I'm implementing a small chat system for my website. The user sends a message to a PHP webpage... on the server this data is saved to a simple file. I read the file and WRITE some other message. At this point I want the php web process to display the file change to the user. So how do I listen for file change with PHP? ...
I'm using pyinotify to mirror files from a source directory to a destination directory. My code seems to be working when I execute it manually, but I'm having trouble getting accurate unit test results. I think the problem boils down to this: I have to use ThreadedNotifier in my tests, otherwise they will just hang, waiting for manual...
Does anybody know when those __sync tables are created when performing synchronization between a SQL Server and a SQL Server CE?. I just set up the application that sets up the local and remote provider, and created all sync adapter commands (Insert, incremental Insert...) but when I call the Synchronize() method I get an exception. When...
Hi, I work in a company of about 20 people, I need to share some files with all of them in a folder(s) (files are constantly changed by me).., so they need to get the latest changed file automatically (pushed to their computer) What's the best program/system for this task? I need to be able to administrate their read/write access to the...
Assume I have a class like this: public class Server { public static void main(String[] args) { Map<Integer, ServerThread> registry = Collections.synchronizedMap(new LinkedHashMap<Integer, ServerThread>()); ... while(true) { Socket socket = serverSocket.accept(); ServerThread serverThread = new...
I currently have an n-tier application using entity framework 4.0 and we're looking at synching the contents of database between redundant servers. Does anyone have any experience on tips on how best to approach a solution? ...
public string CreateOrder(string purchaseOrder) { using (MyWebService.CreateService service = new MyWebService.CreateService()) { string orderCode = service.CreateOrder(purchaseOrder); return orderCode; } } I've added a web service reference to the domain layer of an ASP.NET web app. This generates the two...
I'm working on a feed reader iOS project. Feed entries are listed in a UITableView in reverse chronological order. On launch, they're loaded from a database into an array. When the app syncs to feeds, it creates a new array for the new order of things, and then to update the table, compares the new array to the old array to determine wh...
Hello! I have a producer and a consumer. Producer fills its internal queue with objects, consumer takes these objects one by one. I want to synchronize the cosumer with the producer, so that the consumer blocks when there are no objects ready, and I want to synchronize the producer with itself, so that it stops producing when the queue i...
Hello, Is it possible to do Incremental syncronization for occasionally connected clients using JDO. I stumbled upon JDOReplicationManager but not sure whether is solves the following needs, Replication to be initiated from an web application. Replication should be a two way process. i.e. Synchronization If there is a failure in netwo...
Hi everyone, I'm working on a bit of JavaScript that interacts with a client-side SQLite database, via the newish window.openDatabase(...), database.transaction(...) and related APIs. As most of you know when you execute a query in this way it is an asynchronous call, which is typically good. You can make the call and handle the results...
We have been using Microsoft Syncronization Framework for syncing up disconnnected laptops with a master SqlServer. Unluckily it has been an issue to correctly get all the dependecies installed and we also get weird errors sometimes. Are there any other commercial or open source alternatives that people have used that are easier and mor...
Hi, I am trying to get the content of one MSSQL database to a second MSSQL database. There is no conflict management required, no schema updating. It is just a plain copy and replace data. The data of the destination database would be overwritten, in case somebody would have had changed something there. Obviously, there are many ways t...
I have found very little on this topic. I'm trying to work out a way to synchronize pages cross-web without having to constantly reload pages to get new information, since the rate at which this would be necessary would cause the page to be outrageously slow. The flow I'm thinking is this: User A alters info displayed on Page A. Page ...
I have an external library which has a method which performs a long running task on a background thread. When it's done it fires off a Completed event on the thread that kicked off the method (typically the UI thread). It looks like this: public class Foo { public delegate void CompletedEventHandler(object sender, EventArgs e); ...
Hi everyone, I have developed my first COM component (yes, a newbie in the realm of COM development), initialization is done with COINIT_MULTITHREADED. Also, this COM component is a local server executable. But, I did not add any synchronization code to this component. What do you think: do I have to add CRITICAL_SECTIONs to code or MS C...
Hey, I'm writing some client-server-application where I have to deal with multiple threads. I've got some servers, that send alive-packets every few seconds. Those servers are maintained in a ConcurrentHashMap, that contains their EndPoints paired with the time the last alive-package arrived of the respective server. Now I've got a thr...
I have read that code inside a synchronized block conform to 'happens before' semantics so that all the values written inside a synchronized block should be visible to other threads in succession. Furthermore I have read that caches are only flushed with the termination of synchronized block. How would above semantic of 'happens before' ...
suppose we have multi processor machine and multi threaded application. If two threads have access to a synchronized method and they got executed at the same time which thread will gets the lock? or what will happen? Thanks ...
Hi folkds, I've got a source database (Sybase), which is read-only and you can write to the database with a import file. The other side is my own database (MSSQL) which has no limitations. The main problem is that there are no timestamps on the first database and I don't have any access to change the source database. So is there a engi...