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Trace.scala
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Trace.scala
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/*
* Copyright 2020-2022 Typelevel
*
* 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 cats.effect
import cats.effect.tracing.{RingBuffer, Tracing}
final class Trace private (frames: List[StackTraceElement]) {
private[this] def renderStackTraceElement(ste: StackTraceElement): String = {
s"${ste.getClassName}.${ste.getMethodName} (${ste.getFileName}:${ste.getLineNumber})"
}
def pretty: String = {
val TurnRight = "╰"
val Junction = "├"
var captured = 0
val indexedRenderedStackTrace = frames.map { frame =>
val res = renderStackTraceElement(frame) -> captured
captured += 1
res
}
val acc0 = s"Trace: ${captured} frames captured\n"
val acc1 = indexedRenderedStackTrace
.map {
case (tag, index) =>
if (index == 0) s"$Junction $tag"
else if (index == captured - 1) s"$TurnRight $tag"
else s"$Junction $tag"
}
.mkString("\n")
acc0 + acc1
}
def compact: String = frames.map(renderStackTraceElement).mkString(", ")
def toList: List[StackTraceElement] = frames
override def toString: String = compact
}
private object Trace {
def apply(events: RingBuffer): Trace =
new Trace(Tracing.getFrames(events))
}