[WIP] redo DataSet fill and updates

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/Action.kt

@@ -5,7 +5,7 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.*
 
 /**
- * A simple data transformation on a data node. Actions should avoid doing actual dependency evaluation in [run].
+ * A simple data transformation on a data node. Actions should avoid doing actual dependency evaluation in [execute].
  */
 public interface Action<in T : Any, out R : Any> {
     /**
@@ -14,7 +14,7 @@ public interface Action<in T : Any, out R : Any> {
      *
      * [scope] context used to compute the initial result, also it is used for updates propagation
      */
-    public suspend fun run(set: DataSet<T>, meta: Meta, scope: CoroutineScope): DataSet<R>
+    public suspend fun execute(dataSet: DataSet<T>, meta: Meta = Meta.EMPTY, scope: CoroutineScope? = null): DataSet<R>
 
     public companion object
 }
@@ -25,8 +25,8 @@ public interface Action<in T : Any, out R : Any> {
 public infix fun <T : Any, I : Any, R : Any> Action<T, I>.then(action: Action<I, R>): Action<T, R> {
     // TODO introduce composite action and add optimize by adding action to the list
     return object : Action<T, R> {
-        override suspend fun run(set: DataSet<T>, meta: Meta, scope: CoroutineScope): DataSet<R> {
+        override suspend fun execute(dataSet: DataSet<T>, meta: Meta, scope: CoroutineScope?): DataSet<R> {
-            return action.run(this@then.run(set, meta, scope), meta, scope)
+            return action.execute(this@then.execute(dataSet, meta, scope), meta, scope)
         }
     }
 }

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/CachingAction.kt

@@ -4,6 +4,7 @@ import hep.dataforge.meta.Meta
 import hep.dataforge.names.Name
 import hep.dataforge.names.startsWith
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.collect
 import kotlin.reflect.KClass
@@ -29,18 +30,20 @@ public abstract class CachingAction<in T : Any, out R : Any>(
         key: Name = Name.EMPTY,
     ): Flow<NamedData<R>>
 
-    override suspend fun run(
+    override suspend fun execute(
-        set: DataSet<T>,
+        dataSet: DataSet<T>,
         meta: Meta,
-        scope: CoroutineScope,
+        scope: CoroutineScope?,
-    ): DataSet<R> = DataTree.dynamic(outputType,scope) {
+    ): DataSet<R> = DataTree.dynamic(outputType) {
-        collectFrom(scope.transform(set, meta))
+        coroutineScope {
-        scope.let {
+            collectFrom(transform(dataSet, meta))
-            set.updates.collect {
+        }
+        scope?.let {
+            dataSet.updates.collect {
                 //clear old nodes
                 remove(it)
                 //collect new items
-                collectFrom(scope.transform(set, meta, it))
+                collectFrom(scope.transform(dataSet, meta, it))
                 //FIXME if the target is data, updates are fired twice
             }
         }

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/Data.kt

@@ -44,13 +44,15 @@ public interface Data<out T : Any> : Goal<T>, MetaRepr {
         /**
          * An empty data containing only meta
          */
-        public fun <T> empty(meta: Meta): Data<Nothing> = object : Data<Nothing> {
+        public fun empty(meta: Meta): Data<Nothing> = object : Data<Nothing> {
             override val type: KClass<out Nothing> = Nothing::class
             override val meta: Meta = meta
             override val dependencies: Collection<Goal<*>> = emptyList()
-            override val deferred: Deferred<Nothing> get() = GlobalScope.async(start = CoroutineStart.LAZY) {
+            override val deferred: Deferred<Nothing>
-                error("The Data is empty and could not be computed")
+                get() = GlobalScope.async(start = CoroutineStart.LAZY) {
-            }
+                    error("The Data is empty and could not be computed")
+                }
+
             override fun async(coroutineScope: CoroutineScope): Deferred<Nothing> = deferred
             override fun reset() {}
         }
@@ -92,7 +94,18 @@ public inline fun <reified T : Any> Data(
 public class NamedData<out T : Any> internal constructor(
     override val name: Name,
     public val data: Data<T>,
-) : Data<T> by data, Named
+) : Data<T> by data, Named {
+    override fun toString(): String = buildString {
+        append("NamedData(name=\"$name\"")
+        if(data is StaticData){
+            append(", value=${data.value}")
+        }
+        if(!data.meta.isEmpty()){
+            append(", meta=${data.meta}")
+        }
+        append(")")
+    }
+}
 
 public fun <T : Any> Data<T>.named(name: Name): NamedData<T> = if (this is NamedData) {
     NamedData(name, this.data)

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/DataSet.kt

@@ -77,3 +77,5 @@ public suspend fun DataSet<*>.toMeta(): Meta = Meta {
         }
     }
 }
+
+public val <T : Any> DataSet<T>.updatesWithData: Flow<NamedData<T>> get() = updates.mapNotNull { getData(it)?.named(it) }

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/DataSetBuilder.kt

@@ -4,50 +4,81 @@ import hep.dataforge.meta.DFExperimental
 import hep.dataforge.meta.Meta
 import hep.dataforge.meta.MetaBuilder
 import hep.dataforge.names.Name
+import hep.dataforge.names.plus
 import hep.dataforge.names.toName
 import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.collect
 
 public interface DataSetBuilder<in T : Any> {
-    public fun remove(name: Name)
+    /**
+     * Remove all data items starting with [name]
+     */
+    public suspend fun remove(name: Name)
 
-    public operator fun set(name: Name, data: Data<T>?)
+    public suspend fun set(name: Name, data: Data<T>?)
 
-    public suspend fun set(name: Name, dataSet: DataSet<T>)
+    /**
-
+     * Set a current state of given [dataSet] into a branch [name]. Does not propagate updates
-    public operator fun set(name: Name, block: DataSetBuilder<T>.() -> Unit)
+     */
+    public suspend fun set(name: Name, dataSet: DataSet<T>){
+        //remove previous items
+        remove(name)
+        //Set new items
+        dataSet.flow().collect {
+            set(name + it.name, it.data)
+        }
+    }
 
     /**
      * Append data to node
      */
-    public infix fun String.put(data: Data<T>): Unit = set(toName(), data)
+    public suspend infix fun String.put(data: Data<T>): Unit = set(toName(), data)
 
     /**
      * Append node
      */
-    public suspend infix fun String.put(tree: DataSet<T>): Unit = set(toName(), tree)
+    public suspend infix fun String.put(dataSet: DataSet<T>): Unit = set(toName(), dataSet)
 
     /**
      * Build and append node
      */
-    public infix fun String.put(block: DataSetBuilder<T>.() -> Unit): Unit = set(toName(), block)
+    public suspend infix fun String.put(block: suspend DataSetBuilder<T>.() -> Unit): Unit = set(toName(), block)
+}
 
+private class SubSetBuilder<in T : Any>(private val parent: DataSetBuilder<T>, private val branch: Name) :
+    DataSetBuilder<T> {
+    override suspend fun remove(name: Name) {
+        parent.remove(branch + name)
+    }
+
+    override suspend fun set(name: Name, data: Data<T>?) {
+        parent.set(branch + name, data)
+    }
+
+    override suspend fun set(name: Name, dataSet: DataSet<T>) {
+        parent.set(branch + name, dataSet)
+    }
+}
+
+public suspend fun <T : Any> DataSetBuilder<T>.set(name: Name, block: suspend DataSetBuilder<T>.() -> Unit){
+    SubSetBuilder(this,name).apply { block() }
 }
 
 
-public operator fun <T : Any> DataSetBuilder<T>.set(name: String, data: Data<T>) {
+public suspend fun <T : Any> DataSetBuilder<T>.set(name: String, data: Data<T>) {
-    this@set[name.toName()] = data
+    set(name.toName(), data)
 }
 
-public fun <T : Any> DataSetBuilder<T>.data(name: Name, data: T, meta: Meta = Meta.EMPTY) {
+public suspend fun <T : Any> DataSetBuilder<T>.data(name: Name, data: T, meta: Meta = Meta.EMPTY) {
     set(name, Data.static(data, meta))
 }
 
-public fun <T : Any> DataSetBuilder<T>.data(name: Name, data: T, block: MetaBuilder.() -> Unit = {}) {
+public suspend fun <T : Any> DataSetBuilder<T>.data(name: Name, data: T, block: MetaBuilder.() -> Unit = {}) {
     set(name, Data.static(data, Meta(block)))
 }
 
-public fun <T : Any> DataSetBuilder<T>.data(name: String, data: T, block: MetaBuilder.() -> Unit = {}) {
+public suspend fun <T : Any> DataSetBuilder<T>.data(name: String, data: T, block: MetaBuilder.() -> Unit = {}) {
     set(name.toName(), Data.static(data, Meta(block)))
 }
 
@@ -55,7 +86,7 @@ public suspend fun <T : Any> DataSetBuilder<T>.set(name: String, set: DataSet<T>
     this.set(name.toName(), set)
 }
 
-public operator fun <T : Any> DataSetBuilder<T>.set(name: String, block: DataSetBuilder<T>.() -> Unit): Unit =
+public suspend fun <T : Any> DataSetBuilder<T>.set(name: String, block: suspend DataSetBuilder<T>.() -> Unit): Unit =
     this@set.set(name.toName(), block)
 
 
@@ -63,9 +94,15 @@ public operator fun <T : Any> DataSetBuilder<T>.set(name: String, block: DataSet
  * Update data with given node data and meta with node meta.
  */
 @DFExperimental
-public suspend fun <T: Any> DataSetBuilder<T>.update(tree: DataSet<T>): Unit = coroutineScope{
+public suspend fun <T : Any> DataSetBuilder<T>.update(tree: DataSet<T>): Unit = coroutineScope {
     tree.flow().collect {
         //TODO check if the place is occupied
         set(it.name, it.data)
     }
 }
+
+public suspend fun <T : Any> DataSetBuilder<T>.collectFrom(flow: Flow<NamedData<T>>) {
+    flow.collect {
+        set(it.name, it.data)
+    }
+}

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/DataTree.kt

@@ -46,9 +46,11 @@ public interface DataTree<out T : Any> : DataSet<T> {
 
     override fun flow(): Flow<NamedData<T>> = flow {
         items().forEach { (token, childItem: DataTreeItem<T>) ->
-            when (childItem) {
+            if(!token.body.startsWith("@")) {
-                is DataTreeItem.Leaf -> emit(childItem.data.named(token.asName()))
+                when (childItem) {
-                is DataTreeItem.Node -> emitAll(childItem.tree.flow().map { it.named(token + it.name) })
+                    is DataTreeItem.Leaf -> emit(childItem.data.named(token.asName()))
+                    is DataTreeItem.Node -> emitAll(childItem.tree.flow().map { it.named(token + it.name) })
+                }
             }
         }
     }

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/GroupRule.kt

@@ -41,7 +41,7 @@ public interface GroupRule {
 
                     set.flow().collect { data ->
                         val tagValue = data.meta[key]?.string ?: defaultTagValue
-                        map.getOrPut(tagValue) { MutableDataTree(dataType, scope) }.set(data.name, data.data)
+                        map.getOrPut(tagValue) { MutableDataTree(dataType) }.set(data.name, data.data)
                     }
 
                     return map

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/MapAction.kt

@@ -33,16 +33,16 @@ public class MapActionBuilder<T, R>(public var name: Name, public var meta: Meta
 }
 
 
-public class MapAction<T : Any, out R : Any>(
+public class MapAction<in T : Any, out R : Any>(
     public val outputType: KClass<out R>,
     private val block: MapActionBuilder<T, R>.() -> Unit,
 ) : Action<T, R> {
 
-    override suspend fun run(
+    override suspend fun execute(
-        set: DataSet<T>,
+        dataSet: DataSet<T>,
         meta: Meta,
-        scope: CoroutineScope,
+        scope: CoroutineScope?,
-    ): DataSet<R> = DataTree.dynamic(outputType, scope) {
+    ): DataSet<R> {
         suspend fun mapOne(data: NamedData<T>): NamedData<R> {
             // Creating a new environment for action using **old** name, old meta and task meta
             val env = ActionEnv(data.name, data.meta, meta)
@@ -65,23 +65,26 @@ public class MapAction<T : Any, out R : Any>(
             return newData.named(newName)
         }
 
-        collectFrom(set.flow().map(::mapOne))
+        val flow = dataSet.flow().map(::mapOne)
-        scope.launch {
+
-            set.updates.collect { name ->
+        return DataTree.dynamic(outputType) {
-                //clear old nodes
+            collectFrom(flow)
-                remove(name)
+            scope?.launch {
-                //collect new items
+                dataSet.updates.collect { name ->
-                collectFrom(set.flowChildren(name).map(::mapOne))
+                    //clear old nodes
+                    remove(name)
+                    //collect new items
+                    collectFrom(dataSet.flowChildren(name).map(::mapOne))
+                }
             }
         }
     }
 }
 
-public suspend inline fun <T : Any, reified R : Any> DataSet<T>.map(
+
-    meta: Meta,
+@Suppress("FunctionName")
-    updatesScope: CoroutineScope,
+public inline fun <T : Any, reified R : Any> MapAction(
-    noinline action: MapActionBuilder<in T, out R>.() -> Unit,
+    noinline builder: MapActionBuilder<T, R>.() -> Unit,
-): DataSet<R> = MapAction(R::class, action).run(this, meta, updatesScope)
+): MapAction<T, R> = MapAction(R::class, builder)
-
 
 

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/MutableDataTree.kt

@@ -3,7 +3,7 @@ package hep.dataforge.data
 import hep.dataforge.meta.*
 import hep.dataforge.names.*
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
@@ -15,12 +15,13 @@ import kotlin.reflect.KClass
  */
 public class MutableDataTree<T : Any>(
     override val dataType: KClass<out T>,
-    public val scope: CoroutineScope,
 ) : DataTree<T>, DataSetBuilder<T> {
     private val mutex = Mutex()
     private val treeItems = HashMap<NameToken, DataTreeItem<T>>()
 
-    override suspend fun items(): Map<NameToken, DataTreeItem<T>> = mutex.withLock { treeItems }
+    override suspend fun items(): Map<NameToken, DataTreeItem<T>> = mutex.withLock {
+        treeItems.filter { !it.key.body.startsWith("@") }
+    }
 
     private val _updates = MutableSharedFlow<Name>()
 
@@ -35,36 +36,37 @@ public class MutableDataTree<T : Any>(
         }
     }
 
-    override fun remove(name: Name) {
+    override suspend fun remove(name: Name) {
-        scope.launch {
+        if (name.isEmpty()) error("Can't remove the root node")
-            if (name.isEmpty()) error("Can't remove the root node")
+        (getItem(name.cutLast()).tree as? MutableDataTree)?.remove(name.lastOrNull()!!)
-            (getItem(name.cutLast()).tree as? MutableDataTree)?.remove(name.lastOrNull()!!)
-        }
     }
 
-    private suspend fun set(token: NameToken, node: DataSet<T>) {
+//    private suspend fun set(token: NameToken, node: DataSet<T>) {
-        //if (_map.containsKey(token)) error("Tree entry with name $token is not empty")
+//        //if (_map.containsKey(token)) error("Tree entry with name $token is not empty")
-        mutex.withLock {
+//        mutex.withLock {
-            treeItems[token] = DataTreeItem.Node(node.toMutableTree(scope))
+//            treeItems[token] = DataTreeItem.Node(node.toMutableTree())
-            coroutineScope {
+//            coroutineScope {
-                node.updates.onEach {
+//                node.updates.onEach {
-                    _updates.emit(token + it)
+//                    _updates.emit(token + it)
-                }.launchIn(this)
+//                }.launchIn(this)
-            }
+//            }
-            _updates.emit(token.asName())
+//            _updates.emit(token.asName())
-        }
+//        }
-    }
+//    }
 
     private suspend fun set(token: NameToken, data: Data<T>) {
         mutex.withLock {
             treeItems[token] = DataTreeItem.Leaf(data)
-            _updates.emit(token.asName())
         }
     }
 
     private suspend fun getOrCreateNode(token: NameToken): MutableDataTree<T> =
         (treeItems[token] as? DataTreeItem.Node<T>)?.tree as? MutableDataTree<T>
-            ?: MutableDataTree(dataType, scope).also { set(token, it) }
+            ?: MutableDataTree(dataType).also {
+                mutex.withLock {
+                    treeItems[token] = DataTreeItem.Node(it)
+                }
+            }
 
     private suspend fun getOrCreateNode(name: Name): MutableDataTree<T> {
         return when (name.length) {
@@ -74,83 +76,53 @@ public class MutableDataTree<T : Any>(
         }
     }
 
-    override fun set(name: Name, data: Data<T>?) {
+    override suspend fun set(name: Name, data: Data<T>?) {
         if (data == null) {
             remove(name)
         } else {
-            scope.launch {
+            when (name.length) {
-                when (name.length) {
+                0 -> error("Can't add data with empty name")
-                    0 -> error("Can't add data with empty name")
+                1 -> set(name.firstOrNull()!!, data)
-                    1 -> set(name.firstOrNull()!!, data)
+                2 -> getOrCreateNode(name.cutLast()).set(name.lastOrNull()!!, data)
-                    2 -> getOrCreateNode(name.cutLast()).set(name.lastOrNull()!!, data)
-                }
             }
         }
+        _updates.emit(name)
     }
 
-    private suspend fun setTree(name: Name, node: MutableDataTree<out T>) {
+    /**
-        when (name.length) {
+     * Copy given data set and mirror its changes to this [MutableDataTree] in [this@setAndObserve]. Returns an update [Job]
-            0 -> error("Can't add data with empty name")
+     */
-            1 -> set(name.firstOrNull()!!, node)
+    public fun CoroutineScope.setAndObserve(name: Name, dataSet: DataSet<T>): Job = launch {
-            2 -> getOrCreateNode(name.cutLast()).set(name.lastOrNull()!!, node)
+        set(name, dataSet)
+        dataSet.updates.collect { nameInBranch ->
+            set(name + nameInBranch, dataSet.getData(nameInBranch))
         }
     }
-
-    override suspend fun set(name: Name, dataSet: DataSet<T>): Unit {
-        if (dataSet is MutableDataTree) {
-            setTree(name, dataSet)
-        } else {
-            setTree(name, dataSet.toMutableTree(scope))
-        }
-    }
-
-    override fun set(name: Name, block: DataSetBuilder<T>.() -> Unit) {
-        scope.launch {
-            setTree(name, MutableDataTree(dataType, scope).apply(block))
-        }
-    }
-
-    public fun collectFrom(flow: Flow<NamedData<T>>) {
-        flow.onEach {
-            set(it.name, it.data)
-        }.launchIn(scope)
-    }
 }
 
+/**
+ * Create a dynamic tree. Initial data is placed synchronously. Updates are propagated via [updatesScope]
+ */
 public suspend fun <T : Any> DataTree.Companion.dynamic(
     type: KClass<out T>,
-    updatesScope: CoroutineScope,
     block: suspend MutableDataTree<T>.() -> Unit,
 ): DataTree<T> {
-    val tree = MutableDataTree(type, updatesScope)
+    val tree = MutableDataTree(type)
     tree.block()
     return tree
 }
 
 public suspend inline fun <reified T : Any> DataTree.Companion.dynamic(
-    updatesScope: CoroutineScope,
     crossinline block: suspend MutableDataTree<T>.() -> Unit,
-): DataTree<T> = MutableDataTree(T::class, updatesScope).apply { block() }
+): DataTree<T> = MutableDataTree(T::class).apply { block() }
 
 
 public suspend inline fun <reified T : Any> MutableDataTree<T>.set(
     name: Name,
     noinline block: suspend MutableDataTree<T>.() -> Unit,
-): Unit = set(name, DataTree.dynamic(T::class, scope, block))
+): Unit = set(name, DataTree.dynamic(T::class, block))
 
 public suspend inline fun <reified T : Any> MutableDataTree<T>.set(
     name: String,
     noinline block: suspend MutableDataTree<T>.() -> Unit,
-): Unit = set(name.toName(), DataTree.dynamic(T::class, scope, block))
+): Unit = set(name.toName(), DataTree.dynamic(T::class, block))
-
-/**
- * Generate a mutable builder from this node. Node content is not changed
- */
-public suspend fun <T : Any> DataSet<T>.toMutableTree(
-    scope: CoroutineScope,
-): MutableDataTree<T> = MutableDataTree(dataType, scope).apply {
-    flow().collect { set(it.name, it.data) }
-    this@toMutableTree.updates.onEach {
-        set(it, getData(it))
-    }.launchIn(scope)
-}

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/SplitAction.kt

@@ -13,7 +13,6 @@ import kotlin.collections.set
 import kotlin.reflect.KClass
 
 
-
 public class SplitBuilder<T : Any, R : Any>(public val name: Name, public val meta: Meta) {
 
     public class FragmentRule<T : Any, R : Any>(public val name: Name, public var meta: MetaBuilder) {
@@ -44,11 +43,11 @@ public class SplitAction<T : Any, R : Any>(
     private val action: SplitBuilder<T, R>.() -> Unit,
 ) : Action<T, R> {
 
-    override suspend fun run(
+    override suspend fun execute(
-        set: DataSet<T>,
+        dataSet: DataSet<T>,
         meta: Meta,
-        scope: CoroutineScope,
+        scope: CoroutineScope?,
-    ): DataSet<R> = DataTree.dynamic(outputType, scope) {
+    ): DataSet<R> {
 
         suspend fun splitOne(data: NamedData<T>): Flow<NamedData<R>> {
             val laminate = Laminate(data.meta, meta)
@@ -63,13 +62,15 @@ public class SplitAction<T : Any, R : Any>(
             }
         }
 
-        collectFrom(set.flow().flatMapConcat(transform = ::splitOne))
+        return DataTree.dynamic(outputType) {
-        scope.launch {
+            collectFrom(dataSet.flow().flatMapConcat(transform = ::splitOne))
-            set.updates.collect { name ->
+            scope?.launch {
-                //clear old nodes
+                dataSet.updates.collect { name ->
-                remove(name)
+                    //clear old nodes
-                //collect new items
+                    remove(name)
-                collectFrom(set.flowChildren(name).flatMapConcat(transform = ::splitOne))
+                    //collect new items
+                    collectFrom(dataSet.flowChildren(name).flatMapConcat(transform = ::splitOne))
+                }
             }
         }
     }

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/StaticDataTree.kt

@@ -5,7 +5,8 @@ import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.flow.*
 import kotlin.reflect.KClass
 
-private class StaticDataTree<T : Any>(
+@PublishedApi
+internal class StaticDataTree<T : Any>(
     override val dataType: KClass<out T>,
 ) : DataSetBuilder<T>, DataTree<T> {
 
@@ -13,9 +14,9 @@ private class StaticDataTree<T : Any>(
 
     override val updates: Flow<Name> = emptyFlow()
 
-    override suspend fun items(): Map<NameToken, DataTreeItem<T>> = items
+    override suspend fun items(): Map<NameToken, DataTreeItem<T>> = items.filter { !it.key.body.startsWith("@") }
 
-    override fun remove(name: Name) {
+    override suspend fun remove(name: Name) {
         when (name.length) {
             0 -> error("Can't remove root tree node")
             1 -> items.remove(name.firstOrNull()!!)
@@ -34,7 +35,7 @@ private class StaticDataTree<T : Any>(
         else -> getOrCreateNode(name.cutLast()).getOrCreateNode(name.lastOrNull()!!.asName())
     }
 
-    private operator fun set(name: Name, item: DataTreeItem<T>?) {
+    private suspend fun set(name: Name, item: DataTreeItem<T>?) {
         if (name.isEmpty()) error("Can't set top level tree node")
         if (item == null) {
             remove(name)
@@ -43,7 +44,7 @@ private class StaticDataTree<T : Any>(
         }
     }
 
-    override fun set(name: Name, data: Data<T>?) {
+    override suspend fun set(name: Name, data: Data<T>?) {
         set(name, data?.let { DataTreeItem.Leaf(it) })
     }
 
@@ -58,20 +59,15 @@ private class StaticDataTree<T : Any>(
             }
         }
     }
-
-    override fun set(name: Name, block: DataSetBuilder<T>.() -> Unit) {
-        val tree = StaticDataTree(dataType).apply(block)
-        set(name, DataTreeItem.Node(tree))
-    }
 }
 
-public fun <T : Any> DataTree.Companion.static(
+public suspend fun <T : Any> DataTree.Companion.static(
     dataType: KClass<out T>,
-    block: DataSetBuilder<T>.() -> Unit,
+    block: suspend DataSetBuilder<T>.() -> Unit,
-): DataTree<T> = StaticDataTree(dataType).apply(block)
+): DataTree<T> = StaticDataTree(dataType).apply { block() }
 
-public inline fun <reified T : Any> DataTree.Companion.static(
+public suspend inline fun <reified T : Any> DataTree.Companion.static(
-    noinline block: DataSetBuilder<T>.() -> Unit,
+    noinline block: suspend DataSetBuilder<T>.() -> Unit,
 ): DataTree<T> = static(T::class, block)
 
 public suspend fun <T : Any> DataSet<T>.toStaticTree(): DataTree<T> = StaticDataTree(dataType).apply {

dataforge-data/src/commonMain/kotlin/hep/dataforge/data/dataSetMeta.kt

@@ -12,9 +12,9 @@ public suspend fun DataSet<*>.getMeta(): Meta? = getData(DataSet.META_KEY)?.meta
 /**
  * Add meta-data node to a [DataSet]
  */
-public fun DataSetBuilder<*>.meta(meta: Meta): Unit = set(DataSet.META_KEY, Data.empty(meta))
+public suspend fun DataSetBuilder<*>.meta(meta: Meta): Unit = set(DataSet.META_KEY, Data.empty(meta))
 
 /**
  * Add meta-data node to a [DataSet]
  */
-public fun DataSetBuilder<*>.meta(metaBuilder: MetaBuilder.() -> Unit): Unit = meta(Meta(metaBuilder))
+public suspend fun DataSetBuilder<*>.meta(metaBuilder: MetaBuilder.() -> Unit): Unit = meta(Meta(metaBuilder))

dataforge-data/src/jvmTest/kotlin/hep/dataforge/data/ActionsTest.kt

@@ -0,0 +1,39 @@
+package hep.dataforge.data
+
+import kotlinx.coroutines.runBlocking
+import org.junit.jupiter.api.Test
+import kotlin.test.assertEquals
+
+class ActionsTest {
+    val data: DataTree<Int> = runBlocking {
+        DataTree.static {
+            repeat(10) {
+                data(it.toString(), it)
+            }
+        }
+    }
+
+    @Test
+    fun testStaticMapAction() {
+        val plusOne = MapAction<Int, Int> {
+            result { it + 1 }
+        }
+        runBlocking {
+            val result = plusOne.execute(data)
+            assertEquals(2, result.getData("1")?.value())
+        }
+    }
+
+    @Test
+    fun testDynamicMapAction() {
+        val plusOne = MapAction<Int, Int> {
+            result { it + 1 }
+        }
+        val datum = runBlocking {
+            val result = plusOne.execute(data, scope = this)
+            result.getData("1")?.value()
+        }
+        assertEquals(2, datum)
+    }
+
+}

dataforge-data/src/jvmTest/kotlin/hep/dataforge/data/DataTreeBuilderTest.kt

@@ -1,34 +1,69 @@
 package hep.dataforge.data
 
-import kotlinx.coroutines.runBlocking
+import hep.dataforge.names.toName
+import kotlinx.coroutines.*
+import kotlinx.coroutines.flow.collect
 import kotlin.test.Test
-import kotlin.test.assertTrue
+import kotlin.test.assertEquals
 
 
-internal class DataTreeBuilderTest{
+internal class DataTreeBuilderTest {
     @Test
-    fun testDataUpdate(){
+    fun testDataUpdate() = runBlocking {
-        val updateData: DataTree<Any> = DataTree.static{
+        val updateData: DataTree<Any> = DataTree.static {
             "update" put {
                 "a" put Data.static("a")
                 "b" put Data.static("b")
             }
         }
 
-        val node = DataTree.static<Any>{
+        val node = DataTree.static<Any> {
-            set("primary"){
+            set("primary") {
-                data("a","a")
+                data("a", "a")
-                data("b","b")
+                data("b", "b")
-            }
-            data("root","root")
-            runBlocking {
-                update(updateData)
             }
+            data("root", "root")
+            update(updateData)
         }
 
 
-        assertTrue { node.branch("update.a") != null }
+        assertEquals("a", node.getData("update.a")?.value())
-        assertTrue { node.branch("primary.a") != null }
+        assertEquals("a", node.getData("primary.a")?.value())
+    }
+
+    @Test
+    fun testDynamicUpdates() = runBlocking {
+        try {
+            supervisorScope {
+                val subNode = DataTree.dynamic<Int> {
+                    launch {
+                        repeat(10) {
+                            delay(10)
+                            data("value", it)
+                        }
+                    }
+                }
+                launch {
+                    subNode.updatesWithData.collect {
+                        println(it)
+                    }
+                }
+                val rootNode = DataTree.dynamic<Int> {
+                    setAndObserve("sub".toName(), subNode)
+                }
+
+                launch {
+                    rootNode.updatesWithData.collect {
+                        println(it)
+                    }
+                }
+                delay(200)
+                assertEquals(9, rootNode.getData("sub.value")?.value())
+                cancel()
+            }
+        } catch (t: Throwable) {
+            if (t !is CancellationException) throw  t
+        }
 
     }
 }

dataforge-meta/src/commonMain/kotlin/hep/dataforge/names/Name.kt

@@ -193,7 +193,7 @@ public fun Name.endsWith(name: Name): Boolean =
  * if [this] starts with given [head] name, returns the reminder of the name (could be empty). Otherwise returns null
  */
 public fun Name.removeHeadOrNull(head: Name): Name? = if (startsWith(head)) {
-    Name(tokens.subList(head.length, head.length))
+    Name(tokens.subList(head.length, length))
 } else {
     null
 }

dataforge-workspace/src/commonMain/kotlin/hep/dataforge/workspace/Task.kt

@@ -3,13 +3,12 @@ package hep.dataforge.workspace
 import hep.dataforge.data.DataSet
 import hep.dataforge.meta.Meta
 import hep.dataforge.meta.descriptors.Described
-import hep.dataforge.misc.Named
 import hep.dataforge.misc.Type
 import hep.dataforge.workspace.Task.Companion.TYPE
 import kotlin.reflect.KClass
 
 @Type(TYPE)
-public interface Task<out R : Any> : Named, Described {
+public interface Task<out R : Any> : Described {
 
     /**
      * The explicit type of the node returned by the task

dataforge-workspace/src/commonMain/kotlin/hep/dataforge/workspace/TaskModel.kt

@@ -104,12 +104,11 @@ public fun TaskDependencyContainer.data(
     pattern: String? = null,
     from: String? = null,
     to: String? = null,
-): DataDependency =
+): DataDependency = data {
-    data {
+    pattern?.let { this.pattern = it }
-        pattern?.let { this.pattern = it }
+    from?.let { this.from = it }
-        from?.let { this.from = it }
+    to?.let { this.to = it }
-        to?.let { this.to = it }
+}
-    }
 
 ///**
 // * Add all data as root node

dataforge-workspace/src/jvmMain/kotlin/hep/dataforge/workspace/TaskBuilder.kt

@@ -35,14 +35,7 @@ public class TaskBuilder<R : Any>(private val name: Name, public val type: KClas
         public val meta: Meta,
         public val context: Context,
         public val data: DataSet<Any>,
-    ) {
+    )
-//        public operator fun <T : Any> DirectTaskDependency<T>.invoke(): DataSet<T> = if (placement.isEmpty()) {
-//            data.cast(task.type)
-//        } else {
-//            data[placement].tree?.cast(task.type)
-//                ?: error("Could not find results of direct task dependency $this at \"$placement\"")
-//        }
-    }
 
     /**
      * Add a transformation on untyped data
@@ -86,7 +79,7 @@ public class TaskBuilder<R : Any>(private val name: Name, public val type: KClas
         crossinline block: TaskEnv.() -> Action<T, R>,
     ) {
         transform { data: DataSet<T> ->
-            block().run(data, meta, context)
+            block().execute(data, meta, context)
         }
     }
 
@@ -194,15 +187,19 @@ public class TaskBuilder<R : Any>(private val name: Name, public val type: KClas
                     logger.warn { "No transformation present, returning input data" }
                     dataSet.castOrNull(type) ?: error("$type expected, but $type received")
                 } else {
-                    val builder = MutableDataTree(type, workspace.context)
+                    DataTree.dynamic(type, workspace.context){
-                    dataTransforms.forEach { transformation ->
+                        dataTransforms.forEach { transformation ->
-                        val res = transformation(workspace.context, model, dataSet)
+                            val res = transformation(workspace.context, model, dataSet)
-                        builder.update(res)
+                            update(res)
+                        }
                     }
-                    builder
                 }
             }
         }
     }
 }
 
+@DFExperimental
+public suspend inline fun <reified T : Any> TaskBuilder.TaskEnv.dataTree(
+    crossinline block: suspend MutableDataTree<T>.() -> Unit,
+): DataTree<T> = DataTree.dynamic(context, block)

dataforge-workspace/src/jvmMain/kotlin/hep/dataforge/workspace/WorkspaceBuilder.kt

@@ -37,6 +37,8 @@ public fun WorkspaceBuilder.target(name: String, block: MetaBuilder.() -> Unit)
     targets[name] = Meta(block).seal()
 }
 
+class WorkspaceTask(val workspace: Workspace, val name: String)
+
 /**
  * Use existing target as a base updating it with the block
  */
@@ -52,7 +54,7 @@ public fun <T : Any> WorkspaceBuilder.task(
     name: String,
     type: KClass<out T>,
     builder: TaskBuilder<T>.() -> Unit,
-): Task<T> = TaskBuilder(name.toName(), type).apply(builder).build().also { tasks.add(it) }
+): WorkspaceTask = TaskBuilder(name.toName(), type).apply(builder).build().also { tasks.add(it) }
 
 public inline fun <reified T : Any> WorkspaceBuilder.task(
     name: String,

dataforge-workspace/src/jvmTest/kotlin/hep/dataforge/workspace/DataPropagationTest.kt

@@ -33,7 +33,7 @@ class DataPropagationTestPlugin : WorkspacePlugin() {
 
     val testSingleData = task("singleData", Int::class) {
         model {
-            data("myData\\[12\\]")
+            data(pattern = "myData\\[12\\]")
         }
         transform<Int> { data ->
             DataTree.dynamic(context) {

dataforge-workspace/src/jvmTest/kotlin/hep/dataforge/workspace/SimpleWorkspaceTest.kt

@@ -85,7 +85,7 @@ class SimpleWorkspaceTest {
             transform<Int> { data ->
                 val squareNode = data.branch("square").filterIsInstance<Int>() //squareDep()
                 val linearNode = data.branch("linear").filterIsInstance<Int>() //linearDep()
-                DataTree.dynamic<Int>(context) {
+                dataTree {
                     squareNode.flow().collect {
                         val newData: Data<Int> = Data {
                             val squareValue = squareNode.getData(it.name)!!.value()
@@ -150,6 +150,7 @@ class SimpleWorkspaceTest {
     }
 
     @Test
+    @Timeout(1)
     fun testWorkspace() {
         val node = workspace.runBlocking("sum")
         val res = node.first()
@@ -157,7 +158,7 @@ class SimpleWorkspaceTest {
     }
 
     @Test
-    @Timeout(400)
+    @Timeout(1)
     fun testMetaPropagation() {
         val node = workspace.runBlocking("sum") { "testFlag" put true }
         val res = node.first()?.value()
@@ -179,7 +180,7 @@ class SimpleWorkspaceTest {
     }
 
     @Test
-    fun testGather() {
+    fun testFilter() {
         val node = workspace.runBlocking("filterOne")
         runBlocking {
             assertEquals(12, node.first()?.value())