1 /*
2 * Copyright (C) 2008-2010, Google Inc.
3 * Copyright (C) 2008, Marek Zawirski <marek.zawirski@gmail.com>
4 * and other copyright owners as documented in the project's IP log.
5 *
6 * This program and the accompanying materials are made available
7 * under the terms of the Eclipse Distribution License v1.0 which
8 * accompanies this distribution, is reproduced below, and is
9 * available at http://www.eclipse.org/org/documents/edl-v10.php
10 *
11 * All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials provided
23 * with the distribution.
24 *
25 * - Neither the name of the Eclipse Foundation, Inc. nor the
26 * names of its contributors may be used to endorse or promote
27 * products derived from this software without specific prior
28 * written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
31 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
32 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
33 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
35 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
37 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
38 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
39 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
42 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 */
44
45 package org.eclipse.jgit.storage.pack;
46
47 import java.util.concurrent.Executor;
48 import java.util.zip.Deflater;
49
50 import org.eclipse.jgit.internal.storage.file.PackIndexWriter;
51 import org.eclipse.jgit.lib.Config;
52 import org.eclipse.jgit.lib.Repository;
53
54 /**
55 * Configuration used by a pack writer when constructing the stream.
56 *
57 * A configuration may be modified once created, but should not be modified
58 * while it is being used by a PackWriter. If a configuration is not modified it
59 * is safe to share the same configuration instance between multiple concurrent
60 * threads executing different PackWriters.
61 */
62 public class PackConfig {
63 /**
64 * Default value of deltas reuse option: {@value}
65 *
66 * @see #setReuseDeltas(boolean)
67 */
68 public static final boolean DEFAULT_REUSE_DELTAS = true;
69
70 /**
71 * Default value of objects reuse option: {@value}
72 *
73 * @see #setReuseObjects(boolean)
74 */
75 public static final boolean DEFAULT_REUSE_OBJECTS = true;
76
77 /**
78 * Default value of keep old packs option: {@value}
79 * @see #setPreserveOldPacks(boolean)
80 * @since 4.7
81 */
82 public static final boolean DEFAULT_PRESERVE_OLD_PACKS = false;
83
84 /**
85 * Default value of prune old packs option: {@value}
86 * @see #setPrunePreserved(boolean)
87 * @since 4.7
88 */
89 public static final boolean DEFAULT_PRUNE_PRESERVED = false;
90
91 /**
92 * Default value of delta compress option: {@value}
93 *
94 * @see #setDeltaCompress(boolean)
95 */
96 public static final boolean DEFAULT_DELTA_COMPRESS = true;
97
98 /**
99 * Default value of delta base as offset option: {@value}
100 *
101 * @see #setDeltaBaseAsOffset(boolean)
102 */
103 public static final boolean DEFAULT_DELTA_BASE_AS_OFFSET = false;
104
105 /**
106 * Default value of maximum delta chain depth: {@value}
107 *
108 * @see #setMaxDeltaDepth(int)
109 */
110 public static final int DEFAULT_MAX_DELTA_DEPTH = 50;
111
112 /**
113 * Default window size during packing: {@value}
114 *
115 * @see #setDeltaSearchWindowSize(int)
116 */
117 public static final int DEFAULT_DELTA_SEARCH_WINDOW_SIZE = 10;
118
119 /**
120 * Default big file threshold: {@value}
121 *
122 * @see #setBigFileThreshold(int)
123 */
124 public static final int DEFAULT_BIG_FILE_THRESHOLD = 50 * 1024 * 1024;
125
126 /**
127 * Default delta cache size: {@value}
128 *
129 * @see #setDeltaCacheSize(long)
130 */
131 public static final long DEFAULT_DELTA_CACHE_SIZE = 50 * 1024 * 1024;
132
133 /**
134 * Default delta cache limit: {@value}
135 *
136 * @see #setDeltaCacheLimit(int)
137 */
138 public static final int DEFAULT_DELTA_CACHE_LIMIT = 100;
139
140 /**
141 * Default index version: {@value}
142 *
143 * @see #setIndexVersion(int)
144 */
145 public static final int DEFAULT_INDEX_VERSION = 2;
146
147 /**
148 * Default value of the build bitmaps option: {@value}
149 *
150 * @see #setBuildBitmaps(boolean)
151 * @since 3.0
152 */
153 public static final boolean DEFAULT_BUILD_BITMAPS = true;
154
155 /**
156 * Default count of most recent commits to select for bitmaps. Only applies
157 * when bitmaps are enabled: {@value}
158 *
159 * @see #setBitmapContiguousCommitCount(int)
160 * @since 4.2
161 */
162 public static final int DEFAULT_BITMAP_CONTIGUOUS_COMMIT_COUNT = 100;
163
164 /**
165 * Count at which the span between selected commits changes from
166 * "bitmapRecentCommitSpan" to "bitmapDistantCommitSpan". Only applies when
167 * bitmaps are enabled: {@value}
168 *
169 * @see #setBitmapRecentCommitCount(int)
170 * @since 4.2
171 */
172 public static final int DEFAULT_BITMAP_RECENT_COMMIT_COUNT = 20000;
173
174 /**
175 * Default spacing between commits in recent history when selecting commits
176 * for bitmaps. Only applies when bitmaps are enabled: {@value}
177 *
178 * @see #setBitmapRecentCommitSpan(int)
179 * @since 4.2
180 */
181 public static final int DEFAULT_BITMAP_RECENT_COMMIT_SPAN = 100;
182
183 /**
184 * Default spacing between commits in distant history when selecting commits
185 * for bitmaps. Only applies when bitmaps are enabled: {@value}
186 *
187 * @see #setBitmapDistantCommitSpan(int)
188 * @since 4.2
189 */
190 public static final int DEFAULT_BITMAP_DISTANT_COMMIT_SPAN = 5000;
191
192 /**
193 * Default count of branches required to activate inactive branch commit
194 * selection. If the number of branches is less than this then bitmaps for
195 * the entire commit history of all branches will be created, otherwise
196 * branches marked as "inactive" will have coverage for only partial
197 * history: {@value}
198 *
199 * @see #setBitmapExcessiveBranchCount(int)
200 * @since 4.2
201 */
202 public static final int DEFAULT_BITMAP_EXCESSIVE_BRANCH_COUNT = 100;
203
204 /**
205 * Default age at which a branch is considered inactive. Age is taken as the
206 * number of days ago that the most recent commit was made to a branch. Only
207 * affects bitmap processing if bitmaps are enabled and the
208 * "excessive branch count" has been exceeded: {@value}
209 *
210 * @see #setBitmapInactiveBranchAgeInDays(int)
211 * @since 4.2
212 */
213 public static final int DEFAULT_BITMAP_INACTIVE_BRANCH_AGE_IN_DAYS = 90;
214
215 private int compressionLevel = Deflater.DEFAULT_COMPRESSION;
216
217 private boolean reuseDeltas = DEFAULT_REUSE_DELTAS;
218
219 private boolean reuseObjects = DEFAULT_REUSE_OBJECTS;
220
221 private boolean preserveOldPacks = DEFAULT_PRESERVE_OLD_PACKS;
222
223 private boolean prunePreserved = DEFAULT_PRUNE_PRESERVED;
224
225 private boolean deltaBaseAsOffset = DEFAULT_DELTA_BASE_AS_OFFSET;
226
227 private boolean deltaCompress = DEFAULT_DELTA_COMPRESS;
228
229 private int maxDeltaDepth = DEFAULT_MAX_DELTA_DEPTH;
230
231 private int deltaSearchWindowSize = DEFAULT_DELTA_SEARCH_WINDOW_SIZE;
232
233 private long deltaSearchMemoryLimit;
234
235 private long deltaCacheSize = DEFAULT_DELTA_CACHE_SIZE;
236
237 private int deltaCacheLimit = DEFAULT_DELTA_CACHE_LIMIT;
238
239 private int bigFileThreshold = DEFAULT_BIG_FILE_THRESHOLD;
240
241 private int threads;
242
243 private Executor executor;
244
245 private int indexVersion = DEFAULT_INDEX_VERSION;
246
247 private boolean buildBitmaps = DEFAULT_BUILD_BITMAPS;
248
249 private int bitmapContiguousCommitCount = DEFAULT_BITMAP_CONTIGUOUS_COMMIT_COUNT;
250
251 private int bitmapRecentCommitCount = DEFAULT_BITMAP_RECENT_COMMIT_COUNT;
252
253 private int bitmapRecentCommitSpan = DEFAULT_BITMAP_RECENT_COMMIT_SPAN;
254
255 private int bitmapDistantCommitSpan = DEFAULT_BITMAP_DISTANT_COMMIT_SPAN;
256
257 private int bitmapExcessiveBranchCount = DEFAULT_BITMAP_EXCESSIVE_BRANCH_COUNT;
258
259 private int bitmapInactiveBranchAgeInDays = DEFAULT_BITMAP_INACTIVE_BRANCH_AGE_IN_DAYS;
260
261 private boolean cutDeltaChains;
262
263 private boolean singlePack;
264
265 /**
266 * Create a default configuration.
267 */
268 public PackConfig() {
269 // Fields are initialized to defaults.
270 }
271
272 /**
273 * Create a configuration honoring the repository's settings.
274 *
275 * @param db
276 * the repository to read settings from. The repository is not
277 * retained by the new configuration, instead its settings are
278 * copied during the constructor.
279 */
280 public PackConfig(Repository db) {
281 fromConfig(db.getConfig());
282 }
283
284 /**
285 * Create a configuration honoring settings in a
286 * {@link org.eclipse.jgit.lib.Config}.
287 *
288 * @param cfg
289 * the source to read settings from. The source is not retained
290 * by the new configuration, instead its settings are copied
291 * during the constructor.
292 */
293 public PackConfig(Config cfg) {
294 fromConfig(cfg);
295 }
296
297 /**
298 * Copy an existing configuration to a new instance.
299 *
300 * @param cfg
301 * the source configuration to copy from.
302 */
303 public PackConfighref="../../../../../org/eclipse/jgit/storage/pack/PackConfig.html#PackConfig">PackConfig(PackConfig cfg) {
304 this.compressionLevel = cfg.compressionLevel;
305 this.reuseDeltas = cfg.reuseDeltas;
306 this.reuseObjects = cfg.reuseObjects;
307 this.preserveOldPacks = cfg.preserveOldPacks;
308 this.prunePreserved = cfg.prunePreserved;
309 this.deltaBaseAsOffset = cfg.deltaBaseAsOffset;
310 this.deltaCompress = cfg.deltaCompress;
311 this.maxDeltaDepth = cfg.maxDeltaDepth;
312 this.deltaSearchWindowSize = cfg.deltaSearchWindowSize;
313 this.deltaSearchMemoryLimit = cfg.deltaSearchMemoryLimit;
314 this.deltaCacheSize = cfg.deltaCacheSize;
315 this.deltaCacheLimit = cfg.deltaCacheLimit;
316 this.bigFileThreshold = cfg.bigFileThreshold;
317 this.threads = cfg.threads;
318 this.executor = cfg.executor;
319 this.indexVersion = cfg.indexVersion;
320 this.buildBitmaps = cfg.buildBitmaps;
321 this.bitmapContiguousCommitCount = cfg.bitmapContiguousCommitCount;
322 this.bitmapRecentCommitCount = cfg.bitmapRecentCommitCount;
323 this.bitmapRecentCommitSpan = cfg.bitmapRecentCommitSpan;
324 this.bitmapDistantCommitSpan = cfg.bitmapDistantCommitSpan;
325 this.bitmapExcessiveBranchCount = cfg.bitmapExcessiveBranchCount;
326 this.bitmapInactiveBranchAgeInDays = cfg.bitmapInactiveBranchAgeInDays;
327 this.cutDeltaChains = cfg.cutDeltaChains;
328 this.singlePack = cfg.singlePack;
329 }
330
331 /**
332 * Check whether to reuse deltas existing in repository.
333 *
334 * Default setting: {@value #DEFAULT_REUSE_DELTAS}
335 *
336 * @return true if object is configured to reuse deltas; false otherwise.
337 */
338 public boolean isReuseDeltas() {
339 return reuseDeltas;
340 }
341
342 /**
343 * Set reuse deltas configuration option for the writer.
344 *
345 * When enabled, writer will search for delta representation of object in
346 * repository and use it if possible. Normally, only deltas with base to
347 * another object existing in set of objects to pack will be used. The
348 * exception however is thin-packs where the base object may exist on the
349 * other side.
350 *
351 * When raw delta data is directly copied from a pack file, its checksum is
352 * computed to verify the data is not corrupt.
353 *
354 * Default setting: {@value #DEFAULT_REUSE_DELTAS}
355 *
356 * @param reuseDeltas
357 * boolean indicating whether or not try to reuse deltas.
358 */
359 public void setReuseDeltas(boolean reuseDeltas) {
360 this.reuseDeltas = reuseDeltas;
361 }
362
363 /**
364 * Checks whether to reuse existing objects representation in repository.
365 *
366 * Default setting: {@value #DEFAULT_REUSE_OBJECTS}
367 *
368 * @return true if writer is configured to reuse objects representation from
369 * pack; false otherwise.
370 */
371 public boolean isReuseObjects() {
372 return reuseObjects;
373 }
374
375 /**
376 * Set reuse objects configuration option for the writer.
377 *
378 * If enabled, writer searches for compressed representation in a pack file.
379 * If possible, compressed data is directly copied from such a pack file.
380 * Data checksum is verified.
381 *
382 * Default setting: {@value #DEFAULT_REUSE_OBJECTS}
383 *
384 * @param reuseObjects
385 * boolean indicating whether or not writer should reuse existing
386 * objects representation.
387 */
388 public void setReuseObjects(boolean reuseObjects) {
389 this.reuseObjects = reuseObjects;
390 }
391
392 /**
393 * Checks whether to preserve old packs in a preserved directory
394 *
395 * Default setting: {@value #DEFAULT_PRESERVE_OLD_PACKS}
396 *
397 * @return true if repacking will preserve old pack files.
398 * @since 4.7
399 */
400 public boolean isPreserveOldPacks() {
401 return preserveOldPacks;
402 }
403
404 /**
405 * Set preserve old packs configuration option for repacking.
406 *
407 * If enabled, old pack files are moved into a preserved subdirectory instead
408 * of being deleted
409 *
410 * Default setting: {@value #DEFAULT_PRESERVE_OLD_PACKS}
411 *
412 * @param preserveOldPacks
413 * boolean indicating whether or not preserve old pack files
414 * @since 4.7
415 */
416 public void setPreserveOldPacks(boolean preserveOldPacks) {
417 this.preserveOldPacks = preserveOldPacks;
418 }
419
420 /**
421 * Checks whether to remove preserved pack files in a preserved directory
422 *
423 * Default setting: {@value #DEFAULT_PRUNE_PRESERVED}
424 *
425 * @return true if repacking will remove preserved pack files.
426 * @since 4.7
427 */
428 public boolean isPrunePreserved() {
429 return prunePreserved;
430 }
431
432 /**
433 * Set prune preserved configuration option for repacking.
434 *
435 * If enabled, preserved pack files are removed from a preserved subdirectory
436 *
437 * Default setting: {@value #DEFAULT_PRESERVE_OLD_PACKS}
438 *
439 * @param prunePreserved
440 * boolean indicating whether or not preserve old pack files
441 * @since 4.7
442 */
443 public void setPrunePreserved(boolean prunePreserved) {
444 this.prunePreserved = prunePreserved;
445 }
446
447 /**
448 * True if writer can use offsets to point to a delta base.
449 *
450 * If true the writer may choose to use an offset to point to a delta base
451 * in the same pack, this is a newer style of reference that saves space.
452 * False if the writer has to use the older (and more compatible style) of
453 * storing the full ObjectId of the delta base.
454 *
455 * Default setting: {@value #DEFAULT_DELTA_BASE_AS_OFFSET}
456 *
457 * @return true if delta base is stored as an offset; false if it is stored
458 * as an ObjectId.
459 */
460 public boolean isDeltaBaseAsOffset() {
461 return deltaBaseAsOffset;
462 }
463
464 /**
465 * Set writer delta base format.
466 *
467 * Delta base can be written as an offset in a pack file (new approach
468 * reducing file size) or as an object id (legacy approach, compatible with
469 * old readers).
470 *
471 * Default setting: {@value #DEFAULT_DELTA_BASE_AS_OFFSET}
472 *
473 * @param deltaBaseAsOffset
474 * boolean indicating whether delta base can be stored as an
475 * offset.
476 */
477 public void setDeltaBaseAsOffset(boolean deltaBaseAsOffset) {
478 this.deltaBaseAsOffset = deltaBaseAsOffset;
479 }
480
481 /**
482 * Check whether the writer will create new deltas on the fly.
483 *
484 * Default setting: {@value #DEFAULT_DELTA_COMPRESS}
485 *
486 * @return true if the writer will create a new delta when either
487 * {@link #isReuseDeltas()} is false, or no suitable delta is
488 * available for reuse.
489 */
490 public boolean isDeltaCompress() {
491 return deltaCompress;
492 }
493
494 /**
495 * Set whether or not the writer will create new deltas on the fly.
496 *
497 * Default setting: {@value #DEFAULT_DELTA_COMPRESS}
498 *
499 * @param deltaCompress
500 * true to create deltas when {@link #isReuseDeltas()} is false,
501 * or when a suitable delta isn't available for reuse. Set to
502 * false to write whole objects instead.
503 */
504 public void setDeltaCompress(boolean deltaCompress) {
505 this.deltaCompress = deltaCompress;
506 }
507
508 /**
509 * Get maximum depth of delta chain set up for the writer.
510 *
511 * Generated chains are not longer than this value.
512 *
513 * Default setting: {@value #DEFAULT_MAX_DELTA_DEPTH}
514 *
515 * @return maximum delta chain depth.
516 */
517 public int getMaxDeltaDepth() {
518 return maxDeltaDepth;
519 }
520
521 /**
522 * Set up maximum depth of delta chain for the writer.
523 *
524 * Generated chains are not longer than this value. Too low value causes low
525 * compression level, while too big makes unpacking (reading) longer.
526 *
527 * Default setting: {@value #DEFAULT_MAX_DELTA_DEPTH}
528 *
529 * @param maxDeltaDepth
530 * maximum delta chain depth.
531 */
532 public void setMaxDeltaDepth(int maxDeltaDepth) {
533 this.maxDeltaDepth = maxDeltaDepth;
534 }
535
536 /**
537 * Whether existing delta chains should be cut at
538 * {@link #getMaxDeltaDepth()}.
539 *
540 * @return true if existing delta chains should be cut at
541 * {@link #getMaxDeltaDepth()}. Default is false, allowing existing
542 * chains to be of any length.
543 * @since 3.0
544 */
545 public boolean getCutDeltaChains() {
546 return cutDeltaChains;
547 }
548
549 /**
550 * Enable cutting existing delta chains at {@link #getMaxDeltaDepth()}.
551 *
552 * By default this is disabled and existing chains are kept at whatever
553 * length a prior packer was configured to create. This allows objects to be
554 * packed one with a large depth (for example 250), and later to quickly
555 * repack the repository with a shorter depth (such as 50), but reusing the
556 * complete delta chains created by the earlier 250 depth.
557 *
558 * @param cut
559 * true to cut existing chains.
560 * @since 3.0
561 */
562 public void setCutDeltaChains(boolean cut) {
563 cutDeltaChains = cut;
564 }
565
566 /**
567 * Whether all of refs/* should be packed in a single pack.
568 *
569 * @return true if all of refs/* should be packed in a single pack. Default
570 * is false, packing a separate GC_REST pack for references outside
571 * of refs/heads/* and refs/tags/*.
572 * @since 4.9
573 */
574 public boolean getSinglePack() {
575 return singlePack;
576 }
577
578 /**
579 * If {@code true}, packs a single GC pack for all objects reachable from
580 * refs/*. Otherwise packs the GC pack with objects reachable from
581 * refs/heads/* and refs/tags/*, and a GC_REST pack with the remaining
582 * reachable objects. Disabled by default, packing GC and GC_REST.
583 *
584 * @param single
585 * true to pack a single GC pack rather than GC and GC_REST packs
586 * @since 4.9
587 */
588 public void setSinglePack(boolean single) {
589 singlePack = single;
590 }
591
592 /**
593 * Get the number of objects to try when looking for a delta base.
594 *
595 * This limit is per thread, if 4 threads are used the actual memory used
596 * will be 4 times this value.
597 *
598 * Default setting: {@value #DEFAULT_DELTA_SEARCH_WINDOW_SIZE}
599 *
600 * @return the object count to be searched.
601 */
602 public int getDeltaSearchWindowSize() {
603 return deltaSearchWindowSize;
604 }
605
606 /**
607 * Set the number of objects considered when searching for a delta base.
608 *
609 * Default setting: {@value #DEFAULT_DELTA_SEARCH_WINDOW_SIZE}
610 *
611 * @param objectCount
612 * number of objects to search at once. Must be at least 2.
613 */
614 public void setDeltaSearchWindowSize(int objectCount) {
615 if (objectCount <= 2)
616 setDeltaCompress(false);
617 else
618 deltaSearchWindowSize = objectCount;
619 }
620
621 /**
622 * Get maximum number of bytes to put into the delta search window.
623 *
624 * Default setting is 0, for an unlimited amount of memory usage. Actual
625 * memory used is the lower limit of either this setting, or the sum of
626 * space used by at most {@link #getDeltaSearchWindowSize()} objects.
627 *
628 * This limit is per thread, if 4 threads are used the actual memory limit
629 * will be 4 times this value.
630 *
631 * @return the memory limit.
632 */
633 public long getDeltaSearchMemoryLimit() {
634 return deltaSearchMemoryLimit;
635 }
636
637 /**
638 * Set the maximum number of bytes to put into the delta search window.
639 *
640 * Default setting is 0, for an unlimited amount of memory usage. If the
641 * memory limit is reached before {@link #getDeltaSearchWindowSize()} the
642 * window size is temporarily lowered.
643 *
644 * @param memoryLimit
645 * Maximum number of bytes to load at once, 0 for unlimited.
646 */
647 public void setDeltaSearchMemoryLimit(long memoryLimit) {
648 deltaSearchMemoryLimit = memoryLimit;
649 }
650
651 /**
652 * Get the size of the in-memory delta cache.
653 *
654 * This limit is for the entire writer, even if multiple threads are used.
655 *
656 * Default setting: {@value #DEFAULT_DELTA_CACHE_SIZE}
657 *
658 * @return maximum number of bytes worth of delta data to cache in memory.
659 * If 0 the cache is infinite in size (up to the JVM heap limit
660 * anyway). A very tiny size such as 1 indicates the cache is
661 * effectively disabled.
662 */
663 public long getDeltaCacheSize() {
664 return deltaCacheSize;
665 }
666
667 /**
668 * Set the maximum number of bytes of delta data to cache.
669 *
670 * During delta search, up to this many bytes worth of small or hard to
671 * compute deltas will be stored in memory. This cache speeds up writing by
672 * allowing the cached entry to simply be dumped to the output stream.
673 *
674 * Default setting: {@value #DEFAULT_DELTA_CACHE_SIZE}
675 *
676 * @param size
677 * number of bytes to cache. Set to 0 to enable an infinite
678 * cache, set to 1 (an impossible size for any delta) to disable
679 * the cache.
680 */
681 public void setDeltaCacheSize(long size) {
682 deltaCacheSize = size;
683 }
684
685 /**
686 * Maximum size in bytes of a delta to cache.
687 *
688 * Default setting: {@value #DEFAULT_DELTA_CACHE_LIMIT}
689 *
690 * @return maximum size (in bytes) of a delta that should be cached.
691 */
692 public int getDeltaCacheLimit() {
693 return deltaCacheLimit;
694 }
695
696 /**
697 * Set the maximum size of a delta that should be cached.
698 *
699 * During delta search, any delta smaller than this size will be cached, up
700 * to the {@link #getDeltaCacheSize()} maximum limit. This speeds up writing
701 * by allowing these cached deltas to be output as-is.
702 *
703 * Default setting: {@value #DEFAULT_DELTA_CACHE_LIMIT}
704 *
705 * @param size
706 * maximum size (in bytes) of a delta to be cached.
707 */
708 public void setDeltaCacheLimit(int size) {
709 deltaCacheLimit = size;
710 }
711
712 /**
713 * Get the maximum file size that will be delta compressed.
714 *
715 * Files bigger than this setting will not be delta compressed, as they are
716 * more than likely already highly compressed binary data files that do not
717 * delta compress well, such as MPEG videos.
718 *
719 * Default setting: {@value #DEFAULT_BIG_FILE_THRESHOLD}
720 *
721 * @return the configured big file threshold.
722 */
723 public int getBigFileThreshold() {
724 return bigFileThreshold;
725 }
726
727 /**
728 * Set the maximum file size that should be considered for deltas.
729 *
730 * Default setting: {@value #DEFAULT_BIG_FILE_THRESHOLD}
731 *
732 * @param bigFileThreshold
733 * the limit, in bytes.
734 */
735 public void setBigFileThreshold(int bigFileThreshold) {
736 this.bigFileThreshold = bigFileThreshold;
737 }
738
739 /**
740 * Get the compression level applied to objects in the pack.
741 *
742 * Default setting: {@value java.util.zip.Deflater#DEFAULT_COMPRESSION}
743 *
744 * @return current compression level, see {@link java.util.zip.Deflater}.
745 */
746 public int getCompressionLevel() {
747 return compressionLevel;
748 }
749
750 /**
751 * Set the compression level applied to objects in the pack.
752 *
753 * Default setting: {@value java.util.zip.Deflater#DEFAULT_COMPRESSION}
754 *
755 * @param level
756 * compression level, must be a valid level recognized by the
757 * {@link java.util.zip.Deflater} class.
758 */
759 public void setCompressionLevel(int level) {
760 compressionLevel = level;
761 }
762
763 /**
764 * Get the number of threads used during delta compression.
765 *
766 * Default setting: 0 (auto-detect processors)
767 *
768 * @return number of threads used for delta compression. 0 will auto-detect
769 * the threads to the number of available processors.
770 */
771 public int getThreads() {
772 return threads;
773 }
774
775 /**
776 * Set the number of threads to use for delta compression.
777 *
778 * During delta compression, if there are enough objects to be considered
779 * the writer will start up concurrent threads and allow them to compress
780 * different sections of the repository concurrently.
781 *
782 * An application thread pool can be set by {@link #setExecutor(Executor)}.
783 * If not set a temporary pool will be created by the writer, and torn down
784 * automatically when compression is over.
785 *
786 * Default setting: 0 (auto-detect processors)
787 *
788 * @param threads
789 * number of threads to use. If <= 0 the number of available
790 * processors for this JVM is used.
791 */
792 public void setThreads(int threads) {
793 this.threads = threads;
794 }
795
796 /**
797 * Get the preferred thread pool to execute delta search on.
798 *
799 * @return the preferred thread pool to execute delta search on.
800 */
801 public Executor getExecutor() {
802 return executor;
803 }
804
805 /**
806 * Set the executor to use when using threads.
807 *
808 * During delta compression if the executor is non-null jobs will be queued
809 * up on it to perform delta compression in parallel. Aside from setting the
810 * executor, the caller must set {@link #setThreads(int)} to enable threaded
811 * delta search.
812 *
813 * @param executor
814 * executor to use for threads. Set to null to create a temporary
815 * executor just for the writer.
816 */
817 public void setExecutor(Executor executor) {
818 this.executor = executor;
819 }
820
821 /**
822 * Get the pack index file format version this instance creates.
823 *
824 * Default setting: {@value #DEFAULT_INDEX_VERSION}
825 *
826 * @return the index version, the special version 0 designates the oldest
827 * (most compatible) format available for the objects.
828 * @see PackIndexWriter
829 */
830 public int getIndexVersion() {
831 return indexVersion;
832 }
833
834 /**
835 * Set the pack index file format version this instance will create.
836 *
837 * Default setting: {@value #DEFAULT_INDEX_VERSION}
838 *
839 * @param version
840 * the version to write. The special version 0 designates the
841 * oldest (most compatible) format available for the objects.
842 * @see PackIndexWriter
843 */
844 public void setIndexVersion(int version) {
845 indexVersion = version;
846 }
847
848 /**
849 * True if writer is allowed to build bitmaps for indexes.
850 *
851 * Default setting: {@value #DEFAULT_BUILD_BITMAPS}
852 *
853 * @return true if delta base is the writer can choose to output an index
854 * with bitmaps.
855 * @since 3.0
856 */
857 public boolean isBuildBitmaps() {
858 return buildBitmaps;
859 }
860
861 /**
862 * Set writer to allow building bitmaps for supported pack files.
863 *
864 * Index files can include bitmaps to speed up future ObjectWalks.
865 *
866 * Default setting: {@value #DEFAULT_BUILD_BITMAPS}
867 *
868 * @param buildBitmaps
869 * boolean indicating whether bitmaps may be included in the
870 * index.
871 * @since 3.0
872 */
873 public void setBuildBitmaps(boolean buildBitmaps) {
874 this.buildBitmaps = buildBitmaps;
875 }
876
877 /**
878 * Get the count of most recent commits for which to build bitmaps.
879 *
880 * Default setting: {@value #DEFAULT_BITMAP_CONTIGUOUS_COMMIT_COUNT}
881 *
882 * @return the count of most recent commits for which to build bitmaps
883 * @since 4.2
884 */
885 public int getBitmapContiguousCommitCount() {
886 return bitmapContiguousCommitCount;
887 }
888
889 /**
890 * Set the count of most recent commits for which to build bitmaps.
891 *
892 * Default setting: {@value #DEFAULT_BITMAP_CONTIGUOUS_COMMIT_COUNT}
893 *
894 * @param count
895 * the count of most recent commits for which to build bitmaps
896 * @since 4.2
897 */
898 public void setBitmapContiguousCommitCount(int count) {
899 bitmapContiguousCommitCount = count;
900 }
901
902 /**
903 * Get the count at which to switch from "bitmapRecentCommitSpan" to
904 * "bitmapDistantCommitSpan".
905 *
906 * Default setting: {@value #DEFAULT_BITMAP_RECENT_COMMIT_COUNT}
907 *
908 * @return the count for switching between recent and distant spans
909 * @since 4.2
910 */
911 public int getBitmapRecentCommitCount() {
912 return bitmapRecentCommitCount;
913 }
914
915 /**
916 * Set the count at which to switch from "bitmapRecentCommitSpan" to
917 * "bitmapDistantCommitSpan".
918 *
919 * Default setting: {@value #DEFAULT_BITMAP_RECENT_COMMIT_COUNT}
920 *
921 * @param count
922 * the count for switching between recent and distant spans
923 * @since 4.2
924 */
925 public void setBitmapRecentCommitCount(int count) {
926 bitmapRecentCommitCount = count;
927 }
928
929 /**
930 * Get the span of commits when building bitmaps for recent history.
931 *
932 * Default setting: {@value #DEFAULT_BITMAP_RECENT_COMMIT_SPAN}
933 *
934 * @return the span of commits when building bitmaps for recent history
935 * @since 4.2
936 */
937 public int getBitmapRecentCommitSpan() {
938 return bitmapRecentCommitSpan;
939 }
940
941 /**
942 * Set the span of commits when building bitmaps for recent history.
943 *
944 * Default setting: {@value #DEFAULT_BITMAP_RECENT_COMMIT_SPAN}
945 *
946 * @param span
947 * the span of commits when building bitmaps for recent history
948 * @since 4.2
949 */
950 public void setBitmapRecentCommitSpan(int span) {
951 bitmapRecentCommitSpan = span;
952 }
953
954 /**
955 * Get the span of commits when building bitmaps for distant history.
956 *
957 * Default setting: {@value #DEFAULT_BITMAP_DISTANT_COMMIT_SPAN}
958 *
959 * @return the span of commits when building bitmaps for distant history
960 * @since 4.2
961 */
962 public int getBitmapDistantCommitSpan() {
963 return bitmapDistantCommitSpan;
964 }
965
966 /**
967 * Set the span of commits when building bitmaps for distant history.
968 *
969 * Default setting: {@value #DEFAULT_BITMAP_DISTANT_COMMIT_SPAN}
970 *
971 * @param span
972 * the span of commits when building bitmaps for distant history
973 * @since 4.2
974 */
975 public void setBitmapDistantCommitSpan(int span) {
976 bitmapDistantCommitSpan = span;
977 }
978
979 /**
980 * Get the count of branches deemed "excessive". If the count of branches in
981 * a repository exceeds this number and bitmaps are enabled, "inactive"
982 * branches will have fewer bitmaps than "active" branches.
983 *
984 * Default setting: {@value #DEFAULT_BITMAP_EXCESSIVE_BRANCH_COUNT}
985 *
986 * @return the count of branches deemed "excessive"
987 * @since 4.2
988 */
989 public int getBitmapExcessiveBranchCount() {
990 return bitmapExcessiveBranchCount;
991 }
992
993 /**
994 * Set the count of branches deemed "excessive". If the count of branches in
995 * a repository exceeds this number and bitmaps are enabled, "inactive"
996 * branches will have fewer bitmaps than "active" branches.
997 *
998 * Default setting: {@value #DEFAULT_BITMAP_EXCESSIVE_BRANCH_COUNT}
999 *
1000 * @param count
1001 * the count of branches deemed "excessive"
1002 * @since 4.2
1003 */
1004 public void setBitmapExcessiveBranchCount(int count) {
1005 bitmapExcessiveBranchCount = count;
1006 }
1007
1008 /**
1009 * Get the age in days that marks a branch as "inactive".
1010 *
1011 * Default setting: {@value #DEFAULT_BITMAP_INACTIVE_BRANCH_AGE_IN_DAYS}
1012 *
1013 * @return the age in days that marks a branch as "inactive"
1014 * @since 4.2
1015 */
1016 public int getBitmapInactiveBranchAgeInDays() {
1017 return bitmapInactiveBranchAgeInDays;
1018 }
1019
1020 /**
1021 * Set the age in days that marks a branch as "inactive".
1022 *
1023 * Default setting: {@value #DEFAULT_BITMAP_INACTIVE_BRANCH_AGE_IN_DAYS}
1024 *
1025 * @param ageInDays
1026 * the age in days that marks a branch as "inactive"
1027 * @since 4.2
1028 */
1029 public void setBitmapInactiveBranchAgeInDays(int ageInDays) {
1030 bitmapInactiveBranchAgeInDays = ageInDays;
1031 }
1032
1033 /**
1034 * Update properties by setting fields from the configuration.
1035 *
1036 * If a property's corresponding variable is not defined in the supplied
1037 * configuration, then it is left unmodified.
1038 *
1039 * @param rc
1040 * configuration to read properties from.
1041 */
1042 public void fromConfig(Config rc) {
1043 setMaxDeltaDepth(rc.getInt("pack", "depth", getMaxDeltaDepth())); //$NON-NLS-1$ //$NON-NLS-2$
1044 setDeltaSearchWindowSize(rc.getInt(
1045 "pack", "window", getDeltaSearchWindowSize())); //$NON-NLS-1$ //$NON-NLS-2$
1046 setDeltaSearchMemoryLimit(rc.getLong(
1047 "pack", "windowmemory", getDeltaSearchMemoryLimit())); //$NON-NLS-1$ //$NON-NLS-2$
1048 setDeltaCacheSize(rc.getLong(
1049 "pack", "deltacachesize", getDeltaCacheSize())); //$NON-NLS-1$ //$NON-NLS-2$
1050 setDeltaCacheLimit(rc.getInt(
1051 "pack", "deltacachelimit", getDeltaCacheLimit())); //$NON-NLS-1$ //$NON-NLS-2$
1052 setCompressionLevel(rc.getInt("pack", "compression", //$NON-NLS-1$ //$NON-NLS-2$
1053 rc.getInt("core", "compression", getCompressionLevel()))); //$NON-NLS-1$ //$NON-NLS-2$
1054 setIndexVersion(rc.getInt("pack", "indexversion", getIndexVersion())); //$NON-NLS-1$ //$NON-NLS-2$
1055 setBigFileThreshold(rc.getInt(
1056 "core", "bigfilethreshold", getBigFileThreshold())); //$NON-NLS-1$ //$NON-NLS-2$
1057 setThreads(rc.getInt("pack", "threads", getThreads())); //$NON-NLS-1$ //$NON-NLS-2$
1058
1059 // These variables aren't standardized
1060 //
1061 setReuseDeltas(rc.getBoolean("pack", "reusedeltas", isReuseDeltas())); //$NON-NLS-1$ //$NON-NLS-2$
1062 setReuseObjects(
1063 rc.getBoolean("pack", "reuseobjects", isReuseObjects())); //$NON-NLS-1$ //$NON-NLS-2$
1064 setDeltaCompress(
1065 rc.getBoolean("pack", "deltacompression", isDeltaCompress())); //$NON-NLS-1$ //$NON-NLS-2$
1066 setCutDeltaChains(
1067 rc.getBoolean("pack", "cutdeltachains", getCutDeltaChains())); //$NON-NLS-1$ //$NON-NLS-2$
1068 setSinglePack(
1069 rc.getBoolean("pack", "singlepack", getSinglePack())); //$NON-NLS-1$ //$NON-NLS-2$
1070 setBuildBitmaps(
1071 rc.getBoolean("pack", "buildbitmaps", isBuildBitmaps())); //$NON-NLS-1$ //$NON-NLS-2$
1072 setBitmapContiguousCommitCount(
1073 rc.getInt("pack", "bitmapcontiguouscommitcount", //$NON-NLS-1$ //$NON-NLS-2$
1074 getBitmapContiguousCommitCount()));
1075 setBitmapRecentCommitCount(rc.getInt("pack", "bitmaprecentcommitcount", //$NON-NLS-1$ //$NON-NLS-2$
1076 getBitmapRecentCommitCount()));
1077 setBitmapRecentCommitSpan(rc.getInt("pack", "bitmaprecentcommitspan", //$NON-NLS-1$ //$NON-NLS-2$
1078 getBitmapRecentCommitSpan()));
1079 setBitmapDistantCommitSpan(rc.getInt("pack", "bitmapdistantcommitspan", //$NON-NLS-1$ //$NON-NLS-2$
1080 getBitmapDistantCommitSpan()));
1081 setBitmapExcessiveBranchCount(rc.getInt("pack", //$NON-NLS-1$
1082 "bitmapexcessivebranchcount", getBitmapExcessiveBranchCount())); //$NON-NLS-1$
1083 setBitmapInactiveBranchAgeInDays(
1084 rc.getInt("pack", "bitmapinactivebranchageindays", //$NON-NLS-1$ //$NON-NLS-2$
1085 getBitmapInactiveBranchAgeInDays()));
1086 }
1087
1088 /** {@inheritDoc} */
1089 @Override
1090 public String toString() {
1091 final StringBuilder b = new StringBuilder();
1092 b.append("maxDeltaDepth=").append(getMaxDeltaDepth()); //$NON-NLS-1$
1093 b.append(", deltaSearchWindowSize=").append(getDeltaSearchWindowSize()); //$NON-NLS-1$
1094 b.append(", deltaSearchMemoryLimit=") //$NON-NLS-1$
1095 .append(getDeltaSearchMemoryLimit());
1096 b.append(", deltaCacheSize=").append(getDeltaCacheSize()); //$NON-NLS-1$
1097 b.append(", deltaCacheLimit=").append(getDeltaCacheLimit()); //$NON-NLS-1$
1098 b.append(", compressionLevel=").append(getCompressionLevel()); //$NON-NLS-1$
1099 b.append(", indexVersion=").append(getIndexVersion()); //$NON-NLS-1$
1100 b.append(", bigFileThreshold=").append(getBigFileThreshold()); //$NON-NLS-1$
1101 b.append(", threads=").append(getThreads()); //$NON-NLS-1$
1102 b.append(", reuseDeltas=").append(isReuseDeltas()); //$NON-NLS-1$
1103 b.append(", reuseObjects=").append(isReuseObjects()); //$NON-NLS-1$
1104 b.append(", deltaCompress=").append(isDeltaCompress()); //$NON-NLS-1$
1105 b.append(", buildBitmaps=").append(isBuildBitmaps()); //$NON-NLS-1$
1106 b.append(", bitmapContiguousCommitCount=") //$NON-NLS-1$
1107 .append(getBitmapContiguousCommitCount());
1108 b.append(", bitmapRecentCommitCount=") //$NON-NLS-1$
1109 .append(getBitmapRecentCommitCount());
1110 b.append(", bitmapRecentCommitSpan=") //$NON-NLS-1$
1111 .append(getBitmapRecentCommitSpan());
1112 b.append(", bitmapDistantCommitSpan=") //$NON-NLS-1$
1113 .append(getBitmapDistantCommitSpan());
1114 b.append(", bitmapExcessiveBranchCount=") //$NON-NLS-1$
1115 .append(getBitmapExcessiveBranchCount());
1116 b.append(", bitmapInactiveBranchAge=") //$NON-NLS-1$
1117 .append(getBitmapInactiveBranchAgeInDays());
1118 b.append(", singlePack=").append(getSinglePack()); //$NON-NLS-1$
1119 return b.toString();
1120 }
1121 }