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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
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// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
package org.apache.cloudstack.api.command.admin.internallb;

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.DomainRouterResponse;
import org.apache.log4j.Logger;

import com.cloud.async.AsyncJob;
import com.cloud.event.EventTypes;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.InvalidParameterValueException;
import com.cloud.exception.ResourceUnavailableException;
import com.cloud.network.router.VirtualRouter;
import com.cloud.network.router.VirtualRouter.Role;
import com.cloud.user.UserContext;

@APICommand(name = "startInternalLoadBalancerVM", responseObject=DomainRouterResponse.class, description="Starts an existing internal lb vm.")
public class StartInternalLBVMCmd extends BaseAsyncCmd {
    public static final Logger s_logger = Logger.getLogger(StartInternalLBVMCmd.class.getName());
    private static final String s_name = "startinternallbvmresponse";


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

    @Parameter(name=ApiConstants.ID, type=CommandType.UUID, entityType=DomainRouterResponse.class,
            required=true, description="the ID of the internal lb vm")
    private Long id;

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

    public Long getId() {
        return id;
    }

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

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

    public static String getResultObjectName() {
        return "router";
    }

    @Override
    public long getEntityOwnerId() {
        VirtualRouter router = _entityMgr.findById(VirtualRouter.class, getId());
        if (router != null && router.getRole() == Role.INTERNAL_LB_VM) {
            return router.getAccountId();
        } else {
            throw new InvalidParameterValueException("Unable to find internal lb vm by id");
        } 
    }

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

    @Override
    public String getEventDescription() {
        return  "starting internal lb vm: " + getId();
    }

    public AsyncJob.Type getInstanceType() {
        return AsyncJob.Type.InternalLbVm;
    }

    public Long getInstanceId() {
        return getId();
    }

    @Override
    public void execute() throws ConcurrentOperationException, ResourceUnavailableException, InsufficientCapacityException{
        UserContext.current().setEventDetails("Internal Lb Vm Id: "+getId());
        VirtualRouter result = null;
        VirtualRouter router = _routerService.findRouter(getId());
        if (router == null || router.getRole() != Role.INTERNAL_LB_VM) {
            throw new InvalidParameterValueException("Can't find internal lb vm by id");
        } else {
            result = _internalLbSvc.startInternalLbVm(getId(), UserContext.current().getCaller(), UserContext.current().getCallerUserId());
        }
        
        if (result != null){
            DomainRouterResponse routerResponse = _responseGenerator.createDomainRouterResponse(result);
            routerResponse.setResponseName(getCommandName());
            this.setResponseObject(routerResponse);
        } else {
            throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Failed to start internal lb vm");
        }
    }
}
