Sleep ThreadPoolExecutor threads until interruption - multithreading

Question

This is a sample batch processing application. Initially I do create a thread pool for the batch processing and then execute those threads on the batching. Once the batch processing is started, it is keep looping and searching for entries in the queue for batching. That is a huge performance drain and the CPU usage goes to max.
The following block contains the sample code, I am currently working on.
BlockingQueue<BatchRequestEntry> batchingQueue;
ThreadPoolExecutor executorService executorService;
private boolean isRunning = false;
private ExecutorService getExecutorService() {
if (executorService == null) {
ThreadFactory threadFactory = new ThreadFactoryBuilder().setNameFormat("batch-processor-%d").build();
executorService = new ThreadPoolExecutor(batchProcessorConfiguration.getThreadCount(), batchProcessorConfiguration.getThreadCount(),
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<>(), threadFactory);
}
return executorService;
}
public synchronized void start() {
if (isRunning) {
return;
}
getExecutorService().submit(() -> {
while (isRunning) {
if (!batchingQueue.isEmpty()) {
List<BatchRequestEntry> entries = batchingQueue.batch(batchProcessorConfiguration.getBatchingMaxCount());
executorService.submit(() -> process(entries));
}
}
});
isRunning = true;
}
public SettableFuture<BatchResultEntry> append(BatchRequestEntry batchRequestEntry) {
if (!isRunning) {
start();
}
SettableFuture<BatchResultEntry> future = SettableFuture.create();
batchingQueue.append(batchRequestEntry);
futures.put(batchRequestEntry.getEntryId(), future);
return future;
}
What I want to provide as a solution is to capture the number of loops with empty batching queue. Then compare that value with a threshold value and sleep the threads in the thread pool. Once the new entries are appended to the batching queue, I want to interrupt the thread sleep and continue the loop for batching. I think that would solve the problem.
I want to figure how to do that with ThreadPoolExecutor and I would appreciate if there are better approaches to address this problem. Thank you!