multithreading

问题 When I query fileSystemWatcher.InternalBufferSize It will give the total Internal buffer size allocated to the Watcher. But I want to know (during debugging) how much buffer size for the Watcher is left and can be used and when I use the above statement in the Event handler method (say for the write operation) it always gives me the total buffer allocated size to the Watcher. Is there any way to obtain the remaining size of the buffer? Other Questions: From this answer, it is clear that event

问题 When I query fileSystemWatcher.InternalBufferSize It will give the total Internal buffer size allocated to the Watcher. But I want to know (during debugging) how much buffer size for the Watcher is left and can be used and when I use the above statement in the Event handler method (say for the write operation) it always gives me the total buffer allocated size to the Watcher. Is there any way to obtain the remaining size of the buffer? Other Questions: From this answer, it is clear that event

问题 Ho everybody, I'm trying to stop this thread when program stops (like when I press ctrl+C) but have no luck. I tried put t1.daemon=True but when I do this, my program ends just after I start it. please help me to stop it. def run(): t1 = threading.Thread(target=aStream).start() if __name__=='__main__': run() 回答1: One common way of doing what you seem to want, is joining the thread(s) for a while, like this: def main(): t = threading.Thread(target=func) t.daemon = True t.start() try: while

问题 I have a linux tool that (greatly simplifying) cuts me the sequences specified in illumnaSeq file. I have 32 files to grind. One file is processed in about 5 hours. I have a server on the centos, it has 128 cores. I've found a few solutions, but each one works in a way that only uses one core. The last one seems to fire 32 nohups, but it'll still pressurize the whole thing with one core. My question is, does anyone have any idea how to use the server's potential? Because basically every file

问题 In this question Is GenericObjectPool<T> from commons.apache.org thread safe? It is mentioned that its thread safe . Edited:But im having a situation in my multithreaded application that two threads are getting the same object from the pool at the same time.-This statement was wrong. I moved the borrowObject to synchronize block and it solved my issue. Has anyone faced this issue earlier? Here is my code: public static GenericObjectPool<IDocBuilderPool> documentBuilderPool = new

问题 Is there a specific type of Queue that is "closable", and is suitable for when there are multiple producers, consumers, and the data comes from a stream (so its not known when it will end)? I've been unable to find a queue that implements this sort of behavior, or a name for one, but it seems like a integral type for producer-consumer type problems. As an example, ideally I could write code where (1) each producer would tell the queue when it was done, (2) consumers would blindly call a

问题 I’m dealing with multithreading in Java and, as someone pointed out to me, I noticed that threads warm up, it is, they get faster as they are repeatedly executed. I would like to understand why this happens and if it is related to Java itself or whether it is a common behavior of every multithreaded program. The code (by Peter Lawrey) that exemplifies it is the following: for (int i = 0; i < 20; i++) { ExecutorService es = Executors.newFixedThreadPool(1); final double[] d = new double[4 *

问题 I created simple HttpListener that listens to port 9090 and depending on a request's URL writes some info to the console. But I'm stuck :( I thought of multithreading, event based system, but I dind't manage to do anything with it. Here is the code of my listener that I launched as a separate console app: string urlTemplate = String.Format("/prefix/{0}/suffix", id); string prefix = String.Format("http://localhost:9090/"); HttpListener listener = new HttpListener(); listener.Prefixes.Add

问题 Here the code class Aux implements Runnable { private Boolean isOn = false; private String statusMessage; private final Object lock; public Aux(String message, Object lock) { this.lock = lock; this.statusMessage = message; } @Override public void run() { for (;;) { synchronized (lock) { if (isOn && "left".equals(this.statusMessage)) { isOn = false; System.out.println(statusMessage); } else if (!isOn && "right".equals(this.statusMessage)) { isOn = true; System.out.println(statusMessage); } if

问题 Here the code class Aux implements Runnable { private Boolean isOn = false; private String statusMessage; private final Object lock; public Aux(String message, Object lock) { this.lock = lock; this.statusMessage = message; } @Override public void run() { for (;;) { synchronized (lock) { if (isOn && "left".equals(this.statusMessage)) { isOn = false; System.out.println(statusMessage); } else if (!isOn && "right".equals(this.statusMessage)) { isOn = true; System.out.println(statusMessage); } if