private void backup(ZipOutputStream zipOutputStream, CollectRecord summary, int stepNumber) {
Integer id = summary.getId();
try {
CollectRecord record = recordManager.load(survey, id, stepNumber);
String entryFileName = buildEntryFileName(record, stepNumber);
ZipEntry entry = new ZipEntry(entryFileName);
zipOutputStream.putNextEntry(entry);
OutputStreamWriter writer = new OutputStreamWriter(zipOutputStream);
dataMarshaller.write(record, writer);
zipOutputStream.closeEntry();
zipOutputStream.flush();
} catch (Exception e) {
String message = "Error while backing up " + id + " " + e.getMessage();
if (LOG.isErrorEnabled()) {
LOG.error(message, e);
}
throw new RuntimeException(message, e);
}
}