/**
 * Attach Vpn Gateway Action Sample
 * Attaches a VPN gateway to a VPC. This is the last step required to get your
 * VPC fully connected to your data center before launching instances in it.
 * For more information, go to Process for Using Amazon VPC in the Amazon Virtual
 * Private Cloud Developer Guide.  
 * @param Amazon_EC2_Interface $service instance of Amazon_EC2_Interface
 * @param mixed $request Amazon_EC2_Model_AttachVpnGateway or array of parameters
 */
function invokeAttachVpnGateway(Amazon_EC2_Interface $service, $request)
{
    try {
        $response = $service->attachVpnGateway($request);
        echo "Service Response\n";
        echo "=============================================================================\n";
        echo "        AttachVpnGatewayResponse\n";
        if ($response->isSetResponseMetadata()) {
            echo "            ResponseMetadata\n";
            $responseMetadata = $response->getResponseMetadata();
            if ($responseMetadata->isSetRequestId()) {
                echo "                RequestId\n";
                echo "                    " . $responseMetadata->getRequestId() . "\n";
            }
        }
        if ($response->isSetAttachVpnGatewayResult()) {
            echo "            AttachVpnGatewayResult\n";
            $attachVpnGatewayResult = $response->getAttachVpnGatewayResult();
            if ($attachVpnGatewayResult->isSetVpcAttachment()) {
                echo "                VpcAttachment\n";
                $vpcAttachment = $attachVpnGatewayResult->getVpcAttachment();
                if ($vpcAttachment->isSetVpcId()) {
                    echo "                    VpcId\n";
                    echo "                        " . $vpcAttachment->getVpcId() . "\n";
                }
                if ($vpcAttachment->isSetVpcAttachmentState()) {
                    echo "                    VpcAttachmentState\n";
                    echo "                        " . $vpcAttachment->getVpcAttachmentState() . "\n";
                }
            }
        }
    } catch (Amazon_EC2_Exception $ex) {
        echo "Caught Exception: " . $ex->getMessage() . "\n";
        echo "Response Status Code: " . $ex->getStatusCode() . "\n";
        echo "Error Code: " . $ex->getErrorCode() . "\n";
        echo "Error Type: " . $ex->getErrorType() . "\n";
        echo "Request ID: " . $ex->getRequestId() . "\n";
        echo "XML: " . $ex->getXML() . "\n";
    }
}