Scott.Wu created VFS-504:
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Summary: Duplicate notifications if there are multiple
subscription to same file
Key: VFS-504
URL: https://issues.apache.org/jira/browse/VFS-504
Project: Commons VFS
Issue Type: Bug
Affects Versions: 2.0
Reporter: Scott.Wu
Priority: Critical
I initiate 2 threads to monitor same file. I hope to get 2 notifications if I
changed file, but finally I got 4. I think the root cause is the listener is
bound to file object, but event will be fired by filemonitor, each monitor will
point to same file which have 2 listeners.
// main process
for (int i = 0; i < 2; i++) {
Thread thread = new Thread(new Runnable() {
public void run() {
try {
IPAdapterFileMonitor monitor =
IPAdapterFileMonitor.getInstance();
monitor.startMonitor();
} catch (FileSystemException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
thread.start();
}
//method in thread.
public void startMonitor() throws FileSystemException{
DefaultFileMonitor fm = new DefaultFileMonitor(new
IPAdapterFileListener());
fm.addFile(targetFile);
fm.start();
System.out.println(Thread.currentThread().getId());
}
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