/*
* Javolution - Java(TM) Solution for Real-Time and Embedded Systems
* Copyright (C) 2012 - Javolution (http://javolution.org/)
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software is
* freely granted, provided that this notice is preserved.
*/
package javolution.util.internal.collection;
import java.util.Iterator;
import javolution.context.ConcurrentContext;
import javolution.util.function.Consumer;
import javolution.util.function.Equality;
import javolution.util.service.CollectionService;
/**
* A parallel view over a collection.
*/
public class ParallelCollectionImpl<E> extends CollectionView<E> {
private static final long serialVersionUID = 0x600L; // Version.
public ParallelCollectionImpl(CollectionService<E> target) {
super(target);
}
@Override
public boolean add(E e) {
return target().add(e);
}
@Override
public void clear() {
target().clear();
}
@Override
public Equality<? super E> comparator() {
return target().comparator();
}
@Override
public boolean contains(Object obj) {
return target().contains(obj);
}
@Override
public boolean isEmpty() {
return target().isEmpty();
}
@Override
public Iterator<E> iterator() {
return target().iterator();
}
@Override
public void perform(final Consumer<CollectionService<E>> action,
CollectionService<E> view) {
ConcurrentContext ctx = ConcurrentContext.enter();
try {
int concurrency = ctx.getConcurrency();
CollectionService<E>[] subViews = view.split(concurrency + 1, false);
for (int i = 1; i < subViews.length; i++) {
final CollectionService<E> subView = subViews[i];
ctx.execute(new Runnable() {
@Override
public void run() {
target().perform(action, subView);
}
});
}
target().perform(action, subViews[0]); // This thread works too !
} finally {
// Any exception raised during parallel iterations will be re-raised here.
ctx.exit();
}
}
@Override
public boolean remove(Object obj) {
return target().remove(obj);
}
@Override
public int size() {
return target().size();
}
@Override
public CollectionService<E>[] split(int n, boolean threadsafe) {
return target().split(n, threadsafe); // Forwards.
}
@Override
public void update(final Consumer<CollectionService<E>> action,
CollectionService<E> view) {
ConcurrentContext ctx = ConcurrentContext.enter();
try {
int concurrency = ctx.getConcurrency();
CollectionService<E>[] subViews = view.split(concurrency + 1, true);
for (int i = 1; i < subViews.length; i++) {
final CollectionService<E> subView = subViews[i];
ctx.execute(new Runnable() {
@Override
public void run() {
target().update(action, subView);
}
});
}
target().perform(action, subViews[0]); // This thread works too !
} finally {
// Any exception raised during parallel iterations will be re-raised here.
ctx.exit();
}
}
}