api/src/main/java/com/cloud/storage/VolumeApiService.java

/*
 * 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.storage;

import java.net.MalformedURLException;

import org.apache.cloudstack.api.command.user.volume.AttachVolumeCmd;
import org.apache.cloudstack.api.command.user.volume.CreateVolumeCmd;
import org.apache.cloudstack.api.command.user.volume.DetachVolumeCmd;
import org.apache.cloudstack.api.command.user.volume.ExtractVolumeCmd;
import org.apache.cloudstack.api.command.user.volume.GetUploadParamsForVolumeCmd;
import org.apache.cloudstack.api.command.user.volume.MigrateVolumeCmd;
import org.apache.cloudstack.api.command.user.volume.ResizeVolumeCmd;
import org.apache.cloudstack.api.command.user.volume.UploadVolumeCmd;
import org.apache.cloudstack.api.response.GetUploadParamsResponse;
import org.apache.cloudstack.framework.config.ConfigKey;

import com.cloud.exception.ResourceAllocationException;
import com.cloud.user.Account;

public interface VolumeApiService {

    ConfigKey<Long> ConcurrentMigrationsThresholdPerDatastore = new ConfigKey<Long>("Advanced"
            , Long.class
            , "concurrent.migrations.per.target.datastore"
            , "0"
            , "Limits number of migrations that can be handled per datastore concurrently; default is 0 - unlimited"
            , true // not sure if this is to be dynamic
            , ConfigKey.Scope.Global);

    /**
     * Creates the database object for a volume based on the given criteria
     *
     * @param cmd
     *            the API command wrapping the criteria (account/domainId [admin only], zone, diskOffering, snapshot,
     *            name)
     * @return the volume object
     */
    Volume allocVolume(CreateVolumeCmd cmd) throws ResourceAllocationException;

    /**
     * Creates the volume based on the given criteria
     *
     * @param cmd
     *            the API command wrapping the criteria (account/domainId [admin only], zone, diskOffering, snapshot,
     *            name)
     * @return the volume object
     */
    Volume createVolume(CreateVolumeCmd cmd);

    /**
     * Resizes the volume based on the given criteria
     *
     * @param cmd
     *            the API command wrapping the criteria
     * @return the volume object
     * @throws ResourceAllocationException
     */
    Volume resizeVolume(ResizeVolumeCmd cmd) throws ResourceAllocationException;

    Volume migrateVolume(MigrateVolumeCmd cmd);

    /**
     * Uploads the volume to secondary storage
     *
     * @return Volume object
     */
    Volume uploadVolume(UploadVolumeCmd cmd) throws ResourceAllocationException;

    GetUploadParamsResponse uploadVolume(GetUploadParamsForVolumeCmd cmd) throws ResourceAllocationException, MalformedURLException;

    boolean deleteVolume(long volumeId, Account caller);

    Volume attachVolumeToVM(AttachVolumeCmd command);

    Volume detachVolumeViaDestroyVM(long vmId, long volumeId);

    Volume detachVolumeFromVM(DetachVolumeCmd cmd);

    Snapshot takeSnapshot(Long volumeId, Long policyId, Long snapshotId, Account account, boolean quiescevm, Snapshot.LocationType locationType, boolean asyncBackup)
            throws ResourceAllocationException;

    Snapshot allocSnapshot(Long volumeId, Long policyId, String snapshotName, Snapshot.LocationType locationType) throws ResourceAllocationException;

    Volume updateVolume(long volumeId, String path, String state, Long storageId, Boolean displayVolume, String customId, long owner, String chainInfo);

    /**
     * Extracts the volume to a particular location.
     *
     * @param cmd
     *            the command specifying url (where the volume needs to be extracted to), zoneId (zone where the volume exists),
     *            id (the id of the volume)
     */
    String extractVolume(ExtractVolumeCmd cmd);

    boolean isDisplayResourceEnabled(Long id);

    void updateDisplay(Volume volume, Boolean displayVolume);

    Snapshot allocSnapshotForVm(Long vmId, Long volumeId, String snapshotName) throws ResourceAllocationException;

    /**
     *  Checks if the target storage supports the disk offering.
     *  This validation is consistent with the mechanism used to select a storage pool to deploy a volume when a virtual machine is deployed or when a data disk is allocated.
     *
     *  The scenarios when this method returns true or false is presented in the following table.
     *   <table border="1">
     *      <tr>
     *          <th>#</th><th>Disk offering tags</th><th>Storage tags</th><th>Does the storage support the disk offering?</th>
     *      </tr>
     *      <body>
     *      <tr>
     *          <td>1</td><td>A,B</td><td>A</td><td>NO</td>
     *      </tr>
     *      <tr>
     *          <td>2</td><td>A,B,C</td><td>A,B,C,D,X</td><td>YES</td>
     *      </tr>
     *      <tr>
     *          <td>3</td><td>A,B,C</td><td>X,Y,Z</td><td>NO</td>
     *      </tr>
     *      <tr>
     *          <td>4</td><td>null</td><td>A,S,D</td><td>YES</td>
     *      </tr>
     *      <tr>
     *          <td>5</td><td>A</td><td>null</td><td>NO</td>
     *      </tr>
     *      <tr>
     *          <td>6</td><td>null</td><td>null</td><td>YES</td>
     *      </tr>
     *      </body>
     *   </table>
     */
    boolean doesTargetStorageSupportDiskOffering(StoragePool destPool, String diskOfferingTags);
}