So i'm working on a project where there is data visualization. My ultimate goal is that i have a set of data shipped with the download of the iphone app. But i want it connected to a backend, that if the iphone has a connection with the internet. it can sync the changes from the backend. The syncing is no problem or the connection betw...
I have two threads in c#.. Now i need to wait for a particular statement to be executed before I can continue execution in the other thread which obviously is a case of synchronisation. Is there any code that can carry this out as in using an in-built method? OK guys.. This is the code example: public void StartAccept() { ...
I was debugging a multi-threaded application and found the internal structure of CRITICAL_SECTION. I found data member LockSemaphore of CRITICAL_SECTION an interesting one. It looks like LockSemaphore is an auto-reset event (not a semaphore as the name suggests) and operating system creates this event silently when first time a thread ...
I have a Windows Form application built on a data model and a Windows Mobile application which contains a similar data model. When users enter information in the mobile application I sync it with the data in the main application. This is achieved by essentially having the class defintions used in the mobile application in the main appl...
I just realized that I need to synchronize a significant amount of data collection code in an aspect but performance is a real concern. If performance degrades too much my tool will be thrown out. I will be writing ints and longs individually and to various arrays, ArrayLists and Maps. There will be multiple threads of an application tha...
I have two threads and I want the second thread to wait until first thread finishes. How can I accomplish this? This my code: public class NewClass1 implements Runnable { // in main CallMatlab c = new CallMatlab(); CUI m = new CUI(); Thread t1 = new Thread(c); t1.start(); Thread t2 = new Thread(m); try { ...
What is the significance of parameter passed to synchronized? synchronized ( parameter ) { } to achieve block level synchronization. Somewhere i saw code like class test { public static final int lock =1; ... synchronized(lock){ ... } } I don't understand the purpose of this code. Can anyone give me a be...
I'm using a static code block to initialize some controllers in a regsitry I have. My question is therefore, can I guarantee that this static code block will only absolutely be called once when the class is first loaded? I understand I cannot guarantee when this code block will be called, Im guessing its when the Classloader first loads ...
If I have a multi-threaded program that reads a cache-type memory by reference. Can I change this pointer by the main thread without risking any of the other threads reading unexpected values. As I see it, if the change is atomic the other threads will either read the older value or the newer value; never random memory (or null pointers...
Hi, we have a local staging server running sql server 2000 and a remote public version also running sql server 2000. The remote version will be upgraded to 2005 and I am wondering if the DTS packages we have in place will continue to function between the two machines? If not, what would be the simplest, most efficient way to sync betwee...
I am wondering if it is possible to avoid the lost update problem, where multiple threads are updating the same date, while avoiding using synchronized(x) { }. I will be doing numerous adds and increments: val++; ary[x] += y; ary[z]++; I do not know how Java will compile these into byte code and if a thread could be interrupted in t...
I need to synchronize two sql server 2005 instances between intranet and extranet (through a firewall). Synchronization will be initiated from the intranet. What solutions do I have at my disposal? intranet db: table t1 -> extranet db: table t1 intranet db: table t2 <- extranet db: table t2 i.e. intranet t1 content should be pushed out...
I'm looking for advices and suggestions on how to synchronise data between two databases. The first database is a SQL Server 2008 Express that run on disconnected laptops (no network or internet access). The second database (main) is a VFP 9.0 that run on a server. When the user connect their laptop on the network, I want the synchroni...
Hey there, I have some code like this: doDatabaseFetch { ... @synchronized(self) { ... } } and many objects that call doDatabaseFetch as the user uses the view. My problem is, I have an operation (navigate to the next view) that also requires a database fetch. My problem is that it hits the same synchronize block and ...
Please could someone explain condition synchronization to me? Having a hard time finding an example that explains itself well enough due to rubbish lecturing material. An example would be greatly appreciated also - preferably in C# Kind regards ...
Is there a possible way to synchronize events in javascript? My situation is following: I have a input form with many fields, each of them has a onchange event registered. there is also a button to open a popup for some other/special things to do in there. My requirement is, that the onchange event(s) are finished before I can open the...
For example, how would I write a program like senuti? Are there any libraries I can use for this? It would be ideal if I could do this in Python or .Net, but I'm open to other things as well. ...
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 th...
Is it possible to synchronize videos running in a WPF application across two or more computers? Synchronizing several videos running on the same machine seems to work well using the ParallelTimeline class and MediaTimelines for each video instance, but I haven’t figure out a way to do this across different computers, which if possible, w...
Hello everyone. I'm creating a p2p audio-midi streaming application using Java (unfortunately) and I'm searching for a way to provide network time synchronization between certain peers (sources) using a reliable protocol implementation (like NTP) but I can't find any related libraries to use.I also have a limited amount of time to spend ...