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- /*
- * Copyright (C) 2008-2010, Google Inc.
- * Copyright (C) 2008, Marek Zawirski <marek.zawirski@gmail.com> and others
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Distribution License v. 1.0 which is available at
- * https://www.eclipse.org/org/documents/edl-v10.php.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
- package org.eclipse.jgit.storage.pack;
-
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_CORE_SECTION;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_BIGFILE_THRESHOLD;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_BITMAP_CONTIGUOUS_COMMIT_COUNT;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_BITMAP_DISTANT_COMMIT_SPAN;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_BITMAP_EXCESSIVE_BRANCH_COUNT;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_BITMAP_INACTIVE_BRANCH_AGE_INDAYS;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_BITMAP_RECENT_COMMIT_COUNT;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_BUILD_BITMAPS;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_COMPRESSION;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_CUT_DELTACHAINS;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_DELTA_CACHE_LIMIT;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_DELTA_CACHE_SIZE;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_DELTA_COMPRESSION;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_DEPTH;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_INDEXVERSION;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_MIN_SIZE_PREVENT_RACYPACK;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_REUSE_DELTAS;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_REUSE_OBJECTS;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_SEARCH_FOR_REUSE_TIMEOUT;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_SINGLE_PACK;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_THREADS;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_WAIT_PREVENT_RACYPACK;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_WINDOW;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_KEY_WINDOW_MEMORY;
- import static org.eclipse.jgit.lib.ConfigConstants.CONFIG_PACK_SECTION;
-
- import java.time.Duration;
- import java.util.concurrent.Executor;
- import java.util.concurrent.TimeUnit;
- import java.util.zip.Deflater;
-
- import org.eclipse.jgit.internal.storage.file.PackIndexWriter;
- import org.eclipse.jgit.lib.Config;
- import org.eclipse.jgit.lib.Repository;
-
- /**
- * Configuration used by a pack writer when constructing the stream.
- *
- * A configuration may be modified once created, but should not be modified
- * while it is being used by a PackWriter. If a configuration is not modified it
- * is safe to share the same configuration instance between multiple concurrent
- * threads executing different PackWriters.
- */
- public class PackConfig {
- /**
- * Default value of deltas reuse option: {@value}
- *
- * @see #setReuseDeltas(boolean)
- */
- public static final boolean DEFAULT_REUSE_DELTAS = true;
-
- /**
- * Default value of objects reuse option: {@value}
- *
- * @see #setReuseObjects(boolean)
- */
- public static final boolean DEFAULT_REUSE_OBJECTS = true;
-
- /**
- * Default value of keep old packs option: {@value}
- * @see #setPreserveOldPacks(boolean)
- * @since 4.7
- */
- public static final boolean DEFAULT_PRESERVE_OLD_PACKS = false;
-
- /**
- * Default value of prune old packs option: {@value}
- * @see #setPrunePreserved(boolean)
- * @since 4.7
- */
- public static final boolean DEFAULT_PRUNE_PRESERVED = false;
-
- /**
- * Default value of delta compress option: {@value}
- *
- * @see #setDeltaCompress(boolean)
- */
- public static final boolean DEFAULT_DELTA_COMPRESS = true;
-
- /**
- * Default value of delta base as offset option: {@value}
- *
- * @see #setDeltaBaseAsOffset(boolean)
- */
- public static final boolean DEFAULT_DELTA_BASE_AS_OFFSET = false;
-
- /**
- * Default value of maximum delta chain depth: {@value}
- *
- * @see #setMaxDeltaDepth(int)
- */
- public static final int DEFAULT_MAX_DELTA_DEPTH = 50;
-
- /**
- * Default window size during packing: {@value}
- *
- * @see #setDeltaSearchWindowSize(int)
- */
- public static final int DEFAULT_DELTA_SEARCH_WINDOW_SIZE = 10;
-
- private static final int MB = 1 << 20;
-
- /**
- * Default big file threshold: {@value}
- *
- * @see #setBigFileThreshold(int)
- */
- public static final int DEFAULT_BIG_FILE_THRESHOLD = 50 * MB;
-
- /**
- * Default if we wait before opening a newly written pack to prevent its
- * lastModified timestamp could be racy
- *
- * @since 5.1.8
- */
- public static final boolean DEFAULT_WAIT_PREVENT_RACY_PACK = false;
-
- /**
- * Default if we wait before opening a newly written pack to prevent its
- * lastModified timestamp could be racy
- *
- * @since 5.1.8
- */
- public static final long DEFAULT_MINSIZE_PREVENT_RACY_PACK = 100 * MB;
-
- /**
- * Default delta cache size: {@value}
- *
- * @see #setDeltaCacheSize(long)
- */
- public static final long DEFAULT_DELTA_CACHE_SIZE = 50 * 1024 * 1024;
-
- /**
- * Default delta cache limit: {@value}
- *
- * @see #setDeltaCacheLimit(int)
- */
- public static final int DEFAULT_DELTA_CACHE_LIMIT = 100;
-
- /**
- * Default index version: {@value}
- *
- * @see #setIndexVersion(int)
- */
- public static final int DEFAULT_INDEX_VERSION = 2;
-
- /**
- * Default value of the build bitmaps option: {@value}
- *
- * @see #setBuildBitmaps(boolean)
- * @since 3.0
- */
- public static final boolean DEFAULT_BUILD_BITMAPS = true;
-
- /**
- * Default count of most recent commits to select for bitmaps. Only applies
- * when bitmaps are enabled: {@value}
- *
- * @see #setBitmapContiguousCommitCount(int)
- * @since 4.2
- */
- public static final int DEFAULT_BITMAP_CONTIGUOUS_COMMIT_COUNT = 100;
-
- /**
- * Count at which the span between selected commits changes from
- * "bitmapRecentCommitSpan" to "bitmapDistantCommitSpan". Only applies when
- * bitmaps are enabled: {@value}
- *
- * @see #setBitmapRecentCommitCount(int)
- * @since 4.2
- */
- public static final int DEFAULT_BITMAP_RECENT_COMMIT_COUNT = 20000;
-
- /**
- * Default spacing between commits in recent history when selecting commits
- * for bitmaps. Only applies when bitmaps are enabled: {@value}
- *
- * @see #setBitmapRecentCommitSpan(int)
- * @since 4.2
- */
- public static final int DEFAULT_BITMAP_RECENT_COMMIT_SPAN = 100;
-
- /**
- * Default spacing between commits in distant history when selecting commits
- * for bitmaps. Only applies when bitmaps are enabled: {@value}
- *
- * @see #setBitmapDistantCommitSpan(int)
- * @since 4.2
- */
- public static final int DEFAULT_BITMAP_DISTANT_COMMIT_SPAN = 5000;
-
- /**
- * Default count of branches required to activate inactive branch commit
- * selection. If the number of branches is less than this then bitmaps for
- * the entire commit history of all branches will be created, otherwise
- * branches marked as "inactive" will have coverage for only partial
- * history: {@value}
- *
- * @see #setBitmapExcessiveBranchCount(int)
- * @since 4.2
- */
- public static final int DEFAULT_BITMAP_EXCESSIVE_BRANCH_COUNT = 100;
-
- /**
- * Default age at which a branch is considered inactive. Age is taken as the
- * number of days ago that the most recent commit was made to a branch. Only
- * affects bitmap processing if bitmaps are enabled and the
- * "excessive branch count" has been exceeded: {@value}
- *
- * @see #setBitmapInactiveBranchAgeInDays(int)
- * @since 4.2
- */
- public static final int DEFAULT_BITMAP_INACTIVE_BRANCH_AGE_IN_DAYS = 90;
-
- /**
- * Default max time to spend during the search for reuse phase. This
- * optimization is disabled by default: {@value}
- *
- * @see #setSearchForReuseTimeout(Duration)
- * @since 5.13
- */
- public static final Duration DEFAULT_SEARCH_FOR_REUSE_TIMEOUT = Duration
- .ofSeconds(Integer.MAX_VALUE);
-
- private int compressionLevel = Deflater.DEFAULT_COMPRESSION;
-
- private boolean reuseDeltas = DEFAULT_REUSE_DELTAS;
-
- private boolean reuseObjects = DEFAULT_REUSE_OBJECTS;
-
- private boolean preserveOldPacks = DEFAULT_PRESERVE_OLD_PACKS;
-
- private boolean prunePreserved = DEFAULT_PRUNE_PRESERVED;
-
- private boolean deltaBaseAsOffset = DEFAULT_DELTA_BASE_AS_OFFSET;
-
- private boolean deltaCompress = DEFAULT_DELTA_COMPRESS;
-
- private int maxDeltaDepth = DEFAULT_MAX_DELTA_DEPTH;
-
- private int deltaSearchWindowSize = DEFAULT_DELTA_SEARCH_WINDOW_SIZE;
-
- private long deltaSearchMemoryLimit;
-
- private long deltaCacheSize = DEFAULT_DELTA_CACHE_SIZE;
-
- private int deltaCacheLimit = DEFAULT_DELTA_CACHE_LIMIT;
-
- private int bigFileThreshold = DEFAULT_BIG_FILE_THRESHOLD;
-
- private boolean waitPreventRacyPack = DEFAULT_WAIT_PREVENT_RACY_PACK;
-
- private long minSizePreventRacyPack = DEFAULT_MINSIZE_PREVENT_RACY_PACK;
-
- private int threads;
-
- private Executor executor;
-
- private int indexVersion = DEFAULT_INDEX_VERSION;
-
- private boolean buildBitmaps = DEFAULT_BUILD_BITMAPS;
-
- private int bitmapContiguousCommitCount = DEFAULT_BITMAP_CONTIGUOUS_COMMIT_COUNT;
-
- private int bitmapRecentCommitCount = DEFAULT_BITMAP_RECENT_COMMIT_COUNT;
-
- private int bitmapRecentCommitSpan = DEFAULT_BITMAP_RECENT_COMMIT_SPAN;
-
- private int bitmapDistantCommitSpan = DEFAULT_BITMAP_DISTANT_COMMIT_SPAN;
-
- private int bitmapExcessiveBranchCount = DEFAULT_BITMAP_EXCESSIVE_BRANCH_COUNT;
-
- private int bitmapInactiveBranchAgeInDays = DEFAULT_BITMAP_INACTIVE_BRANCH_AGE_IN_DAYS;
-
- private Duration searchForReuseTimeout = DEFAULT_SEARCH_FOR_REUSE_TIMEOUT;
-
- private boolean cutDeltaChains;
-
- private boolean singlePack;
-
- /**
- * Create a default configuration.
- */
- public PackConfig() {
- // Fields are initialized to defaults.
- }
-
- /**
- * Create a configuration honoring the repository's settings.
- *
- * @param db
- * the repository to read settings from. The repository is not
- * retained by the new configuration, instead its settings are
- * copied during the constructor.
- */
- public PackConfig(Repository db) {
- fromConfig(db.getConfig());
- }
-
- /**
- * Create a configuration honoring settings in a
- * {@link org.eclipse.jgit.lib.Config}.
- *
- * @param cfg
- * the source to read settings from. The source is not retained
- * by the new configuration, instead its settings are copied
- * during the constructor.
- */
- public PackConfig(Config cfg) {
- fromConfig(cfg);
- }
-
- /**
- * Copy an existing configuration to a new instance.
- *
- * @param cfg
- * the source configuration to copy from.
- */
- public PackConfig(PackConfig cfg) {
- this.compressionLevel = cfg.compressionLevel;
- this.reuseDeltas = cfg.reuseDeltas;
- this.reuseObjects = cfg.reuseObjects;
- this.preserveOldPacks = cfg.preserveOldPacks;
- this.prunePreserved = cfg.prunePreserved;
- this.deltaBaseAsOffset = cfg.deltaBaseAsOffset;
- this.deltaCompress = cfg.deltaCompress;
- this.maxDeltaDepth = cfg.maxDeltaDepth;
- this.deltaSearchWindowSize = cfg.deltaSearchWindowSize;
- this.deltaSearchMemoryLimit = cfg.deltaSearchMemoryLimit;
- this.deltaCacheSize = cfg.deltaCacheSize;
- this.deltaCacheLimit = cfg.deltaCacheLimit;
- this.bigFileThreshold = cfg.bigFileThreshold;
- this.waitPreventRacyPack = cfg.waitPreventRacyPack;
- this.minSizePreventRacyPack = cfg.minSizePreventRacyPack;
- this.threads = cfg.threads;
- this.executor = cfg.executor;
- this.indexVersion = cfg.indexVersion;
- this.buildBitmaps = cfg.buildBitmaps;
- this.bitmapContiguousCommitCount = cfg.bitmapContiguousCommitCount;
- this.bitmapRecentCommitCount = cfg.bitmapRecentCommitCount;
- this.bitmapRecentCommitSpan = cfg.bitmapRecentCommitSpan;
- this.bitmapDistantCommitSpan = cfg.bitmapDistantCommitSpan;
- this.bitmapExcessiveBranchCount = cfg.bitmapExcessiveBranchCount;
- this.bitmapInactiveBranchAgeInDays = cfg.bitmapInactiveBranchAgeInDays;
- this.cutDeltaChains = cfg.cutDeltaChains;
- this.singlePack = cfg.singlePack;
- this.searchForReuseTimeout = cfg.searchForReuseTimeout;
- }
-
- /**
- * Check whether to reuse deltas existing in repository.
- *
- * Default setting: {@value #DEFAULT_REUSE_DELTAS}
- *
- * @return true if object is configured to reuse deltas; false otherwise.
- */
- public boolean isReuseDeltas() {
- return reuseDeltas;
- }
-
- /**
- * Set reuse deltas configuration option for the writer.
- *
- * When enabled, writer will search for delta representation of object in
- * repository and use it if possible. Normally, only deltas with base to
- * another object existing in set of objects to pack will be used. The
- * exception however is thin-packs where the base object may exist on the
- * other side.
- *
- * When raw delta data is directly copied from a pack file, its checksum is
- * computed to verify the data is not corrupt.
- *
- * Default setting: {@value #DEFAULT_REUSE_DELTAS}
- *
- * @param reuseDeltas
- * boolean indicating whether or not try to reuse deltas.
- */
- public void setReuseDeltas(boolean reuseDeltas) {
- this.reuseDeltas = reuseDeltas;
- }
-
- /**
- * Checks whether to reuse existing objects representation in repository.
- *
- * Default setting: {@value #DEFAULT_REUSE_OBJECTS}
- *
- * @return true if writer is configured to reuse objects representation from
- * pack; false otherwise.
- */
- public boolean isReuseObjects() {
- return reuseObjects;
- }
-
- /**
- * Set reuse objects configuration option for the writer.
- *
- * If enabled, writer searches for compressed representation in a pack file.
- * If possible, compressed data is directly copied from such a pack file.
- * Data checksum is verified.
- *
- * Default setting: {@value #DEFAULT_REUSE_OBJECTS}
- *
- * @param reuseObjects
- * boolean indicating whether or not writer should reuse existing
- * objects representation.
- */
- public void setReuseObjects(boolean reuseObjects) {
- this.reuseObjects = reuseObjects;
- }
-
- /**
- * Checks whether to preserve old packs in a preserved directory
- *
- * Default setting: {@value #DEFAULT_PRESERVE_OLD_PACKS}
- *
- * @return true if repacking will preserve old pack files.
- * @since 4.7
- */
- public boolean isPreserveOldPacks() {
- return preserveOldPacks;
- }
-
- /**
- * Set preserve old packs configuration option for repacking.
- *
- * If enabled, old pack files are moved into a preserved subdirectory instead
- * of being deleted
- *
- * Default setting: {@value #DEFAULT_PRESERVE_OLD_PACKS}
- *
- * @param preserveOldPacks
- * boolean indicating whether or not preserve old pack files
- * @since 4.7
- */
- public void setPreserveOldPacks(boolean preserveOldPacks) {
- this.preserveOldPacks = preserveOldPacks;
- }
-
- /**
- * Checks whether to remove preserved pack files in a preserved directory
- *
- * Default setting: {@value #DEFAULT_PRUNE_PRESERVED}
- *
- * @return true if repacking will remove preserved pack files.
- * @since 4.7
- */
- public boolean isPrunePreserved() {
- return prunePreserved;
- }
-
- /**
- * Set prune preserved configuration option for repacking.
- *
- * If enabled, preserved pack files are removed from a preserved subdirectory
- *
- * Default setting: {@value #DEFAULT_PRESERVE_OLD_PACKS}
- *
- * @param prunePreserved
- * boolean indicating whether or not preserve old pack files
- * @since 4.7
- */
- public void setPrunePreserved(boolean prunePreserved) {
- this.prunePreserved = prunePreserved;
- }
-
- /**
- * True if writer can use offsets to point to a delta base.
- *
- * If true the writer may choose to use an offset to point to a delta base
- * in the same pack, this is a newer style of reference that saves space.
- * False if the writer has to use the older (and more compatible style) of
- * storing the full ObjectId of the delta base.
- *
- * Default setting: {@value #DEFAULT_DELTA_BASE_AS_OFFSET}
- *
- * @return true if delta base is stored as an offset; false if it is stored
- * as an ObjectId.
- */
- public boolean isDeltaBaseAsOffset() {
- return deltaBaseAsOffset;
- }
-
- /**
- * Set writer delta base format.
- *
- * Delta base can be written as an offset in a pack file (new approach
- * reducing file size) or as an object id (legacy approach, compatible with
- * old readers).
- *
- * Default setting: {@value #DEFAULT_DELTA_BASE_AS_OFFSET}
- *
- * @param deltaBaseAsOffset
- * boolean indicating whether delta base can be stored as an
- * offset.
- */
- public void setDeltaBaseAsOffset(boolean deltaBaseAsOffset) {
- this.deltaBaseAsOffset = deltaBaseAsOffset;
- }
-
- /**
- * Check whether the writer will create new deltas on the fly.
- *
- * Default setting: {@value #DEFAULT_DELTA_COMPRESS}
- *
- * @return true if the writer will create a new delta when either
- * {@link #isReuseDeltas()} is false, or no suitable delta is
- * available for reuse.
- */
- public boolean isDeltaCompress() {
- return deltaCompress;
- }
-
- /**
- * Set whether or not the writer will create new deltas on the fly.
- *
- * Default setting: {@value #DEFAULT_DELTA_COMPRESS}
- *
- * @param deltaCompress
- * true to create deltas when {@link #isReuseDeltas()} is false,
- * or when a suitable delta isn't available for reuse. Set to
- * false to write whole objects instead.
- */
- public void setDeltaCompress(boolean deltaCompress) {
- this.deltaCompress = deltaCompress;
- }
-
- /**
- * Get maximum depth of delta chain set up for the writer.
- *
- * Generated chains are not longer than this value.
- *
- * Default setting: {@value #DEFAULT_MAX_DELTA_DEPTH}
- *
- * @return maximum delta chain depth.
- */
- public int getMaxDeltaDepth() {
- return maxDeltaDepth;
- }
-
- /**
- * Set up maximum depth of delta chain for the writer.
- *
- * Generated chains are not longer than this value. Too low value causes low
- * compression level, while too big makes unpacking (reading) longer.
- *
- * Default setting: {@value #DEFAULT_MAX_DELTA_DEPTH}
- *
- * @param maxDeltaDepth
- * maximum delta chain depth.
- */
- public void setMaxDeltaDepth(int maxDeltaDepth) {
- this.maxDeltaDepth = maxDeltaDepth;
- }
-
- /**
- * Whether existing delta chains should be cut at
- * {@link #getMaxDeltaDepth()}.
- *
- * @return true if existing delta chains should be cut at
- * {@link #getMaxDeltaDepth()}. Default is false, allowing existing
- * chains to be of any length.
- * @since 3.0
- */
- public boolean getCutDeltaChains() {
- return cutDeltaChains;
- }
-
- /**
- * Enable cutting existing delta chains at {@link #getMaxDeltaDepth()}.
- *
- * By default this is disabled and existing chains are kept at whatever
- * length a prior packer was configured to create. This allows objects to be
- * packed one with a large depth (for example 250), and later to quickly
- * repack the repository with a shorter depth (such as 50), but reusing the
- * complete delta chains created by the earlier 250 depth.
- *
- * @param cut
- * true to cut existing chains.
- * @since 3.0
- */
- public void setCutDeltaChains(boolean cut) {
- cutDeltaChains = cut;
- }
-
- /**
- * Whether all of refs/* should be packed in a single pack.
- *
- * @return true if all of refs/* should be packed in a single pack. Default
- * is false, packing a separate GC_REST pack for references outside
- * of refs/heads/* and refs/tags/*.
- * @since 4.9
- */
- public boolean getSinglePack() {
- return singlePack;
- }
-
- /**
- * If {@code true}, packs a single GC pack for all objects reachable from
- * refs/*. Otherwise packs the GC pack with objects reachable from
- * refs/heads/* and refs/tags/*, and a GC_REST pack with the remaining
- * reachable objects. Disabled by default, packing GC and GC_REST.
- *
- * @param single
- * true to pack a single GC pack rather than GC and GC_REST packs
- * @since 4.9
- */
- public void setSinglePack(boolean single) {
- singlePack = single;
- }
-
- /**
- * Get the number of objects to try when looking for a delta base.
- *
- * This limit is per thread, if 4 threads are used the actual memory used
- * will be 4 times this value.
- *
- * Default setting: {@value #DEFAULT_DELTA_SEARCH_WINDOW_SIZE}
- *
- * @return the object count to be searched.
- */
- public int getDeltaSearchWindowSize() {
- return deltaSearchWindowSize;
- }
-
- /**
- * Set the number of objects considered when searching for a delta base.
- *
- * Default setting: {@value #DEFAULT_DELTA_SEARCH_WINDOW_SIZE}
- *
- * @param objectCount
- * number of objects to search at once. Must be at least 2.
- */
- public void setDeltaSearchWindowSize(int objectCount) {
- if (objectCount <= 2)
- setDeltaCompress(false);
- else
- deltaSearchWindowSize = objectCount;
- }
-
- /**
- * Get maximum number of bytes to put into the delta search window.
- *
- * Default setting is 0, for an unlimited amount of memory usage. Actual
- * memory used is the lower limit of either this setting, or the sum of
- * space used by at most {@link #getDeltaSearchWindowSize()} objects.
- *
- * This limit is per thread, if 4 threads are used the actual memory limit
- * will be 4 times this value.
- *
- * @return the memory limit.
- */
- public long getDeltaSearchMemoryLimit() {
- return deltaSearchMemoryLimit;
- }
-
- /**
- * Set the maximum number of bytes to put into the delta search window.
- *
- * Default setting is 0, for an unlimited amount of memory usage. If the
- * memory limit is reached before {@link #getDeltaSearchWindowSize()} the
- * window size is temporarily lowered.
- *
- * @param memoryLimit
- * Maximum number of bytes to load at once, 0 for unlimited.
- */
- public void setDeltaSearchMemoryLimit(long memoryLimit) {
- deltaSearchMemoryLimit = memoryLimit;
- }
-
- /**
- * Get the size of the in-memory delta cache.
- *
- * This limit is for the entire writer, even if multiple threads are used.
- *
- * Default setting: {@value #DEFAULT_DELTA_CACHE_SIZE}
- *
- * @return maximum number of bytes worth of delta data to cache in memory.
- * If 0 the cache is infinite in size (up to the JVM heap limit
- * anyway). A very tiny size such as 1 indicates the cache is
- * effectively disabled.
- */
- public long getDeltaCacheSize() {
- return deltaCacheSize;
- }
-
- /**
- * Set the maximum number of bytes of delta data to cache.
- *
- * During delta search, up to this many bytes worth of small or hard to
- * compute deltas will be stored in memory. This cache speeds up writing by
- * allowing the cached entry to simply be dumped to the output stream.
- *
- * Default setting: {@value #DEFAULT_DELTA_CACHE_SIZE}
- *
- * @param size
- * number of bytes to cache. Set to 0 to enable an infinite
- * cache, set to 1 (an impossible size for any delta) to disable
- * the cache.
- */
- public void setDeltaCacheSize(long size) {
- deltaCacheSize = size;
- }
-
- /**
- * Maximum size in bytes of a delta to cache.
- *
- * Default setting: {@value #DEFAULT_DELTA_CACHE_LIMIT}
- *
- * @return maximum size (in bytes) of a delta that should be cached.
- */
- public int getDeltaCacheLimit() {
- return deltaCacheLimit;
- }
-
- /**
- * Set the maximum size of a delta that should be cached.
- *
- * During delta search, any delta smaller than this size will be cached, up
- * to the {@link #getDeltaCacheSize()} maximum limit. This speeds up writing
- * by allowing these cached deltas to be output as-is.
- *
- * Default setting: {@value #DEFAULT_DELTA_CACHE_LIMIT}
- *
- * @param size
- * maximum size (in bytes) of a delta to be cached.
- */
- public void setDeltaCacheLimit(int size) {
- deltaCacheLimit = size;
- }
-
- /**
- * Get the maximum file size that will be delta compressed.
- *
- * Files bigger than this setting will not be delta compressed, as they are
- * more than likely already highly compressed binary data files that do not
- * delta compress well, such as MPEG videos.
- *
- * Default setting: {@value #DEFAULT_BIG_FILE_THRESHOLD}
- *
- * @return the configured big file threshold.
- */
- public int getBigFileThreshold() {
- return bigFileThreshold;
- }
-
- /**
- * Set the maximum file size that should be considered for deltas.
- *
- * Default setting: {@value #DEFAULT_BIG_FILE_THRESHOLD}
- *
- * @param bigFileThreshold
- * the limit, in bytes.
- */
- public void setBigFileThreshold(int bigFileThreshold) {
- this.bigFileThreshold = bigFileThreshold;
- }
-
- /**
- * Get whether we wait before opening a newly written pack to prevent its
- * lastModified timestamp could be racy
- *
- * @return whether we wait before opening a newly written pack to prevent
- * its lastModified timestamp could be racy
- * @since 5.1.8
- */
- public boolean isWaitPreventRacyPack() {
- return waitPreventRacyPack;
- }
-
- /**
- * Get whether we wait before opening a newly written pack to prevent its
- * lastModified timestamp could be racy. Returns {@code true} if
- * {@code waitToPreventRacyPack = true} and
- * {@code packSize > minSizePreventRacyPack}, {@code false} otherwise.
- *
- * @param packSize
- * size of the pack file
- *
- * @return whether we wait before opening a newly written pack to prevent
- * its lastModified timestamp could be racy
- * @since 5.1.8
- */
- public boolean doWaitPreventRacyPack(long packSize) {
- return isWaitPreventRacyPack()
- && packSize > getMinSizePreventRacyPack();
- }
-
- /**
- * Set whether we wait before opening a newly written pack to prevent its
- * lastModified timestamp could be racy
- *
- * @param waitPreventRacyPack
- * whether we wait before opening a newly written pack to prevent
- * its lastModified timestamp could be racy
- * @since 5.1.8
- */
- public void setWaitPreventRacyPack(boolean waitPreventRacyPack) {
- this.waitPreventRacyPack = waitPreventRacyPack;
- }
-
- /**
- * Get minimum packfile size for which we wait before opening a newly
- * written pack to prevent its lastModified timestamp could be racy if
- * {@code isWaitToPreventRacyPack} is {@code true}.
- *
- * @return minimum packfile size, default is 100 MiB
- *
- * @since 5.1.8
- */
- public long getMinSizePreventRacyPack() {
- return minSizePreventRacyPack;
- }
-
- /**
- * Set minimum packfile size for which we wait before opening a newly
- * written pack to prevent its lastModified timestamp could be racy if
- * {@code isWaitToPreventRacyPack} is {@code true}.
- *
- * @param minSizePreventRacyPack
- * minimum packfile size, default is 100 MiB
- *
- * @since 5.1.8
- */
- public void setMinSizePreventRacyPack(long minSizePreventRacyPack) {
- this.minSizePreventRacyPack = minSizePreventRacyPack;
- }
-
- /**
- * Get the compression level applied to objects in the pack.
- *
- * Default setting: {@value java.util.zip.Deflater#DEFAULT_COMPRESSION}
- *
- * @return current compression level, see {@link java.util.zip.Deflater}.
- */
- public int getCompressionLevel() {
- return compressionLevel;
- }
-
- /**
- * Set the compression level applied to objects in the pack.
- *
- * Default setting: {@value java.util.zip.Deflater#DEFAULT_COMPRESSION}
- *
- * @param level
- * compression level, must be a valid level recognized by the
- * {@link java.util.zip.Deflater} class.
- */
- public void setCompressionLevel(int level) {
- compressionLevel = level;
- }
-
- /**
- * Get the number of threads used during delta compression.
- *
- * Default setting: 0 (auto-detect processors)
- *
- * @return number of threads used for delta compression. 0 will auto-detect
- * the threads to the number of available processors.
- */
- public int getThreads() {
- return threads;
- }
-
- /**
- * Set the number of threads to use for delta compression.
- *
- * During delta compression, if there are enough objects to be considered
- * the writer will start up concurrent threads and allow them to compress
- * different sections of the repository concurrently.
- *
- * An application thread pool can be set by {@link #setExecutor(Executor)}.
- * If not set a temporary pool will be created by the writer, and torn down
- * automatically when compression is over.
- *
- * Default setting: 0 (auto-detect processors)
- *
- * @param threads
- * number of threads to use. If <= 0 the number of available
- * processors for this JVM is used.
- */
- public void setThreads(int threads) {
- this.threads = threads;
- }
-
- /**
- * Get the preferred thread pool to execute delta search on.
- *
- * @return the preferred thread pool to execute delta search on.
- */
- public Executor getExecutor() {
- return executor;
- }
-
- /**
- * Set the executor to use when using threads.
- *
- * During delta compression if the executor is non-null jobs will be queued
- * up on it to perform delta compression in parallel. Aside from setting the
- * executor, the caller must set {@link #setThreads(int)} to enable threaded
- * delta search.
- *
- * @param executor
- * executor to use for threads. Set to null to create a temporary
- * executor just for the writer.
- */
- public void setExecutor(Executor executor) {
- this.executor = executor;
- }
-
- /**
- * Get the pack index file format version this instance creates.
- *
- * Default setting: {@value #DEFAULT_INDEX_VERSION}
- *
- * @return the index version, the special version 0 designates the oldest
- * (most compatible) format available for the objects.
- * @see PackIndexWriter
- */
- public int getIndexVersion() {
- return indexVersion;
- }
-
- /**
- * Set the pack index file format version this instance will create.
- *
- * Default setting: {@value #DEFAULT_INDEX_VERSION}
- *
- * @param version
- * the version to write. The special version 0 designates the
- * oldest (most compatible) format available for the objects.
- * @see PackIndexWriter
- */
- public void setIndexVersion(int version) {
- indexVersion = version;
- }
-
- /**
- * True if writer is allowed to build bitmaps for indexes.
- *
- * Default setting: {@value #DEFAULT_BUILD_BITMAPS}
- *
- * @return true if delta base is the writer can choose to output an index
- * with bitmaps.
- * @since 3.0
- */
- public boolean isBuildBitmaps() {
- return buildBitmaps;
- }
-
- /**
- * Set writer to allow building bitmaps for supported pack files.
- *
- * Index files can include bitmaps to speed up future ObjectWalks.
- *
- * Default setting: {@value #DEFAULT_BUILD_BITMAPS}
- *
- * @param buildBitmaps
- * boolean indicating whether bitmaps may be included in the
- * index.
- * @since 3.0
- */
- public void setBuildBitmaps(boolean buildBitmaps) {
- this.buildBitmaps = buildBitmaps;
- }
-
- /**
- * Get the count of most recent commits for which to build bitmaps.
- *
- * Default setting: {@value #DEFAULT_BITMAP_CONTIGUOUS_COMMIT_COUNT}
- *
- * @return the count of most recent commits for which to build bitmaps
- * @since 4.2
- */
- public int getBitmapContiguousCommitCount() {
- return bitmapContiguousCommitCount;
- }
-
- /**
- * Set the count of most recent commits for which to build bitmaps.
- *
- * Default setting: {@value #DEFAULT_BITMAP_CONTIGUOUS_COMMIT_COUNT}
- *
- * @param count
- * the count of most recent commits for which to build bitmaps
- * @since 4.2
- */
- public void setBitmapContiguousCommitCount(int count) {
- bitmapContiguousCommitCount = count;
- }
-
- /**
- * Get the count at which to switch from "bitmapRecentCommitSpan" to
- * "bitmapDistantCommitSpan".
- *
- * Default setting: {@value #DEFAULT_BITMAP_RECENT_COMMIT_COUNT}
- *
- * @return the count for switching between recent and distant spans
- * @since 4.2
- */
- public int getBitmapRecentCommitCount() {
- return bitmapRecentCommitCount;
- }
-
- /**
- * Set the count at which to switch from "bitmapRecentCommitSpan" to
- * "bitmapDistantCommitSpan".
- *
- * Default setting: {@value #DEFAULT_BITMAP_RECENT_COMMIT_COUNT}
- *
- * @param count
- * the count for switching between recent and distant spans
- * @since 4.2
- */
- public void setBitmapRecentCommitCount(int count) {
- bitmapRecentCommitCount = count;
- }
-
- /**
- * Get the span of commits when building bitmaps for recent history.
- *
- * Default setting: {@value #DEFAULT_BITMAP_RECENT_COMMIT_SPAN}
- *
- * @return the span of commits when building bitmaps for recent history
- * @since 4.2
- */
- public int getBitmapRecentCommitSpan() {
- return bitmapRecentCommitSpan;
- }
-
- /**
- * Set the span of commits when building bitmaps for recent history.
- *
- * Default setting: {@value #DEFAULT_BITMAP_RECENT_COMMIT_SPAN}
- *
- * @param span
- * the span of commits when building bitmaps for recent history
- * @since 4.2
- */
- public void setBitmapRecentCommitSpan(int span) {
- bitmapRecentCommitSpan = span;
- }
-
- /**
- * Get the span of commits when building bitmaps for distant history.
- *
- * Default setting: {@value #DEFAULT_BITMAP_DISTANT_COMMIT_SPAN}
- *
- * @return the span of commits when building bitmaps for distant history
- * @since 4.2
- */
- public int getBitmapDistantCommitSpan() {
- return bitmapDistantCommitSpan;
- }
-
- /**
- * Set the span of commits when building bitmaps for distant history.
- *
- * Default setting: {@value #DEFAULT_BITMAP_DISTANT_COMMIT_SPAN}
- *
- * @param span
- * the span of commits when building bitmaps for distant history
- * @since 4.2
- */
- public void setBitmapDistantCommitSpan(int span) {
- bitmapDistantCommitSpan = span;
- }
-
- /**
- * Get the count of branches deemed "excessive". If the count of branches in
- * a repository exceeds this number and bitmaps are enabled, "inactive"
- * branches will have fewer bitmaps than "active" branches.
- *
- * Default setting: {@value #DEFAULT_BITMAP_EXCESSIVE_BRANCH_COUNT}
- *
- * @return the count of branches deemed "excessive"
- * @since 4.2
- */
- public int getBitmapExcessiveBranchCount() {
- return bitmapExcessiveBranchCount;
- }
-
- /**
- * Set the count of branches deemed "excessive". If the count of branches in
- * a repository exceeds this number and bitmaps are enabled, "inactive"
- * branches will have fewer bitmaps than "active" branches.
- *
- * Default setting: {@value #DEFAULT_BITMAP_EXCESSIVE_BRANCH_COUNT}
- *
- * @param count
- * the count of branches deemed "excessive"
- * @since 4.2
- */
- public void setBitmapExcessiveBranchCount(int count) {
- bitmapExcessiveBranchCount = count;
- }
-
- /**
- * Get the age in days that marks a branch as "inactive".
- *
- * Default setting: {@value #DEFAULT_BITMAP_INACTIVE_BRANCH_AGE_IN_DAYS}
- *
- * @return the age in days that marks a branch as "inactive"
- * @since 4.2
- */
- public int getBitmapInactiveBranchAgeInDays() {
- return bitmapInactiveBranchAgeInDays;
- }
-
- /**
- * Get the max time to spend during the search for reuse phase.
- *
- * Default setting: {@value #DEFAULT_SEARCH_FOR_REUSE_TIMEOUT}
- *
- * @return the maximum time to spend during the search for reuse phase.
- * @since 5.13
- */
- public Duration getSearchForReuseTimeout() {
- return searchForReuseTimeout;
- }
-
- /**
- * Set the age in days that marks a branch as "inactive".
- *
- * Default setting: {@value #DEFAULT_BITMAP_INACTIVE_BRANCH_AGE_IN_DAYS}
- *
- * @param ageInDays
- * the age in days that marks a branch as "inactive"
- * @since 4.2
- */
- public void setBitmapInactiveBranchAgeInDays(int ageInDays) {
- bitmapInactiveBranchAgeInDays = ageInDays;
- }
-
- /**
- * Set the max time to spend during the search for reuse phase.
- *
- * @param timeout
- * max time allowed during the search for reuse phase
- *
- * Default setting: {@value #DEFAULT_SEARCH_FOR_REUSE_TIMEOUT}
- * @since 5.13
- */
- public void setSearchForReuseTimeout(Duration timeout) {
- searchForReuseTimeout = timeout;
- }
-
- /**
- * Update properties by setting fields from the configuration.
- *
- * If a property's corresponding variable is not defined in the supplied
- * configuration, then it is left unmodified.
- *
- * @param rc
- * configuration to read properties from.
- */
- public void fromConfig(Config rc) {
- setMaxDeltaDepth(rc.getInt(CONFIG_PACK_SECTION, CONFIG_KEY_DEPTH,
- getMaxDeltaDepth()));
- setDeltaSearchWindowSize(rc.getInt(CONFIG_PACK_SECTION,
- CONFIG_KEY_WINDOW, getDeltaSearchWindowSize()));
- setDeltaSearchMemoryLimit(rc.getLong(CONFIG_PACK_SECTION,
- CONFIG_KEY_WINDOW_MEMORY, getDeltaSearchMemoryLimit()));
- setDeltaCacheSize(rc.getLong(CONFIG_PACK_SECTION,
- CONFIG_KEY_DELTA_CACHE_SIZE, getDeltaCacheSize()));
- setDeltaCacheLimit(rc.getInt(CONFIG_PACK_SECTION,
- CONFIG_KEY_DELTA_CACHE_LIMIT, getDeltaCacheLimit()));
- setCompressionLevel(rc.getInt(CONFIG_PACK_SECTION,
- CONFIG_KEY_COMPRESSION, rc.getInt(CONFIG_CORE_SECTION,
- CONFIG_KEY_COMPRESSION, getCompressionLevel())));
- setIndexVersion(rc.getInt(CONFIG_PACK_SECTION,
- CONFIG_KEY_INDEXVERSION,
- getIndexVersion()));
- setBigFileThreshold(rc.getInt(CONFIG_CORE_SECTION,
- CONFIG_KEY_BIGFILE_THRESHOLD, getBigFileThreshold()));
- setThreads(rc.getInt(CONFIG_PACK_SECTION, CONFIG_KEY_THREADS,
- getThreads()));
-
- // These variables aren't standardized
- setReuseDeltas(rc.getBoolean(CONFIG_PACK_SECTION,
- CONFIG_KEY_REUSE_DELTAS, isReuseDeltas()));
- setReuseObjects(rc.getBoolean(CONFIG_PACK_SECTION,
- CONFIG_KEY_REUSE_OBJECTS, isReuseObjects()));
- setDeltaCompress(rc.getBoolean(CONFIG_PACK_SECTION,
- CONFIG_KEY_DELTA_COMPRESSION, isDeltaCompress()));
- setCutDeltaChains(rc.getBoolean(CONFIG_PACK_SECTION,
- CONFIG_KEY_CUT_DELTACHAINS, getCutDeltaChains()));
- setSinglePack(rc.getBoolean(CONFIG_PACK_SECTION,
- CONFIG_KEY_SINGLE_PACK,
- getSinglePack()));
- setBuildBitmaps(rc.getBoolean(CONFIG_PACK_SECTION,
- CONFIG_KEY_BUILD_BITMAPS, isBuildBitmaps()));
- setBitmapContiguousCommitCount(rc.getInt(CONFIG_PACK_SECTION,
- CONFIG_KEY_BITMAP_CONTIGUOUS_COMMIT_COUNT,
- getBitmapContiguousCommitCount()));
- setBitmapRecentCommitCount(rc.getInt(CONFIG_PACK_SECTION,
- CONFIG_KEY_BITMAP_RECENT_COMMIT_COUNT,
- getBitmapRecentCommitCount()));
- setBitmapRecentCommitSpan(rc.getInt(CONFIG_PACK_SECTION,
- CONFIG_KEY_BITMAP_RECENT_COMMIT_COUNT,
- getBitmapRecentCommitSpan()));
- setBitmapDistantCommitSpan(rc.getInt(CONFIG_PACK_SECTION,
- CONFIG_KEY_BITMAP_DISTANT_COMMIT_SPAN,
- getBitmapDistantCommitSpan()));
- setBitmapExcessiveBranchCount(rc.getInt(CONFIG_PACK_SECTION,
- CONFIG_KEY_BITMAP_EXCESSIVE_BRANCH_COUNT,
- getBitmapExcessiveBranchCount()));
- setBitmapInactiveBranchAgeInDays(rc.getInt(CONFIG_PACK_SECTION,
- CONFIG_KEY_BITMAP_INACTIVE_BRANCH_AGE_INDAYS,
- getBitmapInactiveBranchAgeInDays()));
- setSearchForReuseTimeout(Duration.ofSeconds(rc.getTimeUnit(
- CONFIG_PACK_SECTION, null,
- CONFIG_KEY_SEARCH_FOR_REUSE_TIMEOUT,
- getSearchForReuseTimeout().getSeconds(), TimeUnit.SECONDS)));
- setWaitPreventRacyPack(rc.getBoolean(CONFIG_PACK_SECTION,
- CONFIG_KEY_WAIT_PREVENT_RACYPACK, isWaitPreventRacyPack()));
- setMinSizePreventRacyPack(rc.getLong(CONFIG_PACK_SECTION,
- CONFIG_KEY_MIN_SIZE_PREVENT_RACYPACK,
- getMinSizePreventRacyPack()));
- }
-
- /** {@inheritDoc} */
- @Override
- public String toString() {
- final StringBuilder b = new StringBuilder();
- b.append("maxDeltaDepth=").append(getMaxDeltaDepth()); //$NON-NLS-1$
- b.append(", deltaSearchWindowSize=").append(getDeltaSearchWindowSize()); //$NON-NLS-1$
- b.append(", deltaSearchMemoryLimit=") //$NON-NLS-1$
- .append(getDeltaSearchMemoryLimit());
- b.append(", deltaCacheSize=").append(getDeltaCacheSize()); //$NON-NLS-1$
- b.append(", deltaCacheLimit=").append(getDeltaCacheLimit()); //$NON-NLS-1$
- b.append(", compressionLevel=").append(getCompressionLevel()); //$NON-NLS-1$
- b.append(", indexVersion=").append(getIndexVersion()); //$NON-NLS-1$
- b.append(", bigFileThreshold=").append(getBigFileThreshold()); //$NON-NLS-1$
- b.append(", threads=").append(getThreads()); //$NON-NLS-1$
- b.append(", reuseDeltas=").append(isReuseDeltas()); //$NON-NLS-1$
- b.append(", reuseObjects=").append(isReuseObjects()); //$NON-NLS-1$
- b.append(", deltaCompress=").append(isDeltaCompress()); //$NON-NLS-1$
- b.append(", buildBitmaps=").append(isBuildBitmaps()); //$NON-NLS-1$
- b.append(", bitmapContiguousCommitCount=") //$NON-NLS-1$
- .append(getBitmapContiguousCommitCount());
- b.append(", bitmapRecentCommitCount=") //$NON-NLS-1$
- .append(getBitmapRecentCommitCount());
- b.append(", bitmapRecentCommitSpan=") //$NON-NLS-1$
- .append(getBitmapRecentCommitSpan());
- b.append(", bitmapDistantCommitSpan=") //$NON-NLS-1$
- .append(getBitmapDistantCommitSpan());
- b.append(", bitmapExcessiveBranchCount=") //$NON-NLS-1$
- .append(getBitmapExcessiveBranchCount());
- b.append(", bitmapInactiveBranchAge=") //$NON-NLS-1$
- .append(getBitmapInactiveBranchAgeInDays());
- b.append(", searchForReuseTimeout") //$NON-NLS-1$
- .append(getSearchForReuseTimeout());
- b.append(", singlePack=").append(getSinglePack()); //$NON-NLS-1$
- return b.toString();
- }
- }
|