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gossip.scala
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gossip.scala
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/*
* Copyright 2020 Scala EventStoreDB Client
*
* 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 sec
package api
import cats.syntax.all._
import cats.effect.Temporal
import com.eventstore.dbclient.proto.gossip.{ClusterInfo => PClusterInfo, GossipFs2Grpc}
import com.eventstore.dbclient.proto.shared.Empty
import sec.api.mapping.gossip.mkClusterInfo
/** API for reading gossip information from an EventStoreDB cluster.
*
* @tparam F
* the effect type in which [[Gossip]] operates.
*/
trait Gossip[F[_]] {
/** Gets cluster information.
*/
def read: F[ClusterInfo]
/** Returns an instance that uses provided [[UserCredentials]]. This is useful when reading cluster information that
* requires different credentials from what is provided through configuration.
*
* @param creds
* Custom user credentials to use.
*/
def withCredentials(creds: UserCredentials): Gossip[F]
}
object Gossip {
private[sec] def apply[F[_]: Temporal, C](
client: GossipFs2Grpc[F, C],
mkCtx: Option[UserCredentials] => C,
opts: Opts[F]
): Gossip[F] = new Gossip[F] {
val read: F[ClusterInfo] = read0(opts)(client.read(Empty(), mkCtx(None)))
def withCredentials(creds: UserCredentials): Gossip[F] = Gossip[F, C](client, _ => mkCtx(creds.some), opts)
}
private[sec] def read0[F[_]: Temporal](o: Opts[F])(f: F[PClusterInfo]): F[ClusterInfo] =
o.run(f, "read") >>= mkClusterInfo[F]
}