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- /*
- * Copyright (C) 2011, 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.storage.dht;
-
- import java.io.IOException;
- import java.text.MessageFormat;
- import java.util.concurrent.TimeoutException;
-
- import org.eclipse.jgit.lib.Constants;
- import org.eclipse.jgit.lib.RefUpdate;
- import org.eclipse.jgit.lib.Repository;
- import org.eclipse.jgit.lib.StoredConfig;
- import org.eclipse.jgit.storage.dht.spi.Database;
- import org.eclipse.jgit.storage.file.ReflogReader;
-
- /**
- * A Git repository storing its objects and references in a DHT.
- * <p>
- * With the exception of repository creation, this class is thread-safe, but
- * readers created from it are not. When creating a new repository using the
- * {@link #create(boolean)} method, the newly constructed repository object does
- * not ensure the assigned {@link #getRepositoryKey()} will be visible to all
- * threads. Applications are encouraged to use their own synchronization when
- * sharing a Repository instance that was used to create a new repository.
- */
- public class DhtRepository extends Repository {
- private final RepositoryName name;
-
- private final Database db;
-
- private final DhtRefDatabase refdb;
-
- private final DhtObjDatabase objdb;
-
- private final DhtConfig config;
-
- private RepositoryKey key;
-
- /**
- * Initialize an in-memory representation of a DHT backed repository.
- *
- * @param builder
- * description of the repository and its data storage.
- */
- public DhtRepository(DhtRepositoryBuilder builder) {
- super(builder);
- this.name = RepositoryName.create(builder.getRepositoryName());
- this.key = builder.getRepositoryKey();
- this.db = builder.getDatabase();
-
- this.refdb = new DhtRefDatabase(this, db);
- this.objdb = new DhtObjDatabase(this, builder);
- this.config = new DhtConfig();
- }
-
- /** @return database cluster that houses this repository (among others). */
- public Database getDatabase() {
- return db;
- }
-
- /** @return human readable name used to open this repository. */
- public RepositoryName getRepositoryName() {
- return name;
- }
-
- /** @return unique identity of the repository in the {@link #getDatabase()}. */
- public RepositoryKey getRepositoryKey() {
- return key;
- }
-
- @Override
- public StoredConfig getConfig() {
- return config;
- }
-
- @Override
- public DhtRefDatabase getRefDatabase() {
- return refdb;
- }
-
- @Override
- public DhtObjDatabase getObjectDatabase() {
- return objdb;
- }
-
- @Override
- public void create(boolean bare) throws IOException {
- if (!bare)
- throw new IllegalArgumentException(
- DhtText.get().repositoryMustBeBare);
-
- if (getObjectDatabase().exists())
- throw new DhtException(MessageFormat.format(
- DhtText.get().repositoryAlreadyExists, name.asString()));
-
- try {
- key = db.repository().nextKey();
- db.repositoryIndex().putUnique(name, key);
- } catch (TimeoutException err) {
- throw new DhtTimeoutException(MessageFormat.format(
- DhtText.get().timeoutLocatingRepository, name), err);
- }
-
- String master = Constants.R_HEADS + Constants.MASTER;
- RefUpdate.Result result = updateRef(Constants.HEAD, true).link(master);
- if (result != RefUpdate.Result.NEW)
- throw new IOException(result.name());
- }
-
- @Override
- public void scanForRepoChanges() {
- refdb.clearCache();
- }
-
- @Override
- public void notifyIndexChanged() {
- // we do not support non-bare repositories yet
- }
-
- @Override
- public String toString() {
- return "DhtRepostitory[" + key + " / " + name + "]";
- }
-
- // TODO This method should be removed from the JGit API.
- @Override
- public ReflogReader getReflogReader(String refName) {
- throw new UnsupportedOperationException();
- }
- }
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