/**
* Cleans up the given store.
*
* @param crdf could be a triple or a quad store.
* @throws CumulusStoreException in case the cleanup fails.
*/
public static void clean(final Store crdf) throws CumulusStoreException {
crdf.clear();
assertEquals(
"Store seems not empty after issuing a delete * command.",
0,
numOfRes(
crdf.query(
crdf instanceof TripleStore
? SELECT_ALL_TRIPLES_PATTERN
: SELECT_ALL_QUADS_PATTERN)));
}
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws IOException, ServletException {
long start = System.currentTimeMillis();
ServletContext ctx = getServletContext();
if (req.getCharacterEncoding() == null) req.setCharacterEncoding("UTF-8");
resp.setCharacterEncoding("UTF-8");
String accept = req.getHeader("Accept");
SerializationFormat formatter = Listener.getSerializationFormat(accept);
if (formatter == null) {
sendError(
ctx,
req,
resp,
HttpServletResponse.SC_NOT_ACCEPTABLE,
"no known mime type in Accept header");
return;
}
PrintWriter out_r = resp.getWriter();
String resp_msg = "";
// check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(req);
if (!isMultipart) {
sendError(ctx, req, resp, HttpServletResponse.SC_NOT_ACCEPTABLE, "no file upload");
return;
}
// Create a factory for disk-based file items
FileItemFactory factory = new DiskFileItemFactory();
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// Parse the request
try {
List<FileItem> items = upload.parseRequest(req);
// bulk load options
int threads = -1;
String format = "nt";
int batchSizeMB = 1;
// get store
AbstractCassandraRdfHector crdf =
(AbstractCassandraRdfHector) ctx.getAttribute(Listener.STORE);
crdf.setBatchSize(batchSizeMB);
// Process the uploaded items
Iterator iter = items.iterator();
String a = "";
String graph = "";
boolean a_exists = false;
String file = "";
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
if (item.isFormField()) {
String name = item.getFieldName();
String value = item.getString();
if (name.equals("g")) {
a_exists = true;
a = new String(value);
// escape if the accept header is not text/plain
graph = new String(a);
if (formatter.getContentType().equals("text/html")) graph = escapeHtml(a);
}
} else {
String fieldName = item.getFieldName();
String fileName = item.getName();
String contentType = item.getContentType();
boolean isInMemory = item.isInMemory();
long sizeInBytes = item.getSize();
// Process a file upload
InputStream uploadedStream = item.getInputStream();
// write the inputStream to a FileOutputStream
file = "/tmp/upload_bulkload_" + UUID.randomUUID();
OutputStream out = new FileOutputStream(new File(file));
int read = 0;
byte[] bytes = new byte[1024];
while ((read = uploadedStream.read(bytes)) != -1) {
out.write(bytes, 0, read);
}
uploadedStream.close();
out.flush();
out.close();
resp_msg += "Bulkload " + fileName + ", size " + sizeInBytes;
}
}
if (!a_exists || a == null || a.isEmpty()) {
sendError(
ctx,
req,
resp,
HttpServletResponse.SC_BAD_REQUEST,
"Please pass also the graph name as 'g' parameter");
} else {
if (!a.startsWith("<") || !a.endsWith(">")) {
sendError(
ctx,
req,
resp,
HttpServletResponse.SC_BAD_REQUEST,
"Please pass a resource as the graph name.");
return;
}
// load here
// note: if threads==-1, it will be then set to the number of hosts
if (crdf.bulkLoad(new File(file), format, threads, Store.encodeKeyspace(a)) == 1)
sendError(
ctx,
req,
resp,
HttpServletResponse.SC_CONFLICT,
"Graph " + graph + " does not exist yet. Please create it before bulk loading.");
else {
resp_msg = "Graph " + graph + " time " + (System.currentTimeMillis() - start) + "ms";
sendResponse(ctx, req, resp, HttpServletResponse.SC_BAD_REQUEST, resp_msg);
_log.info(resp_msg);
}
}
// delete the tmp file
new File(file).delete();
out_r.println(resp_msg);
out_r.close();
} catch (FileUploadException ex) {
ex.printStackTrace();
return;
} catch (StoreException ex) {
ex.printStackTrace();
return;
}
return;
}
