polling

How to fully implement server-sent events for message polling

由 拈花ヽ惹草 提交于 2019-12-10 16:35:40
问题 I am trying to communicate with a server using an API. to make it easier I wrote a script that will communicate the API using a php script. My goal is to make a query to the API every second to see if there is new message in their queue. I was advised to use server-sent events method and have the server send a respond to the client only when it has something new. Here is my php script <?php // Register autoloader function spl_autoload_register('apiAutoloader'); header("Content-Type: text

Longpolling vs Websockets [closed]

由 别等时光非礼了梦想. 提交于 2019-12-10 13:18:53
问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 3 years ago . I start developing a software, app coded using html + js I need to send this app notification from the server (java code) the app using nginx for routiong and is hosted in AWS. I investigated this subject of real time notification and I get confused between web sockets to

Spring integration move file after processing

由 痞子三分冷 提交于 2019-12-09 22:36:48
问题 How to move a file after processing in spring integration after processing file ..? I have followed http://xpadro.blogspot.com/2016/07/spring-integration-polling-file.html to implement the file polling , but I need to add onSuccess and OnError transnational events (with out XML configurations) 回答1: I am not sure what you mean by "transaction", file systems are generally not transactional, but you can add an advice to the final consumer in the flow... @SpringBootApplication public class

iOS: PUSH Notifications As A “Trigger” for Webservice Polling?

由 ♀尐吖头ヾ 提交于 2019-12-09 15:55:16
问题 I'm just starting out learning OBJ-C but I do have an end-goal app that I'm working toward building; this app will be a master/detail app on the iPad that will be required to keep itself updated with a webservice in "real time". It will also need to send data to the remote MySQL DB when one of the multiple users (on separate iPad's) performs certain actions within the app. EDIT: As lxt has so helpfully clarified: ""Is it appropriate to use push notifications as a cue to poll a webservice" -

Reliable way of monitoring file changes in a directory using the .NET framework

由 自作多情 提交于 2019-12-09 13:11:39
问题 I'm looking for a reliable way of looking for changes in a directory. I have tried using the FileSystemWatcher, but it's rather inaccurate when many small files are created, changed or deleted. It misses about 1 or 2 % of the files in my tests. That is quite a lot when you are adding or changing thousands of files rapidly. I have tried polling for changes at different intervals 500 ms, 2000 ms etc. In this case I get too many hits. That might have something to do with the resolution of

How do I JSON.parse an array in a Zapier Trigger?

由 淺唱寂寞╮ 提交于 2019-12-09 06:55:02
问题 I am trying to JSON.parse the array "data." I need to be able to pass the array as the root. { "data": [ { "type": "name", "id": "123" } ] } The response should look like this containing only objects. Zapier doesn't seem to work well with arrays. { "type": "name", "id": "123" } Shouldn't I be able to use a simple script to get the job done? EDIT: Essentially, you're going to want to override the post_poll method (https://zapier.com/developer/documentation/v2/scripting/#polling) in scripting

Why is this message not only displayed when a file is written to (using the poll C Linux function)?

由 家住魔仙堡 提交于 2019-12-09 04:30:33
问题 I was reading about poll in C programming and built an application given on the poll(2) man page. Here is the example: #include<stdio.h> #include <stropts.h> #include <poll.h> #include <fcntl.h> int main() { struct pollfd fds[2]; int timeout_msecs = -1; int ret; int i; /* Open STREAMS device. */ fds[0].fd = open("/home/jeshwanth/mywork/poll/dev0", O_RDONLY); fds[1].fd = open("/home/jeshwanth/mywork/poll/dev1", O_RDONLY); fds[0].events = POLLOUT | POLLWRBAND; fds[1].events = POLLOUT |

Consumer doesn't work in my simple producer/consumer/queue code in Java

由 此生再无相见时 提交于 2019-12-08 12:53:39
I am trying to implement a simple producer/consumer system in Java 11. Basically, I take two threads for each, plus a global queue, simply as follows: A global priority queue. The first thread, producer, runs a HTTP server, listens to incoming http messages, and upon receiving a message, pushes it as a job to the queue ( queue.size increments) The second thread, the consumer, continously peeks the queue. If there is a job ( job ! = null ), submits a HTTP request somewhere and upon successful receipt, polls it from the queue ( queue.size() decrements). The skeleton is as below: Main Class:

trigger a script when mailbox recieves mail?

由 空扰寡人 提交于 2019-12-08 10:04:33
I want to process a particular mailbox when it receives mail, I know I could have cron check every n minutes for any mail, but wondering if there's a way to "listen" for mail rather than continually polling. Try a .forward file You can pipe the message into any program or script you want, but also check if procmail can do what you want. Depending on your mail server, it may be possible to actually have any incoming message be delivered to a process. Either in a .forward or by setting up something more advanced. In exim you can setup a transport to run a command, for certain addresses. Jason

Consumer doesn't work in my simple producer/consumer/queue code in Java

由 时间秒杀一切 提交于 2019-12-08 03:58:05
问题 I am trying to implement a simple producer/consumer system in Java 11. Basically, I take two threads for each, plus a global queue, simply as follows: A global priority queue. The first thread, producer, runs a HTTP server, listens to incoming http messages, and upon receiving a message, pushes it as a job to the queue ( queue.size increments) The second thread, the consumer, continously peeks the queue. If there is a job ( job ! = null ), submits a HTTP request somewhere and upon successful
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