org.btrplace.scheduler.runner.disjoint.Instances Maven / Gradle / Ivy
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Instance solvers that split a single problem into smaller parts
to solve them in parallel.
/*
* Copyright (c) 2016 University Nice Sophia Antipolis
*
* This file is part of btrplace.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see .
*/
package org.btrplace.scheduler.runner.disjoint;
import gnu.trove.map.hash.TIntIntHashMap;
import org.btrplace.model.Instance;
import org.btrplace.model.Mapping;
import org.btrplace.model.Node;
import org.btrplace.model.VM;
import java.util.Collection;
/**
* Utility class to manipulate multiple instances.
*
* @author Fabien Hermenier
*/
public final class Instances {
/**
* Utility class, no instantiation.
*/
private Instances() {
}
/**
* Make an index revealing the position of each VM in a collection
* of disjoint instances
*
* @param instances the collection to browse. Instances are supposed to be disjoint
* @return the index of every VM. Format {@code VM#id() -> position}
*/
public static TIntIntHashMap makeVMIndex(Collection instances) {
TIntIntHashMap index = new TIntIntHashMap();
int p = 0;
for (Instance i : instances) {
Mapping m = i.getModel().getMapping();
for (Node n : m.getOnlineNodes()) {
for (VM v : m.getRunningVMs(n)) {
index.put(v.id(), p);
}
for (VM v : m.getSleepingVMs(n)) {
index.put(v.id(), p);
}
}
for (VM v : m.getReadyVMs()) {
index.put(v.id(), p);
}
p++;
}
return index;
}
/**
* Make an index revealing the position of each node in a collection
* of disjoint instances
*
* @param instances the collection to browse. Instances are supposed to be disjoint
* @return the index of every node. Format {@code Node#id() -> position}
*/
public static TIntIntHashMap makeNodeIndex(Collection instances) {
TIntIntHashMap index = new TIntIntHashMap();
int p = 0;
for (Instance i : instances) {
Mapping m = i.getModel().getMapping();
for (Node n : m.getOfflineNodes()) {
index.put(n.id(), p);
}
for (Node n : m.getOnlineNodes()) {
index.put(n.id(), p);
}
p++;
}
return index;
}
}
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