Browse Source
* changes: dfs: reftable backed DfsRefDatabase Support symbolic references in ReceiveCommandstable-4.10
Terry Parker
7 years ago
committed by
Gerrit Code Review @ Eclipse.org
11 changed files with 1132 additions and 28 deletions
@ -0,0 +1,361 @@
|
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/* |
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* Copyright (C) 2017, Google Inc. |
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* and other copyright owners as documented in the project's IP log. |
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* |
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* This program and the accompanying materials are made available |
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* under the terms of the Eclipse Distribution License v1.0 which |
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* accompanies this distribution, is reproduced below, and is |
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* available at http://www.eclipse.org/org/documents/edl-v10.php
|
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* |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials provided |
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* with the distribution. |
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* |
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* - Neither the name of the Eclipse Foundation, Inc. nor the |
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* names of its contributors may be used to endorse or promote |
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* products derived from this software without specific prior |
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* written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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package org.eclipse.jgit.internal.storage.dfs; |
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import java.io.IOException; |
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import java.util.Arrays; |
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import java.util.Map; |
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import java.util.concurrent.locks.ReentrantLock; |
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import org.eclipse.jgit.annotations.Nullable; |
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import org.eclipse.jgit.internal.storage.pack.PackExt; |
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import org.eclipse.jgit.internal.storage.reftable.MergedReftable; |
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import org.eclipse.jgit.internal.storage.reftable.RefCursor; |
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import org.eclipse.jgit.internal.storage.reftable.Reftable; |
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import org.eclipse.jgit.lib.BatchRefUpdate; |
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import org.eclipse.jgit.lib.NullProgressMonitor; |
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import org.eclipse.jgit.lib.ObjectId; |
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import org.eclipse.jgit.lib.Ref; |
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import org.eclipse.jgit.revwalk.RevWalk; |
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import org.eclipse.jgit.transport.ReceiveCommand; |
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import org.eclipse.jgit.util.RefList; |
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import org.eclipse.jgit.util.RefMap; |
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/** |
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* A {@link DfsRefDatabase} that uses reftable for storage. |
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* <p> |
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* A {@code DfsRefDatabase} instance is thread-safe. |
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* <p> |
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* Implementors may wish to use {@link DfsPackDescription#getMaxUpdateIndex()} |
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* as the primary key identifier for a {@link PackExt#REFTABLE} only pack |
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* description, ensuring that when there are competing transactions one wins, |
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* and one will fail. |
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*/ |
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public class DfsReftableDatabase extends DfsRefDatabase { |
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private final ReentrantLock lock = new ReentrantLock(true); |
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private DfsReader ctx; |
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private ReftableStack tableStack; |
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private MergedReftable mergedTables; |
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/** |
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* Initialize the reference database for a repository. |
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* |
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* @param repo |
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* the repository this database instance manages references for. |
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*/ |
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protected DfsReftableDatabase(DfsRepository repo) { |
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super(repo); |
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} |
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@Override |
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public boolean performsAtomicTransactions() { |
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return true; |
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} |
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@Override |
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public BatchRefUpdate newBatchUpdate() { |
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DfsObjDatabase odb = getRepository().getObjectDatabase(); |
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return new ReftableBatchRefUpdate(this, odb); |
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} |
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/** @return the lock protecting this instance's state. */ |
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protected ReentrantLock getLock() { |
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return lock; |
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} |
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/** |
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* @return {@code true} if commit of a new small reftable should try to |
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* replace a prior small reftable by performing a compaction, |
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* instead of extending the stack depth. |
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*/ |
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protected boolean compactDuringCommit() { |
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return true; |
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} |
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/** |
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* Obtain a handle to the merged reader. |
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* |
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* @return (possibly cached) handle to the merged reader. |
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* @throws IOException |
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* if tables cannot be opened. |
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*/ |
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protected Reftable reader() throws IOException { |
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lock.lock(); |
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try { |
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if (mergedTables == null) { |
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mergedTables = new MergedReftable(stack().readers()); |
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} |
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return mergedTables; |
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} finally { |
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lock.unlock(); |
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} |
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} |
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/** |
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* Obtain a handle to the stack of reftables. |
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* |
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* @return (possibly cached) handle to the stack. |
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* @throws IOException |
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* if tables cannot be opened. |
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*/ |
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protected ReftableStack stack() throws IOException { |
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lock.lock(); |
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try { |
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if (tableStack == null) { |
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DfsObjDatabase odb = getRepository().getObjectDatabase(); |
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if (ctx == null) { |
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ctx = odb.newReader(); |
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} |
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tableStack = ReftableStack.open(ctx, |
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Arrays.asList(odb.getReftables())); |
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} |
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return tableStack; |
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} finally { |
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lock.unlock(); |
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} |
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} |
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@Override |
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public boolean isNameConflicting(String refName) throws IOException { |
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lock.lock(); |
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try { |
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Reftable table = reader(); |
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// Cannot be nested within an existing reference.
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int lastSlash = refName.lastIndexOf('/'); |
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while (0 < lastSlash) { |
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if (table.hasRef(refName.substring(0, lastSlash))) { |
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return true; |
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} |
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lastSlash = refName.lastIndexOf('/', lastSlash - 1); |
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} |
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// Cannot be the container of an existing reference.
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return table.hasRef(refName + '/'); |
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} finally { |
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lock.unlock(); |
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} |
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} |
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@Override |
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public Ref exactRef(String name) throws IOException { |
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lock.lock(); |
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try { |
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Reftable table = reader(); |
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Ref ref = table.exactRef(name); |
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if (ref != null && ref.isSymbolic()) { |
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return table.resolve(ref); |
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} |
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return ref; |
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} finally { |
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lock.unlock(); |
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} |
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} |
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@Override |
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public Ref getRef(String needle) throws IOException { |
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for (String prefix : SEARCH_PATH) { |
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Ref ref = exactRef(prefix + needle); |
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if (ref != null) { |
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return ref; |
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} |
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} |
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return null; |
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} |
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@Override |
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public Map<String, Ref> getRefs(String prefix) throws IOException { |
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RefList.Builder<Ref> all = new RefList.Builder<>(); |
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lock.lock(); |
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try { |
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Reftable table = reader(); |
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try (RefCursor rc = ALL.equals(prefix) ? table.allRefs() |
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: table.seekRef(prefix)) { |
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while (rc.next()) { |
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Ref ref = table.resolve(rc.getRef()); |
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if (ref != null) { |
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all.add(ref); |
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} |
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} |
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} |
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} finally { |
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lock.unlock(); |
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} |
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RefList<Ref> none = RefList.emptyList(); |
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return new RefMap(prefix, all.toRefList(), none, none); |
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} |
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@Override |
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public Ref peel(Ref ref) throws IOException { |
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Ref oldLeaf = ref.getLeaf(); |
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if (oldLeaf.isPeeled() || oldLeaf.getObjectId() == null) { |
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return ref; |
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} |
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return recreate(ref, doPeel(oldLeaf)); |
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} |
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@Override |
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boolean exists() throws IOException { |
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DfsObjDatabase odb = getRepository().getObjectDatabase(); |
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return odb.getReftables().length > 0; |
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} |
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@Override |
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void clearCache() { |
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lock.lock(); |
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try { |
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if (tableStack != null) { |
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tableStack.close(); |
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tableStack = null; |
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} |
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if (ctx != null) { |
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ctx.close(); |
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ctx = null; |
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} |
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mergedTables = null; |
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} finally { |
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lock.unlock(); |
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} |
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} |
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@Override |
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protected boolean compareAndPut(Ref oldRef, @Nullable Ref newRef) |
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throws IOException { |
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ReceiveCommand cmd = toCommand(oldRef, newRef); |
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try (RevWalk rw = new RevWalk(getRepository())) { |
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newBatchUpdate().setAllowNonFastForwards(true).addCommand(cmd) |
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.execute(rw, NullProgressMonitor.INSTANCE); |
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} |
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switch (cmd.getResult()) { |
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case OK: |
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return true; |
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case REJECTED_OTHER_REASON: |
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throw new IOException(cmd.getMessage()); |
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case LOCK_FAILURE: |
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default: |
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return false; |
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} |
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} |
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private static ReceiveCommand toCommand(Ref oldRef, Ref newRef) { |
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ObjectId oldId = toId(oldRef); |
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ObjectId newId = toId(newRef); |
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String name = toName(oldRef, newRef); |
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if (oldRef != null && oldRef.isSymbolic()) { |
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if (newRef != null) { |
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if (newRef.isSymbolic()) { |
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return ReceiveCommand.link(oldRef.getTarget().getName(), |
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newRef.getTarget().getName(), name); |
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} else { |
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return ReceiveCommand.unlink(oldRef.getTarget().getName(), |
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newId, name); |
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} |
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} else { |
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return ReceiveCommand.unlink(oldRef.getTarget().getName(), |
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ObjectId.zeroId(), name); |
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} |
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} |
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if (newRef != null && newRef.isSymbolic()) { |
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if (oldRef != null) { |
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if (oldRef.isSymbolic()) { |
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return ReceiveCommand.link(oldRef.getTarget().getName(), |
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newRef.getTarget().getName(), name); |
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} else { |
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return ReceiveCommand.link(oldId, |
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newRef.getTarget().getName(), name); |
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} |
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} else { |
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return ReceiveCommand.link(ObjectId.zeroId(), |
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newRef.getTarget().getName(), name); |
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} |
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} |
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return new ReceiveCommand(oldId, newId, name); |
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} |
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private static ObjectId toId(Ref ref) { |
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if (ref != null) { |
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ObjectId id = ref.getObjectId(); |
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if (id != null) { |
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return id; |
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} |
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} |
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return ObjectId.zeroId(); |
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} |
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private static String toName(Ref oldRef, Ref newRef) { |
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return oldRef != null ? oldRef.getName() : newRef.getName(); |
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} |
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@Override |
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protected boolean compareAndRemove(Ref oldRef) throws IOException { |
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return compareAndPut(oldRef, null); |
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} |
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@Override |
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protected RefCache scanAllRefs() throws IOException { |
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throw new UnsupportedOperationException(); |
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} |
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@Override |
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void stored(Ref ref) { |
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// Unnecessary; ReftableBatchRefUpdate calls clearCache().
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} |
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@Override |
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void removed(String refName) { |
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// Unnecessary; ReftableBatchRefUpdate calls clearCache().
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} |
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@Override |
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protected void cachePeeledState(Ref oldLeaf, Ref newLeaf) { |
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// Do not cache peeled state in reftable.
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} |
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} |
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@ -0,0 +1,460 @@
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/* |
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* Copyright (C) 2017, Google Inc. |
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* 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
|
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* |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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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 |
||||
* copyright notice, this list of conditions and the following |
||||
* disclaimer in the documentation and/or other materials provided |
||||
* with the distribution. |
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* |
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* - 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. |
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* |
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* 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; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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package org.eclipse.jgit.internal.storage.dfs; |
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import static org.eclipse.jgit.internal.storage.pack.PackExt.REFTABLE; |
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import static org.eclipse.jgit.lib.Ref.Storage.NEW; |
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import static org.eclipse.jgit.lib.Ref.Storage.PACKED; |
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import static org.eclipse.jgit.transport.ReceiveCommand.Result.LOCK_FAILURE; |
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import static org.eclipse.jgit.transport.ReceiveCommand.Result.NOT_ATTEMPTED; |
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import static org.eclipse.jgit.transport.ReceiveCommand.Result.OK; |
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import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_MISSING_OBJECT; |
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import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_NONFASTFORWARD; |
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import static org.eclipse.jgit.transport.ReceiveCommand.Type.UPDATE_NONFASTFORWARD; |
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import java.io.ByteArrayOutputStream; |
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import java.io.IOException; |
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import java.io.OutputStream; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Set; |
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import java.util.concurrent.locks.ReentrantLock; |
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import org.eclipse.jgit.annotations.Nullable; |
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import org.eclipse.jgit.errors.MissingObjectException; |
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import org.eclipse.jgit.internal.storage.dfs.DfsObjDatabase.PackSource; |
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import org.eclipse.jgit.internal.storage.io.BlockSource; |
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import org.eclipse.jgit.internal.storage.pack.PackExt; |
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import org.eclipse.jgit.internal.storage.reftable.RefCursor; |
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import org.eclipse.jgit.internal.storage.reftable.Reftable; |
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import org.eclipse.jgit.internal.storage.reftable.ReftableCompactor; |
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import org.eclipse.jgit.internal.storage.reftable.ReftableConfig; |
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import org.eclipse.jgit.internal.storage.reftable.ReftableReader; |
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import org.eclipse.jgit.internal.storage.reftable.ReftableWriter; |
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import org.eclipse.jgit.lib.AnyObjectId; |
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import org.eclipse.jgit.lib.BatchRefUpdate; |
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import org.eclipse.jgit.lib.ObjectId; |
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import org.eclipse.jgit.lib.ObjectIdRef; |
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import org.eclipse.jgit.lib.PersonIdent; |
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import org.eclipse.jgit.lib.ProgressMonitor; |
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import org.eclipse.jgit.lib.Ref; |
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import org.eclipse.jgit.lib.ReflogEntry; |
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import org.eclipse.jgit.lib.SymbolicRef; |
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import org.eclipse.jgit.revwalk.RevObject; |
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import org.eclipse.jgit.revwalk.RevTag; |
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import org.eclipse.jgit.revwalk.RevWalk; |
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import org.eclipse.jgit.transport.ReceiveCommand; |
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/** {@link BatchRefUpdate} for {@link DfsReftableDatabase}. */ |
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public class ReftableBatchRefUpdate extends BatchRefUpdate { |
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private static final int AVG_BYTES = 36; |
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private final DfsReftableDatabase refdb; |
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private final DfsObjDatabase odb; |
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private final ReentrantLock lock; |
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private final ReftableConfig reftableConfig; |
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/** |
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* Initialize batch update. |
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* |
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* @param refdb |
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* database the update will modify. |
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* @param odb |
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* object database to store the reftable. |
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*/ |
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protected ReftableBatchRefUpdate(DfsReftableDatabase refdb, |
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DfsObjDatabase odb) { |
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super(refdb); |
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this.refdb = refdb; |
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this.odb = odb; |
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lock = refdb.getLock(); |
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reftableConfig = new ReftableConfig(refdb.getRepository().getConfig()); |
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} |
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@Override |
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public void execute(RevWalk rw, ProgressMonitor pm, List<String> options) { |
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List<ReceiveCommand> pending = getPending(); |
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if (pending.isEmpty()) { |
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return; |
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} |
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if (options != null) { |
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setPushOptions(options); |
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} |
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try { |
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if (!checkObjectExistence(rw, pending)) { |
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return; |
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} |
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if (!checkNonFastForwards(rw, pending)) { |
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return; |
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} |
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|
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lock.lock(); |
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try { |
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Reftable table = refdb.reader(); |
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if (!checkExpected(table, pending)) { |
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return; |
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} |
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if (!checkConflicting(pending)) { |
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return; |
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} |
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if (!blockUntilTimestamps(MAX_WAIT)) { |
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return; |
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} |
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applyUpdates(rw, pending); |
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for (ReceiveCommand cmd : pending) { |
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cmd.setResult(OK); |
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} |
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} finally { |
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lock.unlock(); |
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} |
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} catch (IOException e) { |
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pending.get(0).setResult(LOCK_FAILURE, "io error"); //$NON-NLS-1$
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ReceiveCommand.abort(pending); |
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} |
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} |
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private List<ReceiveCommand> getPending() { |
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return ReceiveCommand.filter(getCommands(), NOT_ATTEMPTED); |
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} |
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|
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private boolean checkObjectExistence(RevWalk rw, |
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List<ReceiveCommand> pending) throws IOException { |
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for (ReceiveCommand cmd : pending) { |
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try { |
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if (!cmd.getNewId().equals(ObjectId.zeroId())) { |
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rw.parseAny(cmd.getNewId()); |
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} |
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} catch (MissingObjectException e) { |
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// ReceiveCommand#setResult(Result) converts REJECTED to
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// REJECTED_NONFASTFORWARD, even though that result is also
|
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// used for a missing object. Eagerly handle this case so we
|
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// can set the right result.
|
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cmd.setResult(REJECTED_MISSING_OBJECT); |
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ReceiveCommand.abort(pending); |
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return false; |
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} |
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} |
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return true; |
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} |
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|
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private boolean checkNonFastForwards(RevWalk rw, |
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List<ReceiveCommand> pending) throws IOException { |
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if (isAllowNonFastForwards()) { |
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return true; |
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} |
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for (ReceiveCommand cmd : pending) { |
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cmd.updateType(rw); |
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if (cmd.getType() == UPDATE_NONFASTFORWARD) { |
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cmd.setResult(REJECTED_NONFASTFORWARD); |
||||
ReceiveCommand.abort(pending); |
||||
return false; |
||||
} |
||||
} |
||||
return true; |
||||
} |
||||
|
||||
private boolean checkConflicting(List<ReceiveCommand> pending) |
||||
throws IOException { |
||||
Set<String> names = new HashSet<>(); |
||||
for (ReceiveCommand cmd : pending) { |
||||
names.add(cmd.getRefName()); |
||||
} |
||||
|
||||
boolean ok = true; |
||||
for (ReceiveCommand cmd : pending) { |
||||
String name = cmd.getRefName(); |
||||
if (refdb.isNameConflicting(name)) { |
||||
cmd.setResult(LOCK_FAILURE); |
||||
ok = false; |
||||
} else { |
||||
int s = name.lastIndexOf('/'); |
||||
while (0 < s) { |
||||
if (names.contains(name.substring(0, s))) { |
||||
cmd.setResult(LOCK_FAILURE); |
||||
ok = false; |
||||
break; |
||||
} |
||||
s = name.lastIndexOf('/', s - 1); |
||||
} |
||||
} |
||||
} |
||||
if (!ok && isAtomic()) { |
||||
ReceiveCommand.abort(pending); |
||||
return false; |
||||
} |
||||
return ok; |
||||
} |
||||
|
||||
private boolean checkExpected(Reftable table, List<ReceiveCommand> pending) |
||||
throws IOException { |
||||
for (ReceiveCommand cmd : pending) { |
||||
Ref ref; |
||||
try (RefCursor rc = table.seekRef(cmd.getRefName())) { |
||||
ref = rc.next() ? rc.getRef() : null; |
||||
} |
||||
if (!matchOld(cmd, ref)) { |
||||
cmd.setResult(LOCK_FAILURE); |
||||
if (isAtomic()) { |
||||
ReceiveCommand.abort(pending); |
||||
return false; |
||||
} |
||||
} |
||||
} |
||||
return true; |
||||
} |
||||
|
||||
private static boolean matchOld(ReceiveCommand cmd, @Nullable Ref ref) { |
||||
if (ref == null) { |
||||
return AnyObjectId.equals(ObjectId.zeroId(), cmd.getOldId()) |
||||
&& cmd.getOldSymref() == null; |
||||
} else if (ref.isSymbolic()) { |
||||
return ref.getTarget().getName().equals(cmd.getOldSymref()); |
||||
} |
||||
ObjectId id = ref.getObjectId(); |
||||
if (id == null) { |
||||
id = ObjectId.zeroId(); |
||||
} |
||||
return cmd.getOldId().equals(id); |
||||
} |
||||
|
||||
private void applyUpdates(RevWalk rw, List<ReceiveCommand> pending) |
||||
throws IOException { |
||||
List<Ref> newRefs = toNewRefs(rw, pending); |
||||
long updateIndex = nextUpdateIndex(); |
||||
Set<DfsPackDescription> prune = Collections.emptySet(); |
||||
DfsPackDescription pack = odb.newPack(PackSource.INSERT); |
||||
try (DfsOutputStream out = odb.writeFile(pack, REFTABLE)) { |
||||
ReftableConfig cfg = DfsPackCompactor |
||||
.configureReftable(reftableConfig, out); |
||||
|
||||
ReftableWriter.Stats stats; |
||||
if (refdb.compactDuringCommit() |
||||
&& newRefs.size() * AVG_BYTES <= cfg.getRefBlockSize() |
||||
&& canCompactTopOfStack(cfg)) { |
||||
ByteArrayOutputStream tmp = new ByteArrayOutputStream(); |
||||
write(tmp, cfg, updateIndex, newRefs, pending); |
||||
stats = compactTopOfStack(out, cfg, tmp.toByteArray()); |
||||
prune = toPruneTopOfStack(); |
||||
} else { |
||||
stats = write(out, cfg, updateIndex, newRefs, pending); |
||||
} |
||||
pack.addFileExt(REFTABLE); |
||||
pack.setReftableStats(stats); |
||||
} |
||||
|
||||
odb.commitPack(Collections.singleton(pack), prune); |
||||
odb.addReftable(pack, prune); |
||||
refdb.clearCache(); |
||||
} |
||||
|
||||
private ReftableWriter.Stats write(OutputStream os, ReftableConfig cfg, |
||||
long updateIndex, List<Ref> newRefs, List<ReceiveCommand> pending) |
||||
throws IOException { |
||||
ReftableWriter writer = new ReftableWriter(cfg) |
||||
.setMinUpdateIndex(updateIndex).setMaxUpdateIndex(updateIndex) |
||||
.begin(os).sortAndWriteRefs(newRefs); |
||||
if (!isRefLogDisabled()) { |
||||
writeLog(writer, updateIndex, pending); |
||||
} |
||||
writer.finish(); |
||||
return writer.getStats(); |
||||
} |
||||
|
||||
private void writeLog(ReftableWriter writer, long updateIndex, |
||||
List<ReceiveCommand> pending) throws IOException { |
||||
Map<String, ReceiveCommand> cmds = new HashMap<>(); |
||||
List<String> byName = new ArrayList<>(pending.size()); |
||||
for (ReceiveCommand cmd : pending) { |
||||
cmds.put(cmd.getRefName(), cmd); |
||||
byName.add(cmd.getRefName()); |
||||
} |
||||
Collections.sort(byName); |
||||
|
||||
PersonIdent ident = getRefLogIdent(); |
||||
if (ident == null) { |
||||
ident = new PersonIdent(refdb.getRepository()); |
||||
} |
||||
for (String name : byName) { |
||||
ReceiveCommand cmd = cmds.get(name); |
||||
if (isRefLogDisabled(cmd)) { |
||||
continue; |
||||
} |
||||
String msg = getRefLogMessage(cmd); |
||||
if (isRefLogIncludingResult(cmd)) { |
||||
String strResult = toResultString(cmd); |
||||
if (strResult != null) { |
||||
msg = msg.isEmpty() ? strResult : msg + ": " + strResult; //$NON-NLS-1$
|
||||
} |
||||
} |
||||
writer.writeLog(name, updateIndex, ident, cmd.getOldId(), |
||||
cmd.getNewId(), msg); |
||||
} |
||||
} |
||||
|
||||
private String toResultString(ReceiveCommand cmd) { |
||||
switch (cmd.getType()) { |
||||
case CREATE: |
||||
return ReflogEntry.PREFIX_CREATED; |
||||
case UPDATE: |
||||
// Match the behavior of a single RefUpdate. In that case, setting
|
||||
// the force bit completely bypasses the potentially expensive
|
||||
// isMergedInto check, by design, so the reflog message may be
|
||||
// inaccurate.
|
||||
//
|
||||
// Similarly, this class bypasses the isMergedInto checks when the
|
||||
// force bit is set, meaning we can't actually distinguish between
|
||||
// UPDATE and UPDATE_NONFASTFORWARD when isAllowNonFastForwards()
|
||||
// returns true.
|
||||
return isAllowNonFastForwards() ? ReflogEntry.PREFIX_FORCED_UPDATE |
||||
: ReflogEntry.PREFIX_FAST_FORWARD; |
||||
case UPDATE_NONFASTFORWARD: |
||||
return ReflogEntry.PREFIX_FORCED_UPDATE; |
||||
default: |
||||
return null; |
||||
} |
||||
} |
||||
|
||||
private static List<Ref> toNewRefs(RevWalk rw, List<ReceiveCommand> pending) |
||||
throws IOException { |
||||
List<Ref> refs = new ArrayList<>(pending.size()); |
||||
for (ReceiveCommand cmd : pending) { |
||||
String name = cmd.getRefName(); |
||||
ObjectId newId = cmd.getNewId(); |
||||
String newSymref = cmd.getNewSymref(); |
||||
if (AnyObjectId.equals(ObjectId.zeroId(), newId) |
||||
&& newSymref == null) { |
||||
refs.add(new ObjectIdRef.Unpeeled(NEW, name, null)); |
||||
continue; |
||||
} else if (newSymref != null) { |
||||
refs.add(new SymbolicRef(name, |
||||
new ObjectIdRef.Unpeeled(NEW, newSymref, null))); |
||||
continue; |
||||
} |
||||
|
||||
RevObject obj = rw.parseAny(newId); |
||||
RevObject peel = null; |
||||
if (obj instanceof RevTag) { |
||||
peel = rw.peel(obj); |
||||
} |
||||
if (peel != null) { |
||||
refs.add(new ObjectIdRef.PeeledTag(PACKED, name, newId, |
||||
peel.copy())); |
||||
} else { |
||||
refs.add(new ObjectIdRef.PeeledNonTag(PACKED, name, newId)); |
||||
} |
||||
} |
||||
return refs; |
||||
} |
||||
|
||||
private long nextUpdateIndex() throws IOException { |
||||
long updateIndex = 0; |
||||
for (Reftable r : refdb.stack().readers()) { |
||||
if (r instanceof ReftableReader) { |
||||
updateIndex = Math.max(updateIndex, |
||||
((ReftableReader) r).maxUpdateIndex()); |
||||
} |
||||
} |
||||
return updateIndex + 1; |
||||
} |
||||
|
||||
private boolean canCompactTopOfStack(ReftableConfig cfg) |
||||
throws IOException { |
||||
ReftableStack stack = refdb.stack(); |
||||
List<Reftable> readers = stack.readers(); |
||||
if (readers.isEmpty()) { |
||||
return false; |
||||
} |
||||
|
||||
int lastIdx = readers.size() - 1; |
||||
DfsReftable last = stack.files().get(lastIdx); |
||||
DfsPackDescription desc = last.getPackDescription(); |
||||
if (desc.getPackSource() != PackSource.INSERT |
||||
|| !packOnlyContainsReftable(desc)) { |
||||
return false; |
||||
} |
||||
|
||||
Reftable table = readers.get(lastIdx); |
||||
int bs = cfg.getRefBlockSize(); |
||||
return table instanceof ReftableReader |
||||
&& ((ReftableReader) table).size() <= 3 * bs; |
||||
} |
||||
|
||||
private ReftableWriter.Stats compactTopOfStack(OutputStream out, |
||||
ReftableConfig cfg, byte[] newTable) throws IOException { |
||||
List<Reftable> stack = refdb.stack().readers(); |
||||
Reftable last = stack.get(stack.size() - 1); |
||||
|
||||
List<Reftable> tables = new ArrayList<>(2); |
||||
tables.add(last); |
||||
tables.add(new ReftableReader(BlockSource.from(newTable))); |
||||
|
||||
ReftableCompactor compactor = new ReftableCompactor(); |
||||
compactor.setConfig(cfg); |
||||
compactor.addAll(tables); |
||||
compactor.compact(out); |
||||
return compactor.getStats(); |
||||
} |
||||
|
||||
private Set<DfsPackDescription> toPruneTopOfStack() throws IOException { |
||||
List<DfsReftable> stack = refdb.stack().files(); |
||||
DfsReftable last = stack.get(stack.size() - 1); |
||||
return Collections.singleton(last.getPackDescription()); |
||||
} |
||||
|
||||
private boolean packOnlyContainsReftable(DfsPackDescription desc) { |
||||
for (PackExt ext : PackExt.values()) { |
||||
if (ext != REFTABLE && desc.hasFileExt(ext)) { |
||||
return false; |
||||
} |
||||
} |
||||
return true; |
||||
} |
||||
} |
||||
Loading…
Reference in new issue