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// 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.api.commands;

import javax.inject.Inject;

import org.apache.cloudstack.api.*;
import org.apache.log4j.Logger;

import org.apache.cloudstack.api.APICommand;
import com.cloud.api.response.F5LoadBalancerResponse;
import com.cloud.event.EventTypes;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.InvalidParameterValueException;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.exception.ResourceUnavailableException;
import com.cloud.network.dao.ExternalLoadBalancerDeviceVO;
import com.cloud.network.element.F5ExternalLoadBalancerElementService;
import com.cloud.user.UserContext;
import com.cloud.utils.exception.CloudRuntimeException;

@APICommand(name = "configureF5LoadBalancer", responseObject=F5LoadBalancerResponse.class, description="configures a F5 load balancer device")
public class ConfigureF5LoadBalancerCmd extends BaseAsyncCmd {

    public static final Logger s_logger = Logger.getLogger(ConfigureF5LoadBalancerCmd.class.getName());
    private static final String s_name = "configuref5Rloadbalancerresponse";
    @Inject F5ExternalLoadBalancerElementService _f5DeviceManagerService;

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

    @Parameter(name=ApiConstants.LOAD_BALANCER_DEVICE_ID, type=CommandType.UUID, entityType = F5LoadBalancerResponse.class,
            required=true, description="F5 load balancer device ID")
    private Long lbDeviceId;

    @Parameter(name=ApiConstants.LOAD_BALANCER_DEVICE_CAPACITY, type=CommandType.LONG, required=false, description="capacity of the device, Capacity will be interpreted as number of networks device can handle")
    private Long capacity;

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

    public Long getLoadBalancerDeviceId() {
        return lbDeviceId;
    }

    public Long getLoadBalancerCapacity() {
        return capacity;
    }

    /////////////////////////////////////////////////////
    /////////////// API Implementation///////////////////
    /////////////////////////////////////////////////////

    @Override
    public void execute() throws ResourceUnavailableException, InsufficientCapacityException, ServerApiException, ConcurrentOperationException, ResourceAllocationException {
        try {
            ExternalLoadBalancerDeviceVO lbDeviceVO = _f5DeviceManagerService.configureF5LoadBalancer(this);
            if (lbDeviceVO != null) {
                F5LoadBalancerResponse response = _f5DeviceManagerService.createF5LoadBalancerResponse(lbDeviceVO);
                response.setObjectName("f5loadbalancer");
                response.setResponseName(getCommandName());
                this.setResponseObject(response);
            } else {
                throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Failed to configure F5 load balancer due to internal error.");
            }
        }  catch (InvalidParameterValueException invalidParamExcp) {
            throw new ServerApiException(ApiErrorCode.PARAM_ERROR, invalidParamExcp.getMessage());
        } catch (CloudRuntimeException runtimeExcp) {
            throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, runtimeExcp.getMessage());
        }
    }

    @Override
    public String getEventDescription() {
        return "Configuring a F5 load balancer device";
    }

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

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

    @Override
    public long getEntityOwnerId() {
        return UserContext.current().getCaller().getId();
    }
}
