synchronization

Sync list with outlook only with items in current view

断了今生、忘了曾经 提交于 2019-11-30 15:56:07
Currently outlook takes all list data and synchronises it with outlook. Is it possible and how to synchronise only items in a specific view? I`m only interested in my items in the list. Unfortunately this is not possible out-of-the-box. When connecting a list to Outlook it occurs at the list level, not at the view level. There may be a product you can purchase that will do this. I've had a quick look around for you without success but hopefully someone else can help. I don't think you can do exactly what you are asking. You could use the Content Query or Search Core Results Web Parts to get a

How can I synchronize two processes accessing a file on a NAS?

爱⌒轻易说出口 提交于 2019-11-30 15:54:21
Here's the thing: I have two applications, written in C++ and running on two machines with different OS (one Linux and one Windows). One of this process is in charge of updating an XML file on a NAS (Network Attached Storage) while the other one reads this file. Is it possible to synchronize these two processes in order to avoid reading of the file at the same time it's being modified? You could create a lock file on the server that is created before you do a write, wait then write and delete on completion., Have the read process check for the token before reading the file. Edit : To address

Synchronized keyword internal implementation

天大地大妈咪最大 提交于 2019-11-30 15:34:12
How does JVM make sure threads acquire a lock after entering synchronized method of an object? Broad question: How does the JVM make sure...? The "VM" in "JVM" stands for "virtual machine." Your code doesn't do anything by itself. When we say, "your code runs", what we really mean is, the JVM executes your instructions. And it does so in accordance with the rules that are laid out in the JVM specification. One of the rules says that a JVM must never execute a synchronized block for two different threads on the same object at the same time. But there are many layers to the onion: A typeical JVM

What is the synchronization cost of calling a synchronized method from a synchronized method?

自闭症网瘾萝莉.ら 提交于 2019-11-30 14:39:57
问题 Is there any difference in performance between this synchronized void x() { y(); } synchronized void y() { } and this synchronized void x() { y(); } void y() { } 回答1: Yes, there is an additional performance cost, unless and until the JVM inlines the call to y() , which a modern JIT compiler will do in fairly short order. First, consider the case you've presented in which y() is visible outside the class. In this case, the JVM must check on entering y() to ensure that it can enter the monitor

How can I redirect the stdout and stderr of a command to both the console and a log file while outputting in real time?

牧云@^-^@ 提交于 2019-11-30 14:18:01
问题 The following bit of code does exactly what I want, except it only prints to the console. cmd := exec.Command("php", "randomcommand.php") cmd.Stdout = os.Stdout cmd.Stderr = os.Stderr if err := cmd.Run(); err != nil { log.Fatal(err) } randomcommand.php: // randomcommand.php simply alternates output between stdout and stderr 20 times $stdout = fopen('php://stdout', 'w+'); $stderr = fopen('php://stderr', 'w+'); for ($i = 1;$i <= 20; $i++) { fwrite($stdout, "stdout $i\n"); fwrite($stderr,

Need to manually synchronize the Synchronized list while iteration when it could be avoided?

余生颓废 提交于 2019-11-30 14:05:10
My question is about synchronizedList method Collections Class. Javadocs say: It is imperative that the user manually synchronize on the returned list when iterating over it: List list = Collections.synchronizedList(new ArrayList()); ... synchronized(list) { Iterator i = list.iterator(); // Must be in synchronized block while (i.hasNext()) foo(i.next()); } Though manually synchroniziation is not required for other methods. I looked into the source code of Collections class and found shyncronization has already been taken care for all methods like add public boolean add(E e) { synchronized(list

Synchronized stored procedure execution in mysql

谁都会走 提交于 2019-11-30 13:39:59
I have a stored procedure in mysql thats to perform a task that needs to be synchronized such that if two application calls the stored procedure, only one can access a section of code to perform the task, keeping the other one to get blocked until the first one finishes the task. DELIMITER $$ CREATE PROCEDURE SP_GEN_ID(IN NAME VARCHAR(20)) BEGIN DECLARE maxLen int default 0; START TRANSACTION; #the section of code that needs to be synchronized COMMIT END; $$ DELIMITER ; So, if two applications call the stored procedure simultaneously, the task has to be synchronized. a. But Start TRANSACTION

Synchronizing code with two subversion repositories

旧城冷巷雨未停 提交于 2019-11-30 12:53:28
问题 A bit of background first: I am using "base" code from a remote SVN repository, not under my control. The code is not tagged (yet), so I always need to keep up with the trunk. For a number of reasons (the most important being that our local extensions to the code are of a "niche" nature, and intended to solve a specific problem with the project in which the code is used) I can't use the remote repository to do version control of any modifications I make locally. I have a local SVN repository

Callers block until getFoo() has a value ready?

这一生的挚爱 提交于 2019-11-30 12:03:40
I have a Java Thread which exposes a property which other threads want to access: class MyThread extends Thread { private Foo foo; ... Foo getFoo() { return foo; } ... public void run() { ... foo = makeTheFoo(); ... } } The problem is that it takes some short time from the time this runs until foo is available. Callers may call getFoo() before this and get a null . I'd rather they simply block, wait, and get the value once initialization has occurred. ( foo is never changed afterwards.) It will be a matter of milliseconds until it's ready, so I'm comfortable with this approach. Now, I can make

Java: ArrayBlockingQueue vs. LinkedBlockingQueue

孤者浪人 提交于 2019-11-30 11:49:39
问题 I think that, in most cases, the ArrayBlockingQueue will perform better than the LinkedBlockingQueue . However, that is the case when there is always enough room in the array... If it gets full, it's not very predictable whether it will perform so well, since it will block the thread that's trying to push data into the queue... So, my question is: Is there any middle-ground implementation of BlockingQueue ? Say, an ArrayListBlockingQueue or a BucketListBlockingQueue ? Something like a list of