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com.metamx.common.scala.pretty.scala Maven / Gradle / Ivy
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/*
* Copyright 2012 Metamarkets Group Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.metamx.common.scala
object pretty {
// Truncate a string with "...". Useful for stuffing potentially huge .toString's into log lines.
def truncate(s: String, n: Int = 500): String = if (s.length > n) s.take(n) + "..." else s
// e.g. parseBytes("5 GB") == 5L * 1024*1024*1024
def parseBytes(s: String): Long = ("""\s*(\d+)\s*([A-Z]+)?\s*""".r.unapplySeq(s) : @unchecked) match {
case None => throw new IllegalArgumentException("Can't parse bytes: %s" format s)
case Some(List(n, null)) => parseBytes(s + "B")
case Some(List(n, suf)) => Seq("B","KB","MB","GB","TB","PB","EB","ZB","YB","BB").indexOf(suf) match {
case -1 => throw new IllegalArgumentException("Unknown bytes suffix %s in: %s" format (suf, s))
case exp => n.toLong * math.pow(1024L, exp).toLong
}
}
}