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SkunkDriver.scala
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SkunkDriver.scala
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/*
* Copyright 2021 Hossein Naderi
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package edomata.skunk
import _root_.skunk.Session
import cats.effect.kernel.Async
import cats.effect.kernel.Resource
import cats.implicits.*
import edomata.backend.PGNamespace
import edomata.backend.eventsourcing.*
import edomata.core.*
final class SkunkDriver[F[_]: Async] private (
namespace: PGNamespace,
pool: Resource[F, Session[F]]
) extends StorageDriver[F, BackendCodec] {
def build[S, E, R, N](
snapshot: SnapshotStore[F, S]
)(using
model: ModelTC[S, E, R],
event: BackendCodec[E],
notifs: BackendCodec[N]
): Resource[F, Storage[F, S, E, R, N]] = {
def setup = {
val jQ = Queries.Journal(namespace, event)
val nQ = Queries.Outbox(namespace, notifs)
val cQ = Queries.Commands(namespace)
pool
.use(s =>
s.execute(jQ.setup) >> s.execute(nQ.setup) >> s.execute(cQ.setup)
)
.as((jQ, nQ, cQ))
}
Resource
.eval(setup)
.flatMap((jQ, nQ, cQ) =>
for {
updates <- Resource.eval(Notifications[F])
_outbox = SkunkOutboxReader(pool, nQ)
_journal = SkunkJournalReader(pool, jQ)
_repo = RepositoryReader(_journal, snapshot)
skRepo = SkunkRepository(pool, jQ, nQ, cQ, _repo, updates)
} yield Storage(skRepo, _repo, _journal, _outbox, updates)
)
}
def snapshot[S](using
BackendCodec[S]
): Resource[F, SnapshotPersistence[F, S]] =
Resource.eval(SkunkSnapshotPersistence(pool, namespace))
}
object SkunkDriver {
inline def apply[F[_]: Async](
inline namespace: String,
pool: Resource[F, Session[F]]
): F[SkunkDriver[F]] = from(PGNamespace(namespace), pool)
def from[F[_]: Async](
namespace: PGNamespace,
pool: Resource[F, Session[F]]
): F[SkunkDriver[F]] =
pool
.use(_.execute(Queries.setupSchema(namespace)))
.as(new SkunkDriver(namespace, pool))
}