// Copyright 2012 Citrix Systems, Inc. Licensed under the
// Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License.  Citrix Systems, Inc.
// reserves all rights not expressly granted by 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.
// 
// Automatically generated by addcopyright.py at 04/03/2012
package com.cloud.capacity;

import com.cloud.host.HostVO;
import com.cloud.storage.StoragePoolVO;
import com.cloud.storage.VMTemplateVO;
import com.cloud.utils.component.Manager;
import com.cloud.vm.VirtualMachine;

/**
 * Capacity Manager manages the different capacities
 * available within the Cloud Stack.
 *
 */
public interface CapacityManager extends Manager {
    public boolean releaseVmCapacity(VirtualMachine vm, boolean moveFromReserved, boolean moveToReservered, Long hostId);

    void allocateVmCapacity(VirtualMachine vm, boolean fromLastHost);
    
    /**
     * @param hostId Id of the host to check capacity
     * @param cpu required CPU
     * @param ram required RAM
     * @param cpuOverprovisioningFactor factor to apply to the actual host cpu
     */
    boolean checkIfHostHasCapacity(long hostId, Integer cpu, long ram, boolean checkFromReservedCapacity, float cpuOverprovisioningFactor, boolean considerReservedCapacity);
    
	void updateCapacityForHost(HostVO host);
    
	/**
     * @param pool storage pool
     * @param templateForVmCreation template that will be used for vm creation 
     * @return total allocated capacity for the storage pool
     */
    long getAllocatedPoolCapacity(StoragePoolVO pool, VMTemplateVO templateForVmCreation);
}