ConcurrentContext.java

package org.softlang.company.features.context;

import org.softlang.company.features.action.Action;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

/**
 * Run an action via submission to thread pool, i.e., concurrently
 */
public class ConcurrentContext implements Context {

    private static final int POOL_SIZE = 7;

    private ExecutorService pool;

    public ConcurrentContext() {
        pool = Executors.newFixedThreadPool(POOL_SIZE);
    }

    public synchronized <X, Y> void execute(final Action<X, Y> action,
            final X param) {

            final ConcurrentContext context = this;
            pool.submit(new Runnable() {
                public void run() {
                    action.execute(context, param);

                }
            });

    }

    public void waitForTermination() {
        try {
            pool.awaitTermination(2, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
    }

}