/**
* Writes the query results to the HTTP response output stream.
*
* @param resp
* @param writer
* @param request
* @param response
* @param updateCountsFor
* @throws IOException
*/
protected final void stringResponse(
ServiceResponse resp,
Writer writer,
HttpServletRequest request,
HttpServletResponse response,
Set<LogEvent> updateCountsFor)
throws IOException {
if (resp instanceof ErrorResponse) {
errorResponse(
((ErrorResponse) resp).getStatus(),
((ErrorResponse) resp).toString(),
request,
response,
updateCountsFor);
} else if (resp.isEmpty()) {
log.warn(
"stringResponse: I got an empty ServiceResponce "
+ "(must be already converted to the ErrorResponse)");
errorResponse(NO_RESULTS_FOUND, "no results found", request, response, updateCountsFor);
} else {
response.setContentType("text/plain");
DataResponse dresp = (DataResponse) resp;
log.debug("QUERY RETURNED " + dresp.getData().toString().length() + " chars");
// take care to count provider's data accessed events
Set<String> providers = dresp.getProviders();
updateCountsFor.addAll(LogEvent.fromProviders(providers));
// log to the db (for analysis and reporting)
// problems with logging subsystem should not fail the entire service
try {
service.log(updateCountsFor, clientIpAddress(request));
} catch (Throwable ex) {
log.error("LogUtils.log failed", ex);
}
if (dresp.getData() instanceof Path) {
File resultFile = ((Path) dresp.getData()).toFile(); // this is some temp. file
response.setHeader("Content-Length", String.valueOf(resultFile.length()));
FileReader reader = new FileReader(resultFile);
IOUtils.copyLarge(reader, writer);
response.flushBuffer();
reader.close();
resultFile.delete();
} else {
writer.write(dresp.getData().toString());
response.flushBuffer();
}
}
}
/**
* Http error response from the error bean.
*
* @param status
* @param detailedMsg
* @param request
* @param response
* @param updateCountsFor
* @throws IOException
*/
protected final void errorResponse(
Status status,
String detailedMsg,
HttpServletRequest request,
HttpServletResponse response,
Set<LogEvent> updateCountsFor)
throws IOException {
if (updateCountsFor == null) updateCountsFor = new HashSet<LogEvent>();
// to count the error (code), also add -
updateCountsFor.add(LogEvent.from(status));
// problems with logging subsystem should not fail the entire service
try {
service.log(updateCountsFor, clientIpAddress(request));
} catch (Throwable ex) {
log.error("LogUtils.log failed", ex);
}
response.sendError(status.getErrorCode(), status.getErrorMsg() + "; " + detailedMsg);
}
