About

The purpose of this app is to illustrate achieving concurrency on data by restricting the write operations to a single thread.
In this case, ThreadSafeList represents a concurrent implementation of a list, that uses ArrayList as the underlying collection. The class exposes methods to add, remove and get all stored data.
The class internally creates a single threaded ExecutorService on which all add and remove operations are performed.

Everything in the package tracking is purely meant to track active threads.

Testing

In Main we instantiate a ThreadSafeList to test if every add and remove operation are isolated to one single thread.

Running Main shows us that the iterations defined in main are performed on each thread defined in the executor thread pool.

Executed add iteration: 0 on ThreadInfo{id=22, name='pool-2-thread-1'}
Executed add iteration: 2 on ThreadInfo{id=24, name='pool-2-thread-3'}
Executed add iteration: 1 on ThreadInfo{id=23, name='pool-2-thread-2'}
Executed add iteration: 3 on ThreadInfo{id=25, name='pool-2-thread-4'}
...
Executed remove iteration: 21 on ThreadInfo{id=23, name='pool-2-thread-2'}
Executed remove iteration: 22 on ThreadInfo{id=24, name='pool-2-thread-3'}
Executed remove iteration: 24 on ThreadInfo{id=22, name='pool-2-thread-1'}
Executed remove iteration: 23 on ThreadInfo{id=25, name='pool-2-thread-4'}

And at the end the ThreadTracker displays the threads on which every operation in ThreadSafeList is executed.

-----> Key: add
ThreadInfo{id=26, name='pool-1-thread-1'}


-----> Key: getData
ThreadInfo{id=1, name='main'}


-----> Key: remove
ThreadInfo{id=26, name='pool-1-thread-1'}