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/*
* Singleton class for default executor supplier
*/
public class DefaultExecutorSupplier{
/*
* Number of cores to decide the number of threads
*/
public static final int NUMBER_OF_CORES = Runtime.getRuntime().availableProcessors();
/*
* thread pool executor for background tasks
*/
private final ThreadPoolExecutor mForBackgroundTasks;
/*
* thread pool executor for light weight background tasks
*/
private final ThreadPoolExecutor mForLightWeightBackgroundTasks;
/*
* thread pool executor for main thread tasks
*/
private final Executor mMainThreadExecutor;
/*
* an instance of DefaultExecutorSupplier
*/
private static DefaultExecutorSupplier sInstance;
/*
* returns the instance of DefaultExecutorSupplier
*/
public static DefaultExecutorSupplier getInstance() {
if (sInstance == null) {
synchronized(DefaultExecutorSupplier.class){
sInstance = new DefaultExecutorSupplier();
}
return sInstance;
}
/*
* constructor for DefaultExecutorSupplier
*/
private DefaultExecutorSupplier() {
// setting the thread factory
ThreadFactory backgroundPriorityThreadFactory = new
PriorityThreadFactory(Process.THREAD_PRIORITY_BACKGROUND);
// setting the thread pool executor for mForBackgroundTasks;
mForBackgroundTasks = new ThreadPoolExecutor(
NUMBER_OF_CORES * 2,
NUMBER_OF_CORES * 2,
60L,
TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>(),
backgroundPriorityThreadFactory
);
// setting the thread pool executor for mForLightWeightBackgroundTasks;
mForLightWeightBackgroundTasks = new ThreadPoolExecutor(
NUMBER_OF_CORES * 2,
NUMBER_OF_CORES * 2,
60L,
TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>(),
backgroundPriorityThreadFactory
);
// setting the thread pool executor for mMainThreadExecutor;
mMainThreadExecutor = new MainThreadExecutor();
}
/*
* returns the thread pool executor for background task
*/
public ThreadPoolExecutor forBackgroundTasks() {
return mForBackgroundTasks;
}
/*
* returns the thread pool executor for light weight background task
*/
public ThreadPoolExecutor forLightWeightBackgroundTasks() {
return mForLightWeightBackgroundTasks;
}
/*
* returns the thread pool executor for main thread task
*/
public Executor forMainThreadTasks() {
return mMainThreadExecutor;
}
}
@zongren

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zongren commented May 21, 2018

Sorry to bother you, but how can I test this to prove it actually works?

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