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A Java API for Meta-CSP based reasoning
package org.metacsp.tests.meta;
import java.util.logging.Level;
import junit.framework.TestCase;
import org.metacsp.framework.Constraint;
import org.metacsp.framework.ConstraintNetwork;
import org.metacsp.framework.ValueOrderingH;
import org.metacsp.framework.VariableOrderingH;
import org.metacsp.meta.symbolsAndTime.ReusableResource;
import org.metacsp.meta.symbolsAndTime.Schedulable.PEAKCOLLECTION;
import org.metacsp.meta.symbolsAndTime.Scheduler;
import org.metacsp.multi.activity.SymbolicVariableActivity;
import org.metacsp.multi.activity.ActivityNetworkSolver;
import org.metacsp.multi.allenInterval.AllenIntervalConstraint;
import org.metacsp.multi.allenInterval.AllenIntervalConstraint.Type;
import org.metacsp.time.Bounds;
import org.metacsp.utility.logging.MetaCSPLogging;
import org.metacsp.utility.timelinePlotting.TimelinePublisher;
import org.metacsp.utility.timelinePlotting.TimelineVisualizer;
public class TestReusableResourceScheduler extends TestCase {
@Override
public void setUp() throws Exception {
MetaCSPLogging.setLevel(Level.OFF);
}
@Override
public void tearDown() throws Exception {
}
/**
* Bug: When two activities meet they create a peak and scheduling fails.
*/
public void testMeetsCausesOverUsage() {
final Scheduler metaSolver = new Scheduler(0,600,0);
final ActivityNetworkSolver groundSolver = (ActivityNetworkSolver)metaSolver.getConstraintSolvers()[0];
SymbolicVariableActivity one = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
one.setSymbolicDomain("1");
SymbolicVariableActivity two = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
two.setSymbolicDomain("1");
//DURATIONS
AllenIntervalConstraint dur1 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Duration, new Bounds(35, 55));
dur1.setFrom(one);
dur1.setTo(one);
AllenIntervalConstraint dur2 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Duration, new Bounds(35, 55));
dur2.setFrom(two);
dur2.setTo(two);
//PRECEDENCES
AllenIntervalConstraint con1 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Meets);
con1.setFrom(one);
con1.setTo(two);
//Add the constraints
Constraint[] cons = new Constraint[]{dur1,dur2,con1/*,eqOne,eqTwo,eqThree*/};
groundSolver.addConstraints(cons);
//Most critical conflict is the one with most activities (largest peak)
VariableOrderingH varOH = new VariableOrderingH() {
@Override
public int compare(ConstraintNetwork arg0, ConstraintNetwork arg1) {
// TODO Auto-generated method stub
return arg1.getVariables().length - arg0.getVariables().length;
}
@Override
public void collectData(ConstraintNetwork[] allMetaVariables) {
// TODO Auto-generated method stub
}
};
ValueOrderingH valOH = new ValueOrderingH() {
@Override
public int compare(ConstraintNetwork o1, ConstraintNetwork o2) {
// TODO Auto-generated method stub
return 0;
}
};
ReusableResource rr1 = new ReusableResource(varOH, valOH, 1);
rr1.setUsage(one,two);
metaSolver.addMetaConstraint(rr1);
assertTrue( metaSolver.backtrack() );
}
public void testResourcesOrig() {
final Scheduler metaSolver = new Scheduler(0,600,0);
final ActivityNetworkSolver groundSolver = (ActivityNetworkSolver)metaSolver.getConstraintSolvers()[0];
SymbolicVariableActivity one = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
one.setSymbolicDomain("2");
SymbolicVariableActivity two = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
two.setSymbolicDomain("1");
SymbolicVariableActivity three = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
three.setSymbolicDomain("3");
//DURATIONS
AllenIntervalConstraint dur1 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Duration, new Bounds(35, 55));
dur1.setFrom(one);
dur1.setTo(one);
AllenIntervalConstraint dur2 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Duration, new Bounds(35, 55));
dur2.setFrom(two);
dur2.setTo(two);
AllenIntervalConstraint dur3 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Duration, new Bounds(35, 55));
dur3.setFrom(three);
dur3.setTo(three);
//PRECEDENCES
AllenIntervalConstraint con1 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Before, Type.Before.getDefaultBounds());
con1.setFrom(one);
con1.setTo(two);
//Add the constraints
Constraint[] cons = new Constraint[]{dur1,dur2,dur3,con1/*,eqOne,eqTwo,eqThree*/};
groundSolver.addConstraints(cons);
//Most critical conflict is the one with most activities (largest peak)
VariableOrderingH varOH = new VariableOrderingH() {
@Override
public int compare(ConstraintNetwork arg0, ConstraintNetwork arg1) {
// TODO Auto-generated method stub
return arg1.getVariables().length - arg0.getVariables().length;
}
@Override
public void collectData(ConstraintNetwork[] allMetaVariables) {
// TODO Auto-generated method stub
}
};
ValueOrderingH valOH = new ValueOrderingH() {
@Override
public int compare(ConstraintNetwork o1, ConstraintNetwork o2) {
// TODO Auto-generated method stub
return 0;
}
};
ReusableResource rr1 = new ReusableResource(varOH, valOH, 4);
ReusableResource rr2 = new ReusableResource(varOH, valOH, 3);
rr1.setUsage(one,two,three);
rr2.setUsage(two,three);
metaSolver.addMetaConstraint(rr1);
metaSolver.addMetaConstraint(rr2);
assertTrue( metaSolver.backtrack() );
}
/**
* Sampling peak collection misses this conflict. The problem disappears when removing Activity a1 and a3 (see next test case)
* @throws Exception
*/
public void testPeakCollectionSamplingBug() throws Exception {
final Scheduler metaSolver = new Scheduler(0,5000,0);
final ActivityNetworkSolver groundSolver = (ActivityNetworkSolver)metaSolver.getConstraintSolvers()[0];
SymbolicVariableActivity a1 = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
a1.setSymbolicDomain("1");
SymbolicVariableActivity a2 = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
a2.setSymbolicDomain("1");
SymbolicVariableActivity a3 = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
a3.setSymbolicDomain("1");
SymbolicVariableActivity a4 = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
a4.setSymbolicDomain("1");
SymbolicVariableActivity a5 = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
a5.setSymbolicDomain("1");
// liftUsage(slow0) -> liftUsage(slow0)::U
// liftUsage(slow0) -> liftUsage(slow0)::U
// liftUsage(slow0) -> liftUsage(slow0)::U
// liftUsage(slow0) -> liftUsage(slow0)::U
// liftUsage(slow0) -> liftUsage(slow0)::U
AllenIntervalConstraint rel1 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Release, new Bounds(39, 4799));
AllenIntervalConstraint dead1 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Deadline, new Bounds(97, 4857));
rel1.setFrom(a1); rel1.setTo(a1); dead1.setFrom(a1); dead1.setTo(a1);
AllenIntervalConstraint rel2 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Release, new Bounds(39, 4799));
AllenIntervalConstraint dead2 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Deadline, new Bounds(5000, 5000));
rel2.setFrom(a2); rel2.setTo(a2); dead2.setFrom(a2); dead2.setTo(a2);
AllenIntervalConstraint rel3 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Release, new Bounds(137, 4897));
AllenIntervalConstraint dead3 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Deadline, new Bounds(191, 4951));
rel3.setFrom(a3); rel3.setTo(a3); dead3.setFrom(a3); dead3.setTo(a3);
AllenIntervalConstraint rel4 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Release, new Bounds(192, 4952));
AllenIntervalConstraint dead4 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Deadline, new Bounds(5000, 5000));
rel4.setFrom(a4); rel4.setTo(a4); dead4.setFrom(a4); dead4.setTo(a4);
AllenIntervalConstraint rel5 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Release, new Bounds(239, 4999));
AllenIntervalConstraint dead5 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Deadline, new Bounds(5000, 5000));
rel5.setFrom(a5); rel5.setTo(a5); dead5.setFrom(a5); dead5.setTo(a5);
// Thread.sleep(20000);
//Add the constraints
Constraint[] cons = new Constraint[]{rel1, rel2, rel3, rel4, rel5, dead1, dead2, dead3, dead4, dead5 };
boolean tempCon = groundSolver.addConstraints(cons);
assertTrue( tempCon );
//Most critical conflict is the one with most activities (largest peak)
VariableOrderingH varOH = new VariableOrderingH() {
@Override
public int compare(ConstraintNetwork arg0, ConstraintNetwork arg1) {
// TODO Auto-generated method stub
return arg1.getVariables().length - arg0.getVariables().length;
}
@Override
public void collectData(ConstraintNetwork[] allMetaVariables) {
// TODO Auto-generated method stub
}
};
ValueOrderingH valOH = new ValueOrderingH() {
@Override
public int compare(ConstraintNetwork o1, ConstraintNetwork o2) {
// TODO Auto-generated method stub
return 0;
}
};
ReusableResource rr1 = new ReusableResource(varOH, valOH, 2);
rr1.setPeakCollectionStrategy(PEAKCOLLECTION.SAMPLING);
rr1.setUsage( a1, a2, a3, a4, a5 );
metaSolver.addMetaConstraint(rr1);
boolean hasSolution = metaSolver.backtrack();
// while(true) {
// Thread.sleep(100);
// System.out.print(".");
// }
assertFalse( hasSolution );
}
/**
* Same as previous test case with two Activities removed. Now the conflict is found and backtrack() returns false
* @throws Exception
*/
public void testPeakCollectionSamplingBugDisappears() throws Exception {
final Scheduler metaSolver = new Scheduler(0,5000,0);
final ActivityNetworkSolver groundSolver = (ActivityNetworkSolver)metaSolver.getConstraintSolvers()[0];
SymbolicVariableActivity a2 = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
a2.setSymbolicDomain("1");
SymbolicVariableActivity a4 = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
a4.setSymbolicDomain("1");
SymbolicVariableActivity a5 = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
a5.setSymbolicDomain("1");
AllenIntervalConstraint rel2 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Release, new Bounds(39, 4799));
AllenIntervalConstraint dead2 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Deadline, new Bounds(5000, 5000));
rel2.setFrom(a2); rel2.setTo(a2); dead2.setFrom(a2); dead2.setTo(a2);
AllenIntervalConstraint rel4 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Release, new Bounds(192, 4952));
AllenIntervalConstraint dead4 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Deadline, new Bounds(5000, 5000));
rel4.setFrom(a4); rel4.setTo(a4); dead4.setFrom(a4); dead4.setTo(a4);
AllenIntervalConstraint rel5 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Release, new Bounds(239, 4999));
AllenIntervalConstraint dead5 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Deadline, new Bounds(5000, 5000));
rel5.setFrom(a5); rel5.setTo(a5); dead5.setFrom(a5); dead5.setTo(a5);
//Add the constraints
Constraint[] cons = new Constraint[]{ rel2, rel4, rel5, dead2, dead4, dead5 };
groundSolver.addConstraints(cons);
//Most critical conflict is the one with most activities (largest peak)
VariableOrderingH varOH = new VariableOrderingH() {
@Override
public int compare(ConstraintNetwork arg0, ConstraintNetwork arg1) {
// TODO Auto-generated method stub
return arg1.getVariables().length - arg0.getVariables().length;
}
@Override
public void collectData(ConstraintNetwork[] allMetaVariables) {
// TODO Auto-generated method stub
}
};
ValueOrderingH valOH = new ValueOrderingH() {
@Override
public int compare(ConstraintNetwork o1, ConstraintNetwork o2) {
// TODO Auto-generated method stub
return 0;
}
};
TimelinePublisher tlp = new TimelinePublisher(groundSolver, "comp1");
TimelineVisualizer tv = new TimelineVisualizer(tlp);
tlp.publish(false, true);
ReusableResource rr1 = new ReusableResource(varOH, valOH, 2);
rr1.setPeakCollectionStrategy(PEAKCOLLECTION.SAMPLING);
rr1.setUsage( a2, a4, a5);
metaSolver.addMetaConstraint(rr1);
boolean hasSolution = metaSolver.backtrack();
assertFalse( hasSolution );
}
public void testThreeUsagesOfBinaryResourceFail() {
final Scheduler metaSolver = new Scheduler(0,5000,0);
final ActivityNetworkSolver groundSolver = (ActivityNetworkSolver)metaSolver.getConstraintSolvers()[0];
SymbolicVariableActivity a1 = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
a1.setSymbolicDomain("1");
SymbolicVariableActivity a2 = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
a2.setSymbolicDomain("1");
SymbolicVariableActivity a3 = (SymbolicVariableActivity)groundSolver.createVariable("comp1");
a3.setSymbolicDomain("1");
AllenIntervalConstraint rel1 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Release, new Bounds(4994, 4997));
AllenIntervalConstraint dead1 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Deadline, new Bounds(4996, 4999));
rel1.setFrom(a1); rel1.setTo(a1); dead1.setFrom(a1); dead1.setTo(a1);
AllenIntervalConstraint rel2 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Release, new Bounds(4994, 4997));
AllenIntervalConstraint dead2 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Deadline, new Bounds(4996, 4999));
rel2.setFrom(a2); rel2.setTo(a2); dead2.setFrom(a2); dead2.setTo(a2);
AllenIntervalConstraint rel3 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Release, new Bounds(4994, 4997));
AllenIntervalConstraint dead3 = new AllenIntervalConstraint(AllenIntervalConstraint.Type.Deadline, new Bounds(4996, 4999));
rel3.setFrom(a3); rel3.setTo(a3); dead3.setFrom(a3); dead3.setTo(a3);
//Add the constraints
Constraint[] cons = new Constraint[]{rel1, rel2, rel3, dead1, dead2, dead3 };
boolean tempCon = groundSolver.addConstraints(cons);
assertTrue( tempCon );
//Most critical conflict is the one with most activities (largest peak)
VariableOrderingH varOH = new VariableOrderingH() {
@Override
public int compare(ConstraintNetwork arg0, ConstraintNetwork arg1) {
// TODO Auto-generated method stub
return arg1.getVariables().length - arg0.getVariables().length;
}
@Override
public void collectData(ConstraintNetwork[] allMetaVariables) {
// TODO Auto-generated method stub
}
};
ValueOrderingH valOH = new ValueOrderingH() {
@Override
public int compare(ConstraintNetwork o1, ConstraintNetwork o2) {
// TODO Auto-generated method stub
return 0;
}
};
ReusableResource rr1 = new ReusableResource(varOH, valOH, 2);
rr1.setPeakCollectionStrategy(PEAKCOLLECTION.SAMPLING);
rr1.setUsage( a1, a2, a3 );
metaSolver.addMetaConstraint(rr1);
boolean hasSolution = metaSolver.backtrack();
assertTrue( hasSolution );
}
}