Reftable is a binary, block-based storage format for the ref-database.
It provides several advantages over the traditional packed + loose
storage format:
* O(1) write performance, even for deletions and transactions.
* atomic updates to the ref database.
* O(log N) lookup and prefix scans
* free from restrictions imposed by the file system: it is
case-sensitive even on case-insensitive file systems, and has
no inherent limitations for directory/file conflicts
* prefix compression reduces space usage for repetitive ref names,
such as gerrit's refs/changes/xx/xxxxx format.
FileReftableDatabase is based on FileReftableStack, which does
compactions inline. This is simple, and has good median performance,
but every so often it will rewrite the entire ref database.
For testing, a FileReftableTest (mirroring RefUpdateTest) is added to
check for Reftable specific behavior. This must be done separately, as
reflogs have different semantics.
Add a reftable flavor of BatchRefUpdateTest.
Add a FileReftableStackTest to exercise compaction.
Add FileRepository#convertToReftable so existing testdata can be
reused.
CQ: 21007
Change-Id: I1837f268e91c6b446cb0155061727dbaccb714b8
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
[WARNING] Some problems were encountered while building the effective
model for org.eclipse.jgit:org.eclipse.jgit.benchmarks:jar:5.6.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for
org.apache.maven.plugins:maven-shade-plugin is missing. @ line 131,
column 15
Change-Id: Id25916c460bc4a10d0f797779d24f53292df2b77
Signed-off-by: Michael Keppler <Michael.Keppler@gmx.de>
Building the jgit aggregator with Maven leads to a compiler level 1.6
for me, thereby failing the build. Multiple profiles specify
source/target level separately, but there seems no global setting.
Adding the global properties makes the jgit aggregator compile on my
system.
Change-Id: Ia5613cc0fcf6085265a9e48f940e5a7d3f998608
Signed-off-by: Michael Keppler <Michael.Keppler@gmx.de>
Several methods were protected when they were defined in BaseReceivePack
which has since been squashed into ReceivePack. Those methods no longer
need to be protected, and can now be private instead.
Change-Id: Ic6bb5e66f353fcbdc7919847423234af398c88b4
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Prevent adding a null parent to a commit's parent array. Doing so
can cause NPEs later on.
Bug: 552160
Change-Id: Ib24b7b9b7b08e0b6f246006b4a4cade7eeb830b9
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
core.quotePath = false means that "bytes higher than 0x80 are not
considered "unusal" anymore"[1], i.e., they are not escaped. In
essence this preserves non-ASCII characters in path names in output.
Note that control characters and other special characters in the
ASCII range will still be escaped.
Add a new QuotedString.GIT_PATH_MINIMAL singleton implementing this.
Change the normal GIT_PATH algorithm to use bytes instead of characters
so it can be re-used. Provide a setter in DiffFormatter for the quoting
style so that an application can override the default, which is the
setting from the git config (and by default "true"). Use the new
QuotedString.GIT_PATH_MINIMAL when core.quotePath == false.
[1] https://git-scm.com/docs/git-config#Documentation/git-config.txt-corequotePath
Bug: 552467
Change-Id: Ifcb233e7d10676333bf42011e32d01a4e1138059
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Some applications using JGit use their own repository caching. In
such applications, it may be needlessly inefficient to create new
submodule repositories from a SubmoduleWalk or in an IndexDiff. It
can be much more efficient to use an already cached repository
instance.
Provide a way to configure a SubmoduleWalk with a factory to create
BaseRepositoryBuilders to use to create repositories, and use it in
IndexDiff. Provide new IndexDiff.diff() operations that take such an
additional factory as parameter.
An application that caches Repository instances (for instance EGit)
can use a factory that provides builders that don't create a new
Repository instance but that return the already cached instance, if
one is available. Note that in such a case, the application may need
to be prepared to deal with IndexDiff.diff() also _closing_ the
obtained repository; if the application expects its cached Repository
instances to remain open while being cached, it'll have to use
Repository.incrementOpen() to prevent that the repository instance
gets closed.
Bug: 550878
Change-Id: Icc1b34dfc4cebd8ed4739dd09d37744d41adf711
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
IndexDiff would apply ignore mode ALL from .gitmodules to all remaining
submodules, and would ignore other settings from .gitignore and always
apply the setting defined on the IndexDiff instead. Correct that.
In canonical git the ignore setting from .gitmodules can also be
overridden by .git/config.[1] Implement that override in SubmoduleWalk.
[1] https://git-scm.com/docs/gitmodules#Documentation/gitmodules.txt-submoduleltnamegtignore
Bug: 521613
Change-Id: I9199fd447e41c7838924856dce40678370b66395
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
I1ce92869435d5eebb7d671be44561e69c6233134 merged BaseReceivePack into
ReceivePack which breaks API but is only affecting the few jgit based
servers out in the wild.
Change-Id: Iad856a2afaf3cad95d01ad81a0116cebcd9de2d9
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Move the BaseReceivePack implementation back into ReceivePack. This is a
backward-incompatible change. For example, BaseReceivePack.FirstLine no
longer exists and cannot be referenced. However, most of the code
should just work by replacing BaseReceivePack with ReceivePack.
Although this is an API change, it only affects callers using JGit as a
server, and there are very few of those in the wild.
Change-Id: I1ce92869435d5eebb7d671be44561e69c6233134
Signed-off-by: Masaya Suzuki <masayasuzuki@google.com>
This will provide exponential backoff with jitter to other JGit
components too.
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Change-Id: Idd44e3bbaef6d71134ce2e3f7d405f35e7397cbd
The getPackSize method will throw IllegalStateException if it is
called when the pack size is not set. This is the case for example
when the received commands are all DELETE and there is no pack.
Add a new method hasReceivedPack that can be called prior to calling
getPackSize, to avoid causing the IllegalStateException.
See [1] for context.
[1] https://bugs.chromium.org/p/gerrit/issues/detail?id=11918
Change-Id: I56397256a05e92c8398e65c07a859cee59b46317
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
* stable-5.5:
Fix NPE in SystemReader in tests
Change-Id: I8500caeca99fe05ce9a80b54330b72e23670a46b
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
SystemReader.updateAll() must _not_ test whether the file exists. In
tests at least there are FileBasedConfigs with a null file. Test
configs should (and do) override isOutdated() to deal with this case.
Change-Id: I56303fe0d56afeb9f2203ee807a92c5dcf3809e9
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
* stable-5.5:
BaseReceivePack: Fix the format
Prepend hostname to subsection used to store file timestamp resolution
Store filesystem timestamp resolution in extra jgit config
SystemReader: extract updating config and its parents if outdated
Change-Id: Iecfddce8081303af29badcdcd3d72a0da50c964f
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
This ensures the measured filesystem timestamp resolution will be only
used on the machine where it was measured and avoid errors in case the
~/.jgitconfig file is copied to another machine.
Bug: 551850
Change-Id: Iff2a11be62ca94c3bbe4a955182988dc50852f9f
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
This avoids polluting hand-crafted user level config with
auto-configured options which might disturb in environments where
the user level config is replicated between different machines.
Add a jgit config as parent of the system level config. Persist
measured timestamp resolutions always in this jgit config and read it
via the user global config. This has the effect that auto-configured
timestamp resolution will be used by default and can be overridden in
either the system level or user level config.
Store the jgit config under the XDG_CONFIG_HOME directory following the
XDG base directory specification [1] in order to ensure that we have
write permissions to persist the file. This has the effect that each OS
user will use its jgit config since they typically use different
XDG_CONFIG_HOME directories.
If the environment variable XDG_CONFIG_HOME is defined the jgit config
file is located at $XDG_CONFIG_HOME/jgit/config otherwise the default is
~/.config/jgit/config.
If you want to avoid redundant measurement for different OS users
manually copy the values measured and auto-configured for one OS user to
the system level git config.
[1] https://wiki.archlinux.org/index.php/XDG_Base_Directory
Bug: 551850
Change-Id: I0022bd40ae62f82e5b964c2ea25822eb55d94687
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
The recent versions fixed number of defects and added new features: [1].
Use Orbit I20191106190530 until a S-build is available.
[1] https://www.bouncycastle.org/releasenotes.html
Change-Id: I0f2fd3a218ea31f6f6b58b1816af9361e4de54e4
Signed-off-by: David Ostrovsky <d.ostrovsky@gmx.de>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Change-Id: Ia77f442e47c5670c2d6d279ba862044016aabd86
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* stable-5.5:
Run JMH benchmarks using bazel
Benchmark for creating files and FileSnapshots
Implement benchmark for looking up FileStore of a given Path
JMH benchmark for SimpleLruCache
Update API problem filters
Remove unused API problem filters
Silence API errors for new API added since 5.1.0
Change-Id: If87a13d0f809d9968ad2921b786f4b18e1b494d0
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* stable-5.4:
Run JMH benchmarks using bazel
Benchmark for creating files and FileSnapshots
Implement benchmark for looking up FileStore of a given Path
JMH benchmark for SimpleLruCache
Update API problem filters
Remove unused API problem filters
Silence API errors for new API added since 5.1.0
Change-Id: I071536d630a95e89f5bbbf965a1571b9f5eb81ee
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* stable-5.3:
Run JMH benchmarks using bazel
Benchmark for creating files and FileSnapshots
Implement benchmark for looking up FileStore of a given Path
JMH benchmark for SimpleLruCache
Update API problem filters
Remove unused API problem filters
Silence API errors for new API added since 5.1.0
Change-Id: Ib735c4039e24ec8b045ae2cc81df1e9e5c9fa996
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* stable-5.2:
Run JMH benchmarks using bazel
Benchmark for creating files and FileSnapshots
Implement benchmark for looking up FileStore of a given Path
JMH benchmark for SimpleLruCache
Update API problem filters
Remove unused API problem filters
Silence API errors for new API added since 5.1.0
Change-Id: I00615958ab6fbdff601e87a9792aba5606cda12a
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* stable-5.1:
Run JMH benchmarks using bazel
Benchmark for creating files and FileSnapshots
Implement benchmark for looking up FileStore of a given Path
JMH benchmark for SimpleLruCache
Remove unused API problem filters
Silence API errors for new API added since 5.1.0
Change-Id: If91c55a192d3b2c441d9c8d414f2e24a7261b1b6
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
The benchmarks can be built and run using bazel by running:
$ bazel run //org.eclipse.jgit.benchmarks:benchmarks
Change-Id: I6679750eaa0f2be30ed9d45036e013b0ea4fcc86
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Results on Mac OS 10.14.6 using APFS:
Result "org.eclipse.jgit.benchmarks.LookupFileStoreBenchmark.testLookupFileStore":
44583.277 ±(99.9%) 2666.096 ns/op [Average]
(min, avg, max) = (43707.073, 44583.277, 45320.685), stdev = 692.377
CI (99.9%): [41917.181, 47249.373] (assumes normal distribution)
Secondary result
"org.eclipse.jgit.benchmarks.LookupFileStoreBenchmark.testLookupFileStore:·stack":
Stack profiler:
....[Thread state
distributions]........................................................
100.0% RUNNABLE
....[Thread state:
RUNNABLE].............................................................
42.5% 42.5% sun.nio.fs.UnixNativeDispatcher.realpath0
37.9% 37.9% sun.nio.fs.UnixNativeDispatcher.stat0
11.0% 11.0% sun.nio.fs.BsdNativeDispatcher.getfsstat
7.6% 7.6% sun.nio.fs.BsdNativeDispatcher.fsstatEntry
0.7% 0.7% sun.nio.fs.BsdNativeDispatcher.endfsstat
0.1% 0.1% sun.nio.fs.UnixPath.initOffsets
0.0% 0.0% sun.nio.fs.UnixFileAttributes.get
0.0% 0.0% java.util.zip.Inflater.inflateBytes
0.0% 0.0% sun.misc.Unsafe.compareAndSwapInt
0.0% 0.0% sun.nio.fs.BsdFileStore.findMountEntry
This shows that FS.attrCacheByPath should be useful to reduce overhead
of looking up the FileStore of a given file.
Change-Id: I7213086b42e0453f0ee149660d507dac2a4644cc
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
See [1] for JMH documentation and [2] how to use JMH in Eclipse.
The benchmarks pom currently cannot use the JGit parent pom due to an
ecj bug [3] regarding annotation processing. Hence for now do not
inherit from the JGit parent pom and copy the compiler plugin
configuration for javac from the parent pom.
After running the Maven build the benchmark can be run using Maven:
$ java -jar org.eclipse.jgit.benchmarks/target/benchmarks.jar
or in Eclipse by running the main method of the SimpleLruCacheBenchmark
class.
[1] https://openjdk.java.net/projects/code-tools/jmh/
[2] http://alblue.bandlem.com/Page/3/index.html
[3] https://eclip.se/532029
CQ: 20517
CQ: 20518
Change-Id: Idca8a9e0980f0b8a9c741c4c9e97d03c62f07c8d
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
- filter errors for new APIs added in service release
- remove unused filters
Change-Id: Ifbf532b8a3c46d4ed78a38f6c75073a072b7f669
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Michael Keppler
Han-Wen Nienhuys
David Pursehouse
Matthias Sohn
Thomas Wolf
Jonathan Nieder
Masaya Suzuki
David Ostrovsky