basic SwapFile implementation

package com.fnordmetric.enterprise

import java.io.RandomAccessFile

import java.io.File

import java.nio.ByteBuffer

import java.nio.ByteOrder

class SwapFile() {

class SwapFile(metric_key: MetricKey) {

  val file = new File(FnordMetric.CONFIG('swap_prefix),

    "fnord.txt")

  val file_name = "metric-" + metric_key.key +

    metric_key.mode + "-" + metric_key.flush_interval

  val file = new RandomAccessFile(new File(

    FnordMetric.CONFIG('swap_prefix), file_name), "rwd")

  val buffer = ByteBuffer.allocate(512)

  buffer.order(ByteOrder.BIG_ENDIAN)

  def put(time: Long, value: Double) : Unit = {

    val bvalue = java.lang.Double.doubleToLongBits(value)

    if (buffer.remaining < 18)

      flush

    buffer.putShort(0x1717)

    buffer.putLong(time)

    buffer.putLong(bvalue)

  }

  def flush : Unit = {

    file.seek(file.length)

    file.write(buffer.array)

    buffer.rewind

  }

}