LfsProtocolServlet: Pass request and path to getLargeFileRepository

Passing the request and path to the method will allow implementations
to have more control over determination of the backend, for example:

- return different backends for different requests
- accept or refuse requests based on request characteristics
- etc

Change-Id: I1ec6ec54c91a5f0601b620ed18846eb4a3f46783
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.lfs.server/src/org/eclipse/jgit/lfs/server/LfsProtocolServlet.java

@@ -82,40 +82,57 @@ public abstract class LfsProtocolServlet extends HttpServlet {
 	/**
 	 * Get the large file repository
 	 *
-	 * @return the large file repository storing large files
+	 * @param request
+	 *            the request
+	 * @param path
+	 *            the path
+	 *
+	 * @return the large file repository storing large files or null if the
+	 *         request is not supported.
 	 */
-	protected abstract LargeFileRepository getLargeFileRepository();
+	protected abstract LargeFileRepository getLargeFileRepository(
+			LfsRequest request, String path);
+
+	/** LFS request. */
+	protected static class LfsRequest {
+		private String operation;
+
+		private List<LfsObject> objects;
+
+		/**
+		 * Get the LFS operation.
+		 *
+		 * @return the operation
+		 */
+		public String getOperation() {
+			return operation;
+		}
+	}
 
 	@Override
 	protected void doPost(HttpServletRequest req, HttpServletResponse res)
 			throws ServletException, IOException {
-		res.setStatus(SC_OK);
-		res.setContentType(CONTENTTYPE_VND_GIT_LFS_JSON);
-
 		Writer w = new BufferedWriter(
 				new OutputStreamWriter(res.getOutputStream(), UTF_8));
 
 		Reader r = new BufferedReader(new InputStreamReader(req.getInputStream(), UTF_8));
 		LfsRequest request = gson.fromJson(r, LfsRequest.class);
+		String path = req.getPathInfo();
 
-		LargeFileRepository repo = getLargeFileRepository();
+		LargeFileRepository repo = getLargeFileRepository(request, path);
 		if (repo == null) {
 			res.setStatus(SC_SERVICE_UNAVAILABLE);
 			return;
 		}
 
+		res.setStatus(SC_OK);
+		res.setContentType(CONTENTTYPE_VND_GIT_LFS_JSON);
 		TransferHandler handler = TransferHandler
 				.forOperation(request.operation, repo, request.objects);
 		gson.toJson(handler.process(), w);
 		w.flush();
 	}
 
-	private static class LfsRequest {
-		String operation;
-
-		List<LfsObject> objects;
-	}
-
 	private static Gson createGson() {
 		GsonBuilder gb = new GsonBuilder()
 				.setFieldNamingPolicy(

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/debug/LfsStore.java

@@ -253,10 +253,10 @@ protected void run() throws Exception {
 			private static final long serialVersionUID = 1L;
 
 			@Override
-			protected LargeFileRepository getLargeFileRepository() {
+			protected LargeFileRepository getLargeFileRepository(
+					LfsRequest request, String path) {
 				return repository;
 			}
-
 		};
 		app.addServlet(new ServletHolder(protocol), PROTOCOL_PATH);