// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
package com.cloud.network;

import com.cloud.deploy.DeployDestination;
import com.cloud.vm.NicProfile;
import com.cloud.vm.ReservationContext;
import com.cloud.vm.VirtualMachine;
import com.cloud.vm.VirtualMachineProfile;

/**
 * NetworkGuru and NetworkElements that implement this interface 
 * will be called during Virtual Machine migration.
 */
public interface NetworkMigrationResponder {
    /**
     * Prepare for migration.
     * 
     * This method will be called per nic before the vm migration.
     * @param nic
     * @param network
     * @param vm
     * @param dest
     * @param context
     * @return true when operation was successful.
     */
    public boolean prepareMigration(NicProfile nic, Network network, VirtualMachineProfile<? extends VirtualMachine> vm, DeployDestination dest, ReservationContext context);

    /**
     * Cancel for migration preparation.
     * 
     * This method will be called per nic when the entire vm migration 
     * process failed and need to release the resouces that was 
     * allocated at the migration preparation.
     * @param nic destination nic
     * @param network destination network
     * @param vm destination vm profile
     * @param src The context nic migrates from.
     * @param dst The context nic migrates to.
     */
    public void rollbackMigration(NicProfile nic, Network network, VirtualMachineProfile<? extends VirtualMachine> vm, ReservationContext src, ReservationContext dst);

    /**
     * Commit the migration resource.
     * 
     * This method will be called per nic when the entire vm migration 
     * process was successful. This is useful to release the resource of 
     * source deployment where vm has left.
     * @param nic source nic
     * @param network source network
     * @param vm source vm profile
     * @param src the context nic migrates from.
     * @param dst the context nic migrates to.
     */
    public void commitMigration(NicProfile nic, Network network, VirtualMachineProfile<? extends VirtualMachine> vm, ReservationContext src, ReservationContext dst);
}