All Questions
34 questions
4
votes
2
answers
1k
views
Distributed lock system using AWS S3
I need a distributed lock system for a service I'm writing. (There can be multiple instances of this service running at a time, and I need to make sure that only one instance does a particular cron ...
- 181
2
votes
1
answer
207
views
Barging lock in Java
I found myself in need of a lock that allows my server to barge the write lock that might be acquired by my users. It would never interrupt them, but it would jump the line so the next time the write ...
- 660
1
vote
1
answer
456
views
Is this locked use of a Java HashMap thread safe?
I am trying to improve the performance of one of my project's methods, which obtains the command line of a process using WMI. A summary of key points:
The method is on an object representing a Windows ...
- 155
2
votes
0
answers
118
views
Comparing Java Semaphore versus ReentrantReadWriteLock
In this post, I attempted to compare the performance of two concurrency constructs:
java.util.concurrent.Semaphore,
...
- 31.3k
3
votes
3
answers
1k
views
Threadsafe Stack
Here is a class which I have written to create a simple Stack data structure which can be shared across multiple threads.
It's a simple LIFO which has 2 operations: one to push onto the top of the ...
- 141
5
votes
2
answers
4k
views
Check for timeout in wait() loop
I want to check for a condition in a guarded wait() loop with a user-specified total timeout, similar to how ...
- 221
1
vote
1
answer
2k
views
Dining Philosopher's problem implementation with Java Locking Framework to avoid deadlock
Dining philosopher problem is one of the classic problems in computer science. I intended to implement it using Java threads. I attempted using the locking framework that came with Java 5 and used the ...
- 119
1
vote
1
answer
403
views
Acquiring multiple resource exclusively before processing using lock and monitor in JAVA
Here is my implementation of an all-or-wait-until-all kind of process. Each thread (kid) needs to guarantee it is the only thread processing the required resources (toys) at that moment.
If some ...
- 141
3
votes
1
answer
146
views
Delete temp files on startup
I wrote some code for my question about deleting temp files that weren't deleted on exit before and would like to get some feedback if I forgot some details or got something wrong.
...
- 166
5
votes
1
answer
2k
views
Concurrent byte array access in Java with different locking
I have one writer thread and 10 reader threads of a byte array. It is important to synchronize writes and reads over a "row" (16 bytes).
There are a lot less locks than rows, e.g. in the current ...
- 151
2
votes
1
answer
1k
views
AutoCloseable Lock
Surprisingly, this question has no satisfactory answer. A safe usage of a LockCloseable would be like
...
- 13.6k
2
votes
1
answer
282
views
Thread-safe Bloom Filter in Java
I have tried to implement a Bloom Filter in Java here.
https://github.com/srirammanoj/skynet/tree/master/bloomfilter
I just wanted to know if my implementation can be called 'thread-safe' , and if ...
- 53
5
votes
2
answers
212
views
Lock implementation using atomics
I was recently given an interview and was asked to write my own lock implementation using atomics, but not necessary reentrant.
I didn't answer the question, but at home, I wrote this code. Please ...
- 593
3
votes
1
answer
106
views
0
votes
2
answers
6k
views
