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annotate design.txt @ 10:382cfe9463db

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Dirstate parsing. DataAccess refactored to allow reuse and control over constants
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 25 Dec 2010 21:50:12 +0100
parents d6d2a630f4a6
children d46773d89a19
rev   line source
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a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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1 FileStructureWalker (pass HgFile, HgFolder to callable; which can ask for VCS data from any file)
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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2 External uses: user browses files, selects one and asks for its history
a3576694a4d1 Repository detection from local/specified directory
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3 Params: tip/revision;
a3576694a4d1 Repository detection from local/specified directory
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4 Implementation: manifest
a3576694a4d1 Repository detection from local/specified directory
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a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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6 Log --rev
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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7 Log <file>
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08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
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8 HgDataFile.history() or Changelog.history(file)?
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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11 Changelog.all() to return list with placeholder, not-parsed elements (i.e. read only compressedLen field and skip to next record), so that
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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12 total number of elements in the list is correct
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a3576694a4d1 Repository detection from local/specified directory
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a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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14 hg cat
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15 Implementation: logic to find file by name in the repository is the same with Log and other commands
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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17
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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18 Revlog
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aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
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19 What happens when big entry is added to a file - when it detects it can't longer fit into .i and needs .d? Inline flag and .i format changes?
aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
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20
aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
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21
aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
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22 ----------
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5abe5af181bd Ant script to build commands and run sample
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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23 + support patch from baseRev + few deltas (although done in a way patches are applied one by one instead of accumulated)
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aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
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24 + command-line samples (-R, filenames) (Log & Cat) to show on any repo
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5abe5af181bd Ant script to build commands and run sample
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
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25 +buildfile + run samples
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d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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26 *input stream impl + lifecycle. Step forward with FileChannel and ByteBuffer, although questionable accomplishment (looks bit complicated, cumbersome)
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aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
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27
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d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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28 calculate sha1 digest for file to see I can deal with nodeid
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aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
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29 delta merge
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5abe5af181bd Ant script to build commands and run sample
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
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30 Changeset to get index (local revision number)
5abe5af181bd Ant script to build commands and run sample
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
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d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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34 >>>> Effective file read/data access
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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35 ReadOperation, Revlog does: repo.getFileSystem().run(this.file, new ReadOperation(), long start=0, long end = -1)
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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36 ReadOperation gets buffer (of whatever size, as decided by FS impl), parses it and then reports if needs more data.
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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37 This helps to ensure streams are closed after reading, allows caching (if the same file (or LRU) is read few times in sequence)
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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38 and allows buffer management (i.e. reuse. Single buffer for all reads).
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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39 Scheduling multiple operations (in future, to deal with writes - single queue for FS operations - no locks?)
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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41 File access:
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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42 * NIO and mapped files - should be fast. Although seems to give less control on mem usage.
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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43 * Regular InputStreams and chunked stream on top - allocate List<byte[]>, each (but last) chunk of fixed size (depending on initial file size)
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
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45 <<<<<