would like to access Matlab from Python (on Windows, remotely and via COM-interface). My goal is: Matlab is doing some work and permanently changes the value of a certain variable. I need to know when the value exceeds some constant. Right now, I'm polling Matlab for the value of that variable in an indefinite loop which breaks on exceeding the value. However, I would like to let Matlab do the work and tell me when that is the case, while I'm lazily sitting there listening. Is there a way

问题 I would like some advice on how to implement the following: I would like to make my users aware of the progress of a task that is running on my server via AJAX. My server runs a PHP script that downloads a file via shell command using the popen function. It periodically echos/prints what is happening. I would like to capture this output using AJAX and present it to the user. I was told in another question that I might need to make use of polling or comet? I would really appreciate any help or

问题 I have a J2ME app running on my mobile phone(client), I would like to open an HTTP connection with the server and keep polling for updated information on the server. Every poll performed will use up GPRS bytes and would turn out expensive in the long run, as GPRS billing is based on packets sent and received. Is there a byte efficient way of polling using the HTTP protocol?. I have also heard of long polling, But I am not sure how it works and how efficient it would be. Actually the preffered

问题 I'm implementing a socket-client which opens several sockets at the same time. Any socket may have data at a different time and I want to execute code when any socket has data and is readable. I'm not sure how to implement this, I was looking at select.select but it seems to wait for all the sockets to be readable. I'd like to avoid using multiprocessing to handle data on the sockets, I would like it to be serial in reading from each socket but read when there is data available. How do I wait

问题 From the OSDev page on the A20 line, the code for enabling A20 is given as: enable_A20: cli call a20wait mov al,0xAD out 0x64,al call a20wait mov al,0xD0 out 0x64,al call a20wait2 in al,0x60 push eax call a20wait mov al,0xD1 out 0x64,al call a20wait pop eax or al,2 out 0x60,al call a20wait mov al,0xAE out 0x64,al call a20wait sti ret a20wait: in al,0x64 test al,2 jnz a20wait ret a20wait2: in al,0x64 test al,1 jz a20wait2 ret a20wait waits on the input buffer and a20wait2 on the output buffer.

问题 We are implementing server side receipt validation for auto renewable subscription. Now when a user turn off the subscription or when it auto renew there is no notification send from apple server to our server. We want to poll apple server when the subscription is about to expire. So how can we do this? Is there a way to schedule such polling at specific date ? 回答1: First when any in app purchase made you need to store receipt data after validating it. Also you need to store expire date of

问题 I want to implement a system where my 'show' view, every 10 seconds will call update in the controller, then asynchronously updates the view without refreshing the page. I have it at the point where it updates asynchronously. However I need to get it polling. My approach is: controller show action responds with JS def show @simulation = Simulation.find(params[:id]) end Then JS that does somthing like this.. ` // starts the polling on page load $(function() { setTimeout(callUpdate, 10000); });

问题 I'm using PrimeFaces poll component to refresh some content. <h:form id="formBsvtt"> <p:messages autoUpdate="true" showDetail="false" /> <p:outputPanel id="panelOut" layout="block"> ... ... content to refresh ... </p:outputPanel> <p:panelGrid id="panelIn" layout="block"> ... ... various input components with validation ... </p:panelGrid> <p:poll widgetVar="poll1" autoStart="true" global="false" interval="15" partialSubmit="true" process="@this" update="panelOut" listener="#{myBean.myListener}

问题 I'm developing a Windows Form application which runs on a cloud SQL service hosted by the Microsoft Azure development services. Without having the ability to physically have a receiving application which would allow me to utilize sockets which is an essential pitfall as my application would rely heavily on a dedicated database, so i'd prefer to have the ability to constantly check the database for changes and alert the current user based on row entries which match criteria. I've read on a few

问题 Running session_write_close() before sleep() in Laravel doesn't seem to be functioning as the session is still blocked from other requests until the current connection is complete. I'm trying to sleep() in Laravel without blocking other requests. Found out that session_write_close() should resolve the problem as mentioned here: Long polling in Laravel (sleep() function make application freeze). But it doesn't work. sleep() is still blocking other requests. The project app is a chat app using