/**
 * Describe Volumes Action Sample
 * Describes the status of the indicated or, in lieu of any specified,  all volumes belonging to the caller. Volumes that have been deleted are not described.
 *   
 * @param Amazon_EC2_Interface $service instance of Amazon_EC2_Interface
 * @param mixed $request Amazon_EC2_Model_DescribeVolumes or array of parameters
 */
function invokeDescribeVolumes(Amazon_EC2_Interface $service, $request)
{
    try {
        $response = $service->describeVolumes($request);
        echo "Service Response\n";
        echo "=============================================================================\n";
        echo "        DescribeVolumesResponse\n";
        if ($response->isSetDescribeVolumesResult()) {
            echo "            DescribeVolumesResult\n";
            $describeVolumesResult = $response->getDescribeVolumesResult();
            $volumeList = $describeVolumesResult->getVolume();
            foreach ($volumeList as $volume) {
                echo "                Volume\n";
                if ($volume->isSetVolumeId()) {
                    echo "                    VolumeId\n";
                    echo "                        " . $volume->getVolumeId() . "\n";
                }
                if ($volume->isSetSize()) {
                    echo "                    Size\n";
                    echo "                        " . $volume->getSize() . "\n";
                }
                if ($volume->isSetSnapshotId()) {
                    echo "                    SnapshotId\n";
                    echo "                        " . $volume->getSnapshotId() . "\n";
                }
                if ($volume->isSetAvailabilityZone()) {
                    echo "                    AvailabilityZone\n";
                    echo "                        " . $volume->getAvailabilityZone() . "\n";
                }
                if ($volume->isSetStatus()) {
                    echo "                    Status\n";
                    echo "                        " . $volume->getStatus() . "\n";
                }
                if ($volume->isSetCreateTime()) {
                    echo "                    CreateTime\n";
                    echo "                        " . $volume->getCreateTime() . "\n";
                }
                $attachmentList = $volume->getAttachment();
                foreach ($attachmentList as $attachment) {
                    echo "                    Attachment\n";
                    if ($attachment->isSetVolumeId()) {
                        echo "                        VolumeId\n";
                        echo "                            " . $attachment->getVolumeId() . "\n";
                    }
                    if ($attachment->isSetInstanceId()) {
                        echo "                        InstanceId\n";
                        echo "                            " . $attachment->getInstanceId() . "\n";
                    }
                    if ($attachment->isSetDevice()) {
                        echo "                        Device\n";
                        echo "                            " . $attachment->getDevice() . "\n";
                    }
                    if ($attachment->isSetStatus()) {
                        echo "                        Status\n";
                        echo "                            " . $attachment->getStatus() . "\n";
                    }
                    if ($attachment->isSetAttachTime()) {
                        echo "                        AttachTime\n";
                        echo "                            " . $attachment->getAttachTime() . "\n";
                    }
                }
            }
        }
        if ($response->isSetResponseMetadata()) {
            echo "            ResponseMetadata\n";
            $responseMetadata = $response->getResponseMetadata();
            if ($responseMetadata->isSetRequestId()) {
                echo "                RequestId\n";
                echo "                    " . $responseMetadata->getRequestId() . "\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";
    }
}