Scala future recursion returning early -

-

I'm trying to use a recursive future call to get a tree with a certain depth Futures. Flatap quickly Beginning Returning

We have a graph database (the nodes in the tree) with the edges (parent's relationship) and institutions to regain the tree. For, we have two separate calls: getEdges and getEntitiesFromChildEdges. Return futures both.

Initial call, getEquipment, is needed to return a future. Since I eventually need to return the future, so I do not want to wait artificial.

Here is the code getEquipment is called the first time. GetTree (Root Entity: Seek [Unit], Parents: Seek [Unit], Depth: Int.): Future [SEQ [unit]] {GetEdges (Parents) .flatMap { Edges = & gt; GetEntitiesFromChildEdges (edges) .map {children = & gt; Children Fresh (child => ("lower", root entities) root entity} and {Log TheTree ("Dear", root entities) root entities (deep;); (depth; gt; 0) GetStream {Junk] {getRootEntities.flatMap {rootEntities = & gt; GetTree (rootEntities, Root Entity, 3) .flatMap {returnRootEntities => LogTheTree ("Final", root Entity) Json.toJson (rootEntities)}}

getEquipment is the first of these log results are said that the paste is completely created before the last returns Note logs with. < Dear Prior 

  Dear Root Deaper One Final Root Ultimate One --- Depar Root Depar A Depar to Deper Three! Dear Root: DearPear One, Paste transversal is fourth-fourth, instead of gate-enter, getEntities reduce the call is not consistent with the question, but it helps to understand how a sequence has been passed to the tree transal.  
 Finally, I know that I am unnecessarily in root entities I'm sorry, but the compiler complains when getTree.flatMap doesn ' returned RootEntities = & gt; Follow with . The real  getEquipment: future  is more complex, but it is for a different question.  promise   
 
 
 to control this  future  based restructuring < Here's an example based on my comment to use / code>. I simplified your example so that code is cleaner, but still there are issues with the need to recycle the  future . Take a look and hopefully you can pull it into your code: 
 
  import concurrently. Future Import Scale. Insertion Promotional import concurrent Execution Contex Impulse ._ Import scale. Cancun Avate import concurrent period ._ case class person (id: long, name: string, children: option [list] long]] object recurssto app {vel each = map (1l -> person (1, "grandfather" , Some (list (3, "Kaka Joe", some (list (6, 2, 2) - (2, 2) - (2, "father", some (list (4,5)), 3l - Person (5, "Sis", none), 6L -> person (6, "cousin fried", none), 4L -> person (4, "me", none ), 5L ->, 7L -> Individuals (7, "Cousin Marie", none)) val f = getFamilMembers // Do not result in actual code val = await.result (f, 5 seconds) println (result) def getFamilMembers (): future [list [string]] = {var name : List [String] = List.empty val prom = Promise [List [String]] Def Richer (Eyes: List [Long]) {IDEd.Addedoption Match {// This Recording Exit Point Case is None & gt; Prom. Success (names.reverse) case some (id) = & gt; GetPerson (id) map {p = & gt; Names = p.name :: names val childIds = p.children.getOrElse (List.empty) recurse (IDs. Tail ++ childIds)}} recurse (list (1) prom.future} def getPerson (id: long): future [person] = {future suffering person =. (Id). Print Print ("Loaded:" + p.name) p}}}

Comments

Post a Comment

Popular posts from this blog

import - Python ImportError: No module named wmi -

-
I followed the instructions for downloading WMI for Python When I try to run the code for C.Win32_Service (StartMode = "Auto", state = "Stopped") import wmi c = wmi.WMI (): if Raw_input ("restart% s?"% S.Caption) .upper () == "Y": s.StartService () I got the error < Code> traceback (most recent call end): file ". \", Line 1, edit: I am using Python 2.7.6 EDIT2: I am running 64-bit Windows 2008 R2, and I've downloaded WMI-1.4.9.zip (md5). I removed the content and put it in D: Python \ Tools \ Scripts I executed dragon setup.py.install I said D : \ Python \ tools \ scripts to% PATH% and when I execute the code for C.Win32_Service (StartMode = "Auto", state = "Stopped") import wmi c = Wmi.WMI (): If raw_input ("Restart% s?"% S. Caption). () == "Y": s.StartService () error me Gets traceback (most recent call final): File ". See \", line 1, &
Read more

Editing Python Class in Shell and SQLAlchemy -

-
I am working on the terminal on a shell script after this tutorial SQLAlchemy tutorial. I need to type gt; & Gt; & Gt; Sqlalchemy import column, integer, string & gt; & Gt; & Gt; Class user (base): __tablename__ = 'users' id = column (integer, primary_key = true) name = column (string) absolute name = column (string) password = column (string) def __repr __ (self): return "& lt ; User (name = '% s', absolute name = '% s', password = '% s') & gt; "% (Self.name, self.fullname, self.password) After the problem I have typed the password = column (string) I hit twice and changed .... >> I then took everything back but then an error was thrown because the class already exists ... I am not completely sure how to fix it. How do I open that slip in the shell script and edit it (Add DF to DRR) The error thrown below: / user / giripeters / TFSQLLX / Lib / python2.7 / site-packages / sqlalchemy / ext / decla
Read more

c# - MySQL Parameterized Select Query joining tables issue -

-
I am using parameterized select questions in conjunction with my program and it works entirely, When I try to join the table Everything I have done is a small fraction: using (MySqlCommand cmd = new MySqlCommand (paramQuery) ToSql (), Connection)) /etc/ paramQuery.ToSql () Equal: "Select TableOne ID, Tableon, Department, Tablet. One by name table, Table 2 h Yes TableOnEID = @Pharmak "* / for (Int Index = 0; Index and Lt; ParamariX Parameter (.c calculation; Index ++) Cmd.Parameters.AddWithValue (paramQuery.Parameters (). ElementAt (index). , ParamQuery.Parameters (). ElementAt (index) .Value); / * ParamQuery.Parameters (). ElementAt (index) .k = "@most 0" paramQuery.Parameters (). ElementAt (index) .Value = "tableTwo.ID" * / MySqlDataReader Reader = cmd.ExecuteReader (); While (reader.Read ()) {// do stuff} } One of the tables I attempt to join is For the table, two with the same id for all. Is there something that I'm doing wrong?
Read more