blob: faff469e90092964785c6c3a7265ac34701bd8fc [file] [log] [blame]
/*
* 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.
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* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
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*
* - 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
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* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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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();
}
}