my vertx (4.0.2) application written in Java (11) uses some data-heavy verticles that cause latency spikes because the eventloop gets blocked by them for a moment. For this reason i wanted to deploy these verticles as worker verticles, so that the eventloop and other verticles are no longer blocked. Unfortuna…
Tag: multithreading
Adding money from one account to another using multithreading
I have 2 accounts and 2 threads. 1 thread transfers money from 1 account to 2 account, 2 thread transfers money from 2 account to 1 account, if of course there is enough money. I need to realize the deadlock situation and solve the deadlock situation confirming safe transfer. Here is what I have for now: Acco…
Is Android AsyncTask use multithreading because android official web says?
while learning the difference between multi-threading and Concurrency.i follow this stackoverflow answer according to my understanding AsyncTask is just used to on or off the use of main thread{ui thread} while events like http request or fetching data from database. and after task is done main thead is reall…
Multiple thread failed to execute the nonsynchronized code in java
If Thread1 get the lock and start executing the synchronized block, During the same time,Thread2 is free to execute the non-synchronized part of the code which is IntStream.range(0, 5).forEach(x -> System.out.println(“thread Unsafe Zone,”+name)). Unexpectedly,below is what actually happening wh…
Unexpected behaviour of Threads
I am trying to achieve that thread2 should complete first, then thread1, For this O am using join() method. But if I uncomment the System.out.println() present in the try block of thread1 class. then code give null pointer exception. Why in try block I need to add line, it doesn’t make any sense that ad…
Why the hang() method is only getting executed for one time?
The task of hang() method is to hang/freeze the program for certain time (I know there are other ways to freeze a program, but I want to show it by using for loop). But when I am executing this, the first hang() call, below the System.out.print(“Loading”) is taking a certain amount of time and giv…
java.lang.InterruptedException while running a batch file
I am trying to run a batch file which has set of services I want to restart. When I call this batch file from my Java application I get Interrupted Exception. My batch file My java code to run the batch file I’m getting the following error What am I doing wrong? Answer Looks like the problem is with the
Why use a map in Thread to store ThreadLocal objects? [closed]
I’m reading ThreadLocal’s source codes.And I get a question which is unable to understand.That is why use a map to store ThreadLocal objects?I think use array is more suitable.Because you can define …
How Can I print like below using thread synchronization method?
I have used thread Synchronization method to print ASCII code and its value like below example. Ex:- A 65 B 66 C 67 . . . . Z 90 But the output is this. Following are the two threads. Thread 1 Thread 2 Main What can I do for it without changing main method? Answer This can be solved using
How to use executor service in loop for each iteration?
My aim is to fetch data of batch size 2(say) and for 3(say) batches/pages as mentioned in the above code. I’m trying to give the responsibility for fetching the data and pushing the event for a page to a thread i.e. 1 thread for 1 page. I worked on it and able to write the above logic. But when I’…