synchronization

github sync from fork

由 ℡╲_俬逩灬. 提交于 2019-12-08 05:58:00
问题 I am pretty new to github. I made a fork from a third party, then I modified several files in this fork and committed to my fork. Based on my fork, I made a branch. I noted there are some update in upstream (the third party source which I made the fork), so I sync my fork. Now how do I push the changes from my fork to my branch ? Another situation is after I made some changes in my branch, how do I push them back to my fork? 回答1: You need to do a: git request-pull original_repo <repo_url>

Help me to understand JSF managed bean scope from concurrency view

由 ╄→尐↘猪︶ㄣ 提交于 2019-12-08 05:40:02
问题 Can anyone help me to understand the JSF managed bean scope from a concurrency perspective ? My Understanding: Once i have a bean scoped in a session scope that's mean : there is only one user can access this managed bean so there is no possibility to concurrency occur. Also, once i use a bean in a request scope then this bean will be created once a request had initiated and that bean will be removed once a response returned. (each clients have different copy of this bean) Also, once i use a

Email Monitor Synchronization

由 半世苍凉 提交于 2019-12-08 04:57:13
问题 I'm writing a C# program that monitors a dedicated Gmail account using POP3 for specialized command emails and reacts appropriately. For maximum reliability, I will run this program on several computers throughout the country. I currently have a race condition where two instances of the program can read the same message before one of them deletes it, causing the message to be processed twice. How can I make sure that each command is processed exactly once? Gmail's POP3 access used to only

ping pong behaviour using deffered

由 安稳与你 提交于 2019-12-08 04:52:48
问题 I have created following javascript code: var index, _i; var dfd = new $.Deferred(); dfd.resolve(); for (index = _i = 0; _i < 10; index = ++_i) { $.when($, dfd).done(function() { console.log('ping'); promise = (function(index) { setTimeout(function() { console.log('pong'); dfd.resolve(); }, 3000); dfd.reject(); })(index); }) } in console I see following result ping ping ping ping ping ping ping ping ping ping pong pong pong pong pong pong pong pong pong pong But I want to achieve ping pong

Java synchronized method does not work as expected

由 雨燕双飞 提交于 2019-12-08 04:26:58
问题 I did some research but I couldn't find right answer I guess. public class MultiThreadTwo { private int count = 0; public synchronized void increment() // I synchronized it here { count++; } public static void main (String [] args) { MultiThreadTwo app = new MultiThreadTwo(); app.doWork(); } public void doWork() { Thread t1 = new Thread(new Runnable() { public void run(){ for (int i=0;i<100;i++ ) { increment(); // increments } } }); Thread t2 = new Thread(new Runnable() { public void run() {

ping pong behaviour using deffered

由 一笑奈何 提交于 2019-12-08 04:19:28
I have created following javascript code: var index, _i; var dfd = new $.Deferred(); dfd.resolve(); for (index = _i = 0; _i < 10; index = ++_i) { $.when($, dfd).done(function() { console.log('ping'); promise = (function(index) { setTimeout(function() { console.log('pong'); dfd.resolve(); }, 3000); dfd.reject(); })(index); }) } in console I see following result ping ping ping ping ping ping ping ping ping ping pong pong pong pong pong pong pong pong pong pong But I want to achieve ping pong ping pong .... Where do I wrong and how to rewrite code acording my desired behavour? Here's a way to do

Deadlock when synchronizing two simple python3 scripts using 0mq (ZeroMQ)

由 自闭症网瘾萝莉.ら 提交于 2019-12-08 04:18:56
问题 I get this strange deadlock when I try to synchronize two python3 scripts using 0mq ( ZeroMQ ). The scripts run fine for several thousand iterations, but sooner or later they both stop and wait for each other. I am running both scripts from different CMD-Windows on Windows 7. I cannot figure out why such a deadlock is even possible . What can go wrong here? Script A: while (1): context = zmq.Context() socket = context.socket(zmq.REP) socket.bind('tcp://127.0.0.1:10001') msg = socket.recv() #

How to sync a particular table with same name and database name between two different independent networks where replication is not possible?

由 青春壹個敷衍的年華 提交于 2019-12-08 04:16:03
问题 pt-table-sync and pt-table-checksum still require the target and destination DBs to be in the same network. Is there an alternative, apart from import/export, replication, and pt-table-sync? MySQL Version is 5.5 and above. 回答1: As root: mysqldump db table | mysql -h1.2.3.4 -uuser -password db If permission is denied, this should work in the remote database: GRANT ALL ON *.* TO 'user'@'server1' IDENTIFIED BY 'password'; Automate using crontab or simply use a specialized tool like pt-table-sync

Oozie > what is the difference between asynchronous actions and synchronous actions

由 末鹿安然 提交于 2019-12-08 02:23:44
问题 I read from Oozie official site: Actions Are Asynchronous All computation/processing tasks triggered by an action node are executed asynchronously by Oozie. For most types of computation/processing tasks triggered by workflow action, the workflow job has to wait until the computation/processing task completes before transitioning to the following node in the workflow . Whereas on different page of the same site: Fs HDFS action The introduction of FS action (synchronous action) told that: The

How to correctly implement triple buffering?

由 早过忘川 提交于 2019-12-08 02:21:47
问题 I am trying to simulate videocard (producer thread) and a monitor(consumer thread), to figure out what is going on in educational purposes. So here is the technical task description: Producer thread produces frames pixel data at 1000 fps. Consumer thread runs at 60 fps and every frame it must have access to last produced frame for at least 1/60th of second. Each frame is represented by some int* , for simplicity. So my solution is that i have array of 2 pointers: one for producer, one for
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