| /* |
| * Copyright (C) 2009-2010, Google Inc. |
| * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org> |
| * 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.internal.storage.file; |
| |
| import static org.eclipse.jgit.lib.Constants.encode; |
| |
| import java.io.IOException; |
| |
| import org.eclipse.jgit.lib.Ref; |
| import org.eclipse.jgit.lib.RefUpdate; |
| import org.eclipse.jgit.lib.ReflogEntry; |
| import org.eclipse.jgit.lib.Repository; |
| |
| /** Updates any reference stored by {@link RefDirectory}. */ |
| class RefDirectoryUpdate extends RefUpdate { |
| private final RefDirectory database; |
| |
| private boolean shouldDeref; |
| private LockFile lock; |
| |
| RefDirectoryUpdate(RefDirectory r, Ref ref) { |
| super(ref); |
| database = r; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected RefDirectory getRefDatabase() { |
| return database; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected Repository getRepository() { |
| return database.getRepository(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected boolean tryLock(boolean deref) throws IOException { |
| shouldDeref = deref; |
| Ref dst = getRef(); |
| if (deref) |
| dst = dst.getLeaf(); |
| String name = dst.getName(); |
| lock = new LockFile(database.fileFor(name)); |
| if (lock.lock()) { |
| dst = database.findRef(name); |
| setOldObjectId(dst != null ? dst.getObjectId() : null); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected void unlock() { |
| if (lock != null) { |
| lock.unlock(); |
| lock = null; |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected Result doUpdate(Result status) throws IOException { |
| WriteConfig wc = database.getRepository().getConfig() |
| .get(WriteConfig.KEY); |
| |
| lock.setFSync(wc.getFSyncRefFiles()); |
| lock.setNeedStatInformation(true); |
| lock.write(getNewObjectId()); |
| |
| String msg = getRefLogMessage(); |
| if (msg != null) { |
| if (isRefLogIncludingResult()) { |
| String strResult = toResultString(status); |
| if (strResult != null) { |
| if (msg.length() > 0) |
| msg = msg + ": " + strResult; //$NON-NLS-1$ |
| else |
| msg = strResult; |
| } |
| } |
| database.log(isForceRefLog(), this, msg, shouldDeref); |
| } |
| if (!lock.commit()) |
| return Result.LOCK_FAILURE; |
| database.stored(this, lock.getCommitSnapshot()); |
| return status; |
| } |
| |
| private String toResultString(Result status) { |
| switch (status) { |
| case FORCED: |
| return ReflogEntry.PREFIX_FORCED_UPDATE; |
| case FAST_FORWARD: |
| return ReflogEntry.PREFIX_FAST_FORWARD; |
| case NEW: |
| return ReflogEntry.PREFIX_CREATED; |
| default: |
| return null; |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected Result doDelete(Result status) throws IOException { |
| if (getRef().getStorage() != Ref.Storage.NEW) |
| database.delete(this); |
| return status; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected Result doLink(String target) throws IOException { |
| WriteConfig wc = database.getRepository().getConfig() |
| .get(WriteConfig.KEY); |
| |
| lock.setFSync(wc.getFSyncRefFiles()); |
| lock.setNeedStatInformation(true); |
| lock.write(encode(RefDirectory.SYMREF + target + '\n')); |
| |
| String msg = getRefLogMessage(); |
| if (msg != null) |
| database.log(isForceRefLog(), this, msg, false); |
| if (!lock.commit()) |
| return Result.LOCK_FAILURE; |
| database.storedSymbolicRef(this, lock.getCommitSnapshot(), target); |
| |
| if (getRef().getStorage() == Ref.Storage.NEW) |
| return Result.NEW; |
| return Result.FORCED; |
| } |
| } |