All Questions
Tagged with java concurrency
173 questions
2
votes
1
answer
79
views
Multithreaded Merge Sort Using ForkJoin Framework
I've implemented a multithreaded merge sort using Java's ForkJoin framework, and I wanted to gather feedback on its correctness, efficiency, and scalability.
Here's my implementation:
...
- 21
5
votes
2
answers
617
views
Thread-safe write-efficient register() method for a Load balancer
The code below was written for an interview question of designing a load balancer with only a register() method.
...
- 313
3
votes
1
answer
123
views
Amount Transfer Between Different Accounts - Improved Version
This is an improved code version for Amount Transfer Between Different Accounts
Welcoming any further improvements for this.
...
- 297
4
votes
1
answer
216
views
Amount Transfer Between Different Accounts
I implemented the below classes for transfer amount between different accounts. Used ConcurrentHashMap and Stamped Lock to handle concurrency.
Am I missing any important concepts here? Are there any ...
- 297
6
votes
2
answers
876
views
Reduce String Length With Thread Safety & Concurrency
I implemented the below URL Shortener class. Used ConcurrentHashMap to handle concurrency.
Short URL building logic may not be optimal, but it ensures that only ...
- 297
5
votes
2
answers
465
views
Implement service registry servers with load balancing strategies
Have Implemented below service registry class with 2 load balancing strategies.Used Strategy Pattern. Used Stamped lock ( Optimistic write locking) for ensuring thread safety and concurrency. Used ...
- 297
2
votes
2
answers
129
views
A thread-safe performant Money Transfer API in Java
This is a popular interview question. It is meant to be done within 30 minutes. The task is to implement a thread-safe performant Bank Account API that allows to transfer, deposit, withdraw and check ...
- 343
4
votes
2
answers
953
views
Simple load balancer
I would like to know the possible improvements in design and concurrency of the following load balancer:
ability to add/register new instance
keep max of 10 instances for load balancer
forbid ...
- 43
7
votes
2
answers
1k
views
A thread-safe performant URL Shortener in Java
This is a popular interview question. It is meant to be done within 45 minutes. The task is to implement a thread-safe performant in-memory URL Shortener.
My implementation is based on two maps that ...
- 343
5
votes
3
answers
113
views
Time based cache for single element
The container should be thread safe and provide lazy load of data, and cache the data for set period of time.
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- 151
2
votes
2
answers
142
views
Multiple Producer and Multiple Consumer Implementation Using Locks and Semaphore
This solution has a total of four classes.
Main.java: Class with main method. Execution starts here.
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- 121
0
votes
1
answer
105
views
decorator for an Executor that allows to get a List of running tasks
As stated in the javadoc below, this is intended for monitoring and debugging. I've found it especially useful for figuring out which tasks got stuck and prevented clean terminations of my ...
- 379
0
votes
1
answer
69
views
Delayed, concurrent event stack in Java - follow-up
I have slightly refactored the Delayed, concurrent event stack in Java. Now it looks like this:
DelayedEventStack.java
...
- 30.2k
0
votes
3
answers
204
views
Delayed, concurrent event stack in Java
(See the next iteration:
Delayed, concurrent event stack in Java - follow-up )
Motivation
I was confronted with a task of having "message events" for a GUI program. The use case is as ...
- 30.2k
3
votes
1
answer
157
views
A mutex that can detect certain types of programming error
This mutex prevents concurrent access to a target resource. One key requirement is the ability to be acquired
in a (scheduler) thread and released in a different (worker) thread. Unfortunately this ...
- 131