CurrentThreadExecutorService.java

package org.epics.archiverappliance.retrieval.workers;

import java.util.List;
import java.util.concurrent.AbstractExecutorService;
import java.util.concurrent.TimeUnit;

/**
 * An ExecutorService that runs everything on the current thread.
 * Used when the data generated by postprocessors is too large to fit in memory.
 * @author mshankar
 *
 */
public class CurrentThreadExecutorService extends AbstractExecutorService {
	boolean shutdown = false;

	@Override
	public void shutdown() {
		// Not much to do; we are not spawning other threads
		shutdown = true;
	}

	@Override
	public List<Runnable> shutdownNow() {
		// Not much to do; we are not spawning other threads
		shutdown = true;
		return null;
	}

	@Override
	public boolean isShutdown() {
		return shutdown;
	}

	@Override
	public boolean isTerminated() {
		return shutdown;
	}

	@Override
	public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
		return true;
	}

	@Override
	public void execute(Runnable command) {
		command.run();
	}

}