Commit graph

148 commits

Author SHA1 Message Date
c162856a21 Update dependencies
regex: 0.2 -> 1
semver: 0.8 -> 0.9
walkdir: 1 -> 2
2018-10-06 12:21:20 +02:00
3d12998603 Update dependency: toml-query: 0.6 -> 0.7 2018-09-27 15:05:44 +02:00
0a7afee454 Update dependency: error-chain: 0.11 -> 0.12 2018-09-27 15:05:25 +02:00
d4872f6da3 Optimize the Store::entries() interface
The previous iterator was implemented to simply fetch _all_ pathes from
the filesystem, no matter what.

With this implementation, this changes. The iterator now has
functionality to optimize the iteration, if only a subdirectory of the
store is required, for example `$STORE/foo`.

This is done via functionality where the underlying iterator gets
altered.

First of all, the interface was changed to return a `Entries` object,
which itself only covers the libimagstore-internal `PathIterator` type.
This type was changed so that the backend implementation provides an
"PathIterBuilder`, which builds the actual iterator object for the
`PathIterator` type.

The intermediate `StoreIdConstructingIterator` was merged into
`PathIterator` for simplicity.

The `Entries` type got functionality similar to the
`StoreIdIteratorWithStore` type for easier transition to the new API.
This should probably be removed at a later point, though.

As the `walkdir::WalkDir` type is not as nice as it could be, iterators
for two collections in the store could be built like this (untested):

    store
        .entries()?
        .in_collection("foo")
        .chain(store.entries()?.in_collection("bar"))

Functionality to exclude subdirectories is not possible with the current
`walkdir::WalkDir` implementation and has to be done during iteration,
with filtering (as usual).

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
2018-09-27 12:19:18 +02:00
d59dca1a23 Add StoreIdIterator::with_store() 2018-09-27 12:19:18 +02:00
8b508fe4c3 Optimize backend impl to not hold open files
This patch changes the filesystem-backend implementation of libimagstore
to open files on each read/write rather than holding the file handle in
memory at all times.

Whenever a lot of imag store entries are read into memory, the imag
process may ran out of file descriptors. With this patch applied, a
`Store::get()` call on an entry which is not yet in the store cache
would cause the file to be read, but the FD being dropped after that.
Likewise, a `Store::update()` (which is also called if the imag entry is
dropped) would re-open the file on the filesystem and write the contents
from the imag store cache back to the file.

With this patch, opening hundrets or thousands of imag entries should be
no problem anymore, only the available memory should be a limit then.

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
2018-08-11 17:50:22 +02:00
aff6ff105d Remove "Header" extension for Value type 2018-07-19 20:58:27 +02:00
f6a7345b4a Simplify: Move header verification from Value extension to Entry type 2018-07-19 20:58:27 +02:00
9ad1c8d6bd Simplify: Move default header generation from Value extension to Entry type 2018-07-19 20:58:27 +02:00
1705ecbbff Fix: Remove (empty) Drop implementation for Store
The StoreEntry drop implementation takes care of unlocking the files.
2018-07-19 20:58:27 +02:00
b774ac0e67 Fix: Deleting an Entry could leave artifacts in cache
This patch fixes a bug we did not even hit (yet). It is: When deleting
an Entry from the store, this could potentially leave artifacts in the
cache.

Szenario: An Entry, which was loaded (via `Store::get()` for example),
gets `Store::delete()`ed twice. The first call would work as expected,
but leave the Entry in the Store cache. The second call would then fail,
as the Entry is already removed on the FS, but still in the cache. This
would fail - which is the right thing to do here - but with the wrong
error (with a FileError rather than a FileNotFound error).

This patch fixes this.

First of all, the appropriate `PathBuf` object is calculated in all
cases, as this object is needed to check whether the file is actually
there (which could be the case if the Entry is in the cache and if it is
not).

If the entry is in the cache and is borrowed: error. If not, remove the
entry from the cache. Afterwards the file is deleted on disk.

If the entry is not in the cache, but the file exists, the file is removed.
If the file does not exist: error.

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
2018-07-19 20:58:27 +02:00
9315a23754 Fix: Use backend abstraction for checking whether a path exists 2018-07-19 20:58:27 +02:00
54c5854761 Remove unnecessary call 2018-06-23 21:56:03 +02:00
3bdd5c959b Add documentation to StoreId type 2018-06-23 21:56:03 +02:00
664edc7943 Update version string: 0.8.0 -> 0.9.0 2018-05-09 11:39:33 +02:00
eb20a9d881
Merge pull request #1477 from matthiasbeyer/libimagstore/remove-walk
Remove Store::walk()
2018-05-02 18:39:11 +02:00
258d9f90d3 Remove Store::walk()
This patch removes the Store::walk() interface.

It was cumbersome and unused anyways.
2018-05-02 17:46:45 +02:00
888b31377e Fix: Do not check whether path exists - check whether its a file
This fixes a bug introduced in 195d921218
where we didn't check whether the path is actually a file.
2018-05-02 14:04:59 +02:00
2bf09e7737 Only create directory if it does not exist 2018-05-01 22:29:46 +02:00
b27b392f4b Add trace output 2018-05-01 22:29:46 +02:00
972327e35e Remove Store::reset_backend() 2018-05-01 21:09:51 +02:00
2f0a557068 Fix for passing Arc<_> to store interface instead of Box<_> 2018-05-01 21:08:57 +02:00
42e2f18fb3 Pass around Arc<FileAbstraction> internally
Because the iterators need to be able to check whether the file exists
_in the backend_ (not on disk, but in the backend, because of in-memory
test for example), we need to be able to pass the backend to the
iterator intermediate type.

This patch implements this. It does so by changing the internal backend
member of the store from `Box<FileAbstraction>` to
`Arc<FileAbstraction>`, which gives us the ability to clone the
reference to the backend easily without needing to rely on lifetimes
here, because of the Arc.

Also, less boxes are always good.
2018-05-01 21:08:57 +02:00
d08c27e623 Rewrite StoreIdIterator extensions
This patch reimplements the iterator extensions.

As we iterate (in StoreIdIterator) over Result<StoreId> now anyways, we
don't need the extensions for Result iterators anymore.

This patch rewrites the extensions to be more simple in every way and
generic over the error type in the iterator.
All the errors have to do is implement From<StoreError>, which is what
they do when linking the generated error types with error_chain to the
libimagstore error types.
2018-05-01 17:44:01 +02:00
a2ff298e67 Rewrite Store::entries()
This patch rewrites the Store::entries() function to not be collecting
the iterator.

It therefore introduces a new, internal, iterator type which creates the
StoreId objects from the pathes the PathIterator yields internally.

With this patch, the Store iterator interface changes, as the iterators
now yield `Result<StoreId, StoreError>` instead of `StoreId`.
This is necessary, as the internal conversion errors shouldn't be
hidden.

Of course, the iterator types (like the StoreGetIterator and so on)
should hold a Result<StoreId> internally as well, and also yield
appropritely. This was changed in this commit, too.
2018-05-01 17:44:00 +02:00
f4556f3983 Rewrite backend to not collect on pathes_recursively() 2018-05-01 17:44:00 +02:00
900d9f0984
Merge pull request #1474 from matthiasbeyer/libimagstore/cache-flush
Add functionality to flush the internal cache
2018-04-30 21:07:37 +02:00
6a5bcb2709 Remove unused error kinds 2018-04-30 18:54:11 +02:00
6a40ac6b98 Add information about which storeid is the cause of the error in errors 2018-04-30 18:53:54 +02:00
860e47a256 Add functionality to flush the internal cache
Before we had the problem that when iterating over _a lot_ (like 5k)
entries and also fetching them, at some point the OS would return with
"Too many files open".

That is because the store internally caches a lot.

With this change, the Store gets an API to query how big the cache is,
how much the cache can currently hold and (and that's the main thing in
this patch) to flush the cache to disk.

A function to simply ask the store whether its cache should be flushed
(which would us require to ask the OS how many files we can open...
which would be possible with `libc::getrlimit`) does not yet exist,
though, but could be added easily if desired.
2018-04-30 18:39:59 +02:00
ea80a5a09b Derive Default for InMemoryFileAbstraction, remove constructor 2018-04-25 19:15:07 +02:00
6a34e7a8fd Derive Default for FSFileAbstraction, reduces boilerplate 2018-04-25 19:15:07 +02:00
bf363c4748 Use "if let" if matching on a single pattern 2018-04-25 19:15:07 +02:00
f1142c414d Use ok_or_else() instead of ok_or() 2018-04-25 19:15:07 +02:00
22170a0d55 Do not String::from(String) 2018-04-25 19:13:51 +02:00
6f5590713a Use single quotes here 2018-04-25 19:13:51 +02:00
44521a7c8c Dont use "return" keyword at end of function 2018-04-25 19:13:51 +02:00
dc18e650bb Collapse nested if-else-if 2018-04-25 19:13:51 +02:00
84249e3fb5 Be less verbose when constructing an object
The rust compiler does some fancy things for us: It automatically finds
the right fields if the name of the variable and the file is the same.

Lets use that to reduce boilerplate with this patch.
2018-04-25 19:13:50 +02:00
524c391ee0 Remove unused dependency 2018-04-24 22:16:40 +02:00
563c76c375 Remove "stdio" file abstraction from store implementation 2018-04-24 22:16:40 +02:00
19e0471f5b Remove tests with JsonMapper in backend 2018-04-24 22:16:40 +02:00
bae9188a08 Remove GlobStoreIdIterator helper iterator type 2018-04-24 13:40:42 +02:00
d70092d691 Remove: Store::retrieve_for_module 2018-04-24 13:40:42 +02:00
d2dceb6640 Update version numbers: 0.7.0 -> 0.8.0 2018-04-19 10:05:53 +02:00
4568b1f625
Merge pull request #1380 from matthiasbeyer/minor
Minor patches
2018-04-18 16:46:41 +02:00
98f8366e4c Fix documentation in crate metadata 2018-04-17 15:55:08 +02:00
604f350340 Add logging in store 2018-04-14 16:55:36 +02:00
a769186cd7 Make iterator lifetimes less restricting 2018-04-07 13:55:54 +02:00
e61ccc9561 Fix: Entry::to_str() should return Result<_>
Because serializing might fail.

Also fixes all usages of the API.
2018-03-26 14:24:42 +02:00