countdownlatch Questions
8
Solved
Is there any advantage of using
java.util.concurrent.CountdownLatch
instead of
java.util.concurrent.Semaphore?
As far as I can tell the following fragments are almost equivalent:
1. Semaphor...
Marasmus asked 8/10, 2008 at 18:25
3
Solved
I am going through different concurrency model in multi-threading environment (http://tutorials.jenkov.com/java-concurrency/concurrency-models.html)
The article highlights about three concurrency m...
Johnathan asked 25/7, 2015 at 14:24
9
Solved
I need something which is directly equivalent to CountDownLatch, but is resettable (remaining thread-safe!). I can't use classic synchronisation constructs as they simply don't work in this situati...
Erdda asked 6/7, 2011 at 11:46
13
Solved
Can someone help me to understand what Java CountDownLatch is and when to use it?
I don't have a very clear idea of how this program works. As I understand all three threads start at once and eac...
Sherrell asked 24/7, 2013 at 6:47
0
I have just started to explore WorkManager in my app. My app will mostly be offline, so all the data is stored locally using room db. As soon as the device gets connected to a network I want to syn...
Tailor asked 24/5, 2020 at 10:53
2
I use the following code to schedule a background job execute every 15 mins.
WorkManager workManager = WorkManager.getInstance();
PeriodicWorkRequest ulpBackup;
ulpBackup = new PeriodicWorkReque...
Bonn asked 16/9, 2018 at 4:45
14
Solved
I was reading through the java.util.concurrent API, and found that
CountDownLatch: A synchronization aid that allows one or more threads to wait until a set of operations being performed in othe...
Margretmargreta asked 12/11, 2010 at 20:26
6
Solved
I have encountered a problem twice now whereby a producer thread produces N work items, submits them to an ExecutorService and then needs to wait until all N items have been processed.
Caveats
N...
Styliform asked 28/10, 2009 at 9:52
2
I've just started playing around with CountDownLatch in my Android app. Currently I am trying to make two Volley requests to my api, and wait until the data has been retrieved and stored before con...
Voltaism asked 1/8, 2016 at 8:52
2
Solved
In the docs for CountDownLatch I see something like:
public void run() {
try {
startSignal.await();
doWork();
doneSignal.countDown();
} catch (InterruptedException ex) {} // return;
}
Here...
Photosynthesis asked 6/5, 2015 at 10:59
1
Solved
I'm looking to create angular 2/4 countdown pipe.
Of course I can make individual countdowns, but how do I create multiple ones?
I want the following input:
<span [time]="unix timestamp here"...
Murrelet asked 20/7, 2017 at 0:19
5
When waiting for other threads to finish, we can use either join or CountdownLatch. What are the pros and cons of using either of those two mechanisms?
Taking asked 3/9, 2012 at 22:33
1
Solved
I have the following program, where I am using java.util.concurrent.CountDownLatch and without using await() method it's working fine.
I am new to concurrency and want to know the purpose of await(...
Turbulent asked 26/1, 2017 at 4:1
4
Solved
I looked into the code, everything is int -- the parameter passed to CountDownLatch constructor is int, the variable in Sync is int, the return type of Sync.getCount() is int. But CountDownLatch.ge...
Proustite asked 8/8, 2011 at 17:34
2
I am using a CountDownLatch to handle two Java threads. My class structure is as follows:
MainClass.java
ThreadOne.java
ThreadTwo.java
MainClass:
CountDownLatch latch = new CountDownLatch(2); ...
Vergos asked 18/5, 2016 at 11:49
3
I'm trying to test a method that does it's work in a separate thread, simplified it's like this:
public void methodToTest()
{
Thread thread = new Thread()
{
@Override
public void run() {
Claz...
Debbydebee asked 29/1, 2016 at 2:33
2
Solved
Supposedly I have the following class definition, when one thread wants to set a for multiple (potentially) waiting threads:
public class A {
private int a;
private CountDownLatch gate;
...
Garratt asked 13/1, 2016 at 10:44
3
Solved
I tried to create a test where I tried to force a race condition (or at least to increase the probability of its occurrence) and I've used a CountDownLatch.
The problem is that I get a java.lang.I...
Rudderpost asked 3/12, 2015 at 12:41
1
Solved
We have three different multi threading techniques in java - Fork/Join pool, Executor Service & CountDownLatch
Fork/Join pool (http://www.javacodegeeks.com/2011/02/java-forkjoin-parallel-progr...
Regeneracy asked 23/7, 2015 at 8:54
2
Solved
Concurrency management mechanisms such as wait/notify and lock/condition seem to be affected by spurious wakeups. Developers cater for those unexpected wakeups by re-checking that the condition has...
Objectivity asked 22/7, 2015 at 21:4
3
Solved
Here are two chunks of code that accomplish (what I think is) the same thing.
I basically am trying to learn how to use Java 1.5's concurrency to get away from Thread.sleep(long). The first exampl...
Pilsner asked 26/11, 2008 at 1:27
1
Solved
I created an example, i want to know how can I return a value using the CompletableFuture ? I also changed the CompletableFuture<Void> exeFutureList to be CompletableFuture<Integer> exe...
Tenancy asked 23/5, 2015 at 14:56
2
Solved
Below is my class which uses CountDownLatch to make sure reads are not happening on the primary, secondary and tertiary maps for the first time whenever writes are happening on those maps.
public ...
Davenport asked 5/7, 2014 at 21:44
1
Solved
I use a CountDownLatch for waiting for a certain event from another component (running in a different thread). The following approach would fit the semantics of my software, but I'm not sure whethe...
Fillip asked 26/5, 2012 at 23:5
2
Solved
Is there a C# equivalent to Java's CountDownLatch?
Fahey asked 7/12, 2009 at 1:19
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