api/src/com/cloud/vm/snapshot/VMSnapshotService.java

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package com.cloud.vm.snapshot;

import java.util.List;

import org.apache.cloudstack.api.command.user.vmsnapshot.ListVMSnapshotCmd;

import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.InsufficientServerCapacityException;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.exception.ResourceUnavailableException;
import com.cloud.uservm.UserVm;
import com.cloud.utils.Pair;
import com.cloud.vm.VirtualMachine;

public interface VMSnapshotService {

    Pair<List<? extends VMSnapshot>, Integer> listVMSnapshots(ListVMSnapshotCmd cmd);

    VMSnapshot getVMSnapshotById(Long id);

    VMSnapshot createVMSnapshot(Long vmId, Long vmSnapshotId, Boolean quiescevm);

    VMSnapshot allocVMSnapshot(Long vmId, String vsDisplayName, String vsDescription, Boolean snapshotMemory) throws ResourceAllocationException;

    boolean deleteVMSnapshot(Long vmSnapshotId);

    UserVm revertToSnapshot(Long vmSnapshotId) throws InsufficientServerCapacityException, InsufficientCapacityException, ResourceUnavailableException,
        ConcurrentOperationException;

    VirtualMachine getVMBySnapshotId(Long id);

    /**
     * Delete vm snapshots only from database. Introduced as a Vmware optimization in which vm snapshots are deleted when
     * the vm gets deleted on hypervisor (no need to delete each vm snapshot before deleting vm, just mark them as deleted on DB)
     * @param id vm id
     */
    boolean deleteVMSnapshotsFromDB(Long vmId);
}