Java Code Examples for reactor.core.Scannable#Attr

@Override
@Nullable
public Object scanUnsafe(Scannable.Attr key) {
	if (key == Attr.CANCELLED) {
		return future == OperatorDisposables.DISPOSED;
	}
	if (key == Attr.TERMINATED) {
		return future == FINISHED;
	}
	if (key == Attr.BUFFERED) {
		return 1;
	}
	if (key == Attr.RUN_ON) return scheduler;

	return InnerProducer.super.scanUnsafe(key);
}
 

/**
 * Scan an {@link Executor} or {@link ExecutorService}, recognizing several special
 * implementations. Unwraps some decorating schedulers, recognizes {@link Scannable}
 * schedulers and delegates to their {@link Scannable#scanUnsafe(Scannable.Attr)}
 * method, introspects {@link ThreadPoolExecutor} instances.
 * <p>
 * If no data can be extracted, defaults to the provided {@code orElse}
 * {@link Scannable#scanUnsafe(Scannable.Attr) scanUnsafe}.
 *
 * @param executor the executor to introspect in a best effort manner.
 * @param key the key to scan for. CAPACITY and BUFFERED mainly.
 * @return an equivalent of {@link Scannable#scanUnsafe(Scannable.Attr)} but that can
 * also work on some implementations of {@link Executor}
 */
@Nullable
static final Object scanExecutor(Executor executor, Scannable.Attr key) {
	if (executor instanceof DelegateServiceScheduler.UnsupportedScheduledExecutorService) {
		executor = ((DelegateServiceScheduler.UnsupportedScheduledExecutorService) executor).get();
	}
	if (executor instanceof Scannable) {
		return ((Scannable) executor).scanUnsafe(key);
	}

	if (executor instanceof ExecutorService) {
		ExecutorService service = (ExecutorService) executor;
		if (key == Scannable.Attr.TERMINATED) return service.isTerminated();
		if (key == Scannable.Attr.CANCELLED) return service.isShutdown();
	}

	if (executor instanceof ThreadPoolExecutor) {
			final ThreadPoolExecutor poolExecutor = (ThreadPoolExecutor) executor;
			if (key == Scannable.Attr.CAPACITY) return poolExecutor.getMaximumPoolSize();
			if (key == Scannable.Attr.BUFFERED) return ((Long) (poolExecutor.getTaskCount() - poolExecutor.getCompletedTaskCount())).intValue();
			if (key == Scannable.Attr.LARGE_BUFFERED) return poolExecutor.getTaskCount() - poolExecutor.getCompletedTaskCount();
	}

	return null;
}
 

@Override
@Nullable
public Object scanUnsafe(Scannable.Attr key) {
	if (key == Attr.PREFETCH) return getPrefetch();
	if (key == Attr.PARENT) return source;
	if (key == Attr.RUN_ON) return scheduler;

	return null;
}
 

@Override
@Nullable
public Object scanUnsafe(Scannable.Attr key) {
	if (key == Scannable.Attr.PARENT) {
		return source;
	}
	return null;
}
 

@Override
@Nullable
public Object scanUnsafe(Scannable.Attr key) {
	if (key == Attr.PARENT) return source;
	if (key == Attr.PREFETCH) return getPrefetch();

	return null;
}
 

@Override
@Nullable
public Object scanUnsafe(Scannable.Attr key) {
	if (key == Scannable.Attr.PREFETCH) return getPrefetch();
	if (key == Scannable.Attr.PARENT) return source;
	return null;
}
 

@Override
@Nullable
public Object scanUnsafe(Scannable.Attr key) {
	if (key == Attr.PARENT) return source;
	if (key == Attr.PREFETCH) return getPrefetch();

	return null;
}
 

@Override
@Nullable
public Object scanUnsafe(Scannable.Attr key) {
	if (key == Scannable.Attr.PARENT) {
		return source;
	}
	return null;
}
 

@Override
@Nullable
public Object scanUnsafe(Scannable.Attr key) {
	if (key == Scannable.Attr.PARENT) return source;
	if (key == Scannable.Attr.PREFETCH) return getPrefetch();

	return null;
}
 

@Override
@Nullable
public Object scanUnsafe(Scannable.Attr key) {
	if (key == Scannable.Attr.PREFETCH) return getPrefetch();
	if (key == Scannable.Attr.PARENT) return source;
	return null;
}
 

@Override
public Object scanUnsafe(Scannable.Attr key) {
	if (key == Scannable.Attr.RUN_ON) return scheduler;

	return null;
}