Fix visibility range for collective

controls-constructor/src/commonMain/kotlin/space/kscience/controls/constructor/DeviceState.kt

@@ -74,7 +74,8 @@ public fun <T, R> DeviceState.Companion.map(
 
 public fun <T, R> DeviceState<T>.map(mapper: (T) -> R): DeviceStateWithDependencies<R> = DeviceState.map(this, mapper)
 
-public fun DeviceState<NumericalValue<out UnitsOfMeasurement>>.values(): DeviceState<Double> = object : DeviceState<Double> {
+public fun DeviceState<NumericalValue<out UnitsOfMeasurement>>.values(): DeviceState<Double> =
+    object : DeviceState<Double> {
         override val value: Double
             get() = this@values.value.value
 
@@ -82,7 +83,7 @@ public fun DeviceState<NumericalValue<out UnitsOfMeasurement>>.values(): DeviceS
             get() = this@values.valueFlow.map { it.value }
 
         override fun toString(): String = this@values.toString()
-}
+    }
 
 /**
  * Combine two device states into one read-only [DeviceState]. Only the latest value of each state is used.

controls-core/src/commonMain/kotlin/space/kscience/controls/misc/converters.kt

@@ -41,7 +41,8 @@ private object InstantConverter : MetaConverter<Instant> {
 public val MetaConverter.Companion.instant: MetaConverter<Instant> get() = InstantConverter
 
 private object DoubleRangeConverter : MetaConverter<ClosedFloatingPointRange<Double>> {
-    override fun readOrNull(source: Meta): ClosedFloatingPointRange<Double>? = source.value?.doubleArray?.let { (start, end)->
+    override fun readOrNull(source: Meta): ClosedFloatingPointRange<Double>? =
+        source.value?.doubleArray?.let { (start, end) ->
             start..end
         }
 
@@ -51,3 +52,11 @@ private object DoubleRangeConverter : MetaConverter<ClosedFloatingPointRange<Dou
 }
 
 public val MetaConverter.Companion.doubleRange: MetaConverter<ClosedFloatingPointRange<Double>> get() = DoubleRangeConverter
+
+private object StringListConverter : MetaConverter<List<String>> {
+    override fun convert(obj: List<String>): Meta = Meta(obj.map { it.asValue() }.asValue())
+
+    override fun readOrNull(source: Meta): List<String>? = source.stringList ?: source["@jsonArray"]?.stringList
+}
+
+public val MetaConverter.Companion.stringList: MetaConverter<List<String>> get() = StringListConverter

controls-core/src/commonMain/kotlin/space/kscience/controls/peer/PeerConnection.kt

@@ -2,14 +2,13 @@ package space.kscience.controls.peer
 
 import space.kscience.dataforge.io.Envelope
 import space.kscience.dataforge.meta.Meta
-import space.kscience.dataforge.names.Name
 
 /**
  * A manager that allows direct synchronous sending and receiving binary data
  */
 public interface PeerConnection {
     /**
-     * Receive an [Envelope] from a device with name [deviceName] on a given [address] with given [contentId].
+     * Receive an [Envelope] from a device on a given [address] with given [contentId].
      *
      * The address depends on the specifics of given [PeerConnection]. For example, it could be a TCP/IP port or
      * magix endpoint name.
@@ -20,13 +19,12 @@ public interface PeerConnection {
      */
     public suspend fun receive(
         address: String,
-        deviceName: Name,
         contentId: String,
         requestMeta: Meta = Meta.EMPTY,
     ): Envelope
 
     /**
-     * Send an [envelope] to a device with name [deviceName] on a given [address]
+     * Send an [envelope] to a device on a given [address]
      *
      * The address depends on the specifics of given [PeerConnection]. For example, it could be a TCP/IP port or
      * magix endpoint name.
@@ -35,7 +33,6 @@ public interface PeerConnection {
      */
     public suspend fun send(
         address: String,
-        deviceName: Name,
         envelope: Envelope,
         requestMeta: Meta = Meta.EMPTY,
     )

controls-magix/src/commonMain/kotlin/space/kscience/controls/client/clientPropertyAccess.kt

@@ -19,10 +19,13 @@ import space.kscience.dataforge.meta.Meta
 public suspend fun <T> DeviceClient.read(propertySpec: DevicePropertySpec<*, T>): T =
     propertySpec.converter.readOrNull(readProperty(propertySpec.name)) ?: error("Property read result is not valid")
 
-
 public suspend fun <T> DeviceClient.request(propertySpec: DevicePropertySpec<*, T>): T =
     propertySpec.converter.read(getOrReadProperty(propertySpec.name))
 
+public fun <T> DeviceClient.getCached(propertySpec: DevicePropertySpec<*, T>): T? =
+    getProperty(propertySpec.name)?.let { propertySpec.converter.read(it) }
+
+
 public suspend fun <T> DeviceClient.write(propertySpec: MutableDevicePropertySpec<*, T>, value: T) {
     writeProperty(propertySpec.name, propertySpec.converter.convert(value))
 }

controls-server/src/jvmMain/kotlin/space/kscience/controls/server/deviceWebServer.kt

@@ -38,6 +38,7 @@ import space.kscience.dataforge.names.get
 import space.kscience.magix.api.MagixEndpoint
 import space.kscience.magix.api.MagixFlowPlugin
 import space.kscience.magix.api.MagixMessage
+import space.kscience.magix.api.start
 import space.kscience.magix.server.magixModule
 
 
@@ -215,5 +216,6 @@ public fun Application.deviceManagerModule(
     plugins.forEach {
         it.start(this, magixFlow)
     }
+
     magixModule(magixFlow)
 }

demo/device-collective/build.gradle.kts

@@ -13,7 +13,9 @@ kscience {
     commonMain {
         implementation(projects.controlsVisualisationCompose)
         implementation(projects.controlsConstructor)
+        implementation(projects.magix.magixServer)
         implementation(projects.magix.magixRsocket)
+        implementation(projects.controlsMagix)
     }
     jvmMain {
 //        implementation("io.ktor:ktor-server-cio")

demo/device-collective/src/jvmMain/kotlin/CollectiveDevice.kt

@@ -3,27 +3,36 @@
 package space.kscience.controls.demo.collective
 
 import space.kscience.controls.api.Device
-import space.kscience.controls.constructor.DeviceConstructor
-import space.kscience.controls.constructor.MutableDeviceState
-import space.kscience.controls.constructor.registerAsProperty
+import space.kscience.controls.constructor.*
+import space.kscience.controls.misc.stringList
+import space.kscience.controls.peer.PeerConnection
 import space.kscience.controls.spec.DeviceSpec
 import space.kscience.dataforge.context.Context
 import space.kscience.dataforge.meta.MetaConverter
 import space.kscience.dataforge.meta.Scheme
+import space.kscience.dataforge.meta.int
 import space.kscience.dataforge.meta.string
 import space.kscience.dataforge.misc.DFExperimental
 import space.kscience.maps.coordinates.Gmc
+import space.kscience.maps.coordinates.GmcCurve
 import kotlin.time.Duration.Companion.milliseconds
 
-class CollectiveDeviceConfiguration(deviceId: DeviceId) : Scheme() {
+typealias CollectiveDeviceId = String
+
+class CollectiveDeviceConfiguration(deviceId: CollectiveDeviceId) : Scheme() {
     var deviceId by string(deviceId)
     var description by string()
+    var reportInterval by int(500)
+    var radioFrequency by string(default = "169 MHz")
 }
 
+typealias CollectiveDeviceRoster = Map<CollectiveDeviceId, CollectiveDeviceConfiguration>
 
 interface CollectiveDevice : Device {
 
-    public val id: DeviceId
+    public val id: CollectiveDeviceId
+
+    public val peerConnection: PeerConnection
 
     suspend fun getPosition(): Gmc
 
@@ -31,8 +40,7 @@ interface CollectiveDevice : Device {
 
     suspend fun setVelocity(value: GmcVelocity)
 
-    suspend fun listVisible(): Collection<DeviceId>
-
+    suspend fun listVisible(): Collection<CollectiveDeviceId>
 
     companion object : DeviceSpec<CollectiveDevice>() {
         val position by property<Gmc>(
@@ -45,6 +53,17 @@ interface CollectiveDevice : Device {
             read = { getVelocity() },
             write = { _, value -> setVelocity(value) }
         )
+
+        val visibleNeighbors by property(
+            MetaConverter.stringList,
+            read = {
+                listVisible().toList()
+            }
+        )
+
+//        val listVisible by action(MetaConverter.unit, MetaConverter.valueList<String> { it.string }) {
+//            listVisible().toList()
+//        }
     }
 }
 
@@ -54,13 +73,34 @@ class CollectiveDeviceConstructor(
     val configuration: CollectiveDeviceConfiguration,
     position: MutableDeviceState<Gmc>,
     velocity: MutableDeviceState<GmcVelocity>,
-    private val listVisible: suspend () -> Collection<DeviceId>,
+    override val peerConnection: PeerConnection,
+    private val observation: suspend () -> Map<CollectiveDeviceId, GmcCurve>,
 ) : DeviceConstructor(context, configuration.meta), CollectiveDevice {
 
-    override val id: DeviceId get() = configuration.deviceId
+    override val id: CollectiveDeviceId get() = configuration.deviceId
 
-    val position = registerAsProperty(CollectiveDevice.position, position.sample(500.milliseconds))
-    val velocity = registerAsProperty(CollectiveDevice.velocity, velocity)
+    val position = registerAsProperty(
+        CollectiveDevice.position,
+        position.sample(configuration.reportInterval.milliseconds)
+    )
+
+    val velocity = registerAsProperty(
+        CollectiveDevice.velocity,
+        velocity.sample(configuration.reportInterval.milliseconds)
+    )
+
+    private val _visibleNeighbors: MutableDeviceState<Collection<CollectiveDeviceId>> = stateOf(emptyList())
+
+    val visibleNeighbors = registerAsProperty(
+        CollectiveDevice.visibleNeighbors,
+        _visibleNeighbors.map { it.toList() }
+    )
+
+    init {
+        position.onNext {
+            _visibleNeighbors.value = observation.invoke().keys
+        }
+    }
 
     override suspend fun getPosition(): Gmc = position.value
 
@@ -70,5 +110,5 @@ class CollectiveDeviceConstructor(
         velocity.value = value
     }
 
-    override suspend fun listVisible(): Collection<DeviceId> = listVisible.invoke()
+    override suspend fun listVisible(): Collection<CollectiveDeviceId> = observation.invoke().keys
 }

demo/device-collective/src/jvmMain/kotlin/DeviceCollectiveModel.kt

@@ -1,27 +1,39 @@
 package space.kscience.controls.demo.collective
 
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+import space.kscience.controls.client.launchMagixService
 import space.kscience.controls.constructor.ModelConstructor
 import space.kscience.controls.constructor.MutableDeviceState
 import space.kscience.controls.constructor.onTimer
+import space.kscience.controls.manager.DeviceManager
+import space.kscience.controls.manager.install
+import space.kscience.controls.peer.PeerConnection
 import space.kscience.dataforge.context.Context
+import space.kscience.dataforge.context.request
+import space.kscience.dataforge.io.Envelope
+import space.kscience.dataforge.meta.Meta
+import space.kscience.dataforge.names.parseAsName
+import space.kscience.magix.api.MagixEndpoint
+import space.kscience.magix.rsocket.rSocketWithWebSockets
+import space.kscience.magix.server.startMagixServer
 import space.kscience.maps.coordinates.*
 
 
-typealias DeviceId = String
-
-
-internal data class VirtualDeviceState(
-    val id: DeviceId,
+internal data class CollectiveDeviceState(
+    val id: CollectiveDeviceId,
     val configuration: CollectiveDeviceConfiguration,
     val position: MutableDeviceState<Gmc>,
     val velocity: MutableDeviceState<GmcVelocity>,
 )
 
 internal fun VirtualDeviceState(
-    id: DeviceId,
+    id: CollectiveDeviceId,
     position: Gmc,
     configuration: CollectiveDeviceConfiguration.() -> Unit = {},
-) = VirtualDeviceState(
+) = CollectiveDeviceState(
     id,
     CollectiveDeviceConfiguration(id).apply(configuration),
     MutableDeviceState(position),
@@ -31,9 +43,10 @@ internal fun VirtualDeviceState(
 
 internal class DeviceCollectiveModel(
     context: Context,
-    val deviceStates: Collection<VirtualDeviceState>,
-    val visibilityRange: Distance,
-) : ModelConstructor(context) {
+    val deviceStates: Collection<CollectiveDeviceState>,
+    val visibilityRange: Distance = 0.5.kilometers,
+    val radioRange: Distance = 5.kilometers,
+) : ModelConstructor(context), PeerConnection {
 
     /**
      * Propagate movement
@@ -45,7 +58,7 @@ internal class DeviceCollectiveModel(
         }
     }
 
-    suspend fun locateVisible(id: DeviceId): Map<DeviceId, GmcCurve> {
+    private fun locateVisible(id: CollectiveDeviceId): Map<CollectiveDeviceId, GmcCurve> {
         val coordinatesSnapshot = deviceStates.associate { it.id to it.position.value }
 
         val selected = coordinatesSnapshot[id] ?: error("Can't find device with id $id")
@@ -56,4 +69,53 @@ internal class DeviceCollectiveModel(
 
         return allCurves.filterValues { it.distance in 0.kilometers..visibilityRange }
     }
+
+    val devices = deviceStates.associate {
+        val device = CollectiveDeviceConstructor(
+            context = context,
+            configuration = it.configuration,
+            position = it.position,
+            velocity = it.velocity,
+            peerConnection = this,
+        ) {
+            locateVisible(it.id)
+        }
+        //start movement program
+        device.moveInCircles()
+        it.id to device
+    }
+
+    val roster = deviceStates.associate { it.id to it.configuration }
+
+    override suspend fun receive(address: String, contentId: String, requestMeta: Meta): Envelope {
+        TODO("Not yet implemented")
+    }
+
+    override suspend fun send(address: String, envelope: Envelope, requestMeta: Meta) {
+//        devices.values.filter { it.configuration.radioFrequency == address }.forEach { device ->
+//            ```
+//        }
+    }
+}
+
+internal fun CoroutineScope.launchCollectiveMagixServer(
+    collectiveModel: DeviceCollectiveModel,
+): Job = launch(Dispatchers.IO) {
+    val server = startMagixServer(
+//        RSocketMagixFlowPlugin()
+    )
+    val deviceEndpoint = MagixEndpoint.rSocketWithWebSockets("localhost")
+
+    collectiveModel.devices.forEach { (id, device) ->
+        val deviceContext = collectiveModel.context.buildContext(id.parseAsName()) {
+            coroutineContext(coroutineContext)
+            plugin(DeviceManager)
+        }
+
+        deviceContext.install(id, device)
+
+//        val deviceEndpoint = MagixEndpoint.rSocketWithWebSockets("localhost")
+
+        deviceContext.request(DeviceManager).launchMagixService(deviceEndpoint, id)
+    }
 }

demo/device-collective/src/jvmMain/kotlin/SampleDeviceState.kt

@@ -4,6 +4,7 @@ import kotlinx.coroutines.FlowPreview
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.sample
 import space.kscience.controls.constructor.DeviceState
+import space.kscience.controls.constructor.MutableDeviceState
 import kotlin.time.Duration
 
 @OptIn(FlowPreview::class)
@@ -11,10 +12,24 @@ class SampleDeviceState<T>(
     val origin: DeviceState<T>,
     val interval: Duration,
 ) : DeviceState<T> {
-    override val value: T get() = origin.value
+    override val value: T by origin::value
     override val valueFlow: Flow<T> get() = origin.valueFlow.sample(interval)
 
     override fun toString(): String = "DebounceDeviceState($value, interval=$interval)"
 }
 
+
 fun <T> DeviceState<T>.sample(interval: Duration) = SampleDeviceState(this, interval)
+
+@OptIn(FlowPreview::class)
+class MutableSampleDeviceState<T>(
+    val origin: MutableDeviceState<T>,
+    val interval: Duration,
+) : MutableDeviceState<T> {
+    override var value: T by origin::value
+    override val valueFlow: Flow<T> get() = origin.valueFlow.sample(interval)
+
+    override fun toString(): String = "DebounceDeviceState($value, interval=$interval)"
+}
+
+fun <T> MutableDeviceState<T>.sample(interval: Duration) = MutableSampleDeviceState(this, interval)

demo/device-collective/src/jvmMain/kotlin/debugModel.kt

@@ -12,6 +12,8 @@ import space.kscience.maps.coordinates.Gmc
 import space.kscience.maps.coordinates.kilometers
 import kotlin.math.PI
 import kotlin.random.Random
+import kotlin.time.Duration
+import kotlin.time.Duration.Companion.milliseconds
 
 private val deviceVelocity = 0.1.kilometers
 
@@ -19,8 +21,13 @@ private val center = Gmc.ofDegrees(55.925, 37.514)
 private val radius = 0.01.degrees
 
 
-internal fun generateModel(context: Context): DeviceCollectiveModel {
-    val devices: List<VirtualDeviceState> = List(100) { index ->
+internal fun generateModel(
+    context: Context,
+    size: Int = 50,
+    reportInterval: Duration = 500.milliseconds,
+    additionalConfiguration: CollectiveDeviceConfiguration.() -> Unit = {},
+): DeviceCollectiveModel {
+    val devices: List<CollectiveDeviceState> = List(size) { index ->
         val id = "device[$index]"
 
         VirtualDeviceState(
@@ -32,10 +39,12 @@ internal fun generateModel(context: Context): DeviceCollectiveModel {
         ) {
             deviceId = id
             description = "Virtual remote device $id"
+            this.reportInterval = reportInterval.inWholeMilliseconds.toInt()
+            additionalConfiguration()
         }
     }
 
-    val model = DeviceCollectiveModel(context, devices, 0.2.kilometers)
+    val model = DeviceCollectiveModel(context, devices)
 
     return model
 }

demo/device-collective/src/jvmMain/kotlin/main.kt

@@ -10,6 +10,7 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.material.Card
 import androidx.compose.material.Checkbox
 import androidx.compose.material.Text
+import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
@@ -24,74 +25,103 @@ import androidx.compose.ui.window.Window
 import androidx.compose.ui.window.application
 import io.ktor.client.HttpClient
 import io.ktor.client.engine.cio.CIO
+import kotlinx.coroutines.CompletableDeferred
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import org.jetbrains.compose.splitpane.ExperimentalSplitPaneApi
 import org.jetbrains.compose.splitpane.HorizontalSplitPane
 import org.jetbrains.compose.splitpane.rememberSplitPaneState
+import space.kscience.controls.api.PropertyChangedMessage
+import space.kscience.controls.client.*
 import space.kscience.controls.compose.conditional
 import space.kscience.controls.manager.DeviceManager
-import space.kscience.controls.spec.useProperty
 import space.kscience.dataforge.context.Context
-import space.kscience.dataforge.context.request
+import space.kscience.dataforge.context.ContextBuilder
+import space.kscience.dataforge.meta.MetaConverter
+import space.kscience.dataforge.names.parseAsName
+import space.kscience.magix.api.MagixEndpoint
+import space.kscience.magix.api.subscribe
+import space.kscience.magix.rsocket.rSocketWithWebSockets
 import space.kscience.maps.compose.MapView
 import space.kscience.maps.compose.OpenStreetMapTileProvider
+import space.kscience.maps.coordinates.Gmc
+import space.kscience.maps.coordinates.meters
 import space.kscience.maps.features.*
 import java.nio.file.Path
+import kotlin.time.Duration.Companion.seconds
 
 
 @Composable
-fun rememberDeviceManager(): DeviceManager = remember {
-    val context = Context {
-        plugin(DeviceManager)
-    }
-
-    context.request(DeviceManager)
+fun rememberContext(name: String, contextBuilder: ContextBuilder.() -> Unit = {}): Context = remember {
+    Context(name, contextBuilder)
 }
 
+private val gmcMetaConverter = MetaConverter.serializable<Gmc>()
+
 @Composable
 fun App() {
     val scope = rememberCoroutineScope()
 
-
-    val deviceManager = rememberDeviceManager()
-
+    val parentContext = rememberContext("Parent") {
+        plugin(DeviceManager)
+    }
 
     val collectiveModel = remember {
-        generateModel(deviceManager.context)
+        generateModel(parentContext, 100, reportInterval = 1.seconds)
     }
 
-    val devices: Map<DeviceId, CollectiveDevice> = remember {
-        collectiveModel.deviceStates.associate {
-            val device = CollectiveDeviceConstructor(
-                context = deviceManager.context,
-                configuration = it.configuration,
-                position = it.position,
-                velocity = it.velocity
-            ) {
-                collectiveModel.locateVisible(it.id).keys
+    val roster = remember {
+        collectiveModel.roster
+    }
+
+    val client = remember { CompletableDeferred<MagixEndpoint>() }
+
+    val devices = remember { mutableStateMapOf<CollectiveDeviceId, DeviceClient>() }
+
+
+    LaunchedEffect(collectiveModel) {
+        launchCollectiveMagixServer(collectiveModel)
+
+        withContext(Dispatchers.IO) {
+            val magixClient = MagixEndpoint.rSocketWithWebSockets("localhost")
+
+            client.complete(magixClient)
+
+            collectiveModel.roster.forEach { (id, config) ->
+                scope.launch {
+                    devices[id] = magixClient.remoteDevice(parentContext, "listener", id, id.parseAsName())
                 }
-            device.moveInCircles()
-            it.id to device
             }
         }
 
-    var selectedDeviceId by remember { mutableStateOf<DeviceId?>(null) }
+    }
+
+    var selectedDeviceId by remember { mutableStateOf<CollectiveDeviceId?>(null) }
+
+    var currentPosition by remember { mutableStateOf<Gmc?>(null) }
+
+    LaunchedEffect(selectedDeviceId, devices) {
+        selectedDeviceId?.let { devices[it] }?.propertyFlow(CollectiveDevice.position)?.collect {
+            currentPosition = it
+        }
+    }
+
     var showOnlyVisible by remember { mutableStateOf(false) }
 
-    val mapTileProvider = remember {
-        OpenStreetMapTileProvider(
-            client = HttpClient(CIO),
-            cacheDirectory = Path.of("mapCache")
-        )
-    }
-
     HorizontalSplitPane(
         splitPaneState = rememberSplitPaneState(0.9f)
     ) {
         first(400.dp) {
             MapView(
-                mapTileProvider = mapTileProvider,
+                mapTileProvider = remember {
+                    OpenStreetMapTileProvider(
+                        client = HttpClient(CIO),
+                        cacheDirectory = Path.of("mapCache")
+                    )
+                },
                 config = ViewConfig()
             ) {
                 collectiveModel.deviceStates.forEach { device ->
@@ -103,12 +133,20 @@ fun App() {
                     }.launchIn(scope)
                 }
 
-                devices.forEach { (id, device) ->
-                    device.useProperty(CollectiveDevice.position, scope = scope) { position ->
+                scope.launch {
 
+                    client.await().subscribe(DeviceManager.magixFormat).onEach { (magixMessage, deviceMessage) ->
+                        if (deviceMessage is PropertyChangedMessage && deviceMessage.property == "position") {
+                            val id = magixMessage.sourceEndpoint
+                            val position = gmcMetaConverter.read(deviceMessage.value)
                             val activeDevice = selectedDeviceId?.let { devices[it] }
 
-                        if (activeDevice == null || id == selectedDeviceId || !showOnlyVisible || id in activeDevice.listVisible()) {
+                            if (
+                                activeDevice == null ||
+                                id == selectedDeviceId ||
+                                !showOnlyVisible ||
+                                id in activeDevice.request(CollectiveDevice.visibleNeighbors)
+                            ) {
                                 rectangle(
                                     position,
                                     id = id,
@@ -119,66 +157,80 @@ fun App() {
                             } else {
                                 removeFeature(id)
                             }
+                        }
+                    }.launchIn(scope)
 
                 }
             }
         }
-        }
         second(200.dp) {
-            Column {
-                selectedDeviceId?.let { id ->
-                    Column(
-                        modifier = Modifier
-                            .padding(8.dp)
-                            .border(2.dp, Color.DarkGray)
-                    ) {
-                        Card(
-                            elevation = 16.dp,
-                        ) {
-                            Text(
-                                text = "Выбран: $id",
-                                fontSize = 16.sp,
-                                fontWeight = FontWeight.Bold,
-                                modifier = Modifier.padding(10.dp).fillMaxWidth()
-                            )
-                        }
-                        devices[id]?.let {
-                            Text(it.meta.toString(), Modifier.padding(10.dp))
-                        }
-                        Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.padding(10.dp).fillMaxWidth()) {
-                            Text("Показать только видимые")
-                            Checkbox(showOnlyVisible, { showOnlyVisible = it })
-                        }
-                    }
-                }
+
             Column(
                 modifier = Modifier.verticalScroll(rememberScrollState())
             ) {
-                    devices.forEach { (id, device) ->
+                collectiveModel.roster.forEach { (id, _) ->
                     Card(
                         elevation = 16.dp,
                         modifier = Modifier.padding(8.dp).onClick {
                             selectedDeviceId = id
                         }.conditional(id == selectedDeviceId) {
                             border(2.dp, Color.Blue)
-                            }
+                        },
                     ) {
+                        Column(
+                            modifier = Modifier.padding(8.dp)
+                        ) {
+                            Row(verticalAlignment = Alignment.CenterVertically) {
+                                if (devices[id] == null) {
+                                    CircularProgressIndicator()
+                                }
                                 Text(
                                     text = id,
                                     fontSize = 16.sp,
                                     fontWeight = FontWeight.Bold,
-                                modifier = Modifier.padding(10.dp).fillMaxWidth()
+                                    modifier = Modifier.padding(10.dp).fillMaxWidth(),
                                 )
                             }
+                            if (id == selectedDeviceId) {
+                                roster[id]?.let {
+                                    Text("Meta:", color = Color.Blue, fontWeight = FontWeight.Bold)
+                                    Card(elevation = 16.dp, modifier = Modifier.fillMaxWidth().padding(8.dp)) {
+                                        Text(it.toString())
+                                    }
+                                }
+
+                                currentPosition?.let { currentPosition ->
+                                    Text(
+                                        "Широта: ${String.format("%.3f", currentPosition.latitude.toDegrees().value)}"
+                                    )
+                                    Text(
+                                        "Долгота: ${String.format("%.3f", currentPosition.longitude.toDegrees().value)}"
+                                    )
+                                    currentPosition.elevation?.let {
+                                        Text("Высота: ${String.format("%.1f", it.meters)} м")
+                                    }
+                                }
+
+                                Row(
+                                    verticalAlignment = Alignment.CenterVertically,
+                                    modifier = Modifier.fillMaxWidth()
+                                ) {
+                                    Text("Показать только видимые")
+                                    Checkbox(showOnlyVisible, { showOnlyVisible = it })
                                 }
                             }
                         }
                     }
                 }
+            }
+
+        }
+    }
 }
 
 
 fun main() = application {
+//    System.setProperty(IO_PARALLELISM_PROPERTY_NAME, 300.toString())
     Window(onCloseRequest = ::exitApplication, title = "Maps-kt demo", icon = painterResource("SPC-logo.png")) {
         MaterialTheme {
             App()

demo/many-devices/src/main/kotlin/space/kscience/controls/demo/MassDevice.kt

@@ -83,8 +83,7 @@ suspend fun main() {
 
         val endpointId = "device$it"
         val deviceEndpoint = MagixEndpoint.rSocketStreamWithWebSockets("localhost")
-        deviceManager.launchMagixService(deviceEndpoint, endpointId, Dispatchers.IO)
-
+        deviceManager.launchMagixService(deviceEndpoint, endpointId)
     }
 
     val trace = Bar {

magix/magix-api/src/commonMain/kotlin/space/kscience/magix/api/MagixFlowPlugin.kt

@@ -21,9 +21,10 @@ public fun interface MagixFlowPlugin {
         sendMessage: suspend (MagixMessage) -> Unit,
     ): Job
 
-    /**
+}
+
+/**
  * Use the same [MutableSharedFlow] to send and receive messages. Could be a bottleneck in case of many plugins.
  */
-    public fun start(scope: CoroutineScope, magixFlow: MutableSharedFlow<MagixMessage>): Job =
+public fun MagixFlowPlugin.start(scope: CoroutineScope, magixFlow: MutableSharedFlow<MagixMessage>): Job =
     start(scope, magixFlow) { magixFlow.emit(it) }
-}

magix/magix-server/src/jvmMain/kotlin/space/kscience/magix/server/magixModule.kt

@@ -10,7 +10,9 @@ import io.ktor.server.util.getValue
 import io.ktor.server.websocket.WebSockets
 import io.rsocket.kotlin.ktor.server.RSocketSupport
 import io.rsocket.kotlin.ktor.server.rSocket
+import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.SharedFlow
 import kotlinx.coroutines.flow.map
 import kotlinx.html.*
 import kotlinx.serialization.encodeToString
@@ -42,7 +44,11 @@ private fun ApplicationCall.buildFilter(): MagixMessageFilter {
 /**
  * Attach magix http/sse and websocket-based rsocket event loop + statistics page to existing [MutableSharedFlow]
  */
-public fun Application.magixModule(magixFlow: MutableSharedFlow<MagixMessage>, route: String = "/") {
+public fun Application.magixModule(
+    magixFlow: Flow<MagixMessage>,
+    send: suspend (MagixMessage) -> Unit,
+    route: String = "/",
+) {
     if (pluginOrNull(WebSockets) == null) {
         install(WebSockets)
     }
@@ -62,9 +68,10 @@ public fun Application.magixModule(magixFlow: MutableSharedFlow<MagixMessage>, r
 
     routing {
         route(route) {
-            install(ContentNegotiation){
+            install(ContentNegotiation) {
                 json()
             }
+            if (magixFlow is SharedFlow) {
                 get("state") {
                     call.respondHtml {
                         head {
@@ -75,7 +82,9 @@ public fun Application.magixModule(magixFlow: MutableSharedFlow<MagixMessage>, r
                         }
                         body {
                             h1 { +"Magix loop statistics" }
+                            if (magixFlow is MutableSharedFlow) {
                                 h2 { +"Number of subscribers: ${magixFlow.subscriptionCount.value}" }
+                            }
                             h3 { +"Replay cache size: ${magixFlow.replayCache.size}" }
                             h3 { +"Replay cache:" }
                             ol {
@@ -90,6 +99,7 @@ public fun Application.magixModule(magixFlow: MutableSharedFlow<MagixMessage>, r
                         }
                     }
                 }
+            }
             //SSE server. Filter from query
             get("sse") {
                 val filter = call.buildFilter()
@@ -102,17 +112,22 @@ public fun Application.magixModule(magixFlow: MutableSharedFlow<MagixMessage>, r
             }
             post("broadcast") {
                 val message = call.receive<MagixMessage>()
-                magixFlow.emit(message)
+                send(message)
             }
             //rSocket WS server. Filter from Payload
             rSocket(
                 "rsocket",
-                acceptor = RSocketMagixFlowPlugin.acceptor(application, magixFlow) { magixFlow.emit(it) }
+                acceptor = RSocketMagixFlowPlugin.acceptor(application, magixFlow) { send(it) }
             )
         }
     }
 }
 
+public fun Application.magixModule(
+    magixFlow: MutableSharedFlow<MagixMessage>,
+    route: String = "/",
+): Unit = magixModule(magixFlow, { magixFlow.emit(it) }, route)
+
 /**
  * Create a new loop [MutableSharedFlow] with given [buffer] and setup magix module based on it
  */

magix/magix-server/src/jvmMain/kotlin/space/kscience/magix/server/server.kt

@@ -9,6 +9,7 @@ import kotlinx.coroutines.flow.MutableSharedFlow
 import space.kscience.magix.api.MagixEndpoint.Companion.DEFAULT_MAGIX_HTTP_PORT
 import space.kscience.magix.api.MagixFlowPlugin
 import space.kscience.magix.api.MagixMessage
+import space.kscience.magix.api.start
 
 
 /**
@@ -22,7 +23,6 @@ public fun CoroutineScope.startMagixServer(
 
     val magixFlow = MutableSharedFlow<MagixMessage>(
         replay = buffer,
-        extraBufferCapacity = buffer,
         onBufferOverflow = BufferOverflow.DROP_OLDEST
     )