/* * 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. *

* 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 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(); } }