LfsProtocolServlet: Add support for insufficient storage error

Since [1], the git-lfs specification allows the server to return
HTTP 507 if there is insufficient storage for the uploaded object(s).

Add a new exception class, which implementations may throw from the
getRepository() method, causing HTTP 507 to be returned to the client.

[1] https://github.com/github/git-lfs/pull/1473

Change-Id: If5bc0a35fcf870d4216af6ca2f7c8924689ef9c5
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

2 files changed, 65 insertions, 0 deletions

diff --git a/org.eclipse.jgit.lfs.server/src/org/eclipse/jgit/lfs/server/LfsProtocolServlet.java b/org.eclipse.jgit.lfs.server/src/org/eclipse/jgit/lfs/server/LfsProtocolServlet.java
index d335b720bd..b0736bbc29 100644
--- a/org.eclipse.jgit.lfs.server/src/org/eclipse/jgit/lfs/server/LfsProtocolServlet.java
+++ b/org.eclipse.jgit.lfs.server/src/org/eclipse/jgit/lfs/server/LfsProtocolServlet.java
@@ -44,6 +44,7 @@ package org.eclipse.jgit.lfs.server;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static org.apache.http.HttpStatus.SC_FORBIDDEN;
+import static org.apache.http.HttpStatus.SC_INSUFFICIENT_STORAGE;
 import static org.apache.http.HttpStatus.SC_NOT_FOUND;
 import static org.apache.http.HttpStatus.SC_OK;
 import static org.apache.http.HttpStatus.SC_SERVICE_UNAVAILABLE;
@@ -65,6 +66,7 @@ import javax.servlet.http.HttpServletResponse;
 
 import org.eclipse.jgit.lfs.errors.LfsBandwidthLimitExceeded;
 import org.eclipse.jgit.lfs.errors.LfsException;
+import org.eclipse.jgit.lfs.errors.LfsInsufficientStorage;
 import org.eclipse.jgit.lfs.errors.LfsRateLimitExceeded;
 import org.eclipse.jgit.lfs.errors.LfsRepositoryNotFound;
 import org.eclipse.jgit.lfs.errors.LfsRepositoryReadOnly;
@@ -173,6 +175,8 @@ public abstract class LfsProtocolServlet extends HttpServlet {
 			sendError(res, w, SC_RATE_LIMIT_EXCEEDED, e.getMessage());
 		} catch (LfsBandwidthLimitExceeded e) {
 			sendError(res, w, SC_BANDWIDTH_LIMIT_EXCEEDED, e.getMessage());
+		} catch (LfsInsufficientStorage e) {
+			sendError(res, w, SC_INSUFFICIENT_STORAGE, e.getMessage());
 		} catch (LfsException e) {
 			sendError(res, w, SC_SERVICE_UNAVAILABLE, e.getMessage());
 		} finally {
diff --git a/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/errors/LfsInsufficientStorage.java b/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/errors/LfsInsufficientStorage.java
new file mode 100644
index 0000000000..016586770e
--- /dev/null
+++ b/org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/errors/LfsInsufficientStorage.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2016, David Pursehouse <david.pursehouse@gmail.com>
+ * and other copyright owners as documented in the project's IP log.
+ *
+ * This program and the accompanying materials are made available
+ * under the terms of the Eclipse Distribution License v1.0 which
+ * accompanies this distribution, is reproduced below, and is
+ * available at http://www.eclipse.org/org/documents/edl-v10.php
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials provided
+ *   with the distribution.
+ *
+ * - Neither the name of the Eclipse Foundation, Inc. nor the
+ *   names of its contributors may be used to endorse or promote
+ *   products derived from this software without specific prior
+ *   written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package org.eclipse.jgit.lfs.errors;
+
+/**
+ * Thrown when there is insufficient storage on the server.
+ *
+ * @since 4.5
+ *
+ */
+public class LfsInsufficientStorage extends LfsException {
+	private static final long serialVersionUID = 1L;
+
+	/**
+	 * @param message
+	 */
+	public LfsInsufficientStorage(String message) {
+		super(message);
+	}
+}