/**
 * Describe Customer Gateways Action Sample
 * Gives you information about your customer gateways. You can filter the results to return
 * information only about customer gateways that match criteria you specify. For example,
 * you could ask to get information about a particular customer gateway (or all) only if
 * the gateway's state is pending or available. You can specify multiple filters (e.g.,
 * the customer gateway has a particular IP address for the Internet-routable external
 * interface, and the gateway's state is pending or available). The result includes
 * information for a particular customer gateway only if the gateway matches all  your
 * filters. If there's no match, no special message is returned; the response is simply empty.  
 * @param Amazon_EC2_Interface $service instance of Amazon_EC2_Interface
 * @param mixed $request Amazon_EC2_Model_DescribeCustomerGateways or array of parameters
 */
function invokeDescribeCustomerGateways(Amazon_EC2_Interface $service, $request)
{
    try {
        $response = $service->describeCustomerGateways($request);
        echo "Service Response\n";
        echo "=============================================================================\n";
        echo "        DescribeCustomerGatewaysResponse\n";
        if ($response->isSetResponseMetadata()) {
            echo "            ResponseMetadata\n";
            $responseMetadata = $response->getResponseMetadata();
            if ($responseMetadata->isSetRequestId()) {
                echo "                RequestId\n";
                echo "                    " . $responseMetadata->getRequestId() . "\n";
            }
        }
        if ($response->isSetDescribeCustomerGatewaysResult()) {
            echo "            DescribeCustomerGatewaysResult\n";
            $describeCustomerGatewaysResult = $response->getDescribeCustomerGatewaysResult();
            $customerGatewayList = $describeCustomerGatewaysResult->getCustomerGateway();
            foreach ($customerGatewayList as $customerGateway) {
                echo "                CustomerGateway\n";
                if ($customerGateway->isSetCustomerGatewayId()) {
                    echo "                    CustomerGatewayId\n";
                    echo "                        " . $customerGateway->getCustomerGatewayId() . "\n";
                }
                if ($customerGateway->isSetCustomerGatewayState()) {
                    echo "                    CustomerGatewayState\n";
                    echo "                        " . $customerGateway->getCustomerGatewayState() . "\n";
                }
                if ($customerGateway->isSetType()) {
                    echo "                    Type\n";
                    echo "                        " . $customerGateway->getType() . "\n";
                }
                if ($customerGateway->isSetIpAddress()) {
                    echo "                    IpAddress\n";
                    echo "                        " . $customerGateway->getIpAddress() . "\n";
                }
                if ($customerGateway->isSetBgpAsn()) {
                    echo "                    BgpAsn\n";
                    echo "                        " . $customerGateway->getBgpAsn() . "\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";
    }
}