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- /*
- * 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.Repository;
-
- /** Updates any reference stored by {@link RefDirectory}. */
- class RefDirectoryUpdate extends RefUpdate {
- private final RefDirectory database;
-
- private boolean shouldDeref;
- private LockFile lock;
-
- RefDirectoryUpdate(final RefDirectory r, final Ref ref) {
- super(ref);
- database = r;
- }
-
- @Override
- protected RefDirectory getRefDatabase() {
- return database;
- }
-
- @Override
- protected Repository getRepository() {
- return database.getRepository();
- }
-
- @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.getRef(name);
- setOldObjectId(dst != null ? dst.getObjectId() : null);
- return true;
- } else {
- return false;
- }
- }
-
- @Override
- protected void unlock() {
- if (lock != null) {
- lock.unlock();
- lock = null;
- }
- }
-
- @Override
- protected Result doUpdate(final 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(this, msg, shouldDeref);
- }
- if (!lock.commit())
- return Result.LOCK_FAILURE;
- database.stored(this, lock.getCommitSnapshot());
- return status;
- }
-
- private String toResultString(final Result status) {
- switch (status) {
- case FORCED:
- return "forced-update"; //$NON-NLS-1$
- case FAST_FORWARD:
- return "fast forward"; //$NON-NLS-1$
- case NEW:
- return "created"; //$NON-NLS-1$
- default:
- return null;
- }
- }
-
- @Override
- protected Result doDelete(final Result status) throws IOException {
- if (getRef().getStorage() != Ref.Storage.NEW)
- database.delete(this);
- return status;
- }
-
- @Override
- protected Result doLink(final 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(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;
- }
- }
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