Browse Source
* changes: PackBitmapIndex: Set distance threshold PackBitmapIndex: Not buffer inflated bitmap in BasePackBitmapIndex PackBitmapIndex: Remove convertedBitmaps in the Remapper PackBitmapIndex: Reduce memory usage in GC PackBitmapIndex: Add AddToBitmapWithCacheFilter class PackBitmapIndex: Add util methods and builder to BitmapCommit PackBitmapIndex: Move BitmapCommit to a top-level class Refactor: Make retriveCompressed an method of the Bitmap classmaster
Terry Parker
5 years ago
committed by
Gerrit Code Review @ Eclipse.org
11 changed files with 408 additions and 116 deletions
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/* |
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* Copyright (c) 2020, Google LLC and others |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the Eclipse Distribution License v. 1.0 which is available at |
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* http://www.eclipse.org/org/documents/edl-v10.php.
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* |
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* SPDX-License-Identifier: BSD-3-Clause |
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*/ |
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package org.eclipse.jgit.internal.revwalk; |
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import org.eclipse.jgit.lib.BitmapIndex.Bitmap; |
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import org.eclipse.jgit.lib.BitmapIndex.BitmapBuilder; |
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import org.eclipse.jgit.lib.Constants; |
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import org.eclipse.jgit.lib.AnyObjectId; |
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import org.eclipse.jgit.revwalk.filter.RevFilter; |
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import org.eclipse.jgit.revwalk.RevWalk; |
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import org.eclipse.jgit.revwalk.RevCommit; |
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import org.eclipse.jgit.revwalk.RevFlag; |
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/** |
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* A RevFilter that adds the visited commits to {@code bitmap} as a side effect. |
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* <p> |
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* When the walk hits a commit that is the same as {@code cachedCommit} or is |
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* part of {@code bitmap}'s BitmapIndex, that entire bitmap is ORed into |
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* {@code bitmap} and the commit and its parents are marked as SEEN so that the |
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* walk does not have to visit its ancestors. This ensures the walk is very |
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* short if there is good bitmap coverage. |
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*/ |
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public class AddToBitmapWithCacheFilter extends RevFilter { |
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private final AnyObjectId cachedCommit; |
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private final Bitmap cachedBitmap; |
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private final BitmapBuilder bitmap; |
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/** |
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* Create a filter with a cached BitmapCommit that adds visited commits to |
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* the given bitmap. |
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* |
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* @param cachedCommit |
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* the cached commit |
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* @param cachedBitmap |
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* the bitmap corresponds to {@code cachedCommit}} |
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* @param bitmap |
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* bitmap to write visited commits to |
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*/ |
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public AddToBitmapWithCacheFilter(AnyObjectId cachedCommit, |
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Bitmap cachedBitmap, |
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BitmapBuilder bitmap) { |
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this.cachedCommit = cachedCommit; |
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this.cachedBitmap = cachedBitmap; |
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this.bitmap = bitmap; |
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} |
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/** {@inheritDoc} */ |
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@Override |
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public final boolean include(RevWalk rw, RevCommit c) { |
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Bitmap visitedBitmap; |
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if (bitmap.contains(c)) { |
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// already included
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} else if ((visitedBitmap = bitmap.getBitmapIndex() |
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.getBitmap(c)) != null) { |
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bitmap.or(visitedBitmap); |
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} else if (cachedCommit.equals(c)) { |
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bitmap.or(cachedBitmap); |
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} else { |
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bitmap.addObject(c, Constants.OBJ_COMMIT); |
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return true; |
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} |
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for (RevCommit p : c.getParents()) { |
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p.add(RevFlag.SEEN); |
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} |
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return false; |
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} |
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/** {@inheritDoc} */ |
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@Override |
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public final RevFilter clone() { |
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throw new UnsupportedOperationException(); |
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} |
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/** {@inheritDoc} */ |
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@Override |
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public final boolean requiresCommitBody() { |
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return false; |
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} |
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} |
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/* |
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* Copyright (c) 2020, Google LLC and others |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the Eclipse Distribution License v. 1.0 which is available at |
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* http://www.eclipse.org/org/documents/edl-v10.php.
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* |
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* SPDX-License-Identifier: BSD-3-Clause |
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*/ |
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package org.eclipse.jgit.internal.storage.pack; |
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import org.eclipse.jgit.lib.AnyObjectId; |
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import org.eclipse.jgit.lib.ObjectId; |
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/** |
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* A commit object for which a bitmap index should be built. |
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*/ |
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public final class BitmapCommit extends ObjectId { |
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private final boolean reuseWalker; |
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private final int flags; |
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private final boolean addToIndex; |
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BitmapCommit(AnyObjectId objectId, boolean reuseWalker, int flags) { |
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super(objectId); |
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this.reuseWalker = reuseWalker; |
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this.flags = flags; |
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this.addToIndex = false; |
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} |
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BitmapCommit(AnyObjectId objectId, boolean reuseWalker, int flags, |
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boolean addToIndex) { |
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super(objectId); |
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this.reuseWalker = reuseWalker; |
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this.flags = flags; |
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this.addToIndex = addToIndex; |
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} |
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boolean isReuseWalker() { |
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return reuseWalker; |
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} |
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int getFlags() { |
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return flags; |
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} |
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/** |
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* Whether corresponding bitmap should be added to PackBitmapIndexBuilder. |
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* |
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* @return true if the corresponding bitmap should be added to |
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* PackBitmapIndexBuilder. |
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*/ |
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public boolean isAddToIndex() { |
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return addToIndex; |
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} |
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/** |
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* Get a builder of BitmapCommit whose object id is {@code objId}. |
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* |
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* @param objId |
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* the object id of the BitmapCommit |
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* @return a BitmapCommit builder with object id set. |
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*/ |
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public static Builder newBuilder(AnyObjectId objId) { |
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return new Builder().setId(objId); |
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} |
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/** |
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* Get a builder of BitmapCommit whose fields are copied from |
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* {@code commit}. |
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* |
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* @param commit |
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* the bitmap commit the builder is copying from |
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* @return a BitmapCommit build with fields copied from an existing bitmap |
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* commit. |
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*/ |
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public static Builder copyFrom(BitmapCommit commit) { |
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return new Builder().setId(commit) |
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.setReuseWalker(commit.isReuseWalker()) |
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.setFlags(commit.getFlags()) |
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.setAddToIndex(commit.isAddToIndex()); |
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} |
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/** |
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* Builder of BitmapCommit. |
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*/ |
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public static class Builder { |
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private AnyObjectId objectId; |
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private boolean reuseWalker; |
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private int flags; |
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private boolean addToIndex; |
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// Prevent default constructor.
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private Builder() { |
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} |
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/** |
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* Set objectId of the builder. |
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* |
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* @param objectId |
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* the object id of the BitmapCommit |
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* @return the builder itself |
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*/ |
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public Builder setId(AnyObjectId objectId) { |
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this.objectId = objectId; |
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return this; |
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} |
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/** |
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* Set reuseWalker of the builder. |
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* |
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* @param reuseWalker |
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* whether the BitmapCommit should reuse bitmap walker when |
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* walking objects |
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* @return the builder itself |
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*/ |
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public Builder setReuseWalker(boolean reuseWalker) { |
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this.reuseWalker = reuseWalker; |
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return this; |
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} |
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/** |
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* Set flags of the builder. |
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* |
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* @param flags |
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* the flags of the BitmapCommit |
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* @return the builder itself |
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*/ |
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public Builder setFlags(int flags) { |
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this.flags = flags; |
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return this; |
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} |
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/** |
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* Set whether whether the bitmap of the BitmapCommit should be added to |
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* PackBitmapIndexBuilder when building bitmap index file. |
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* |
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* @param addToIndex |
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* whether the bitmap of the BitmapCommit should be added to |
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* PackBitmapIndexBuilder when building bitmap index file |
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* @return the builder itself |
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*/ |
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public Builder setAddToIndex(boolean addToIndex) { |
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this.addToIndex = addToIndex; |
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return this; |
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} |
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/** |
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* Builds BitmapCommit from the builder. |
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* |
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* @return the new BitmapCommit. |
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*/ |
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public BitmapCommit build() { |
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return new BitmapCommit(objectId, reuseWalker, flags, |
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addToIndex); |
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} |
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} |
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} |
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