RefTreeBatch.java
- /*
- * Copyright (C) 2016, Google Inc.
- * 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.reftree;
- import static org.eclipse.jgit.lib.Constants.OBJ_TREE;
- import static org.eclipse.jgit.transport.ReceiveCommand.Result.NOT_ATTEMPTED;
- import static org.eclipse.jgit.transport.ReceiveCommand.Result.OK;
- import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_NONFASTFORWARD;
- import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_OTHER_REASON;
- import static org.eclipse.jgit.transport.ReceiveCommand.Type.UPDATE;
- import static org.eclipse.jgit.transport.ReceiveCommand.Type.UPDATE_NONFASTFORWARD;
- import java.io.IOException;
- import java.text.MessageFormat;
- import java.util.ArrayList;
- import java.util.List;
- import org.eclipse.jgit.annotations.Nullable;
- import org.eclipse.jgit.internal.JGitText;
- import org.eclipse.jgit.lib.BatchRefUpdate;
- import org.eclipse.jgit.lib.CommitBuilder;
- import org.eclipse.jgit.lib.NullProgressMonitor;
- import org.eclipse.jgit.lib.ObjectId;
- import org.eclipse.jgit.lib.ObjectInserter;
- import org.eclipse.jgit.lib.ObjectReader;
- import org.eclipse.jgit.lib.PersonIdent;
- import org.eclipse.jgit.lib.ProgressMonitor;
- import org.eclipse.jgit.lib.Ref;
- import org.eclipse.jgit.lib.Repository;
- import org.eclipse.jgit.revwalk.RevCommit;
- import org.eclipse.jgit.revwalk.RevWalk;
- import org.eclipse.jgit.transport.ReceiveCommand;
- /** Batch update a {@link RefTreeDatabase}. */
- class RefTreeBatch extends BatchRefUpdate {
- private final RefTreeDatabase refdb;
- private Ref src;
- private ObjectId parentCommitId;
- private ObjectId parentTreeId;
- private RefTree tree;
- private PersonIdent author;
- private ObjectId newCommitId;
- RefTreeBatch(RefTreeDatabase refdb) {
- super(refdb);
- this.refdb = refdb;
- }
- /** {@inheritDoc} */
- @Override
- public void execute(RevWalk rw, ProgressMonitor monitor)
- throws IOException {
- List<Command> todo = new ArrayList<>(getCommands().size());
- for (ReceiveCommand c : getCommands()) {
- if (!isAllowNonFastForwards()) {
- if (c.getType() == UPDATE) {
- c.updateType(rw);
- }
- if (c.getType() == UPDATE_NONFASTFORWARD) {
- c.setResult(REJECTED_NONFASTFORWARD);
- if (isAtomic()) {
- ReceiveCommand.abort(getCommands());
- return;
- } else {
- continue;
- }
- }
- }
- todo.add(new Command(rw, c));
- }
- init(rw);
- execute(rw, todo);
- }
- void init(RevWalk rw) throws IOException {
- src = refdb.getBootstrap().exactRef(refdb.getTxnCommitted());
- if (src != null && src.getObjectId() != null) {
- RevCommit c = rw.parseCommit(src.getObjectId());
- parentCommitId = c;
- parentTreeId = c.getTree();
- tree = RefTree.read(rw.getObjectReader(), c.getTree());
- } else {
- parentCommitId = ObjectId.zeroId();
- parentTreeId = new ObjectInserter.Formatter()
- .idFor(OBJ_TREE, new byte[] {});
- tree = RefTree.newEmptyTree();
- }
- }
- @Nullable
- Ref exactRef(ObjectReader reader, String name) throws IOException {
- return tree.exactRef(reader, name);
- }
- /**
- * Execute an update from {@link RefTreeUpdate} or {@link RefTreeRename}.
- *
- * @param rw
- * current RevWalk handling the update or rename.
- * @param todo
- * commands to execute. Must never be a bootstrap reference name.
- * @throws IOException
- * the storage system is unable to read or write data.
- */
- void execute(RevWalk rw, List<Command> todo) throws IOException {
- for (Command c : todo) {
- if (c.getResult() != NOT_ATTEMPTED) {
- Command.abort(todo, null);
- return;
- }
- if (refdb.conflictsWithBootstrap(c.getRefName())) {
- c.setResult(REJECTED_OTHER_REASON, MessageFormat
- .format(JGitText.get().invalidRefName, c.getRefName()));
- Command.abort(todo, null);
- return;
- }
- }
- if (apply(todo) && newCommitId != null) {
- commit(rw, todo);
- }
- }
- private boolean apply(List<Command> todo) throws IOException {
- if (!tree.apply(todo)) {
- // apply set rejection information on commands.
- return false;
- }
- Repository repo = refdb.getRepository();
- try (ObjectInserter ins = repo.newObjectInserter()) {
- CommitBuilder b = new CommitBuilder();
- b.setTreeId(tree.writeTree(ins));
- if (parentTreeId.equals(b.getTreeId())) {
- for (Command c : todo) {
- c.setResult(OK);
- }
- return true;
- }
- if (!parentCommitId.equals(ObjectId.zeroId())) {
- b.setParentId(parentCommitId);
- }
- author = getRefLogIdent();
- if (author == null) {
- author = new PersonIdent(repo);
- }
- b.setAuthor(author);
- b.setCommitter(author);
- b.setMessage(getRefLogMessage());
- newCommitId = ins.insert(b);
- ins.flush();
- }
- return true;
- }
- private void commit(RevWalk rw, List<Command> todo) throws IOException {
- ReceiveCommand commit = new ReceiveCommand(
- parentCommitId, newCommitId,
- refdb.getTxnCommitted());
- updateBootstrap(rw, commit);
- if (commit.getResult() == OK) {
- for (Command c : todo) {
- c.setResult(OK);
- }
- } else {
- Command.abort(todo, commit.getResult().name());
- }
- }
- private void updateBootstrap(RevWalk rw, ReceiveCommand commit)
- throws IOException {
- BatchRefUpdate u = refdb.getBootstrap().newBatchUpdate();
- u.setAllowNonFastForwards(true);
- u.setPushCertificate(getPushCertificate());
- if (isRefLogDisabled()) {
- u.disableRefLog();
- } else {
- u.setRefLogIdent(author);
- u.setRefLogMessage(getRefLogMessage(), false);
- }
- u.addCommand(commit);
- u.execute(rw, NullProgressMonitor.INSTANCE);
- }
- }