You need to setup multiple components to be able to create an account programmatically. You need: an AccountAuthenticator a Service to provide access to the AccountAuthenticator some permissions The authenticator The authenticator is an object that will make the mapping between the account type and the autority (i.e. the linux-user) that have rights to manage … Read more
I think you are indeed looking at a JVM bug in the OSR. Using the simplified program from @Gray (slight modifications to print an error message) and some options to mess with/print JIT compilation, you can see what is going on with the JIT. And, you can use some options to control that to a … Read more
Synchronizing the run() method of a Runnable is completely pointless unless you want to share the Runnable among multiple threads and you want to sequentialize the execution of those threads. Which is basically a contradiction in terms. There is in theory another much more complicated scenario in which you might want to synchronize the run() … Read more
Just run the standard NTP daemon. It does have options to take input from several GPS devices as well as talking to network servers. Edit: I was referring to http://www.ntp.org/, not the one that comes with Windows. I don’t have any suggestion as to what NTP clients are best for windows, but for Unix machines … Read more
Guava has something like this being released in 13.0; you can get it out of HEAD if you like. Striped<Lock> more or less allocates a specific number of locks, and then assigns strings to locks based on their hash code. The API looks more or less like Striped<Lock> locks = Striped.lock(stripes); Lock l = locks.get(string); … Read more
You really don’t want to synchronize on an Integer, since you don’t have control over what instances are the same and what instances are different. Java just doesn’t provide such a facility (unless you’re using Integers in a small range) that is dependable across different JVMs. If you really must synchronize on an Integer, then … Read more
Your project is kinda interesting, that’s why I decided to try to help you. I have never used the youtube API but I have tried some coding and it might be a start for you. So here is the code I have tried and it seems to work quite well , it certainly needs some … Read more
I found this nice explanation in spring-mvc JavaDoc for WebUtils.getSessionMutex(): In many cases, the HttpSession reference itself is a safe mutex as well, since it will always be the same object reference for the same active logical session. However, this is not guaranteed across different servlet containers; the only 100% safe way is a session … Read more
A synchronized method uses the method receiver as a lock (i.e. this for non static methods, and the enclosing class for static methods). Synchronized blocks uses the expression as a lock. So the following two methods are equivalent from locking prospective: synchronized void mymethod() { … } void mymethod() { synchronized (this) { … } … Read more
OP answered his own, but did not directly answer the original question, I am going to post how to correctly use sync.Cond. You do not really need sync.Cond if you have one goroutine for each write and read – a single sync.Mutex would suffice to communicate between them. sync.Cond could useful in situations where multiple … Read more