joecwu

import java.io._
import java.util.zip._

val pi = new PipedInputStream        
val po = new PipedOutputStream(pi)
val zo = new GZIPOutputStream(po)
val zi = new GZIPInputStream(pi)
val w  = new PrintWriter(zo)
val r  = new BufferedReader(new InputStreamReader(zi))

joecwu

val list=List(1,2,3,4,5)
//list: List[Int] = List(1, 2, 3, 4, 5)

joecwu

case class TracerId(tid:String)
object TestApp {
  implicit val tracerId = TracerId(java.util.UUID.randomUUID().toString) // tracerId can be defined and retrieved from HTTP request header.
  
  def run(){
    methodA(1)
    methodB
  }
  
  def methodA(i:Int)(implicit tracerId:TracerId) = {

joecwu

case class GetArticleRequest(id:String,country:String,language:String)
 
def parseRequest(queryStr:String) = {
    // parse arguments
    val args = queryStr.split('&') map { str =>
      val pair = str.split('=')
      (pair(0) -> pair(1))
    } toMap
    // get 'id','country','language' and gen GetArticleRequest object
    val resp = for{

joecwu

import com.joecwu.jcwutil.ObjFormatter._

object TestApp {
  def run = {
    implicit def timeZone = TIMEZONE_UTC
    println(System.currentTimeMillis().toStringRFC3339)
    println(System.currentTimeMillis().toStringISO8601)
  }
}

joecwu

case class Error(code:Int, msg:String)
case class User(id:String,name:String)

object UserRepo{
  def find(id:String) : Option[User] = {None}
  
  def getUser(id:String) : Either[Error,User] = {
    find(id).map(Right(_)).getOrElse(Left(Error(404,s"User not found. id:[$id]")))
  }
}

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case class InvalidArgumentException(msg:String) extends Exception(msg)

case class SearchUsersRequest(keyword: Option[String], userType: Option[Int], maxNum: Option[Int], returnFields: List[String]) {
  def getKeywork() = keyword | {throw InvalidArgumentException("keyword cannot be empyt.")}
  def getUserType() = {
    userType.map{ tp => (1 until 10 contains tp) ? tp | {throw InvalidArgumentException("userType must between 1 to 10.")}} |{ throw InvalidArgumentException("userType cannot be empyt.")}
  }
  def getMaxNum() = maxNum.getOrElse(10)
  def getReturnFields() = (returnFields.length > 0) ? returnFields | {throw InvalidArgumentException("must provide returnFields.")}
}

joecwu

Publish Artifacts to Sonatype Nexus Repository by using SBT

Install PGP plugin Reference

For sbt 0.13.5+: Add the following to your ~/.sbt/0.13/plugins/gpg.sbt file:

addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.0.0")

PGP Gen Key Reference

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case class HttpRequest(path:String, queryStrings:Map[String,List[String]]) {
  def getPath() : String Or String = if(path.length>0) Good(path) else Bad("path cannot be empty.")
  def getQueryStrings() : ((List[String], Int), String) Or Every[String] = {
    validateKeyword(queryString.get("keyword")) zip validateNumber(queryString.get("number")) zip validateGender(queryString.get("gender"))
  }
  def validateKeyword(value:Option[List[String]]) : List[String] Or One[String] = {
    if(value.isDefined && value.get.length>0) Good(value.get) else Bad(One("No keyword."))
  }
  def validateNumber(value:Option[List[String]]) : Int Or One[String] = {
    try{

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val a : Option[String] = Some("abc")

if(a.isEmpty)
  println("do something if a has value "+a.get)
else
  println("do something if a is empty")