Remove stand-alone properties and use specs instead

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/api/Device.kt

@@ -57,7 +57,7 @@ public interface Device : Closeable, ContextAware, CoroutineScope {
 
     /**
      * A subscription-based [Flow] of [DeviceMessage] provided by device. The flow is guaranteed to be readable
-     * multiple times
+     * multiple times.
      */
     public val messageFlow: Flow<DeviceMessage>
 
@@ -67,6 +67,14 @@ public interface Device : Closeable, ContextAware, CoroutineScope {
      */
     public suspend fun execute(action: String, argument: Meta? = null): Meta?
 
+    /**
+     * Initialize the device. This function suspends until the device is finished initialization
+     */
+    public suspend fun open(): Unit = Unit
+
+    /**
+     * Close and terminate the device. This function does not wait for device to be closed.
+     */
     override fun close() {
         cancel("The device is closed")
     }

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/base/DeviceAction.kt

@@ -1,10 +0,0 @@
-package ru.mipt.npm.controls.base
-
-import ru.mipt.npm.controls.api.ActionDescriptor
-import space.kscience.dataforge.meta.Meta
-
-public interface DeviceAction {
-    public val name: String
-    public val descriptor: ActionDescriptor
-    public suspend operator fun invoke(arg: Meta? = null): Meta?
-}

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/base/DeviceBase.kt

@@ -1,252 +0,0 @@
-package ru.mipt.npm.controls.base
-
-import kotlinx.coroutines.*
-import kotlinx.coroutines.flow.MutableSharedFlow
-import kotlinx.coroutines.flow.MutableStateFlow
-import kotlinx.coroutines.flow.SharedFlow
-import kotlinx.coroutines.flow.StateFlow
-import kotlinx.coroutines.sync.Mutex
-import kotlinx.coroutines.sync.withLock
-import ru.mipt.npm.controls.api.*
-import space.kscience.dataforge.context.Context
-import space.kscience.dataforge.meta.Meta
-import space.kscience.dataforge.misc.DFExperimental
-import kotlin.collections.set
-import kotlin.coroutines.CoroutineContext
-
-//TODO move to DataForge-core
-@DFExperimental
-public data class LogEntry(val content: String, val priority: Int = 0)
-
-
-@OptIn(ExperimentalCoroutinesApi::class)
-private open class BasicReadOnlyDeviceProperty(
-    val device: DeviceBase,
-    override val name: String,
-    default: Meta?,
-    override val descriptor: PropertyDescriptor,
-    private val getter: suspend (before: Meta?) -> Meta,
-) : ReadOnlyDeviceProperty {
-
-    override val scope: CoroutineScope get() = device
-
-    private val state: MutableStateFlow<Meta?> = MutableStateFlow(default)
-    override val value: Meta? get() = state.value
-
-    override suspend fun invalidate() {
-        state.value = null
-    }
-
-    override fun updateLogical(item: Meta) {
-        state.value = item
-        scope.launch {
-            device.sharedMessageFlow.emit(
-                PropertyChangedMessage(
-                    property = name,
-                    value = item,
-                )
-            )
-        }
-    }
-
-    override suspend fun read(force: Boolean): Meta {
-        //backup current value
-        val currentValue = value
-        return if (force || currentValue == null) {
-            //all device operations should be run on device context
-            //propagate error, but do not fail scope
-            val res = withContext(scope.coroutineContext + SupervisorJob(scope.coroutineContext[Job])) {
-                getter(currentValue)
-            }
-            updateLogical(res)
-            res
-        } else {
-            currentValue
-        }
-    }
-
-    override fun flow(): StateFlow<Meta?> = state
-}
-
-
-@OptIn(ExperimentalCoroutinesApi::class)
-private class BasicDeviceProperty(
-    device: DeviceBase,
-    name: String,
-    default: Meta?,
-    descriptor: PropertyDescriptor,
-    getter: suspend (Meta?) -> Meta,
-    private val setter: suspend (oldValue: Meta?, newValue: Meta) -> Meta?,
-) : BasicReadOnlyDeviceProperty(device, name, default, descriptor, getter), DeviceProperty {
-
-    override var value: Meta?
-        get() = super.value
-        set(value) {
-            scope.launch {
-                if (value == null) {
-                    invalidate()
-                } else {
-                    write(value)
-                }
-            }
-        }
-
-    private val writeLock = Mutex()
-
-    override suspend fun write(item: Meta) {
-        writeLock.withLock {
-            //fast return if value is not changed
-            if (item == value) return@withLock
-            val oldValue = value
-            //all device operations should be run on device context
-            withContext(scope.coroutineContext + SupervisorJob(scope.coroutineContext[Job])) {
-                setter(oldValue, item)?.let {
-                    updateLogical(it)
-                }
-            }
-        }
-    }
-}
-
-/**
- * Baseline implementation of [Device] interface
- */
-@Suppress("EXPERIMENTAL_API_USAGE")
-public abstract class DeviceBase(final override val context: Context) : Device {
-
-    override val coroutineContext: CoroutineContext =
-        context.coroutineContext + SupervisorJob(context.coroutineContext[Job])
-
-    private val _properties = HashMap<String, ReadOnlyDeviceProperty>()
-    public val properties: Map<String, ReadOnlyDeviceProperty> get() = _properties
-    private val _actions = HashMap<String, DeviceAction>()
-    public val actions: Map<String, DeviceAction> get() = _actions
-
-    internal val sharedMessageFlow = MutableSharedFlow<DeviceMessage>()
-
-    override val messageFlow: SharedFlow<DeviceMessage> get() = sharedMessageFlow
-    private val sharedLogFlow = MutableSharedFlow<LogEntry>()
-
-    /**
-     * The [SharedFlow] of log messages
-     */
-    @DFExperimental
-    public val logFlow: SharedFlow<LogEntry>
-        get() = sharedLogFlow
-
-    protected suspend fun log(message: String, priority: Int = 0) {
-        sharedLogFlow.emit(LogEntry(message, priority))
-    }
-
-    override val propertyDescriptors: Collection<PropertyDescriptor>
-        get() = _properties.values.map { it.descriptor }
-
-    override val actionDescriptors: Collection<ActionDescriptor>
-        get() = _actions.values.map { it.descriptor }
-
-    private fun <P : ReadOnlyDeviceProperty> registerProperty(name: String, property: P) {
-        if (_properties.contains(name)) error("Property with name $name already registered")
-        _properties[name] = property
-    }
-
-    internal fun registerAction(name: String, action: DeviceAction) {
-        if (_actions.contains(name)) error("Action with name $name already registered")
-        _actions[name] = action
-    }
-
-    override suspend fun readProperty(propertyName: String): Meta =
-        (_properties[propertyName] ?: error("Property with name $propertyName not defined")).read()
-
-    override fun getProperty(propertyName: String): Meta? =
-        (_properties[propertyName] ?: error("Property with name $propertyName not defined")).value
-
-    override suspend fun invalidate(propertyName: String) {
-        (_properties[propertyName] ?: error("Property with name $propertyName not defined")).invalidate()
-    }
-
-    override suspend fun writeProperty(propertyName: String, value: Meta) {
-        (_properties[propertyName] as? DeviceProperty ?: error("Property with name $propertyName not defined")).write(
-            value
-        )
-    }
-
-    override suspend fun execute(action: String, argument: Meta?): Meta? =
-        (_actions[action] ?: error("Request with name $action not defined")).invoke(argument)
-
-    /**
-     * Create a bound read-only property with given [getter]
-     */
-    public fun createReadOnlyProperty(
-        name: String,
-        default: Meta?,
-        descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-        getter: suspend (Meta?) -> Meta,
-    ): ReadOnlyDeviceProperty {
-        val property = BasicReadOnlyDeviceProperty(
-            this,
-            name,
-            default,
-            PropertyDescriptor(name).apply(descriptorBuilder),
-            getter
-        )
-        registerProperty(name, property)
-        return property
-    }
-
-
-    /**
-     * Create a bound mutable property with given [getter] and [setter]
-     */
-    internal fun createMutableProperty(
-        name: String,
-        default: Meta?,
-        descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-        getter: suspend (Meta?) -> Meta,
-        setter: suspend (oldValue: Meta?, newValue: Meta) -> Meta?,
-    ): DeviceProperty {
-        val property = BasicDeviceProperty(
-            this,
-            name,
-            default,
-            PropertyDescriptor(name).apply(descriptorBuilder),
-            getter,
-            setter
-        )
-        registerProperty(name, property)
-        return property
-    }
-
-    /**
-     * A stand-alone action
-     */
-    private inner class BasicDeviceAction(
-        override val name: String,
-        override val descriptor: ActionDescriptor,
-        private val block: suspend (Meta?) -> Meta?,
-    ) : DeviceAction {
-        override suspend fun invoke(arg: Meta?): Meta? =
-            withContext(coroutineContext) {
-                block(arg)
-            }
-    }
-
-    /**
-     * Create a new bound action
-     */
-    internal fun createAction(
-        name: String,
-        descriptorBuilder: ActionDescriptor.() -> Unit = {},
-        block: suspend (Meta?) -> Meta?,
-    ): DeviceAction {
-        val action = BasicDeviceAction(name, ActionDescriptor(name).apply(descriptorBuilder), block)
-        registerAction(name, action)
-        return action
-    }
-
-    public companion object {
-
-    }
-}
-
-
-

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/base/DeviceProperty.kt

@@ -1,74 +0,0 @@
-package ru.mipt.npm.controls.base
-
-import kotlinx.coroutines.*
-import kotlinx.coroutines.flow.Flow
-import ru.mipt.npm.controls.api.PropertyDescriptor
-import space.kscience.dataforge.meta.Meta
-import kotlin.time.Duration
-
-/**
- * Read-only device property
- */
-public interface ReadOnlyDeviceProperty {
-    /**
-     * Property name, should be unique in device
-     */
-    public val name: String
-
-    /**
-     * Property descriptor
-     */
-    public val descriptor: PropertyDescriptor
-
-    public val scope: CoroutineScope
-
-    /**
-     * Erase logical value and force re-read from device on next [read]
-     */
-    public suspend fun invalidate()
-
-    /**
-     * Directly update property logical value and notify listener without writing it to device
-     */
-    public fun updateLogical(item: Meta)
-
-    /**
-     *  Get cached value and return null if value is invalid or not initialized
-     */
-    public val value: Meta?
-
-    /**
-     * Read value either from cache if cache is valid or directly from physical device.
-     * If [force], reread from physical state even if the logical state is set.
-     */
-    public suspend fun read(force: Boolean = false): Meta
-
-    /**
-     * The [Flow] representing future logical states of the property.
-     * Produces null when the state is invalidated
-     */
-    public fun flow(): Flow<Meta?>
-}
-
-
-/**
- * Launch recurring force re-read job on a property scope with given [duration] between reads.
- */
-public fun ReadOnlyDeviceProperty.readEvery(duration: Duration): Job = scope.launch {
-    while (isActive) {
-        read(true)
-        delay(duration)
-    }
-}
-
-/**
- * A writeable device property with non-suspended write
- */
-public interface DeviceProperty : ReadOnlyDeviceProperty {
-    override var value: Meta?
-
-    /**
-     * Write value to physical device. Invalidates logical value, but does not update it automatically
-     */
-    public suspend fun write(item: Meta)
-}

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/base/TypedDeviceProperty.kt

@@ -1,58 +0,0 @@
-package ru.mipt.npm.controls.base
-
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.map
-import space.kscience.dataforge.meta.Meta
-import space.kscience.dataforge.meta.transformations.MetaConverter
-
-/**
- * A type-safe wrapper on top of read-only property
- */
-public open class TypedReadOnlyDeviceProperty<T : Any>(
-    private val property: ReadOnlyDeviceProperty,
-    protected val converter: MetaConverter<T>,
-) : ReadOnlyDeviceProperty by property {
-
-    public fun updateLogical(obj: T) {
-        property.updateLogical(converter.objectToMeta(obj))
-    }
-
-    public open val typedValue: T? get() = value?.let { converter.metaToObject(it) }
-
-    public suspend fun readTyped(force: Boolean = false): T {
-        val meta = read(force)
-        return converter.metaToObject(meta)
-            ?: error("Meta $meta could not be converted by $converter")
-    }
-
-    public fun flowTyped(): Flow<T?> = flow().map { it?.let { converter.metaToObject(it) } }
-}
-
-/**
- * A type-safe wrapper for a read-write device property
- */
-public class TypedDeviceProperty<T : Any>(
-    private val property: DeviceProperty,
-    converter: MetaConverter<T>,
-) : TypedReadOnlyDeviceProperty<T>(property, converter), DeviceProperty {
-
-    override var value: Meta?
-        get() = property.value
-        set(arg) {
-            property.value = arg
-        }
-
-    public override var typedValue: T?
-        get() = value?.let { converter.metaToObject(it) }
-        set(arg) {
-            property.value = arg?.let { converter.objectToMeta(arg) }
-        }
-
-    override suspend fun write(item: Meta) {
-        property.write(item)
-    }
-
-    public suspend fun write(obj: T) {
-        property.write(converter.objectToMeta(obj))
-    }
-}

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/base/actionDelegates.kt

@@ -1,58 +0,0 @@
-package ru.mipt.npm.controls.base
-
-import ru.mipt.npm.controls.api.ActionDescriptor
-import space.kscience.dataforge.meta.Meta
-import space.kscience.dataforge.meta.MutableMeta
-import space.kscience.dataforge.values.Value
-import kotlin.properties.PropertyDelegateProvider
-import kotlin.properties.ReadOnlyProperty
-import kotlin.reflect.KProperty
-
-
-private fun <D : DeviceBase> D.provideAction(): ReadOnlyProperty<D, DeviceAction> =
-    ReadOnlyProperty { _: D, property: KProperty<*> ->
-        val name = property.name
-        return@ReadOnlyProperty actions[name]!!
-    }
-
-public typealias ActionDelegate = ReadOnlyProperty<DeviceBase, DeviceAction>
-
-private class ActionProvider<D : DeviceBase>(
-    val owner: D,
-    val descriptorBuilder: ActionDescriptor.() -> Unit = {},
-    val block: suspend (Meta?) -> Meta?,
-) : PropertyDelegateProvider<D, ActionDelegate> {
-    override operator fun provideDelegate(thisRef: D, property: KProperty<*>): ActionDelegate {
-        val name = property.name
-        owner.createAction(name, descriptorBuilder, block)
-        return owner.provideAction()
-    }
-}
-
-public fun DeviceBase.requesting(
-    descriptorBuilder: ActionDescriptor.() -> Unit = {},
-    action: suspend (Meta?) -> Meta?,
-): PropertyDelegateProvider<DeviceBase, ActionDelegate> = ActionProvider(this, descriptorBuilder, action)
-
-public fun <D : DeviceBase> D.requestingValue(
-    descriptorBuilder: ActionDescriptor.() -> Unit = {},
-    action: suspend (Meta?) -> Any?,
-): PropertyDelegateProvider<D, ActionDelegate> = ActionProvider(this, descriptorBuilder) {
-    val res = action(it)
-    Meta(Value.of(res))
-}
-
-public fun <D : DeviceBase> D.requestingMeta(
-    descriptorBuilder: ActionDescriptor.() -> Unit = {},
-    action: suspend MutableMeta.(Meta?) -> Unit,
-): PropertyDelegateProvider<D, ActionDelegate> = ActionProvider(this, descriptorBuilder) {
-    Meta { action(it) }
-}
-
-public fun DeviceBase.acting(
-    descriptorBuilder: ActionDescriptor.() -> Unit = {},
-    action: suspend (Meta?) -> Unit,
-): PropertyDelegateProvider<DeviceBase, ActionDelegate> = ActionProvider(this, descriptorBuilder) {
-    action(it)
-    null
-}

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/base/devicePropertyDelegates.kt

@@ -1,283 +0,0 @@
-package ru.mipt.npm.controls.base
-
-import ru.mipt.npm.controls.api.PropertyDescriptor
-import space.kscience.dataforge.meta.Meta
-import space.kscience.dataforge.meta.MutableMeta
-import space.kscience.dataforge.meta.boolean
-import space.kscience.dataforge.meta.double
-import space.kscience.dataforge.meta.transformations.MetaConverter
-import space.kscience.dataforge.values.Null
-import space.kscience.dataforge.values.Value
-import space.kscience.dataforge.values.asValue
-import kotlin.properties.PropertyDelegateProvider
-import kotlin.properties.ReadOnlyProperty
-import kotlin.reflect.KProperty
-
-private fun <D : DeviceBase> D.provideProperty(name: String): ReadOnlyProperty<D, ReadOnlyDeviceProperty> =
-    ReadOnlyProperty { _: D, _: KProperty<*> ->
-        return@ReadOnlyProperty properties.getValue(name)
-    }
-
-private fun <D : DeviceBase, T : Any> D.provideProperty(
-    name: String,
-    converter: MetaConverter<T>,
-): ReadOnlyProperty<D, TypedReadOnlyDeviceProperty<T>> =
-    ReadOnlyProperty { _: D, _: KProperty<*> ->
-        return@ReadOnlyProperty TypedReadOnlyDeviceProperty(properties.getValue(name), converter)
-    }
-
-
-public typealias ReadOnlyPropertyDelegate = ReadOnlyProperty<DeviceBase, ReadOnlyDeviceProperty>
-public typealias TypedReadOnlyPropertyDelegate<T> = ReadOnlyProperty<DeviceBase, TypedReadOnlyDeviceProperty<T>>
-
-private class ReadOnlyDevicePropertyProvider<D : DeviceBase>(
-    val owner: D,
-    val default: Meta?,
-    val descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    private val getter: suspend (Meta?) -> Meta,
-) : PropertyDelegateProvider<D, ReadOnlyPropertyDelegate> {
-
-    override operator fun provideDelegate(thisRef: D, property: KProperty<*>): ReadOnlyPropertyDelegate {
-        val name = property.name
-        owner.createReadOnlyProperty(name, default, descriptorBuilder, getter)
-        return owner.provideProperty(name)
-    }
-}
-
-private class TypedReadOnlyDevicePropertyProvider<D : DeviceBase, T : Any>(
-    val owner: D,
-    val default: Meta?,
-    val converter: MetaConverter<T>,
-    val descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    private val getter: suspend (Meta?) -> Meta,
-) : PropertyDelegateProvider<D, TypedReadOnlyPropertyDelegate<T>> {
-
-    override operator fun provideDelegate(thisRef: D, property: KProperty<*>): TypedReadOnlyPropertyDelegate<T> {
-        val name = property.name
-        owner.createReadOnlyProperty(name, default, descriptorBuilder, getter)
-        return owner.provideProperty(name, converter)
-    }
-}
-
-public fun DeviceBase.reading(
-    default: Meta? = null,
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    getter: suspend (Meta?) -> Meta,
-): PropertyDelegateProvider<DeviceBase, ReadOnlyPropertyDelegate> = ReadOnlyDevicePropertyProvider(
-    this,
-    default,
-    descriptorBuilder,
-    getter
-)
-
-public fun DeviceBase.readingValue(
-    default: Value? = null,
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    getter: suspend () -> Any?,
-): PropertyDelegateProvider<DeviceBase, ReadOnlyPropertyDelegate> = ReadOnlyDevicePropertyProvider(
-    this,
-    default?.let { Meta(it) },
-    descriptorBuilder,
-    getter = { Meta(Value.of(getter())) }
-)
-
-public fun DeviceBase.readingNumber(
-    default: Number? = null,
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    getter: suspend () -> Number,
-): PropertyDelegateProvider<DeviceBase, TypedReadOnlyPropertyDelegate<Number>> = TypedReadOnlyDevicePropertyProvider(
-    this,
-    default?.let { Meta(it.asValue()) },
-    MetaConverter.number,
-    descriptorBuilder,
-    getter = {
-        val number = getter()
-        Meta(number.asValue())
-    }
-)
-
-public fun DeviceBase.readingDouble(
-    default: Number? = null,
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    getter: suspend () -> Double,
-): PropertyDelegateProvider<DeviceBase, TypedReadOnlyPropertyDelegate<Double>> = TypedReadOnlyDevicePropertyProvider(
-    this,
-    default?.let { Meta(it.asValue()) },
-    MetaConverter.double,
-    descriptorBuilder,
-    getter = {
-        val number = getter()
-        Meta(number.asValue())
-    }
-)
-
-public fun DeviceBase.readingString(
-    default: String? = null,
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    getter: suspend () -> String,
-): PropertyDelegateProvider<DeviceBase, TypedReadOnlyPropertyDelegate<String>> = TypedReadOnlyDevicePropertyProvider(
-    this,
-    default?.let { Meta(it.asValue()) },
-    MetaConverter.string,
-    descriptorBuilder,
-    getter = {
-        val number = getter()
-        Meta(number.asValue())
-    }
-)
-
-public fun DeviceBase.readingBoolean(
-    default: Boolean? = null,
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    getter: suspend () -> Boolean,
-): PropertyDelegateProvider<DeviceBase, TypedReadOnlyPropertyDelegate<Boolean>> = TypedReadOnlyDevicePropertyProvider(
-    this,
-    default?.let { Meta(it.asValue()) },
-    MetaConverter.boolean,
-    descriptorBuilder,
-    getter = {
-        val boolean = getter()
-        Meta(boolean.asValue())
-    }
-)
-
-public fun DeviceBase.readingMeta(
-    default: Meta? = null,
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    getter: suspend MutableMeta.() -> Unit,
-): PropertyDelegateProvider<DeviceBase, TypedReadOnlyPropertyDelegate<Meta>> = TypedReadOnlyDevicePropertyProvider(
-    this,
-    default,
-    MetaConverter.meta,
-    descriptorBuilder,
-    getter = {
-        Meta { getter() }
-    }
-)
-
-private fun DeviceBase.provideMutableProperty(name: String): ReadOnlyProperty<DeviceBase, DeviceProperty> =
-    ReadOnlyProperty { _: DeviceBase, _: KProperty<*> ->
-        return@ReadOnlyProperty properties[name] as DeviceProperty
-    }
-
-private fun <T : Any> DeviceBase.provideMutableProperty(
-    name: String,
-    converter: MetaConverter<T>,
-): ReadOnlyProperty<DeviceBase, TypedDeviceProperty<T>> =
-    ReadOnlyProperty { _: DeviceBase, _: KProperty<*> ->
-        return@ReadOnlyProperty TypedDeviceProperty(properties[name] as DeviceProperty, converter)
-    }
-
-public typealias PropertyDelegate = ReadOnlyProperty<DeviceBase, DeviceProperty>
-public typealias TypedPropertyDelegate<T> = ReadOnlyProperty<DeviceBase, TypedDeviceProperty<T>>
-
-private class DevicePropertyProvider<D : DeviceBase>(
-    val owner: D,
-    val default: Meta?,
-    val descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    private val getter: suspend (Meta?) -> Meta,
-    private val setter: suspend (oldValue: Meta?, newValue: Meta) -> Meta?,
-) : PropertyDelegateProvider<D, PropertyDelegate> {
-
-    override operator fun provideDelegate(thisRef: D, property: KProperty<*>): PropertyDelegate {
-        val name = property.name
-        owner.createMutableProperty(name, default, descriptorBuilder, getter, setter)
-        return owner.provideMutableProperty(name)
-    }
-}
-
-private class TypedDevicePropertyProvider<D : DeviceBase, T : Any>(
-    val owner: D,
-    val default: Meta?,
-    val converter: MetaConverter<T>,
-    val descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    private val getter: suspend (Meta?) -> Meta,
-    private val setter: suspend (oldValue: Meta?, newValue: Meta) -> Meta?,
-) : PropertyDelegateProvider<D, TypedPropertyDelegate<T>> {
-
-    override operator fun provideDelegate(thisRef: D, property: KProperty<*>): TypedPropertyDelegate<T> {
-        val name = property.name
-        owner.createMutableProperty(name, default, descriptorBuilder, getter, setter)
-        return owner.provideMutableProperty(name, converter)
-    }
-}
-
-public fun DeviceBase.writing(
-    default: Meta? = null,
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    getter: suspend (Meta?) -> Meta,
-    setter: suspend (oldValue: Meta?, newValue: Meta) -> Meta?,
-): PropertyDelegateProvider<DeviceBase, PropertyDelegate> = DevicePropertyProvider(
-    this,
-    default,
-    descriptorBuilder,
-    getter,
-    setter
-)
-
-public fun DeviceBase.writingVirtual(
-    default: Meta,
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-): PropertyDelegateProvider<DeviceBase, PropertyDelegate> = writing(
-    default,
-    descriptorBuilder,
-    getter = { it ?: default },
-    setter = { _, newItem -> newItem }
-)
-
-public fun DeviceBase.writingVirtual(
-    default: Value,
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-): PropertyDelegateProvider<DeviceBase, PropertyDelegate> = writing(
-    Meta(default),
-    descriptorBuilder,
-    getter = { it ?: Meta(default) },
-    setter = { _, newItem -> newItem }
-)
-
-public fun <D : DeviceBase> D.writingDouble(
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    getter: suspend (Double) -> Double,
-    setter: suspend (oldValue: Double?, newValue: Double) -> Double?,
-): PropertyDelegateProvider<D, TypedPropertyDelegate<Double>> {
-    val innerGetter: suspend (Meta?) -> Meta = {
-        Meta(getter(it.double ?: Double.NaN).asValue())
-    }
-
-    val innerSetter: suspend (oldValue: Meta?, newValue: Meta) -> Meta? = { oldValue, newValue ->
-        setter(oldValue.double, newValue.double ?: Double.NaN)?.asMeta()
-    }
-
-    return TypedDevicePropertyProvider(
-        this,
-        Meta(Double.NaN.asValue()),
-        MetaConverter.double,
-        descriptorBuilder,
-        innerGetter,
-        innerSetter
-    )
-}
-
-public fun <D : DeviceBase> D.writingBoolean(
-    descriptorBuilder: PropertyDescriptor.() -> Unit = {},
-    getter: suspend (Boolean?) -> Boolean,
-    setter: suspend (oldValue: Boolean?, newValue: Boolean) -> Boolean?,
-): PropertyDelegateProvider<D, TypedPropertyDelegate<Boolean>> {
-    val innerGetter: suspend (Meta?) -> Meta = {
-        Meta(getter(it.boolean).asValue())
-    }
-
-    val innerSetter: suspend (oldValue: Meta?, newValue: Meta) -> Meta? = { oldValue, newValue ->
-        setter(oldValue.boolean, newValue.boolean ?: error("Can't convert $newValue to boolean"))?.asValue()
-            ?.let { Meta(it) }
-    }
-
-    return TypedDevicePropertyProvider(
-        this,
-        Meta(Null),
-        MetaConverter.boolean,
-        descriptorBuilder,
-        innerGetter,
-        innerSetter
-    )
-}

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/spec/DeviceBase.kt

@@ -1,4 +1,4 @@
-package ru.mipt.npm.controls.properties
+package ru.mipt.npm.controls.spec
 
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.SupervisorJob
@@ -13,24 +13,15 @@ import space.kscience.dataforge.context.Global
 import space.kscience.dataforge.meta.Meta
 import kotlin.coroutines.CoroutineContext
 
-/**
+
- * A device generated from specification
- * @param D recursive self-type for properties and actions
- */
 @OptIn(InternalDeviceAPI::class)
-public open class DeviceBySpec<D : DeviceBySpec<D>>(
+public abstract class DeviceBase<D : DeviceBase<D>>(
-    public val spec: DeviceSpec<D>,
+    override val context: Context = Global,
-    context: Context = Global,
+    public val meta: Meta = Meta.EMPTY
-    meta: Meta = Meta.EMPTY
 ) : Device {
-    override var context: Context = context
-        internal set
 
-    public var meta: Meta = meta
+    public abstract val properties: Map<String, DevicePropertySpec<D, *>> //get() = spec.properties
-        internal set
+    public abstract val actions: Map<String, DeviceActionSpec<D, *, *>> //get() = spec.actions
-
-    public val properties: Map<String, DevicePropertySpec<D, *>> get() = spec.properties
-    public val actions: Map<String, DeviceActionSpec<D, *, *>> get() = spec.actions
 
     override val propertyDescriptors: Collection<PropertyDescriptor>
         get() = properties.values.map { it.descriptor }
@@ -68,6 +59,13 @@ public open class DeviceBySpec<D : DeviceBySpec<D>>(
         }
     }
 
+    /**
+     * Update logical state using given [spec] and its convertor
+     */
+    protected suspend fun <T> updateLogical(spec: DevicePropertySpec<D, T>, value: T) {
+        updateLogical(spec.name, spec.converter.objectToMeta(value))
+    }
+
     /**
      * Force read physical value and push an update if it is changed. It does not matter if logical state is present.
      * The logical state is updated after read
@@ -98,7 +96,7 @@ public open class DeviceBySpec<D : DeviceBySpec<D>>(
     }
 
     override suspend fun execute(action: String, argument: Meta?): Meta? =
-        actions[action]?.executeMeta(self, argument)
+        actions[action]?.executeWithMeta(self, argument)
 
     /**
      * Read typed value and update/push event if needed
@@ -123,19 +121,20 @@ public open class DeviceBySpec<D : DeviceBySpec<D>>(
         }
     }
 
-    override fun close() {
+    public suspend operator fun <I, O> DeviceActionSpec<D, I, O>.invoke(input: I? = null): O? = execute(self, input)
-        with(spec) { self.onShutdown() }
+
-        super.close()
-    }
 }
 
-public suspend fun <D : DeviceBySpec<D>, T : Any> D.read(
+/**
-    propertySpec: DevicePropertySpec<D, T>
+ * A device generated from specification
-): T = propertySpec.read()
+ * @param D recursive self-type for properties and actions
-
+ */
-public fun <D : DeviceBySpec<D>, T> D.write(
+public open class DeviceBySpec<D : DeviceBySpec<D>>(
-    propertySpec: WritableDevicePropertySpec<D, T>,
+    public val spec: DeviceSpec<D>,
-    value: T
+    context: Context = Global,
-): Job = launch {
+    meta: Meta = Meta.EMPTY
-    propertySpec.write(value)
+) : DeviceBase<D>(context, meta) {
+    override val properties: Map<String, DevicePropertySpec<D, *>> get() = spec.properties
+    override val actions: Map<String, DeviceActionSpec<D, *, *>> get() = spec.actions
 }
+

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/spec/DevicePropertySpec.kt

@@ -1,7 +1,14 @@
-package ru.mipt.npm.controls.properties
+package ru.mipt.npm.controls.spec
 
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.filterIsInstance
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.launch
 import ru.mipt.npm.controls.api.ActionDescriptor
 import ru.mipt.npm.controls.api.Device
+import ru.mipt.npm.controls.api.PropertyChangedMessage
 import ru.mipt.npm.controls.api.PropertyDescriptor
 import space.kscience.dataforge.meta.Meta
 import space.kscience.dataforge.meta.transformations.MetaConverter
@@ -75,7 +82,7 @@ public interface DeviceActionSpec<in D : Device, I, O> {
     public suspend fun execute(device: D, input: I?): O?
 }
 
-public suspend fun <D : Device, I, O> DeviceActionSpec<D, I, O>.executeMeta(
+public suspend fun <D : Device, I, O> DeviceActionSpec<D, I, O>.executeWithMeta(
     device: D,
     item: Meta?
 ): Meta? {
@@ -83,3 +90,40 @@ public suspend fun <D : Device, I, O> DeviceActionSpec<D, I, O>.executeMeta(
     val res = execute(device, arg)
     return res?.let { outputConverter.objectToMeta(res) }
 }
+
+
+public suspend fun <D : DeviceBase<D>, T : Any> D.read(
+    propertySpec: DevicePropertySpec<D, T>
+): T = propertySpec.read()
+
+public suspend fun <D : Device, T : Any> D.read(
+    propertySpec: DevicePropertySpec<D, T>
+): T = propertySpec.converter.metaToObject(readProperty(propertySpec.name))
+    ?: error("Property meta converter returned null")
+
+public fun <D : Device, T> D.write(
+    propertySpec: WritableDevicePropertySpec<D, T>,
+    value: T
+): Job = launch {
+    writeProperty(propertySpec.name, propertySpec.converter.objectToMeta(value))
+}
+
+public fun <D : DeviceBase<D>, T> D.write(
+    propertySpec: WritableDevicePropertySpec<D, T>,
+    value: T
+): Job = launch {
+    propertySpec.write(value)
+}
+
+/**
+ * A type safe property change listener
+ */
+public fun <D : Device, T> Device.onPropertyChange(
+    spec: DevicePropertySpec<D, T>,
+    callback: suspend PropertyChangedMessage.(T?) -> Unit
+): Job = messageFlow
+    .filterIsInstance<PropertyChangedMessage>()
+    .filter { it.property == spec.name }
+    .onEach { change ->
+        change.callback(spec.converter.metaToObject(change.value))
+    }.launchIn(this)

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/spec/DeviceSpec.kt

@@ -1,10 +1,9 @@
-package ru.mipt.npm.controls.properties
+package ru.mipt.npm.controls.spec
 
 import kotlinx.coroutines.withContext
 import ru.mipt.npm.controls.api.ActionDescriptor
+import ru.mipt.npm.controls.api.Device
 import ru.mipt.npm.controls.api.PropertyDescriptor
-import space.kscience.dataforge.context.Context
-import space.kscience.dataforge.context.Factory
 import space.kscience.dataforge.meta.Meta
 import space.kscience.dataforge.meta.transformations.MetaConverter
 import kotlin.properties.PropertyDelegateProvider
@@ -14,9 +13,7 @@ import kotlin.reflect.KProperty
 import kotlin.reflect.KProperty1
 
 @OptIn(InternalDeviceAPI::class)
-public abstract class DeviceSpec<D : DeviceBySpec<D>>(
+public abstract class DeviceSpec<D : Device> {
-    private val buildDevice: () -> D
-) : Factory<D> {
     private val _properties = HashMap<String, DevicePropertySpec<D, *>>()
     public val properties: Map<String, DevicePropertySpec<D, *>> get() = _properties
 
@@ -75,8 +72,8 @@ public abstract class DeviceSpec<D : DeviceBySpec<D>>(
 
     public fun <T : Any> property(
         converter: MetaConverter<T>,
-        name: String? = null,
         descriptorBuilder: PropertyDescriptor.() -> Unit = {},
+        name: String? = null,
         read: suspend D.() -> T
     ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, DevicePropertySpec<D, T>>> =
         PropertyDelegateProvider { _: DeviceSpec<D>, property ->
@@ -96,8 +93,8 @@ public abstract class DeviceSpec<D : DeviceBySpec<D>>(
 
     public fun <T : Any> property(
         converter: MetaConverter<T>,
-        name: String? = null,
         descriptorBuilder: PropertyDescriptor.() -> Unit = {},
+        name: String? = null,
         read: suspend D.() -> T,
         write: suspend D.(T) -> Unit
     ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, WritableDevicePropertySpec<D, T>>> =
@@ -129,8 +126,8 @@ public abstract class DeviceSpec<D : DeviceBySpec<D>>(
     public fun <I : Any, O : Any> action(
         inputConverter: MetaConverter<I>,
         outputConverter: MetaConverter<O>,
-        name: String? = null,
         descriptorBuilder: ActionDescriptor.() -> Unit = {},
+        name: String? = null,
         execute: suspend D.(I?) -> O?
     ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, DeviceActionSpec<D, I, O>>> =
         PropertyDelegateProvider { _: DeviceSpec<D>, property ->
@@ -153,19 +150,35 @@ public abstract class DeviceSpec<D : DeviceBySpec<D>>(
         }
 
     /**
-     * The function is executed right after device initialization is finished
+     * An action that takes [Meta] and returns [Meta]. No conversions are done
      */
-    public open fun D.onStartup() {}
+    public fun metaAction(
+        descriptorBuilder: ActionDescriptor.() -> Unit = {},
+        name: String? = null,
+        execute: suspend D.(Meta?) -> Meta?
+    ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, DeviceActionSpec<D, Meta, Meta>>> = action(
+        MetaConverter.Companion.meta,
+        MetaConverter.Companion.meta,
+        descriptorBuilder,
+        name
+    ){
+        execute(it)
+    }
 
     /**
-     * The function is executed before device is shut down
+     * An action that takes no parameters and returns no values
      */
-    public open fun D.onShutdown() {}
+    public fun unitAction(
-
+        descriptorBuilder: ActionDescriptor.() -> Unit = {},
-
+        name: String? = null,
-    override fun invoke(meta: Meta, context: Context): D = buildDevice().apply {
+        execute: suspend D.() -> Unit
-        this.context = context
+    ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, DeviceActionSpec<D, Meta, Meta>>> = action(
-        this.meta = meta
+        MetaConverter.Companion.meta,
-        onStartup()
+        MetaConverter.Companion.meta,
+        descriptorBuilder,
+        name
+    ){
+        execute()
+        null
     }
 }

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/spec/deviceExtensions.kt

@@ -1,4 +1,4 @@
-package ru.mipt.npm.controls.properties
+package ru.mipt.npm.controls.spec
 
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.Flow
@@ -14,7 +14,7 @@ import kotlin.time.Duration
  *
  * The flow is canceled when the device scope is canceled
  */
-public fun <D : DeviceBySpec<D>, R> D.readRecurring(interval: Duration, reader: suspend D.() -> R): Flow<R> = flow {
+public fun <D : DeviceBase<D>, R> D.readRecurring(interval: Duration, reader: suspend D.() -> R): Flow<R> = flow {
     while (isActive) {
         kotlinx.coroutines.delay(interval)
         emit(reader())
@@ -24,7 +24,7 @@ public fun <D : DeviceBySpec<D>, R> D.readRecurring(interval: Duration, reader:
 /**
  * Do a recurring task on a device. The task could
  */
-public fun <D : DeviceBySpec<D>> D.doRecurring(interval: Duration, task: suspend D.() -> Unit): Job = launch {
+public fun <D : DeviceBase<D>> D.doRecurring(interval: Duration, task: suspend D.() -> Unit): Job = launch {
     while (isActive) {
         kotlinx.coroutines.delay(interval)
         task()

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/spec/misc.kt

@@ -1,4 +1,4 @@
-package ru.mipt.npm.controls.base
+package ru.mipt.npm.controls.spec
 
 import space.kscience.dataforge.meta.Meta
 import space.kscience.dataforge.meta.double

controls-core/src/commonMain/kotlin/ru/mipt/npm/controls/spec/propertySpecDelegates.kt

@@ -1,4 +1,4 @@
-package ru.mipt.npm.controls.properties
+package ru.mipt.npm.controls.spec
 
 import ru.mipt.npm.controls.api.PropertyDescriptor
 import ru.mipt.npm.controls.api.metaDescriptor
@@ -10,19 +10,19 @@ import kotlin.properties.ReadOnlyProperty
 
 //read only delegates
 
-public fun <D : DeviceBySpec<D>> DeviceSpec<D>.booleanProperty(
+public fun <D : DeviceBase<D>> DeviceSpec<D>.booleanProperty(
-    name: String? = null,
     descriptorBuilder: PropertyDescriptor.() -> Unit = {},
+    name: String? = null,
     read: suspend D.() -> Boolean
 ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, DevicePropertySpec<D, Boolean>>> = property(
     MetaConverter.boolean,
-    name,
     {
         metaDescriptor {
             type(ValueType.BOOLEAN)
         }
         descriptorBuilder()
     },
+    name,
     read
 )
 
@@ -35,110 +35,110 @@ private inline fun numberDescriptor(
     descriptorBuilder()
 }
 
-public fun <D : DeviceBySpec<D>> DeviceSpec<D>.numberProperty(
+public fun <D : DeviceBase<D>> DeviceSpec<D>.numberProperty(
     name: String? = null,
     descriptorBuilder: PropertyDescriptor.() -> Unit = {},
     read: suspend D.() -> Number
 ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, DevicePropertySpec<D, Number>>> = property(
     MetaConverter.number,
-    name,
     numberDescriptor(descriptorBuilder),
+    name,
     read
 )
 
-public fun <D : DeviceBySpec<D>> DeviceSpec<D>.doubleProperty(
+public fun <D : DeviceBase<D>> DeviceSpec<D>.doubleProperty(
-    name: String? = null,
     descriptorBuilder: PropertyDescriptor.() -> Unit = {},
+    name: String? = null,
     read: suspend D.() -> Double
 ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, DevicePropertySpec<D, Double>>> = property(
     MetaConverter.double,
-    name,
     numberDescriptor(descriptorBuilder),
+    name,
     read
 )
 
-public fun <D : DeviceBySpec<D>> DeviceSpec<D>.stringProperty(
+public fun <D : DeviceBase<D>> DeviceSpec<D>.stringProperty(
-    name: String? = null,
     descriptorBuilder: PropertyDescriptor.() -> Unit = {},
+    name: String? = null,
     read: suspend D.() -> String
 ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, DevicePropertySpec<D, String>>> = property(
     MetaConverter.string,
-    name,
     {
         metaDescriptor {
             type(ValueType.STRING)
         }
         descriptorBuilder()
     },
+    name,
     read
 )
 
-public fun <D : DeviceBySpec<D>> DeviceSpec<D>.metaProperty(
+public fun <D : DeviceBase<D>> DeviceSpec<D>.metaProperty(
-    name: String? = null,
     descriptorBuilder: PropertyDescriptor.() -> Unit = {},
+    name: String? = null,
     read: suspend D.() -> Meta
 ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, DevicePropertySpec<D, Meta>>> = property(
     MetaConverter.meta,
-    name,
     {
         metaDescriptor {
             type(ValueType.STRING)
         }
         descriptorBuilder()
     },
+    name,
     read
 )
 
 //read-write delegates
 
-public fun <D : DeviceBySpec<D>> DeviceSpec<D>.booleanProperty(
+public fun <D : DeviceBase<D>> DeviceSpec<D>.booleanProperty(
-    name: String? = null,
     descriptorBuilder: PropertyDescriptor.() -> Unit = {},
+    name: String? = null,
     read: suspend D.() -> Boolean,
     write: suspend D.(Boolean) -> Unit
 ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, WritableDevicePropertySpec<D, Boolean>>> =
     property(
         MetaConverter.boolean,
-        name,
         {
             metaDescriptor {
                 type(ValueType.BOOLEAN)
             }
             descriptorBuilder()
         },
+        name,
         read,
         write
     )
 
 
-public fun <D : DeviceBySpec<D>> DeviceSpec<D>.numberProperty(
+public fun <D : DeviceBase<D>> DeviceSpec<D>.numberProperty(
-    name: String? = null,
     descriptorBuilder: PropertyDescriptor.() -> Unit = {},
+    name: String? = null,
     read: suspend D.() -> Number,
     write: suspend D.(Number) -> Unit
 ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, WritableDevicePropertySpec<D, Number>>> =
-    property(MetaConverter.number, name, numberDescriptor(descriptorBuilder), read, write)
+    property(MetaConverter.number, numberDescriptor(descriptorBuilder), name, read, write)
 
-public fun <D : DeviceBySpec<D>> DeviceSpec<D>.doubleProperty(
+public fun <D : DeviceBase<D>> DeviceSpec<D>.doubleProperty(
-    name: String? = null,
     descriptorBuilder: PropertyDescriptor.() -> Unit = {},
+    name: String? = null,
     read: suspend D.() -> Double,
     write: suspend D.(Double) -> Unit
 ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, WritableDevicePropertySpec<D, Double>>> =
-    property(MetaConverter.double, name, numberDescriptor(descriptorBuilder), read, write)
+    property(MetaConverter.double, numberDescriptor(descriptorBuilder), name, read, write)
 
-public fun <D : DeviceBySpec<D>> DeviceSpec<D>.stringProperty(
+public fun <D : DeviceBase<D>> DeviceSpec<D>.stringProperty(
-    name: String? = null,
     descriptorBuilder: PropertyDescriptor.() -> Unit = {},
+    name: String? = null,
     read: suspend D.() -> String,
     write: suspend D.(String) -> Unit
 ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, WritableDevicePropertySpec<D, String>>> =
-    property(MetaConverter.string, name, descriptorBuilder, read, write)
+    property(MetaConverter.string, descriptorBuilder, name, read, write)
 
-public fun <D : DeviceBySpec<D>> DeviceSpec<D>.metaProperty(
+public fun <D : DeviceBase<D>> DeviceSpec<D>.metaProperty(
-    name: String? = null,
     descriptorBuilder: PropertyDescriptor.() -> Unit = {},
+    name: String? = null,
     read: suspend D.() -> Meta,
     write: suspend D.(Meta) -> Unit
 ): PropertyDelegateProvider<DeviceSpec<D>, ReadOnlyProperty<DeviceSpec<D>, WritableDevicePropertySpec<D, Meta>>> =
-    property(MetaConverter.meta, name, descriptorBuilder, read, write)
+    property(MetaConverter.meta, descriptorBuilder, name, read, write)

controls-core/src/jvmMain/kotlin/ru/mipt/npm/controls/properties/delegates.kt

@@ -1,89 +0,0 @@
-package ru.mipt.npm.controls.controllers
-
-import kotlinx.coroutines.runBlocking
-import ru.mipt.npm.controls.base.*
-import space.kscience.dataforge.meta.Meta
-import space.kscience.dataforge.meta.transformations.MetaConverter
-import kotlin.properties.ReadOnlyProperty
-import kotlin.properties.ReadWriteProperty
-import kotlin.reflect.KProperty
-import kotlin.time.Duration
-
-/**
- * Blocking read of the value
- */
-public operator fun ReadOnlyDeviceProperty.getValue(thisRef: Any?, property: KProperty<*>): Meta =
-    runBlocking(scope.coroutineContext) {
-        read()
-    }
-
-public operator fun <T: Any> TypedReadOnlyDeviceProperty<T>.getValue(thisRef: Any?, property: KProperty<*>): T =
-    runBlocking(scope.coroutineContext) {
-        readTyped()
-    }
-
-public operator fun DeviceProperty.setValue(thisRef: Any?, property: KProperty<*>, value: Meta) {
-    this.value = value
-}
-
-public operator fun  <T: Any> TypedDeviceProperty<T>.setValue(thisRef: Any?, property: KProperty<*>, value: T) {
-    this.typedValue = value
-}
-
-public fun <T : Any> ReadOnlyDeviceProperty.convert(
-    metaConverter: MetaConverter<T>,
-    forceRead: Boolean,
-): ReadOnlyProperty<Any?, T> {
-    return ReadOnlyProperty { _, _ ->
-        runBlocking(scope.coroutineContext) {
-            val meta = read(forceRead)
-            metaConverter.metaToObject(meta)?: error("Meta $meta could not be converted by $metaConverter")
-        }
-    }
-}
-
-public fun <T : Any> DeviceProperty.convert(
-    metaConverter: MetaConverter<T>,
-    forceRead: Boolean,
-): ReadWriteProperty<Any?, T> {
-    return object : ReadWriteProperty<Any?, T> {
-        override fun getValue(thisRef: Any?, property: KProperty<*>): T = runBlocking(scope.coroutineContext) {
-            val meta = read(forceRead)
-            metaConverter.metaToObject(meta)?: error("Meta $meta could not be converted by $metaConverter")
-        }
-
-        override fun setValue(thisRef: Any?, property: KProperty<*>, value: T) {
-            this@convert.setValue(thisRef, property, value.let { metaConverter.objectToMeta(it) })
-        }
-    }
-}
-
-public fun ReadOnlyDeviceProperty.double(forceRead: Boolean = false): ReadOnlyProperty<Any?, Double> =
-    convert(MetaConverter.double, forceRead)
-
-public fun DeviceProperty.double(forceRead: Boolean = false): ReadWriteProperty<Any?, Double> =
-    convert(MetaConverter.double, forceRead)
-
-public fun ReadOnlyDeviceProperty.int(forceRead: Boolean = false): ReadOnlyProperty<Any?, Int> =
-    convert(MetaConverter.int, forceRead)
-
-public fun DeviceProperty.int(forceRead: Boolean = false): ReadWriteProperty<Any?, Int> =
-    convert(MetaConverter.int, forceRead)
-
-public fun ReadOnlyDeviceProperty.string(forceRead: Boolean = false): ReadOnlyProperty<Any?, String> =
-    convert(MetaConverter.string, forceRead)
-
-public fun DeviceProperty.string(forceRead: Boolean = false): ReadWriteProperty<Any?, String> =
-    convert(MetaConverter.string, forceRead)
-
-public fun ReadOnlyDeviceProperty.boolean(forceRead: Boolean = false): ReadOnlyProperty<Any?, Boolean> =
-    convert(MetaConverter.boolean, forceRead)
-
-public fun DeviceProperty.boolean(forceRead: Boolean = false): ReadWriteProperty<Any?, Boolean> =
-    convert(MetaConverter.boolean, forceRead)
-
-public fun ReadOnlyDeviceProperty.duration(forceRead: Boolean = false): ReadOnlyProperty<Any?, Duration> =
-    convert(DurationConverter, forceRead)
-
-public fun DeviceProperty.duration(forceRead: Boolean = false): ReadWriteProperty<Any?, Duration> =
-    convert(DurationConverter, forceRead)

controls-core/src/jvmMain/kotlin/ru/mipt/npm/controls/properties/getDeviceProperty.kt

@@ -1,10 +0,0 @@
-package ru.mipt.npm.controls.properties
-
-import kotlinx.coroutines.runBlocking
-
-/**
- * Blocking property get call
- */
-public operator fun <D : DeviceBySpec<D>, T : Any> D.get(
-    propertySpec: DevicePropertySpec<D, T>
-): T = runBlocking { read(propertySpec) }

controls-core/src/jvmMain/kotlin/ru/mipt/npm/controls/spec/getDeviceProperty.kt

@@ -0,0 +1,10 @@
+package ru.mipt.npm.controls.spec
+
+import kotlinx.coroutines.runBlocking
+
+/**
+ * Blocking property get call
+ */
+public operator fun <D : DeviceBase<D>, T : Any> D.get(
+    propertySpec: DevicePropertySpec<D, T>
+): T = runBlocking { read(propertySpec) }

controls-opcua/src/main/kotlin/ru/mipt/npm/controls/opcua/client/MiloDeviceBySpec.kt

@@ -4,8 +4,8 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 import org.eclipse.milo.opcua.sdk.client.OpcUaClient
 import org.eclipse.milo.opcua.stack.core.types.builtin.NodeId
-import ru.mipt.npm.controls.properties.DeviceBySpec
+import ru.mipt.npm.controls.spec.DeviceBySpec
-import ru.mipt.npm.controls.properties.DeviceSpec
+import ru.mipt.npm.controls.spec.DeviceSpec
 import space.kscience.dataforge.context.Context
 import space.kscience.dataforge.context.Global
 import space.kscience.dataforge.meta.Meta

demo/build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
 }
 
 
-repositories{
+repositories {
     mavenCentral()
     jcenter()
     maven("https://repo.kotlin.link")
@@ -15,7 +15,7 @@ repositories{
 val ktorVersion: String by rootProject.extra
 val rsocketVersion: String by rootProject.extra
 
-dependencies{
+dependencies {
     implementation(projects.controlsCore)
     //implementation(projects.controlsServer)
     implementation(projects.magix.magixServer)
@@ -34,15 +34,15 @@ dependencies{
 tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
     kotlinOptions {
         jvmTarget = "11"
-        freeCompilerArgs = freeCompilerArgs + "-Xjvm-default=all"
+        freeCompilerArgs = freeCompilerArgs + listOf("-Xjvm-default=all", "-Xopt-in=kotlin.RequiresOptIn")
     }
 }
 
-javafx{
+javafx {
     version = "14"
     modules("javafx.controls")
 }
 
-application{
+application {
     mainClass.set("ru.mipt.npm.controls.demo.DemoControllerViewKt")
 }

demo/src/main/kotlin/ru/mipt/npm/controls/demo/DemoDevice.kt

@@ -1,22 +1,47 @@
 package ru.mipt.npm.controls.demo
 
 import kotlinx.coroutines.launch
-import ru.mipt.npm.controls.properties.*
+import ru.mipt.npm.controls.api.metaDescriptor
+import ru.mipt.npm.controls.spec.*
+import space.kscience.dataforge.context.Context
+import space.kscience.dataforge.context.Factory
 import space.kscience.dataforge.meta.Meta
+import space.kscience.dataforge.meta.descriptors.value
 import space.kscience.dataforge.meta.transformations.MetaConverter
+import space.kscience.dataforge.values.ValueType
 import java.time.Instant
 import kotlin.time.Duration
 import kotlin.time.ExperimentalTime
 
 
-class DemoDevice : DeviceBySpec<DemoDevice>(DemoDevice) {
+class DemoDevice(context: Context, meta: Meta) : DeviceBySpec<DemoDevice>(DemoDevice, context, meta) {
     private var timeScaleState = 5000.0
     private var sinScaleState = 1.0
     private var cosScaleState = 1.0
 
-    companion object : DeviceSpec<DemoDevice>(::DemoDevice) {
+    @OptIn(ExperimentalTime::class)
+    override suspend fun open() {
+        super.open()
+        launch {
+            sinScale.read()
+            cosScale.read()
+            timeScale.read()
+        }
+        doRecurring(Duration.milliseconds(50)) {
+            coordinates.read()
+        }
+    }
+
+
+    companion object : DeviceSpec<DemoDevice>(), Factory<DemoDevice> {
         // register virtual properties based on actual object state
-        val timeScale by property(MetaConverter.double, DemoDevice::timeScaleState)
+        val timeScale by property(MetaConverter.double, DemoDevice::timeScaleState) {
+            metaDescriptor {
+                type(ValueType.NUMBER)
+            }
+            info = "Real to virtual time scale"
+        }
+
         val sinScale by property(MetaConverter.double, DemoDevice::sinScaleState)
         val cosScale by property(MetaConverter.double, DemoDevice::cosScaleState)
 
@@ -30,7 +55,13 @@ class DemoDevice : DeviceBySpec<DemoDevice>(DemoDevice) {
             kotlin.math.cos(time.toEpochMilli().toDouble() / timeScaleState) * sinScaleState
         }
 
-        val coordinates by metaProperty {
+        val coordinates by metaProperty(
+            descriptorBuilder = {
+                metaDescriptor {
+                    value("time", ValueType.NUMBER)
+                }
+            }
+        ) {
             Meta {
                 val time = Instant.now()
                 "time" put time.toEpochMilli()
@@ -46,15 +77,6 @@ class DemoDevice : DeviceBySpec<DemoDevice>(DemoDevice) {
             null
         }
 
-        @OptIn(ExperimentalTime::class)
+        override fun invoke(meta: Meta, context: Context): DemoDevice = DemoDevice(context, meta)
-        override fun DemoDevice.onStartup() {
-            launch {
-                sinScale.read()
-                cosScale.read()
-            }
-            doRecurring(Duration.milliseconds(50)){
-                coordinates.read()
-            }
-        }
     }
 }

motors/src/main/kotlin/ru/mipt/npm/devices/pimotionmaster/PiMotionMasterApp.kt

@@ -13,6 +13,9 @@ import kotlinx.coroutines.Job
 import kotlinx.coroutines.launch
 import ru.mipt.npm.controls.controllers.DeviceManager
 import ru.mipt.npm.controls.controllers.installing
+import ru.mipt.npm.devices.pimotionmaster.PiMotionMasterDevice.Axis.Companion.maxPosition
+import ru.mipt.npm.devices.pimotionmaster.PiMotionMasterDevice.Axis.Companion.minPosition
+import ru.mipt.npm.devices.pimotionmaster.PiMotionMasterDevice.Axis.Companion.position
 import space.kscience.dataforge.context.Global
 import space.kscience.dataforge.context.fetch
 import tornadofx.*
@@ -40,28 +43,30 @@ fun VBox.piMotionMasterAxis(
     alignment = Pos.CENTER
     label(axisName)
     coroutineScope.launch {
-        val min = axis.minPosition.readTyped(true)
+        with(axis) {
-        val max = axis.maxPosition.readTyped(true)
+            val min = minPosition.read()
-        val positionProperty = axis.position.fxProperty(axis)
+            val max = maxPosition.read()
-        val startPosition = axis.position.readTyped(true)
+            val positionProperty = fxProperty(position)
-        runLater {
+            val startPosition = position.read()
-            vbox {
+            runLater {
-                hgrow = Priority.ALWAYS
+                vbox {
-                slider(min..max, startPosition) {
+                    hgrow = Priority.ALWAYS
-                    minWidth = 300.0
+                    slider(min..max, startPosition) {
-                    isShowTickLabels = true
+                        minWidth = 300.0
-                    isShowTickMarks = true
+                        isShowTickLabels = true
-                    minorTickCount = 10
+                        isShowTickMarks = true
-                    majorTickUnit = 1.0
+                        minorTickCount = 10
-                    valueProperty().onChange {
+                        majorTickUnit = 1.0
-                        coroutineScope.launch {
+                        valueProperty().onChange {
-                            axis.move(value)
+                            coroutineScope.launch {
+                                axis.move(value)
+                            }
                         }
                     }
-                }
+                    slider(min..max) {
-                slider(min..max) {
+                        isDisable = true
-                    isDisable = true
+                        valueProperty().bind(positionProperty)
-                    valueProperty().bind(positionProperty)
+                    }
                 }
             }
         }
@@ -82,7 +87,7 @@ class PiMotionMasterView : View() {
     private val controller: PiMotionMasterController by inject()
     val device = controller.motionMaster
 
-    private val connectedProperty: ReadOnlyProperty<Boolean> = device.connected.fxProperty(device)
+    private val connectedProperty: ReadOnlyProperty<Boolean> = device.fxProperty(PiMotionMasterDevice.connected)
     private val debugServerJobProperty = SimpleObjectProperty<Job>()
     private val debugServerStarted = debugServerJobProperty.booleanBinding { it != null }
     //private val axisList = FXCollections.observableArrayList<Map.Entry<String, PiMotionMasterDevice.Axis>>()

motors/src/main/kotlin/ru/mipt/npm/devices/pimotionmaster/PiMotionMasterDevice.kt

@@ -13,13 +13,13 @@ import kotlinx.coroutines.sync.withLock
 import kotlinx.coroutines.withTimeout
 import ru.mipt.npm.controls.api.DeviceHub
 import ru.mipt.npm.controls.api.PropertyDescriptor
-import ru.mipt.npm.controls.base.*
-import ru.mipt.npm.controls.controllers.duration
 import ru.mipt.npm.controls.ports.*
+import ru.mipt.npm.controls.spec.*
 import space.kscience.dataforge.context.*
 import space.kscience.dataforge.meta.Meta
 import space.kscience.dataforge.meta.double
 import space.kscience.dataforge.meta.get
+import space.kscience.dataforge.meta.transformations.MetaConverter
 import space.kscience.dataforge.names.NameToken
 import space.kscience.dataforge.values.asValue
 import kotlin.collections.component1
@@ -29,70 +29,20 @@ import kotlin.time.Duration
 class PiMotionMasterDevice(
     context: Context,
     private val portFactory: PortFactory = KtorTcpPort,
-) : DeviceBase(context), DeviceHub {
+) : DeviceBySpec<PiMotionMasterDevice>(PiMotionMasterDevice, context), DeviceHub {
 
     private var port: Port? = null
     //TODO make proxy work
     //PortProxy { portFactory(address ?: error("The device is not connected"), context) }
 
 
-    val connected by readingBoolean(false, descriptorBuilder = {
-        info = "True if the connection address is defined and the device is initialized"
-    }) {
-        port != null
-    }
-
-
-    val connect: DeviceAction by acting({
-        info = "Connect to specific port and initialize axis"
-    }) { portSpec ->
-        //Clear current actions if present
-        if (port != null) {
-            disconnect()
-        }
-        //Update port
-        //address = portSpec.node
-        port = portFactory(portSpec ?: Meta.EMPTY, context)
-        connected.updateLogical(true)
-//        connector.open()
-        //Initialize axes
-        if (portSpec != null) {
-            val idn = identity.read()
-            failIfError { "Can't connect to $portSpec. Error code: $it" }
-            logger.info { "Connected to $idn on $portSpec" }
-            val ids = request("SAI?").map { it.trim() }
-            if (ids != axes.keys.toList()) {
-                //re-define axes if needed
-                axes = ids.associateWith { Axis(it) }
-            }
-            Meta(ids.map { it.asValue() }.asValue())
-            initialize()
-            failIfError()
-        }
-    }
-
-    val disconnect: DeviceAction by acting({
-        info = "Disconnect the program from the device if it is connected"
-    }) {
-        if (port != null) {
-            stop()
-            port?.close()
-        }
-        port = null
-        connected.updateLogical(false)
-    }
-
     fun disconnect() {
         runBlocking {
             disconnect.invoke()
         }
     }
 
-    val timeout: DeviceProperty by writingVirtual(200.asValue()) {
+    var timeoutValue: Duration = Duration.microseconds(200)
-        info = "Timeout"
-    }
-
-    var timeoutValue: Duration by timeout.duration()
 
     /**
      * Name-friendly accessor for axis
@@ -182,166 +132,225 @@ class PiMotionMasterDevice(
         }
     }
 
-    val initialize: DeviceAction by acting {
+    companion object : DeviceSpec<PiMotionMasterDevice>(), Factory<PiMotionMasterDevice> {
-        send("INI")
-    }
 
-    val identity: ReadOnlyDeviceProperty by readingString {
+        override fun invoke(meta: Meta, context: Context): PiMotionMasterDevice = PiMotionMasterDevice(context)
-        request("*IDN?").first()
-    }
 
-    val firmwareVersion: ReadOnlyDeviceProperty by readingString {
+        val connected by booleanProperty(descriptorBuilder = {
-        request("VER?").first()
+            info = "True if the connection address is defined and the device is initialized"
-    }
+        }) {
+            port != null
+        }
 
-    val stop: DeviceAction by acting(
+
-        descriptorBuilder = {
+        val initialize by unitAction {
+            send("INI")
+        }
+
+        val identity by stringProperty {
+            request("*IDN?").first()
+        }
+
+        val firmwareVersion by stringProperty {
+            request("VER?").first()
+        }
+
+        val stop by unitAction({
             info = "Stop all axis"
-        },
+        }) {
-        action = { send("STP") }
+            send("STP")
-    )
+        }
 
-    inner class Axis(val axisId: String) : DeviceBase(context) {
+        val connect by metaAction(descriptorBuilder = {
+            info = "Connect to specific port and initialize axis"
+        }) { portSpec ->
+            //Clear current actions if present
+            if (port != null) {
+                disconnect()
+            }
+            //Update port
+            //address = portSpec.node
+            port = portFactory(portSpec ?: Meta.EMPTY, context)
+            updateLogical(connected, true)
+//        connector.open()
+            //Initialize axes
+            if (portSpec != null) {
+                val idn = identity.read()
+                failIfError { "Can't connect to $portSpec. Error code: $it" }
+                logger.info { "Connected to $idn on $portSpec" }
+                val ids = request("SAI?").map { it.trim() }
+                if (ids != axes.keys.toList()) {
+                    //re-define axes if needed
+                    axes = ids.associateWith { Axis(this, it) }
+                }
+                Meta(ids.map { it.asValue() }.asValue())
+                initialize()
+                failIfError()
+            }
+            null
+        }
 
+        val disconnect by metaAction({
+            info = "Disconnect the program from the device if it is connected"
+        }) {
+            if (port != null) {
+                stop()
+                port?.close()
+            }
+            port = null
+            updateLogical(connected, false)
+            null
+        }
+
+
+        val timeout by property(MetaConverter.duration, PiMotionMasterDevice::timeoutValue) {
+            info = "Timeout"
+        }
+    }
+
+
+    class Axis(
+        val mm: PiMotionMasterDevice,
+        val axisId: String
+    ) : DeviceBySpec<Axis>(Axis, mm.context) {
+
+        /**
+         * TODO Move to head device and abstract
+         */
         private suspend fun readAxisBoolean(command: String): Boolean =
-            requestAndParse(command, axisId)[axisId]?.toIntOrNull()
+            (mm.requestAndParse(command, axisId)[axisId]?.toIntOrNull()
-                    ?: error("Malformed $command response. Should include integer value for $axisId") != 0
+                ?: error("Malformed $command response. Should include integer value for $axisId")) != 0
 
+        /**
+         * TODO Move to head device and abstract
+         */
         private suspend fun writeAxisBoolean(command: String, value: Boolean): Boolean {
             val boolean = if (value) {
                 "1"
             } else {
                 "0"
             }
-            send(command, axisId, boolean)
+            mm.send(command, axisId, boolean)
-            failIfError()
+            mm.failIfError()
             return value
         }
 
-        private fun axisBooleanProperty(command: String, descriptorBuilder: PropertyDescriptor.() -> Unit = {}) =
-            writingBoolean(
-                getter = { readAxisBoolean("$command?") },
-                setter = { _, newValue ->
-                    writeAxisBoolean(command, newValue)
-                },
-                descriptorBuilder = descriptorBuilder
-            )
-
-        private fun axisNumberProperty(command: String, descriptorBuilder: PropertyDescriptor.() -> Unit = {}) =
-            writingDouble(
-                getter = {
-                    requestAndParse("$command?", axisId)[axisId]?.toDoubleOrNull()
-                        ?: error("Malformed $command response. Should include float value for $axisId")
-                },
-                setter = { _, newValue ->
-                    send(command, axisId, newValue.toString())
-                    failIfError()
-                    newValue
-                },
-                descriptorBuilder = descriptorBuilder
-            )
-
-        val enabled by axisBooleanProperty("EAX") {
-            info = "Motor enable state."
-        }
-
-        val halt: DeviceAction by acting {
-            send("HLT", axisId)
-        }
-
-        val targetPosition by axisNumberProperty("MOV") {
-            info = """
-                Sets a new absolute target position for the specified axis.
-                Servo mode must be switched on for the commanded axis prior to using this command (closed-loop operation).
-            """.trimIndent()
-        }
-
-        val onTarget: TypedReadOnlyDeviceProperty<Boolean> by readingBoolean(
-            descriptorBuilder = {
-                info = "Queries the on-target state of the specified axis."
-            },
-            getter = {
-                readAxisBoolean("ONT?")
-            }
-        )
-
-        val reference: ReadOnlyDeviceProperty by readingBoolean(
-            descriptorBuilder = {
-                info = "Get Referencing Result"
-            },
-            getter = {
-                readAxisBoolean("FRF?")
-            }
-        )
-
-        val moveToReference by acting {
-            send("FRF", axisId)
-        }
-
-        val minPosition by readingDouble(
-            descriptorBuilder = {
-                info = "Minimal position value for the axis"
-            },
-            getter = {
-                requestAndParse("TMN?", axisId)[axisId]?.toDoubleOrNull()
-                    ?: error("Malformed `TMN?` response. Should include float value for $axisId")
-            }
-        )
-
-        val maxPosition by readingDouble(
-            descriptorBuilder = {
-                info = "Maximal position value for the axis"
-            },
-            getter = {
-                requestAndParse("TMX?", axisId)[axisId]?.toDoubleOrNull()
-                    ?: error("Malformed `TMX?` response. Should include float value for $axisId")
-            }
-        )
-
-        val position by readingDouble(
-            descriptorBuilder = {
-                info = "The current axis position."
-            },
-            getter = {
-                requestAndParse("POS?", axisId)[axisId]?.toDoubleOrNull()
-                    ?: error("Malformed `POS?` response. Should include float value for $axisId")
-            }
-        )
-
-        val openLoopTarget: DeviceProperty by axisNumberProperty("OMA") {
-            info = "Position for open-loop operation."
-        }
-
-        val closedLoop: TypedDeviceProperty<Boolean> by axisBooleanProperty("SVO") {
-            info = "Servo closed loop mode"
-        }
-
-        val velocity: TypedDeviceProperty<Double> by axisNumberProperty("VEL") {
-            info = "Velocity value for closed-loop operation"
-        }
-
-        val move by acting {
-            val target = it.double ?: it?.get("target").double ?: error("Unacceptable target value $it")
-            closedLoop.write(true)
-            //optionally set velocity
-            it?.get("velocity").double?.let { v ->
-                velocity.write(v)
-            }
-            targetPosition.write(target)
-            //read `onTarget` and `position` properties in a cycle until movement is complete
-            while (!onTarget.readTyped(true)) {
-                position.read(true)
-                delay(200)
-            }
-        }
-
         suspend fun move(target: Double) {
             move(target.asMeta())
         }
-    }
 
-    companion object : Factory<PiMotionMasterDevice> {
+        companion object : DeviceSpec<Axis>() {
-        override fun invoke(meta: Meta, context: Context): PiMotionMasterDevice = PiMotionMasterDevice(context)
+
+            private fun axisBooleanProperty(
+                command: String,
+                descriptorBuilder: PropertyDescriptor.() -> Unit = {}
+            ) = booleanProperty(
+                read = {
+                    readAxisBoolean("$command?")
+                },
+                write = {
+                    writeAxisBoolean(command, it)
+                },
+                descriptorBuilder = descriptorBuilder
+            )
+
+            private fun axisNumberProperty(
+                command: String,
+                descriptorBuilder: PropertyDescriptor.() -> Unit = {}
+            ) = doubleProperty(
+                read = {
+                    mm.requestAndParse("$command?", axisId)[axisId]?.toDoubleOrNull()
+                        ?: error("Malformed $command response. Should include float value for $axisId")
+                },
+                write = { newValue ->
+                    mm.send(command, axisId, newValue.toString())
+                    mm.failIfError()
+                },
+                descriptorBuilder = descriptorBuilder
+            )
+
+            val enabled by axisBooleanProperty("EAX") {
+                info = "Motor enable state."
+            }
+
+            val halt by unitAction {
+                mm.send("HLT", axisId)
+            }
+
+            val targetPosition by axisNumberProperty("MOV") {
+                info = """
+                Sets a new absolute target position for the specified axis.
+                Servo mode must be switched on for the commanded axis prior to using this command (closed-loop operation).
+            """.trimIndent()
+            }
+
+            val onTarget by booleanProperty({
+                info = "Queries the on-target state of the specified axis."
+            }) {
+                readAxisBoolean("ONT?")
+            }
+
+            val reference by booleanProperty({
+                info = "Get Referencing Result"
+            }) {
+                readAxisBoolean("FRF?")
+            }
+
+            val moveToReference by unitAction {
+                mm.send("FRF", axisId)
+            }
+
+            val minPosition by doubleProperty({
+                info = "Minimal position value for the axis"
+            }) {
+                mm.requestAndParse("TMN?", axisId)[axisId]?.toDoubleOrNull()
+                    ?: error("Malformed `TMN?` response. Should include float value for $axisId")
+            }
+
+            val maxPosition by doubleProperty({
+                info = "Maximal position value for the axis"
+            }) {
+                mm.requestAndParse("TMX?", axisId)[axisId]?.toDoubleOrNull()
+                    ?: error("Malformed `TMX?` response. Should include float value for $axisId")
+            }
+
+            val position by doubleProperty({
+                info = "The current axis position."
+            }) {
+                mm.requestAndParse("POS?", axisId)[axisId]?.toDoubleOrNull()
+                    ?: error("Malformed `POS?` response. Should include float value for $axisId")
+            }
+
+            val openLoopTarget by axisNumberProperty("OMA") {
+                info = "Position for open-loop operation."
+            }
+
+            val closedLoop by axisBooleanProperty("SVO") {
+                info = "Servo closed loop mode"
+            }
+
+            val velocity by axisNumberProperty("VEL") {
+                info = "Velocity value for closed-loop operation"
+            }
+
+            val move by metaAction {
+                val target = it.double ?: it?.get("target").double ?: error("Unacceptable target value $it")
+                closedLoop.write(true)
+                //optionally set velocity
+                it?.get("velocity").double?.let { v ->
+                    velocity.write(v)
+                }
+                targetPosition.write(target)
+                //read `onTarget` and `position` properties in a cycle until movement is complete
+                while (!onTarget.read()) {
+                    position.read()
+                    delay(200)
+                }
+                null
+            }
+
+        }
+
     }
 
 }

motors/src/main/kotlin/ru/mipt/npm/devices/pimotionmaster/fxDeviceProperties.kt

@@ -3,58 +3,67 @@ package ru.mipt.npm.devices.pimotionmaster
 import javafx.beans.property.ObjectPropertyBase
 import javafx.beans.property.Property
 import javafx.beans.property.ReadOnlyProperty
-import kotlinx.coroutines.flow.catch
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import ru.mipt.npm.controls.api.Device
-import ru.mipt.npm.controls.base.TypedDeviceProperty
+import ru.mipt.npm.controls.spec.DevicePropertySpec
-import ru.mipt.npm.controls.base.TypedReadOnlyDeviceProperty
+import ru.mipt.npm.controls.spec.WritableDevicePropertySpec
+import ru.mipt.npm.controls.spec.onPropertyChange
+import ru.mipt.npm.controls.spec.write
 import space.kscience.dataforge.context.info
 import space.kscience.dataforge.context.logger
 import tornadofx.*
 
-fun <T : Any> TypedReadOnlyDeviceProperty<T>.fxProperty(ownerDevice: Device?): ReadOnlyProperty<T> =
+/**
-    object : ObjectPropertyBase<T>() {
+ * Bind a FX property to a device property with a given [spec]
-        override fun getBean(): Any? = ownerDevice
+ */
-        override fun getName(): String = this@fxProperty.name
+fun <D : Device, T : Any> Device.fxProperty(
+    spec: DevicePropertySpec<D, T>
+): ReadOnlyProperty<T> = object : ObjectPropertyBase<T>() {
+    override fun getBean(): Any = this
+    override fun getName(): String = spec.name
 
-        init {
+    init {
-            //Read incoming changes
+        //Read incoming changes
-            flowTyped().onEach {
+        onPropertyChange(spec) {
-                if (it != null) {
+            if (it != null) {
-                    runLater {
+                runLater {
+                    try {
                         set(it)
+                    } catch (ex: Throwable) {
+                        logger.info { "Failed to set property $name to $it" }
                     }
-                } else {
-                    invalidated()
                 }
-            }.catch {
+            } else {
-                ownerDevice?.logger?.info { "Failed to set property $name to $it" }
+                invalidated()
-            }.launchIn(scope)
+            }
-        }
+        }
-    }
+    }
-
+}
-fun <T : Any> TypedDeviceProperty<T>.fxProperty(ownerDevice: Device?): Property<T> =
+
-    object : ObjectPropertyBase<T>() {
+fun <D : Device, T : Any> D.fxProperty(spec: WritableDevicePropertySpec<D, T>): Property<T> =
-        override fun getBean(): Any? = ownerDevice
+    object : ObjectPropertyBase<T>() {
-        override fun getName(): String = this@fxProperty.name
+        override fun getBean(): Any = this
-
+        override fun getName(): String = spec.name
-        init {
+
-            //Read incoming changes
+        init {
-            flowTyped().onEach {
+            //Read incoming changes
-                if (it != null) {
+            onPropertyChange(spec) {
-                    runLater {
+                if (it != null) {
-                        set(it)
+                    runLater {
-                    }
+                        try {
-                } else {
+                            set(it)
-                    invalidated()
+                        } catch (ex: Throwable) {
-                }
+                            logger.info { "Failed to set property $name to $it" }
-            }.catch {
+                        }
-                ownerDevice?.logger?.info { "Failed to set property $name  to $it" }
+                    }
-            }.launchIn(scope)
+                } else {
-
+                    invalidated()
-            onChange {
+                }
-                typedValue = it
+            }
+
+            onChange { newValue ->
+                if (newValue != null) {
+                    write(spec, newValue)
+                }
             }
         }
     }

settings.gradle.kts

@@ -4,7 +4,7 @@ enableFeaturePreview("TYPESAFE_PROJECT_ACCESSORS")
 enableFeaturePreview("VERSION_CATALOGS")
 
 pluginManagement {
-    val toolsVersion = "0.10.4"
+    val toolsVersion = "0.10.5"
 
     repositories {
         maven("https://repo.kotlin.link")
@@ -28,7 +28,7 @@ dependencyResolutionManagement {
 
     versionCatalogs {
         create("npm") {
-            from("ru.mipt.npm:version-catalog:0.10.4")
+            from("ru.mipt.npm:version-catalog:0.10.5")
         }
     }
 }