I want to have two threads querying (JDBC) two tables (from different servers/databases but related) for an ordered output then compare them or apply some logic record by record. The table size can be …
Tag: multithreading
Can multiple thread perform Single task, So that task gets done quickly ? in Java
I have a task, it consumes lots of seconds to complete. So I want to know whether using the multithreading concept in Java, can I use multiple threads to perform that single task, so that my task would get done quickly. Here is my Example. Thread Class: Main Class I want to understand, is it really possible t…
Kotlin process waits for all threads to finish?
I wrote this simple testing program: As I can see, the output is: My expectation is that at-least the “Thread End” message will not be printed, Cause that main function is ended and this main thread should be done running. Is Kotlin process always waiting for threads to finish before done? Answer …
Singleton writes a field in unsynchronized manner
I am getting : Singleton class writes to a field in an unsynchronized manner at 4-5 places in Springboot code while scanning through SonarQube. Now, I am trying to understand how can I make this warning go away? Is there a general fix for this error One example is below : Answer never ever expose a mutable fi…
How can I guarantee a thread is safely unlocking a lock upon termination, while all methods already handle it?
A server project, might run for very long time and create many threads. In the following code I ask myself do i have to protect the lock somehow in addition to an overall try catch in method setData(MyData data): note: assuming its thread-safe, i am not really familiar with other reasons or natural disasters …
How to pause the current loop without pausing current running thread in Android / Java?
In my android application, In my fragment, I have one while loop like Here new Mp4Composer is a Thread… This task is executed for each iteration of the loop..without completing the previous task (on task still in processing state)… the loop jumped to the next iteration.so the existing task doesn&#…
how to understand this interface Executor example in Java API docs [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago. Improve this question Can anyone help to explain this piece of code in details? I am learning ja…
Confusing reason for thread waking up when condition does not hold
I am currently reading Effective Java and I am on the concurrency chapter. While explaining reasons a thread might wake up when a condition doesn’t hold (condition of while loop in which a wait() call abides) there is one reason that is pretty confusing to me and I can’t seem to understand it. Ano…
Waiting for a task inside a thread pool using SwingWorker java
I’m simulating multiple Tasks inside a thread – when all of them should report to a GUI. So I have a unique form that has 4 Panels inside which should reply and do different Tasks.. they should each keep pooling a database and reporting stuff to the GUI. In this example, I just made it to write nu…
How to run a thread for one hour in java
I will be receiving an attribute and I want to run a job for that attribute for 1 hour – monitoring and logging things related to that attribute. After that one hour, the job will stop. Is there a way to run a task, thread or a job for one hour given a id for that thread? As far as