Commit graph

7 commits

Author SHA1 Message Date
Nick Alexander
513f23c45c Process <transact! in a transaction; add hook for processing :db.part/db changes. 2016-07-25 10:41:35 -07:00
Nick Alexander
bf080ced3c Part 2: Add ISQLiteConnectionFactory and CLJC test that uses it. 2016-07-13 18:19:22 -07:00
Nick Alexander
900e77862e Implement database on top of SQLite connection. r=rnewman
We would prefer to talk about a knowledge base on top of a database, but
all the Datomic and DataScript code (and symbols, like :db/add, etc)
refer to the "database of datoms", so let's roll with that nomenclature
and try to be specific that the persistent storage-layer is SQLite.
This will become more clear when we actually use SQLite's unique
capabilities for text indexing.
2016-07-13 12:37:23 -07:00
Richard Newman
db68a714f6 First pass at translating Datalog queries into SQL. r=nalexander
Signed-off-by: Richard Newman <rnewman@twinql.com>
2016-07-13 09:51:42 -07:00
Nick Alexander
724c37466d Add an SQLite connection abstraction. 2016-07-12 13:56:26 -07:00
Nick Alexander
0a312b4f40 Add an async and async testing framework.
This is a well-worn idea: use a `promise-channel` of `[result nil]` or
`[nil error]` pairs.  The `go-pair` and `<?` macros handle catching
exceptions (important, given that synchronous CLJ code expects to throw
rather than return an error promise or similar), allowing code like:
```
(go-pair
  (let [result (<? (pair-chan-fn))]
    (when (not result)
      (throw (Exception. "No result!")))
    (transform result)))
```
to be expressed naturally.  These are the equivalents of `async` and
`await` in JS.

The implementation is complicated by significant incompatibilities
between CLJ and CLJS.  The solution presented here takes care to
separate the macro definitions into CLJ.  Sadly, this requires
namespacing the per-environment symbols explicitly; but we hope to
minimize such code in files like this.

The most significant restriction to this approach is that consumers must
require the transitive dependencies of the macro-defining modules.  See
the included tests (both CLJ and CLJS) for the appropriate
incantations (for pair-chan, core.async, and test).
2016-07-12 13:56:26 -07:00
Nick Alexander
08f7084d92 Add lein-doo to run ClojureScript tests. 2016-07-06 16:42:40 -07:00