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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
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package org.apache.cloudstack.api.command.admin.systemvm;

import org.apache.log4j.Logger;

import org.apache.cloudstack.api.APICommand;
import org.apache.cloudstack.api.ApiCommandJobType;
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.SystemVmResponse;
import org.apache.cloudstack.context.CallContext;

import com.cloud.event.EventTypes;
import com.cloud.user.Account;
import com.cloud.vm.VirtualMachine;

@APICommand(name = "startSystemVm", responseObject = SystemVmResponse.class, description = "Starts a system virtual machine.")
public class StartSystemVMCmd extends BaseAsyncCmd {
    public static final Logger s_logger = Logger.getLogger(StartSystemVMCmd.class.getName());

    private static final String s_name = "startsystemvmresponse";

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

    @Parameter(name = ApiConstants.ID,
               type = CommandType.UUID,
               entityType = SystemVmResponse.class,
               required = true,
               description = "The ID of the system virtual machine")
    private Long id;

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

    public Long getId() {
        return id;
    }

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

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

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

    @Override
    public long getEntityOwnerId() {
        Account account = CallContext.current().getCallingAccount();
        if (account != null) {
            return account.getId();
        }

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

    @Override
    public String getEventType() {
        VirtualMachine.Type type = _mgr.findSystemVMTypeById(getId());
        if (type == VirtualMachine.Type.ConsoleProxy) {
            return EventTypes.EVENT_PROXY_START;
        } else {
            return EventTypes.EVENT_SSVM_START;
        }
    }

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

    @Override
    public ApiCommandJobType getInstanceType() {
        return ApiCommandJobType.SystemVm;
    }

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

    @Override
    public void execute() {
        CallContext.current().setEventDetails("Vm Id: " + getId());
        VirtualMachine instance = _mgr.startSystemVM(getId());
        if (instance != null) {
            SystemVmResponse response = _responseGenerator.createSystemVmResponse(instance);
            response.setResponseName(getCommandName());
            this.setResponseObject(response);
        } else {
            throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Fail to start system vm");
        }
    }
}
