
org.btrplace.scheduler.choco.transition.VMTransition Maven / Gradle / Ivy
/*
* Copyright 2020 The BtrPlace Authors. All rights reserved.
* Use of this source code is governed by a LGPL-style
* license that can be found in the LICENSE.txt file.
*/
package org.btrplace.scheduler.choco.transition;
import org.btrplace.model.VM;
import org.btrplace.model.VMState;
import org.btrplace.scheduler.choco.Slice;
/**
* Interface to specify a transition over a VM.
*
* @author Fabien Hermenier
*/
public interface VMTransition extends Transition {
/**
* Get the VM manipulated by the action.
*
* @return the VM identifier
*/
VM getVM();
/**
* Get the slice denoting the possible current placement of the subject on a node.
*
* @return a {@link org.btrplace.scheduler.choco.Slice} that may be {@code null}
*/
Slice getCSlice();
/**
* Get the slice denoting the possible future placement off the subject
*
* @return a {@link Slice} that may be {@code null}
*/
Slice getDSlice();
/**
* Tell if this actions allow the management of the VM.
* Typically if it is possible to have a resulting action.
*
* @return {@code true} if the VM must be manipulated
*/
boolean isManaged();
/**
* Get the VM initial state.
* @return a state
*/
VMState getSourceState();
/**
* Get the future VM state.
* @return a state
*/
VMState getFutureState();
}
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