/*
* Sonatype Nexus (TM) Open Source Version
* Copyright (c) 2007-2014 Sonatype, Inc.
* All rights reserved. Includes the third-party code listed at http://links.sonatype.com/products/nexus/oss/attributions.
*
* This program and the accompanying materials are made available under the terms of the Eclipse Public License Version 1.0,
* which accompanies this distribution and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Sonatype Nexus (TM) Professional Version is available from Sonatype, Inc. "Sonatype" and "Sonatype Nexus" are trademarks
* of Sonatype, Inc. Apache Maven is a trademark of the Apache Software Foundation. M2eclipse is a trademark of the
* Eclipse Foundation. All other trademarks are the property of their respective owners.
*/
package org.sonatype.nexus.extender.modules;
import java.util.concurrent.atomic.AtomicInteger;
import com.google.inject.AbstractModule;
import com.google.inject.Binding;
import org.eclipse.sisu.inject.DefaultRankingFunction;
import org.eclipse.sisu.inject.RankingFunction;
/**
* Provides ranking policy that gives more recent plugins priority over older plugins.
*
* @since 3.0
*/
public class RankingModule
extends AbstractModule
{
private final AtomicInteger rank = new AtomicInteger(1);
@Override
protected void configure() {
/*
* Workaround Sisu issue where DefaultRankingFunction doesn't take account potential @Priority values
* when calculating the maximum potential rank contained in a given Injector - this heuristic is used
* to decide the optimal time to merge in new results when iterating over a dynamic collection.
*/
bind(RankingFunction.class).toInstance(new RankingFunction()
{
private final RankingFunction function = new DefaultRankingFunction(rank.incrementAndGet());
public <T> int rank(Binding<T> binding) {
return function.rank(binding);
}
public int maxRank() {
return Integer.MAX_VALUE; // potential max rank could be as high as MAX_VALUE if @Priority is used
}
});
}
}