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implement Local multiplexed transport
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197 changes: 197 additions & 0 deletions
197
...rts/local/src/commonMain/kotlin/io/rsocket/kotlin/transport/local/LocalServerConnector.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,197 @@ | ||
| /* | ||
| * Copyright 2015-2024 the original author or authors. | ||
| * | ||
| * 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 io.rsocket.kotlin.transport.local | ||
|
|
||
| import io.ktor.utils.io.core.* | ||
| import io.rsocket.kotlin.internal.io.* | ||
| import io.rsocket.kotlin.transport.* | ||
| import kotlinx.coroutines.* | ||
| import kotlinx.coroutines.channels.* | ||
| import kotlin.coroutines.* | ||
|
|
||
| internal sealed class LocalServerConnector { | ||
| @RSocketTransportApi | ||
| abstract fun connect( | ||
| acceptor: RSocketServerAcceptor, | ||
| clientScope: CoroutineScope, | ||
| serverScope: CoroutineScope, | ||
| ): RSocketTransportSession | ||
|
|
||
| class Sequential( | ||
| private val connectionBufferCapacity: Int, | ||
| ) : LocalServerConnector() { | ||
| @RSocketTransportApi | ||
| override fun connect( | ||
| acceptor: RSocketServerAcceptor, | ||
| clientScope: CoroutineScope, | ||
| serverScope: CoroutineScope, | ||
| ): RSocketTransportSession { | ||
| clientScope.ensureActive() | ||
| serverScope.ensureActive() | ||
|
|
||
| val clientToServer = channelForCloseable<ByteReadPacket>(connectionBufferCapacity) | ||
| val serverToClient = channelForCloseable<ByteReadPacket>(connectionBufferCapacity) | ||
|
|
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| serverScope.launch { | ||
| acceptor.acceptSession( | ||
| Session( | ||
| coroutineContext = coroutineContext.childContext(), | ||
| outbound = serverToClient, | ||
| inbound = clientToServer | ||
| ) | ||
| ) | ||
| } | ||
|
|
||
| return Session( | ||
| coroutineContext = clientScope.coroutineContext.childContext(), | ||
| outbound = clientToServer, | ||
| inbound = serverToClient | ||
| ) | ||
| } | ||
|
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|
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| @RSocketTransportApi | ||
| private class Session( | ||
| override val coroutineContext: CoroutineContext, | ||
| private val outbound: SendChannel<ByteReadPacket>, | ||
| private val inbound: ReceiveChannel<ByteReadPacket>, | ||
| ) : RSocketTransportSession.Sequential { | ||
|
|
||
| init { | ||
| coroutineContext.job.invokeOnCompletion { | ||
| outbound.close(it) | ||
| inbound.cancel(CancellationException("Local connection closed", it)) | ||
| } | ||
| } | ||
|
|
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| override suspend fun sendFrame(frame: ByteReadPacket) { | ||
| outbound.send(frame) | ||
| } | ||
|
|
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| override suspend fun receiveFrame(): ByteReadPacket { | ||
| return inbound.receive() | ||
| } | ||
| } | ||
|
|
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| } | ||
|
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| class Multiplexed( | ||
| private val connectionStreamsQueueCapacity: Int, | ||
| private val streamBufferCapacity: Int, | ||
| ) : LocalServerConnector() { | ||
| @RSocketTransportApi | ||
| override fun connect( | ||
| acceptor: RSocketServerAcceptor, | ||
| clientScope: CoroutineScope, | ||
| serverScope: CoroutineScope, | ||
| ): RSocketTransportSession { | ||
| clientScope.ensureActive() | ||
| serverScope.ensureActive() | ||
|
|
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| val clientToServer = channelForCloseable<Stream>(connectionStreamsQueueCapacity) | ||
| val serverToClient = channelForCloseable<Stream>(connectionStreamsQueueCapacity) | ||
|
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| serverScope.launch { | ||
| acceptor.acceptSession( | ||
| Session( | ||
| coroutineContext = coroutineContext.childContext(), | ||
| outbound = serverToClient, | ||
| inbound = clientToServer, | ||
| streamBufferCapacity = streamBufferCapacity | ||
| ) | ||
| ) | ||
| } | ||
|
|
||
| return Session( | ||
| coroutineContext = clientScope.coroutineContext.childContext(), | ||
| outbound = clientToServer, | ||
| inbound = serverToClient, | ||
| streamBufferCapacity = streamBufferCapacity | ||
| ) | ||
| } | ||
|
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||
| @RSocketTransportApi | ||
| private class Session( | ||
| override val coroutineContext: CoroutineContext, | ||
| private val outbound: SendChannel<Stream>, | ||
| private val inbound: ReceiveChannel<Stream>, | ||
| private val streamBufferCapacity: Int, | ||
| ) : RSocketTransportSession.Multiplexed { | ||
| private val streamsContext = coroutineContext.supervisorContext() | ||
|
|
||
| init { | ||
| coroutineContext.job.invokeOnCompletion { | ||
| outbound.close(it) | ||
| inbound.cancel(CancellationException("Local connection closed", it)) | ||
| } | ||
| } | ||
|
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| override suspend fun createStream(): RSocketTransportSession.Multiplexed.Stream { | ||
| val clientToServer = channelForCloseable<ByteReadPacket>(streamBufferCapacity) | ||
| val serverToClient = channelForCloseable<ByteReadPacket>(streamBufferCapacity) | ||
|
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| outbound.send( | ||
| Stream( | ||
| coroutineContext = streamsContext.childContext(), | ||
| outbound = serverToClient, | ||
| inbound = clientToServer | ||
| ) | ||
| ) | ||
|
|
||
| return Stream( | ||
| coroutineContext = streamsContext.childContext(), | ||
| outbound = clientToServer, | ||
| inbound = serverToClient | ||
| ) | ||
| } | ||
|
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| override suspend fun awaitStream(): RSocketTransportSession.Multiplexed.Stream { | ||
| return inbound.receive() | ||
| } | ||
| } | ||
|
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| @RSocketTransportApi | ||
| private class Stream( | ||
| override val coroutineContext: CoroutineContext, | ||
| private val outbound: SendChannel<ByteReadPacket>, | ||
| private val inbound: ReceiveChannel<ByteReadPacket>, | ||
| ) : RSocketTransportSession.Multiplexed.Stream, Closeable { | ||
|
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| init { | ||
| coroutineContext.job.invokeOnCompletion { | ||
| outbound.close(it) | ||
| inbound.cancel(CancellationException("Local stream closed", it)) | ||
| } | ||
| } | ||
|
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| override fun updatePriority(value: Int) {} // no effect | ||
|
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| override suspend fun sendFrame(frame: ByteReadPacket) { | ||
| outbound.send(frame) | ||
| } | ||
|
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| override suspend fun receiveFrame(): ByteReadPacket { | ||
| return inbound.receive() | ||
| } | ||
|
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| override fun close() { | ||
| cancel("Stream is closed") // just for undelivered element case | ||
| } | ||
| } | ||
|
|
||
| } | ||
| } |
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