package com.exigen.ie.scheduler;
///////////////////////////////////////////////////////////////////////////////
/*
* Copyright Exigen Group 1998, 1999, 2000, 2002
* 320 Amboy Ave., Metuchen, NJ, 08840, USA, www.exigengroup.com
*
* The copyright to the computer program(s) herein
* is the property of Exigen Group, USA. All rights reserved.
* The program(s) may be used and/or copied only with
* the written permission of Exigen Group
* or in accordance with the terms and conditions
* stipulated in the agreement/contract under which
* the program(s) have been supplied.
*/
///////////////////////////////////////////////////////////////////////////////
import com.exigen.ie.constrainer.Failure;
import com.exigen.ie.constrainer.Goal;
import com.exigen.ie.constrainer.GoalImpl;
import com.exigen.ie.constrainer.IntExp;
import com.exigen.ie.constrainer.IntVar;
import com.exigen.ie.tools.Log;
/**
* This goal assigns specified resource for specified job consuming specified
* capacity (used by requirement constraints)
*
* @see GoalAssignAlternative
*/
public class GoalAssign extends GoalImpl
{
private Resource _resource;
private Job _job;
private int _capacity;
private IntVar _capacityVar;
private AlternativeResourceConstraint _requirement;
public GoalAssign(AlternativeResourceConstraint req, int resourceNum)
{
super(req.constrainer(), "");
_requirement = req;
_job = _requirement.getJob();
_resource = _requirement.getResource(resourceNum);
_capacity = _requirement.getCapacity();
_capacityVar = _requirement.getCapacityVar();
name("GoalAssign(" + _job + "," + _resource + ")");
}
public Goal execute() throws Failure
{
try
{
// System.out.println("APP:"+this);
apply();
}
catch (Failure f)
{
//System.out.println("FAIL");
constrainer().fail(
"Unable to bind job " + _job + " to resource " + _resource);
_job.saveAssignmentInfo();
}
if (_requirement != null)
_job.saveAssignmentInfo();
_requirement.assignResource(_resource);
return null;
}
private boolean apply() throws Failure
{
int c_start =
_resource.timeMin() < _job.startMin()
? _job.startMin()
: _resource.timeMin();
int c_end =
_resource.timeMax() > _job.endMax() ? _job.endMax() : _resource.timeMax();
if (c_start > c_end)
{
String msg =
"Resource "
+ _resource.getName()
+ " and Job "
+ _job.getName()
+ " do not overlap";
Log.error(this +" Failure: " + msg);
constrainer().fail(msg);
}
if (!_job.bound())
{
constrainer().fail("Cannot assign unbound job " + _job);
// return false;
}
if (_capacityVar != null)
{
if (!_capacityVar.bound())
{
constrainer().fail(
"Cannot assign unbound job " + _job + " : capacity var is not bound");
}
else
{
_capacity = _capacityVar.value();
}
}
/*
System.out.print("*** Applying RC("+_resource+","+_capacity+") on "+_job+": [");
for(int t=c_start; t < c_end; t++)
{
IntExp capvar = _resource.getCapacityVar(t);
System.out.print(" "+capvar.max());
}
System.out.println(" ]");
*/
for (int t = c_start; t < c_end; t++)
{
IntExp capvar = _resource.getCapacityVar(t);
if (capvar.max() < _capacity)
constrainer().fail("resource assigning");
}
for (int t = c_start; t < c_end; t++)
{
IntExp capvar = _resource.getCapacityVar(t);
capvar.setMax(capvar.max() - _capacity);
}
//_job.assignResource(_resource);
return true;
}
}