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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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package org.apache.cloudstack.api.command.user.volume;

import org.apache.cloudstack.api.APICommand;
import org.apache.cloudstack.api.ApiConstants;
import org.apache.cloudstack.api.ApiErrorCode;
import org.apache.cloudstack.api.BaseAsyncCmd;
import org.apache.cloudstack.api.Parameter;
import org.apache.cloudstack.api.ServerApiException;
import org.apache.cloudstack.api.response.StoragePoolResponse;
import org.apache.cloudstack.api.response.VolumeResponse;

import com.cloud.event.EventTypes;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.storage.Volume;
import com.cloud.user.Account;


@APICommand(name = "migrateVolume", description="Migrate volume", responseObject=VolumeResponse.class, since="3.0.0")
public class MigrateVolumeCmd extends BaseAsyncCmd {
    private static final String s_name = "migratevolumeresponse";

     /////////////////////////////////////////////////////
    //////////////// API parameters /////////////////////
    /////////////////////////////////////////////////////

    @Parameter(name=ApiConstants.VOLUME_ID, type=CommandType.UUID, entityType=VolumeResponse.class,
            required=true, description="the ID of the volume")
    private Long volumeId;

    @Parameter(name=ApiConstants.STORAGE_ID, type=CommandType.UUID, entityType=StoragePoolResponse.class,
            required=true, description="destination storage pool ID to migrate the volume to")
    private Long storageId;

    @Parameter(name=ApiConstants.LIVE_MIGRATE, type=CommandType.BOOLEAN, required=false,
            description="if the volume should be live migrated when it is attached to a running vm")
    private Boolean liveMigrate;

    /////////////////////////////////////////////////////
    /////////////////// Accessors ///////////////////////
    /////////////////////////////////////////////////////

    public Long getVolumeId() {
        return volumeId;
    }

    public Long getStoragePoolId() {
        return storageId;
    }

    public boolean isLiveMigrate() {
        return (liveMigrate != null) ? liveMigrate : false;
    }
    /////////////////////////////////////////////////////
    /////////////// API Implementation///////////////////
    /////////////////////////////////////////////////////

    @Override
    public String getCommandName() {
        return s_name;
    }

    @Override
    public long getEntityOwnerId() {
          Volume volume = _entityMgr.findById(Volume.class, getVolumeId());
          if (volume != null) {
              return volume.getAccountId();
          }

          return Account.ACCOUNT_ID_SYSTEM; // no account info given, parent this command to SYSTEM so ERROR events are tracked
    }

    @Override
    public String getEventType() {
        return EventTypes.EVENT_VOLUME_MIGRATE;
    }

    @Override
    public String getEventDescription() {
        return  "Attempting to migrate volume Id: " + getVolumeId() + " to storage pool Id: "+ getStoragePoolId();
    }


    @Override
    public void execute(){
    	Volume result;

    	result = _volumeService.migrateVolume(this);
    	if (result != null) {
    		VolumeResponse response = _responseGenerator.createVolumeResponse(result);
    		response.setResponseName(getCommandName());
    		this.setResponseObject(response);
    	} else {
    		throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Failed to migrate volume");
    	}
    }

}
