Insert into Database when all the tasks of ThreadPoolExecutor have finished executing there jobs
By : Antonio De Villar
Date : March 29 2020, 07:55 AM
it fixes the issue You basically have the answer already. Wait for executorService.awaitTermination to return, and the executor will have completed all it's tasks. This ignores tasks that may have failed due to an error. Another way to do this, and to check for errors is to do something like, code :
List<Future> futures = ...
for(...) {
futures.add(executor.submit(...));
}
for(Future f : futures) {
//this will throw an exception if an exception
//occurred executing the task, insert error handling as
//appropriate, perhaps calling cancel on tasks that
//have not yet completed
f.get();
}
//at this point all tasks have completed
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Executing gradle build tasks in custom tasks
By : Shaka Z.
Date : March 29 2020, 07:55 AM
it fixes the issue You can simply use 'finalizedBy' feature either by configure it inside 'release' task: code :
task release
{
finalizedBy clean, build
// Do some stuff
}
release.finalizedBy clean, build
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Testing RejectedExecutionHandler in ThreadPoolExecutor
By : Oscar Ali Castillo B
Date : March 29 2020, 07:55 AM
it fixes the issue I would personally create a situation where my ExecutorService will always reject a task and check that this task has been called using a counter. So for example my code could be something like that: code :
// A single threaded executor service that cannot have more than 1 task in its task queue
// such that I know that if I provide at least 3 tasks, at least 1 task will be rejected.
// Why 3? 1 task in the queue + 1 task executed by the thread of the pool
// = max of tasks that the pool can manage at a given time, so if I add 1 it will be
// rejected.
ExecutorService executor = new ThreadPoolExecutor(
1, 1, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<>(1),
Executors.defaultThreadFactory(), myHandler
);
// My Counter
AtomicInteger counter = new AtomicInteger();
// Some arbitrary task that lasts long enough to make sure that at least 3
// tasks will be submitted that will increment my counter once completed
Runnable task = () -> {
try {
Thread.sleep(1_000L);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
} finally {
counter.incrementAndGet();
}
};
try {
// Submit 3 tasks
executor.submit(task);
executor.submit(task);
executor.submit(task);
} finally {
// Shutdown the pool and wait until all the submitted tasks have been executed
executor.shutdown();
executor.awaitTermination(1L, TimeUnit.MINUTES);
}
// Ensure that we have 3 tasks that have been executed
assertEquals(3, counter.get());
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ThreadPoolExecutor not executing all tasks
By : 3i0yvob75y
Date : March 29 2020, 07:55 AM
I hope this helps . Suppose that 100 thread cannot be processed as maxPoolSize=10 and queueSize = 10 which means you can put inside your pull executor in worst case only 20 Threads. The best case can changed depending on performance and complexity of job inside each Thread. Try to Increase your queueSize to 90. So For sure 90 of them will wait and other 10 will be kept to work. Best explenation you can find here link:
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How to implement PriorityBlockingQueue with ThreadPoolExecutor and custom tasks
By : user3913753
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I've searched a lot but could not find a solutuion to my problem.
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