Monthly Archives: November 2015

SBT Good to know…

November 5, 2015SBT, Scalatobias

Dependecy problems

I have been having some difficulties figuring out what depends on what. I found the following set plugins which I think can be really helpful;

https://github.com/jrudolph/sbt-dependency-graph

and

https://github.com/gilt/sbt-dependency-graph-sugar

Be sure to install GraphWiz first, I used Homebrew on my Mac

brew install graphviz

and I also had to create a config file

mkdir ~/.sbt/gilt
vi ~/.sbt/gilt/sbt-dependency-graph-sugar-cmd

1 2	mkdir ~/.sbt/gilt vi ~/.sbt/gilt/sbt-dependency-graph-sugar-cmd

with the following content

open -a Safari $1

1	open -a Safari $1

The readme explains how to use it pretty well, simply start sbtÂ CLI

Tobiass-MBP:projectX tobias$ sbt
[info] Loading global plugins from /Users/tobias/.sbt/0.13/plugins
[info] Updating {file:/Users/tobias/.sbt/0.13/plugins/}global-plugins...
Waiting for lock on /Users/tobias/.ivy2/.sbt.ivy.lock to be available...
[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[info] Done updating.
[info] Loading project definition from /Users/tobias/qvantel/projectX/project
Waiting for lock on /Users/tobias/.ivy2/.sbt.ivy.lock to be available...
[info] Set current project to projectX (in build file:/Users/tobias/qvantel/projectX/)
> dependencySvgView

Tobiass-MBP:projectX tobias$ sbt

[info] Loading global plugins from /Users/tobias/.sbt/0.13/plugins

[info] Updating {file:/Users/tobias/.sbt/0.13/plugins/}global-plugins...

Waiting for lock on /Users/tobias/.ivy2/.sbt.ivy.lock to be available...

[info] Resolving org.fusesource.jansi#jansi;1.4 ...

[info] Done updating.

[info] Loading project definition from /Users/tobias/qvantel/projectX/project

Waiting for lock on /Users/tobias/.ivy2/.sbt.ivy.lock to be available...

[info] Set current project to projectX (in build file:/Users/tobias/qvantel/projectX/)

> dependencySvgView

It will give you a graph that looks something like this (it is in SVG format so it is searchable!!!) Now you should see which package/jar is using which, and also where the different versions clash…

Show the class path for the run command

Tobiass-MBP:projectX tobias$ sbt
[info] Loading global plugins from /Users/tobias/.sbt/0.13/plugins
[info] Loading project definition from /Users/tobias/qvantel/projectX/project
[info] Set current project to projectX (in build file:/Users/tobias/qvantel/projectX/)
> show runtime:fullClasspath
[info] Updating {file:/Users/tobias/qvantel/projectX/}projectx...
[info] Resolving jline#jline;2.12.1 ...
[info] Done updating.
[info] List(Attributed(/Users/tobias/qvantel/projectX/target/scala-2.11/classes), Attributed(/Users/tobias/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.7.jar), Attributed(/Users/tobias/.ivy2/cache/org.slf4j/slf4j-api/jars/slf4j-api-1.7.10.jar), Attributed(/Users/tobias/.ivy2/cache/ch.qos.logback/logback-core/jars/logback-core-1.1.3.jar), Attributed(/Users/tobias/.ivy2/cache/ch.qos.logback/logback-classic/jars/logback-classic-1.1.3.jar), Attributed(/Users/tobias/.ivy2/cache/io.kamon/kamon-core_2.11/jars/kamon-core_2.11-0.5.2.jar), Attributed(/Users/tobias/.ivy2/cache/com.typesafe.akka/akka-actor_2.11/jars/akka-actor_2.11-2.3.14.jar), Attributed(/Users/tobias/.ivy2/cache/com.typesafe/config/bundles/config-1.2.1.jar), Attributed(/Users/tobias/.ivy2/cache/org.hdrhistogram/HdrHistogram/bundles/HdrHistogram-2.1.7.jar), Attributed(/Users/tobias/.ivy2/cache/io.kamon/kamon-akka_2.11/jars/kamon-akka_2.11-0.5.2.jar), Attributed(/Users/tobias/.ivy2/cache/io.kamon/kamon-scala_2.11/jars/kamon-scala_2.11-0.5.2.jar), Attributed(/Users/tobias/.ivy2/cache/io.kamon/kamon-spray_2.11/jars/kamon-spray_2.11-0.5.2.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-can_2.11/bundles/spray-can_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-io_2.11/bundles/spray-io_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-util_2.11/bundles/spray-util_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-http_2.11/bundles/spray-http_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/org.parboiled/parboiled-scala_2.11/jars/parboiled-scala_2.11-1.1.7.jar), Attributed(/Users/tobias/.ivy2/cache/org.parboiled/parboiled-core/jars/parboiled-core-1.1.7.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-client_2.11/bundles/spray-client_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-httpx_2.11/bundles/spray-httpx_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/org.scala-lang.modules/scala-xml_2.11/bundles/scala-xml_2.11-1.0.3.jar), Attributed(/Users/tobias/.ivy2/cache/org.jvnet.mimepull/mimepull/jars/mimepull-1.9.5.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-routing_2.11/bundles/spray-routing_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/com.chuusai/shapeless_2.11/jars/shapeless_2.11-1.2.4.jar), Attributed(/Users/tobias/.ivy2/cache/org.aspectj/aspectjweaver/jars/aspectjweaver-1.8.7.jar))
[success] Total time: 1 s, completed Nov 5, 2015 10:21:30 AM
> 
>

Tobiass-MBP:projectX tobias$ sbt

[info] Loading global plugins from /Users/tobias/.sbt/0.13/plugins

[info] Loading project definition from /Users/tobias/qvantel/projectX/project

[info] Set current project to projectX (in build file:/Users/tobias/qvantel/projectX/)

> show runtime:fullClasspath

[info] Updating {file:/Users/tobias/qvantel/projectX/}projectx...

[info] Resolving jline#jline;2.12.1 ...

[info] Done updating.

[info] List(Attributed(/Users/tobias/qvantel/projectX/target/scala-2.11/classes), Attributed(/Users/tobias/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.7.jar), Attributed(/Users/tobias/.ivy2/cache/org.slf4j/slf4j-api/jars/slf4j-api-1.7.10.jar), Attributed(/Users/tobias/.ivy2/cache/ch.qos.logback/logback-core/jars/logback-core-1.1.3.jar), Attributed(/Users/tobias/.ivy2/cache/ch.qos.logback/logback-classic/jars/logback-classic-1.1.3.jar), Attributed(/Users/tobias/.ivy2/cache/io.kamon/kamon-core_2.11/jars/kamon-core_2.11-0.5.2.jar), Attributed(/Users/tobias/.ivy2/cache/com.typesafe.akka/akka-actor_2.11/jars/akka-actor_2.11-2.3.14.jar), Attributed(/Users/tobias/.ivy2/cache/com.typesafe/config/bundles/config-1.2.1.jar), Attributed(/Users/tobias/.ivy2/cache/org.hdrhistogram/HdrHistogram/bundles/HdrHistogram-2.1.7.jar), Attributed(/Users/tobias/.ivy2/cache/io.kamon/kamon-akka_2.11/jars/kamon-akka_2.11-0.5.2.jar), Attributed(/Users/tobias/.ivy2/cache/io.kamon/kamon-scala_2.11/jars/kamon-scala_2.11-0.5.2.jar), Attributed(/Users/tobias/.ivy2/cache/io.kamon/kamon-spray_2.11/jars/kamon-spray_2.11-0.5.2.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-can_2.11/bundles/spray-can_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-io_2.11/bundles/spray-io_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-util_2.11/bundles/spray-util_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-http_2.11/bundles/spray-http_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/org.parboiled/parboiled-scala_2.11/jars/parboiled-scala_2.11-1.1.7.jar), Attributed(/Users/tobias/.ivy2/cache/org.parboiled/parboiled-core/jars/parboiled-core-1.1.7.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-client_2.11/bundles/spray-client_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-httpx_2.11/bundles/spray-httpx_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/org.scala-lang.modules/scala-xml_2.11/bundles/scala-xml_2.11-1.0.3.jar), Attributed(/Users/tobias/.ivy2/cache/org.jvnet.mimepull/mimepull/jars/mimepull-1.9.5.jar), Attributed(/Users/tobias/.ivy2/cache/io.spray/spray-routing_2.11/bundles/spray-routing_2.11-1.3.3.jar), Attributed(/Users/tobias/.ivy2/cache/com.chuusai/shapeless_2.11/jars/shapeless_2.11-1.2.4.jar), Attributed(/Users/tobias/.ivy2/cache/org.aspectj/aspectjweaver/jars/aspectjweaver-1.8.7.jar))

[success] Total time: 1 s, completed Nov 5, 2015 10:21:30 AM

Create an MBean (JMX) in Scala

November 3, 2015Uncategorizedtobias

Create the MBean like this

trait OrderTrackerMBean {
  def getOrderId : Int
  def setOrderId(orderId:Int)
}

class OrderTracker extends OrderTrackerMBean {
  var orderId = 0
  override def getOrderId: Int = orderId
  override def setOrderId(_orderId: Int)= {
    orderId = _orderId
  }

}

trait OrderTrackerMBean {

def getOrderId : Int

def setOrderId(orderId:Int)

}

class OrderTracker extends OrderTrackerMBean {

var orderId = 0

override def getOrderId: Int = orderId

override def setOrderId(_orderId: Int)= {

orderId = _orderId

}

NOTE, that the interface/trait must end with MBean in the name

And this is how you register your MBean

package com.tsoft.playingWithLogback

import java.lang.management.ManagementFactory
import javax.management.{ObjectName, MBeanServer}

import org.slf4j.{MarkerFactory, Marker, LoggerFactory}
import org.slf4j.MDC
import scala.concurrent.{Await, Future}
import scala.concurrent.duration._
import scala.concurrent.ExecutionContext.Implicits.global

object LotsOfLogOutput {

  val logger = LoggerFactory.getLogger(this.getClass)

  val orderTrackerBean = new OrderTracker
  val mbs:MBeanServer = ManagementFactory.getPlatformMBeanServer();
  val mBeanName:ObjectName = new ObjectName("com.tsoft.playingWithLogback:type=Tracking");
  mbs.registerMBean( orderTrackerBean, mBeanName);

...

package com.tsoft.playingWithLogback

import java.lang.management.ManagementFactory

import javax.management.{ObjectName, MBeanServer}

import org.slf4j.{MarkerFactory, Marker, LoggerFactory}

import org.slf4j.MDC

import scala.concurrent.{Await, Future}

import scala.concurrent.duration._

import scala.concurrent.ExecutionContext.Implicits.global

object LotsOfLogOutput {

val logger = LoggerFactory.getLogger(this.getClass)

val orderTrackerBean = new OrderTracker

val mbs:MBeanServer = ManagementFactory.getPlatformMBeanServer();

val mBeanName:ObjectName = new ObjectName("com.tsoft.playingWithLogback:type=Tracking");

mbs.registerMBean( orderTrackerBean, mBeanName);

...

And the simply launch Java Mission Control (imc), attach to the JVM, and modify your MBean attributes as you like.

Enjoy!

SBT module not found, why ?

November 3, 2015Uncategorizedtobias

I have an build.sbt file that looks like this

name := "TobiasPlayground"

version := "1.0"

scalaVersion := "2.11.7"

scalacOptions := Seq("-unchecked", "-deprecation", "-encoding", "utf8")

libraryDependencies ++= {
  val akkaV = "2.3.9"
  val sprayV = "1.3.3"
  Seq(
    "io.spray"            %%  "spray-client"  % sprayV,
    "io.spray"            %%  "spray-can"     % sprayV,
    "io.spray"            %%  "spray-routing" % sprayV,
    "io.spray"            %%  "spray-testkit" % sprayV  % "test",
    "com.typesafe.akka"   %%  "akka-actor"    % akkaV,
    "com.typesafe.akka"   %%  "akka-testkit"  % akkaV   % "test",
    "org.specs2"          %%  "specs2-core"   % "2.3.11" % "test",
    "org.slf4j"           %%   "slf4j-api"      % "1.7.10"
  )
}

name := "TobiasPlayground"

version := "1.0"

scalaVersion := "2.11.7"

scalacOptions := Seq("-unchecked", "-deprecation", "-encoding", "utf8")

libraryDependencies ++= {

val akkaV = "2.3.9"

val sprayV = "1.3.3"

Seq(

"io.spray" %% "spray-client" % sprayV,

"io.spray" %% "spray-can" % sprayV,

"io.spray" %% "spray-routing" % sprayV,

"io.spray" %% "spray-testkit" % sprayV % "test",

"com.typesafe.akka" %% "akka-actor" % akkaV,

"com.typesafe.akka" %% "akka-testkit" % akkaV % "test",

"org.specs2" %% "specs2-core" % "2.3.11" % "test",

"org.slf4j" %% "slf4j-api" % "1.7.10"

)

}

But for some reason I can’t get slf4j downloaded from the Maven repository (http://mvnrepository.com)

If I search the Maven Repository, I can clearly see that the version I intend to use is there.

Running “sbt compile” from the command line will result in the following output, and here it is time to pay attention to the details, look at what it is trying to do !!!

Tobiass-MBP:TobiasPlayground tobias$ sbt compile
[info] Loading project definition from /Users/tobias/qvantel/TobiasPlayground/project
Waiting for lock on /Users/tobias/.ivy2/.sbt.ivy.lock to be available...
[info] Set current project to TobiasPlayground (in build file:/Users/tobias/qvantel/TobiasPlayground/)
[info] Updating {file:/Users/tobias/qvantel/TobiasPlayground/}tobiasplayground...
Waiting for lock on /Users/tobias/.ivy2/.sbt.ivy.lock to be available...
[info] Resolving org.slf4j#slf4j-api_2.11;1.7.10 ...
[warn] 	module not found: org.slf4j#slf4j-api_2.11;1.7.10
[warn] ==== local: tried
[warn]   /Users/tobias/.ivy2/local/org.slf4j/slf4j-api_2.11/1.7.10/ivys/ivy.xml
[warn] ==== jcenter: tried
[warn]   https://jcenter.bintray.com/org/slf4j/slf4j-api_2.11/1.7.10/slf4j-api_2.11-1.7.10.pom
[warn] ==== public: tried
[warn]   https://repo1.maven.org/maven2/org/slf4j/slf4j-api_2.11/1.7.10/slf4j-api_2.11-1.7.10.pom
[info] Resolving jline#jline;2.12.1 ...
[warn] 	::::::::::::::::::::::::::::::::::::::::::::::
[warn] 	::          UNRESOLVED DEPENDENCIES         ::
[warn] 	::::::::::::::::::::::::::::::::::::::::::::::
[warn] 	:: org.slf4j#slf4j-api_2.11;1.7.10: not found
[warn] 	::::::::::::::::::::::::::::::::::::::::::::::
[warn] 
[warn] 	Note: Unresolved dependencies path:
[warn] 		org.slf4j:slf4j-api_2.11:1.7.10 (/Users/tobias/qvantel/TobiasPlayground/build.sbt#L9-27)
[warn] 		  +- default:tobiasplayground_2.11:1.0

Tobiass-MBP:TobiasPlayground tobias$ sbt compile

[info] Loading project definition from /Users/tobias/qvantel/TobiasPlayground/project

Waiting for lock on /Users/tobias/.ivy2/.sbt.ivy.lock to be available...

[info] Set current project to TobiasPlayground (in build file:/Users/tobias/qvantel/TobiasPlayground/)

[info] Updating {file:/Users/tobias/qvantel/TobiasPlayground/}tobiasplayground...

Waiting for lock on /Users/tobias/.ivy2/.sbt.ivy.lock to be available...

[info] Resolving org.slf4j#slf4j-api_2.11;1.7.10 ...

[warn] module not found: org.slf4j#slf4j-api_2.11;1.7.10

[warn] ==== local: tried

[warn] /Users/tobias/.ivy2/local/org.slf4j/slf4j-api_2.11/1.7.10/ivys/ivy.xml

[warn] ==== jcenter: tried

[warn] https://jcenter.bintray.com/org/slf4j/slf4j-api_2.11/1.7.10/slf4j-api_2.11-1.7.10.pom

[warn] ==== public: tried

[warn] https://repo1.maven.org/maven2/org/slf4j/slf4j-api_2.11/1.7.10/slf4j-api_2.11-1.7.10.pom

[info] Resolving jline#jline;2.12.1 ...

[warn] ::::::::::::::::::::::::::::::::::::::::::::::

[warn] :: UNRESOLVED DEPENDENCIES ::

[warn] ::::::::::::::::::::::::::::::::::::::::::::::

[warn] :: org.slf4j#slf4j-api_2.11;1.7.10: not found

[warn] ::::::::::::::::::::::::::::::::::::::::::::::

[warn]

[warn] Note: Unresolved dependencies path:

[warn] org.slf4j:slf4j-api_2.11:1.7.10 (/Users/tobias/qvantel/TobiasPlayground/build.sbt#L9-27)

[warn] +- default:tobiasplayground_2.11:1.0

As you can see above the package (jar) it tries to download is not slf4j-api it is slf4j-api_2.11;1.7.10

The build.sbt file uses the double and single % (percent) character and this is what makes the difference. Â The %% makes SBT append the project specified scala version to the package name, resulting in a name “slf4j-api_2.11”.

BUT that name does not exist in the Maven Repository, however, the “slf4j-api” does

So by simply choosing one instead of two %, the problem will go away 🙂

Thus, the built.sbt should look like this instead

name := "TobiasPlayground"

version := "1.0"

scalaVersion := "2.11.7"

scalacOptions := Seq("-unchecked", "-deprecation", "-encoding", "utf8")

libraryDependencies ++= {
  val akkaV = "2.3.9"
  val sprayV = "1.3.3"
  Seq(
    "io.spray"            %%  "spray-client"  % sprayV,
    "io.spray"            %%  "spray-can"     % sprayV,
    "io.spray"            %%  "spray-routing" % sprayV,
    "io.spray"            %%  "spray-testkit" % sprayV  % "test",
    "com.typesafe.akka"   %%  "akka-actor"    % akkaV,
    "com.typesafe.akka"   %%  "akka-testkit"  % akkaV   % "test",
    "org.specs2"          %%  "specs2-core"   % "2.3.11" % "test",
    "org.slf4j"           %   "slf4j-api"      % "1.7.10"
  )
}

name := "TobiasPlayground"

version := "1.0"

scalaVersion := "2.11.7"

scalacOptions := Seq("-unchecked", "-deprecation", "-encoding", "utf8")

libraryDependencies ++= {

val akkaV = "2.3.9"

val sprayV = "1.3.3"

Seq(

"io.spray" %% "spray-client" % sprayV,

"io.spray" %% "spray-can" % sprayV,

"io.spray" %% "spray-routing" % sprayV,

"io.spray" %% "spray-testkit" % sprayV % "test",

"com.typesafe.akka" %% "akka-actor" % akkaV,

"com.typesafe.akka" %% "akka-testkit" % akkaV % "test",

"org.specs2" %% "specs2-core" % "2.3.11" % "test",

"org.slf4j" % "slf4j-api" % "1.7.10"

)

}

For reference go toÂ https://www.playframework.com/documentation/2.1.1/SBTDependenciesÂ to read more about how SBT handles decencies and the % and %%.

I read this article to finally get this rightÂ http://stackoverflow.com/questions/17461453/build-scala-and-symbols-meaning

tsoft.se

Tobias – With a Passion For Software Development

Monthly Archives: November 2015

SBT Good to know…

Dependecy problems

Show the class path for the run command

Create an MBean (JMX) in Scala

SBT module not found, why ?