synchronized Questions
1
Solved
Say I have a method:
public void run(){
synchronized(this.foo){
}
}
but sometimes when I run this method, I don't need to synchronize on anything.
What is a good pattern to conditionally syn...
Fatherless asked 22/2, 2019 at 1:28
2
Solved
Consider the following method:
public void upsert(int customerId, int somethingElse) {
// some code which is prone to race conditions
}
I want to protect this method from race conditions, but ...
Spondaic asked 14/9, 2016 at 12:50
4
Solved
I am wondering at the difference between declaring a variable as volatile and always accessing the variable in a synchronized(this) block in Java?
According to this article http://www.javamex.com/...
Brio asked 19/8, 2010 at 7:34
23
Solved
Can any one tell me the advantage of synchronized method over synchronized block with an example?
Mot asked 22/2, 2009 at 3:13
3
Solved
I have read something in some foreign code and I want to check my assumption:
@synchronized(self) is used to get rid of the self prefix when setting a property.
So in my example below, I'm sett...
Greenhorn asked 11/1, 2011 at 5:23
12
Solved
I'm confused in join() method used in Threads in Java. In the following code:
// Using join() to wait for threads to finish.
class NewThread implements Runnable {
String name; // name of thread
...
Gore asked 28/8, 2013 at 5:0
9
Solved
According to the Java Language Specification, constructors cannot be marked synchronized because other threads cannot see the object being created until the thread creating it has finished it. This...
Hetti asked 2/2, 2011 at 21:39
3
Solved
Below is the code where a Thread enters a synchronized block, waits for 5 seconds and then exits. I have started two Thread instances simultaneously.
The expectation was one of the threads will ow...
Flaky asked 24/9, 2018 at 10:28
4
Solved
How to make functions in PHP synchronized so that same function won't be executed concurrently ? 2nd user must wait till 1st user is done with the function. Then 2nd user can execute the function.
...
Bolter asked 19/9, 2012 at 11:3
7
Solved
Having this wait declaration:
public final native void wait(long timeout) throws InterruptedException;
It could exit by InterruptedException, or by timeout, or because Notify/NotifyAll method wa...
Mayfair asked 3/8, 2010 at 14:51
0
I am getting an instance of a telephonymanager (single or multisim devices) and got several ANRs. I have managed to work through most of them but this one persists:
*Broadcast of Intent { act=and...
Nyssa asked 18/6, 2018 at 13:27
2
Solved
For example:
public synchronized Object get() {
while (result == null) {
try {
wait();
} catch (InterruptedException e) {
e.printStackTrace();
// Do we own the monitor of this object?
}
}
...
Buenrostro asked 2/5, 2018 at 13:12
7
in Java whenever we need to call wait/notify/notifyAll, we need to have access to object monitor (either through synchronized method or through synchronized block). So my question is why java didn'...
Hartley asked 11/8, 2011 at 1:9
1
Solved
I stumbled upon this article on IBM - developerworks, and the code they posted had me raise some questions:
Why is the building of the local variable Map wrapped within a synchronized block? Note...
Anemone asked 16/3, 2018 at 21:22
2
I am attempting to use synchronize method in spring controller. Because our Payment gateway hits method [@RequestMapping(value="/pay",method=RequestMethod.POST)] different transactions [txn id : tx...
Lobotomy asked 30/1, 2018 at 12:33
5
Solved
can you please explain to me this piece of java code? I cannot understand this syntax.
synchronized (this) {
try {
wait(endTime - System.currentTimeMillis());
} catch (Exception e) {
}
}
Marty asked 7/11, 2012 at 7:3
3
I've recently stumbled upon an article titled Synchronize access to mutable fields. It claims that:
For example, in a multi-threaded environment, all get and set methods for mutable fields...
Compost asked 13/12, 2017 at 14:43
5
Solved
In Java, assignment is atomic if the size of the variable is less than or equal to 32 bits but is not if more than 32 bits.
What (volatile/synchronized) would be more efficient to use in case of d...
Mechanist asked 22/11, 2009 at 17:2
7
I'm new to java.
I'm little bit confused between Threadsafe and synchronized.
Thread safe means that a method or class instance can be used by multiple threads at the same time without any problems...
Intendment asked 15/2, 2014 at 0:53
11
I user sun jdk 1.5 ThreadPoolExecutor( 24, 24,60,TimeUnit.SECONDS, new LinkedBlockingQueue()). soemtime I use jdb tool to find the status of all threads in thread pool are " waiting in a monitor", ...
Rattigan asked 8/12, 2008 at 9:21
4
Solved
What happens when a static synchronized method is called by two threads using different instances at the same time? Is it possible? The object lock is used for non static synchronized method but wh...
Bunkum asked 19/9, 2012 at 10:6
8
Solved
The Java documentation says:
it is not possible for two invocations of synchronized methods on the same object to interleave.
What does this mean for a static method? Since a static method has no...
Twobit asked 13/1, 2009 at 0:48
5
One of my java static method is accessed by multiple threads . Do I need to synchronize the method explicitly by synchronized keyword?.
Sometime back I read in a book which states that
static ...
Charlot asked 9/8, 2017 at 14:44
4
can anyone explain:
why do we get a deadlock?
how can Gaston enter function bow before Alphonse exit that function? (it should return from function bowBack() in order to exit the function bow() - ...
Mord asked 9/8, 2017 at 7:50
3
I have multiple methods in a class and most of the methods are having critical sections(shared data). So I made those methods as synchronized. Say thread t1 is running one of the synchronized block...
Sauterne asked 7/7, 2017 at 6:21
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