jvm - Why can I not pickle my case classes? What should I do to solve this manually next time? -

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edit 2: observations , questions

  1. i pretty sure along commenter below justin problem due errant build.sbt configuration. however, first time have seen errant build.sbt configuration literally works everything else except pickers. maybe becaus use macros , rule avoid them.

  2. why matter whether flow.merge used vs flow.map if problem sbt?

  3. suspicious build.sbt extract

    lazy val server = project .dependson(sharedjvm, client)

  4. suspicious stack trace

so top of stack: goes method cannot find linking environment string encoding utils. ok.

server java.lang.runtimeexception: stub

huh? stub?

server  @ scala.sys.package$.error(package.scala:27) server  @ scala.scalajs.runtime.package$.linkinginfo(package.scala:143) server  @ scala.scalajs.runtime.package$.environmentinfo(package.scala:137)

huh?

server  @ scala.scalajs.js.dynamic$.global(dynamic.scala:78)

???

server  @ boopickle.stringcodec$.encodeutf8(stringcodec.scala:56)

edit 1: big , beautiful build.sbt might problem

what cannot see organized in project folder:

  • jvmdependencies.scala has regular jvm dependencies
  • sjsdependencies.scala has def.settingskeys of librarydependencies on jsmoduleids
  • webjardependencies.scala has javascripts , css's

build.sbt

lazy val    shared = (crossproject.crosstype(crosstype.pure) in file("shared"))   .configure(_.enableplugins(scalajsplugin))   .settings(sjsdependencies.pickling.tosettingsdefinition(): _*)   .settings(sjsdependencies.tagsanddom.tosettingsdefinition(): _*)   .settings(sjsdependencies.css.tosettingsdefinition(): _*)  lazy val sharedjvm = shared.jvm lazy val  sharedjs = shared.js  lazy val    cmdlne = project   .dependson(sharedjvm)   .settings(     librarydependencies ++= (       jvmdependencies.commandline ++       jvmdependencies.logging     ++       jvmdependencies.akka        ++       jvmdependencies.serialization     )   )  lazy val    client = project   .enableplugins(scalajsplugin, sbtweb, sbtsass)   .dependson(sharedjs)   .settings(     (sjsdependencies.shapeless ++ sjsdependencies.audiovideo ++ sjsdependencies.databind ++ sjsdependencies.functional ++ sjsdependencies.lensing ++ sjsdependencies.logging ++ sjsdependencies.reactive).tosettingsdefinition(),     jsdependencies ++= webjardependencies.js,     librarydependencies ++= webjardependencies.notjs,     persistlauncher in compile := true   )  lazy val    server = project   .dependson(sharedjvm, client)   .enableplugins(sbtnativepackager)   .settings(      copywebjarresources := { streams.value.log("copying webjar resources")       val `web modules target directory` = (resourcemanaged in compile).value / "assets"       val `web modules source directory` = (webkeys.assets in assets in client).value / "lib"        final class usefulfilefilter(acceptable: string*) extends filefilter {          // todo adjust exclude js map files         import scala.collection.javaconversions._         def accept(file: file) = (file.isdirectory && fileutils.listfiles(file, acceptable.toarray, true).nonempty) || acceptable.contains(file.ext) && !file.name.contains(".js.")       }        val `file filter` = new usefulfilefilter("css", "scss", "sass", "less", "map")        io.createdirectory(`web modules target directory`)       io.copydirectory(source = `web modules source directory`, target = `web modules target directory` / "script")       fileutils.copydirectory(`web modules source directory`, `web modules target directory` / "style", `file filter`)     },      // run copy after compile/assets before managed resources     copywebjarresources <<= copywebjarresources dependson(compile in compile, webkeys.assets in compile in client, fastoptjs in compile in client),     managedresources in compile <<= (managedresources in compile) dependson copywebjarresources,      watchsources <++= (watchsources in client),       resourcegenerators in compile <+= def.task {       val files = ((crosstarget in(client, compile)).value ** ("*.js" || "*.map")).get       val mappings: seq[(file,string)] = files pair rebase((crosstarget in(client, compile)).value, ((resourcemanaged in  compile).value / "assets/").getabsolutepath )       val map: seq[(file, file)] = mappings.map { case (s, t) => (s, file(t))}       io.copy(map).toseq     },      restart <<= restart dependson (managedresources in compile),      librarydependencies ++= (       jvmdependencies.akka                ++       jvmdependencies.jarlocating         ++       jvmdependencies.functional          ++       jvmdependencies.serverpickling      ++       jvmdependencies.logging             ++       jvmdependencies.serialization       ++       jvmdependencies.testing     )   )

edit 0: obscure chat thread has guy saying feeling: no, not **** scala, but

mark eibes @i-am-the-slime oct 15 2015 09:37 @ochrons i'm still fighting. can't seem pickle anymore. https://gitter.im/scala-js/scala-js/archives/2015/10/15

i have rather simple requirement - have 1 web socket route on akka http server defined akkaserverlogeventtomessagehandler():

object akkaserverlogeventtomessagehandler   extends directives {    val sourceoflogs =      source.actorpublisher[akkaserverlogmessage](akkaserverlogeventpublisher.props) map {       event ⇒         binarymessage(           bytestring(             pickle.intobytes[akkaserverlogmessage](event)           )         )     }    def apply(): server.route = {     handlewebsocketmessages(       flow[message].merge(sourceoflogs)     )   }  }

this fits tiny set of routes in obvious way.

now why cannot boopickle, upickle, or prickle serialize simple stupid case class?

sealed case class akkaserverlogmessage(                                  message:   string,                                  level:     int,                                  timestamp: long                                )
  • no nesting
  • all primitive types
  • no generics
  • only 3 of them

these produced same error

  • using 3 of common picklers write
  • using textmessage instead of binarymessage , corresponding upickle or prickle writejs or whatever methods
  • varying case class down nothing (nothing, in no members)
  • varying input case class
  • importing various permutations of implicits , underscore stuff

... specifically, gave me variations on same stupid error (not same error, considerably similar)

server [error] [04/21/2016 22:04:00.362] [app-akka.actor.default-dispatcher-7] [akka.actor.actorsystemimpl(app)] websocket handler failed stub server java.lang.runtimeexception: stub server  @ scala.sys.package$.error(package.scala:27) server  @ scala.scalajs.runtime.package$.linkinginfo(package.scala:143) server  @ scala.scalajs.runtime.package$.environmentinfo(package.scala:137) server  @ scala.scalajs.js.dynamic$.global(dynamic.scala:78) server  @ boopickle.stringcodec$.encodeutf8(stringcodec.scala:56) server  @ boopickle.encoder.writestring(codecs.scala:338) server  @ boopickle.basicpicklers$stringpickler$.pickle(pickler.scala:183) server  @ boopickle.basicpicklers$stringpickler$.pickle(pickler.scala:134) server  @ boopickle.picklestate.pickle(pickler.scala:511) server  @ shindig.clientaccess.handler.akkaserverlogeventtomessagehandler$$anonfun$1$pickler$macro$1$2$.pickle(akkaserverlogeventtomessagehandler.scala:35) server  @ shindig.clientaccess.handler.akkaserverlogeventtomessagehandler$$anonfun$1$pickler$macro$1$2$.pickle(akkaserverlogeventtomessagehandler.scala:35) server  @ boopickle.pickleimpl$.apply(default.scala:70) server  @ boopickle.pickleimpl$.intobytes(default.scala:75) server  @ shindig.clientaccess.handler.akkaserverlogeventtomessagehandler$$anonfun$1.apply(akkaserverlogeventtomessagehandler.scala:35) server  @ shindig.clientaccess.handler.akkaserverlogeventtomessagehandler$$anonfun$1.apply(akkaserverlogeventtomessagehandler.scala:31)

this worked

  • not using flow.merge (defeats purpose, want keep sending out put logs)
  • using static value
  • other useless things

appeal

please let me know , why stupid... spent 4 hours on problem today in different forms, , driving me nuts.

in build.sbt, have:

lazy val shared = (crossproject.crosstype(crosstype.pure) in file("shared"))   .configure(_.enableplugins(scalajsplugin))

do not this. must not enable scala.js plugin on cross-project, ever. adds jvm side, wreak havoc. notably, cause %%% resolve scala.js artifacts of dependencies in jvm project, , bad. causes issue.

crossproject adds scala.js plugin js part, , one. remove enableplugins line.


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