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Output of selected reuses is refactored to use a new ObjectReuseAsIs interface that extends the ObjectReader. This interface allows the reader to control how it performs the reuse into the output stream, but also allows it to throw an exception to request the writer to find a different candidate representation. The PackFile reuse code was overhauled, cleaning up the APIs so they aren't exposed in the object loader, but instead are now a single method on the PackFile itself. The reuse algorithm was changed to do a data verification pass, followed by the copy pass to the output. This permits us to work around a corrupt object in a pack file by seeking another copy of that object when this one is bad. The reuse code was also optimized for the common case, where the in-pack representation is under 16 KiB. In these smaller cases data is sent to the pack writer more directly, avoiding some copying. Change-Id: I6350c2b444118305e8446ce1dfd049259832bcca Signed-off-by: Shawn O. Pearce <spearce@spearce.org>stable-0.9
Shawn O. Pearce
15 years ago
12 changed files with 512 additions and 294 deletions
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/* |
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* Copyright (C) 2010, 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.errors; |
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import org.eclipse.jgit.lib.ObjectToPack; |
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/** A previously selected representation is no longer available. */ |
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public class StoredObjectRepresentationNotAvailableException extends Exception { |
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private static final long serialVersionUID = 1L; |
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/** |
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* Construct an error for an object. |
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* |
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* @param otp |
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* the object whose current representation is no longer present. |
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*/ |
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public StoredObjectRepresentationNotAvailableException(ObjectToPack otp) { |
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// Do nothing.
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} |
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} |
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