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reads.scala
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reads.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 syntax
import fs2.Stream
import sec.api.*
import sec.api.streams.Reads
trait ReadsSyntax:
extension [F[_]](r: Reads[F])
/** Read [[sec.api.AllMessage]] messages forwards from the global stream, [[sec.StreamId.All]].
*
* @param from
* log position to read from.
* @param maxCount
* limits maximum events returned.
* @param resolveLinkTos
* whether to resolve [[EventType.LinkTo]] events automatically.
* @return
* a [[fs2.Stream]] that emits [[sec.api.AllMessage]] values.
*/
def readAllMessagesForwards(
from: LogPosition = LogPosition.Start,
maxCount: Long = Long.MaxValue,
resolveLinkTos: Boolean = false
): Stream[F, AllMessage] =
r.readAllMessages(from, Direction.Forwards, maxCount, resolveLinkTos)
/** Read [[sec.api.AllMessage]] messages backwards from the global stream, [[sec.StreamId.All]].
*
* @param from
* log position to read from.
* @param maxCount
* limits maximum events returned.
* @param resolveLinkTos
* whether to resolve [[EventType.LinkTo]] events automatically.
* @return
* a [[fs2.Stream]] that emits [[sec.api.AllMessage]] values.
*/
def readAllMessagesBackwards(
from: LogPosition = LogPosition.End,
maxCount: Long = Long.MaxValue,
resolveLinkTos: Boolean = false
): Stream[F, AllMessage] =
r.readAllMessages(from, Direction.Backwards, maxCount, resolveLinkTos)
/** Read [[sec.api.StreamMessage]] messages forwards from an individual stream.
*
* @param streamId
* the id of the stream to read from.
* @param from
* stream position to read from.
* @param maxCount
* limits maximum events returned.
* @param resolveLinkTos
* whether to resolve [[EventType.LinkTo]] events automatically.
* @return
* a [[fs2.Stream]] that emits [[sec.api.StreamMessage]] values.
*/
def readStreamMessagesForwards(
streamId: StreamId,
from: StreamPosition = StreamPosition.Start,
maxCount: Long = Long.MaxValue,
resolveLinkTos: Boolean = false
): Stream[F, StreamMessage] =
r.readStreamMessages(streamId, from, Direction.Forwards, maxCount, resolveLinkTos)
/** Read [[sec.api.StreamMessage]] messages backwards from an individual stream.
*
* @param streamId
* the id of the stream to read from.
* @param from
* stream position to read from.
* @param maxCount
* limits maximum events returned.
* @param resolveLinkTos
* whether to resolve [[EventType.LinkTo]] events automatically.
* @return
* a [[fs2.Stream]] that emits [[sec.api.StreamMessage]] values.
*/
def readStreamMessagesBackwards(
streamId: StreamId,
from: StreamPosition = StreamPosition.End,
maxCount: Long = Long.MaxValue,
resolveLinkTos: Boolean = false
): Stream[F, StreamMessage] =
r.readStreamMessages(streamId, from, Direction.Backwards, maxCount, resolveLinkTos)