File Appender in Scala

FileAppender.scala

/*
 * Copyright (c) 2012 Ansvia Inc.
 * Author: robin
 */

package com.ansvia.rootr.storage

import java.io.{FileWriter, BufferedWriter, File}

/**
 * File appender is logger like engine
 * that allow you to store data to a file by appending.
 * The write operation using buffered writer where
 * every write buffered and flushing after `max` count.
 * If file doesn't exists, file appender will created one
 * otherwise file appender will just open a file in append mode.
 * @param filePath file path to write.
 * @param max max count where data will be flushed.
 */
class FileAppender(filePath:String, max:Int=5) {

  private val maxFlushCount = max
  private var count = 0

  private lazy val writer:BufferedWriter = {
    val f = new File(filePath)
    if (!f.exists()){
      f.createNewFile()
    }
    new BufferedWriter(new FileWriter(f, true))
  }

  /**
   * Write string into file.
   * @param str string to write.
   */
  def write(str:String){
    writer.write(str)
    count += 1
    if (count > maxFlushCount){
      writer.flush()
      count = 0
    }
  }

  /**
   * Write string into file with trailing new line.
   * @param str string to write.
   */
  def writeln(str:String){

    writer.write(str)
    writer.newLine()
    count += 1
    if (count > maxFlushCount){
      writer.flush()
      count = 0
    }

  }

}