Add position formatter

benchmarks/src/main/scala/io/odin/Benchmarks.scala

@@ -9,7 +9,7 @@ import cats.effect.{ContextShift, IO, Timer}
 import io.odin.loggers.DefaultLogger
 import io.odin.syntax._
 import io.odin.formatter.Formatter
-import io.odin.formatter.options.ThrowableFormat
+import io.odin.formatter.options.{PositionFormat, ThrowableFormat}
 import io.odin.json.{Formatter => JsonFormatter}
 import io.odin.meta.Position
 import org.openjdk.jmh.annotations._
@@ -208,11 +208,19 @@ class FormatterBenchmarks extends OdinBenchmarks {
 
   private val formatterDepth = Formatter.create(
     ThrowableFormat(ThrowableFormat.Depth.Fixed(2), ThrowableFormat.Indent.NoIndent),
+    PositionFormat.Full,
     colorful = false
   )
 
   private val formatterDepthIndent = Formatter.create(
     ThrowableFormat(ThrowableFormat.Depth.Fixed(2), ThrowableFormat.Indent.Fixed(4)),
+    PositionFormat.Full,
+    colorful = false
+  )
+
+  private val abbreviated = Formatter.create(
+    ThrowableFormat.Default,
+    PositionFormat.AbbreviatePackage,
     colorful = false
   )
 
@@ -237,6 +245,9 @@ class FormatterBenchmarks extends OdinBenchmarks {
   @Benchmark
   def depthIndentFormatter(): Unit = formatterDepthIndent.format(loggerMessage)
 
+  @Benchmark
+  def abbreviatedPositionFormatter(): Unit = abbreviated.format(loggerMessage)
+
 }
 
 @State(Scope.Benchmark)

core/src/main/scala/io/odin/formatter/Formatter.scala

@@ -2,7 +2,8 @@ package io.odin.formatter
 
 import cats.syntax.show._
 import io.odin.LoggerMessage
-import io.odin.formatter.options.ThrowableFormat
+import io.odin.formatter.options.{PositionFormat, ThrowableFormat}
+import io.odin.meta.Position
 import perfolation._
 
 import scala.annotation.tailrec
@@ -16,31 +17,31 @@ object Formatter {
 
   val BRIGHT_BLACK = "\u001b[30;1m"
 
-  val default: Formatter = Formatter.create(ThrowableFormat.Default, colorful = false)
+  val default: Formatter = Formatter.create(ThrowableFormat.Default, PositionFormat.Full, colorful = false)
 
-  val colorful: Formatter = Formatter.create(ThrowableFormat.Default, colorful = true)
+  val colorful: Formatter = Formatter.create(ThrowableFormat.Default, PositionFormat.Full, colorful = true)
+
+  def create(throwableFormat: ThrowableFormat, colorful: Boolean): Formatter =
+    create(throwableFormat, PositionFormat.Full, colorful)
 
   /**
     * Creates new formatter with provided options
     *
     * @param throwableFormat @see [[formatThrowable]]
+    * @param positionFormat @see [[formatPosition]]
     * @param colorful use different color for thread name, level, position and throwable
     */
-  def create(throwableFormat: ThrowableFormat, colorful: Boolean): Formatter = {
+  def create(throwableFormat: ThrowableFormat, positionFormat: PositionFormat, colorful: Boolean): Formatter = {
 
     @inline def withColor(color: String, message: String): String =
       if (colorful) p"$color$message$RESET" else message
 
     (msg: LoggerMessage) => {
       val ctx = withColor(MAGENTA, formatCtx(msg.context))
-      val timestamp = p"${msg.timestamp.t.F}T${msg.timestamp.t.T},${msg.timestamp.t.milliOfSecond}"
+      val timestamp = formatTimestamp(msg.timestamp)
       val threadName = withColor(GREEN, msg.threadName)
       val level = withColor(BRIGHT_BLACK, msg.level.show)
-
-      val position = {
-        val lineNumber = if (msg.position.line >= 0) p":${msg.position.line}" else ""
-        withColor(BLUE, p"${msg.position.enclosureName}$lineNumber")
-      }
+      val position = withColor(BLUE, formatPosition(msg.position, positionFormat))
 
       val throwable = msg.exception match {
         case Some(t) =>
@@ -67,6 +68,35 @@ object Formatter {
       builder.toString()
     }
 
+  /**
+    * Formats timestamp using the following format: yyyy-MM-ddTHH:mm:ss,SSS
+    */
+  def formatTimestamp(timestamp: Long): String = {
+    val date = timestamp.t
+    p"${date.F}T${date.T},${date.milliOfSecond}"
+  }
+
+  /**
+    * The result differs depending on the format:
+    *
+    * `PositionFormat.Full` - prints full position
+    * 'io.odin.formatter.Formatter formatPosition:75' formatted as 'io.odin.formatter.Formatter formatPosition:75'
+    *
+    * `PositionFormat.AbbreviatePackage` - prints abbreviated package and full enclosing
+    * 'io.odin.formatter.Formatter formatPosition:75' formatted as 'i.o.f.Formatter formatPosition:75'
+    */
+  def formatPosition(position: Position, format: PositionFormat): String = {
+    val lineNumber = if (position.line >= 0) p":${position.line}" else ""
+
+    val enclosure = format match {
+      case PositionFormat.Full              => position.enclosureName
+      case PositionFormat.AbbreviatePackage => abbreviate(position.enclosureName)
+
+    }
+
+    p"$enclosure$lineNumber"
+  }
+
   /**
     * Default Throwable printer is twice as slow. This method was borrowed from scribe library.
     *
@@ -127,4 +157,24 @@ object Formatter {
         writeStackTrace(b, elements.tail, indent)
     }
   }
+
+  private def abbreviate(enclosure: String): String = {
+    @tailrec
+    def loop(input: Array[String], builder: StringBuilder): StringBuilder = {
+      input.length match {
+        case 0 => builder
+        case 1 => builder.append(input.head)
+        case _ =>
+          val head = input.head
+          val b = if (head.isEmpty) builder.append(questionMark) else builder.append(head.head)
+          loop(input.tail, b.append(dot))
+      }
+    }
+
+    loop(enclosure.split('.'), new StringBuilder).toString()
+  }
+
+  private val questionMark = "?"
+  private val dot = "."
+
 }

core/src/main/scala/io/odin/formatter/options/PositionFormat.scala

@@ -0,0 +1,8 @@
+package io.odin.formatter.options
+
+sealed trait PositionFormat
+
+object PositionFormat {
+  final case object Full extends PositionFormat
+  final case object AbbreviatePackage extends PositionFormat
+}

core/src/test/scala/io/odin/formatter/FormatterSpec.scala

@@ -1,9 +1,10 @@
 package io.odin.formatter
 
 import io.odin.OdinSpec
-import io.odin.formatter.options.ThrowableFormat
+import io.odin.formatter.options.{PositionFormat, ThrowableFormat}
 import io.odin.formatter.options.ThrowableFormat.{Depth, Indent}
 import io.odin.formatter.FormatterSpec.TestException
+import io.odin.meta.Position
 import org.scalacheck.Gen
 
 import scala.util.control.NoStackTrace
@@ -67,6 +68,31 @@ class FormatterSpec extends OdinSpec {
     trace.length shouldBe expectedLength
   }
 
+  behavior of "Formatter.formatPosition with PositionFormat"
+
+  it should "support PositionFormat" in forAll(positionFormatGen, Gen.posNum[Int]) { (format, line) =>
+    val position = Position("file.scala", "io.odin.formatter.Formatter enclosingMethod", "", line)
+
+    val expected = format match {
+      case PositionFormat.Full              => s"${position.enclosureName}:$line"
+      case PositionFormat.AbbreviatePackage => s"i.o.f.Formatter enclosingMethod:$line"
+    }
+
+    val result = Formatter.formatPosition(position, format)
+
+    result shouldBe expected
+  }
+
+  it should "not abbreviate empty package" in {
+    val position = Position("file.scala", "enclosingMethod", "", -1)
+
+    val full = Formatter.formatPosition(position, PositionFormat.Full)
+    val abbreviated = Formatter.formatPosition(position, PositionFormat.AbbreviatePackage)
+
+    full shouldBe "enclosingMethod"
+    abbreviated shouldBe "enclosingMethod"
+  }
+
   private lazy val indentGen: Gen[Indent] =
     Gen.oneOf(
       Gen.const(Indent.NoIndent),
@@ -79,6 +105,12 @@ class FormatterSpec extends OdinSpec {
       Gen.posNum[Int].map(size => Depth.Fixed(size))
     )
 
+  private lazy val positionFormatGen: Gen[PositionFormat] =
+    Gen.oneOf(
+      Gen.const(PositionFormat.Full),
+      Gen.const(PositionFormat.AbbreviatePackage)
+    )
+
 }
 
 object FormatterSpec {

docs/README.md

@@ -253,12 +253,14 @@ Beside copy-pasting the existing formatter to adjust it for one's needs, it's po
 
 ```scala
 object Formatter {
-  def create(throwableFormat: ThrowableFormat, colorful: Boolean): Formatter
+  def create(throwableFormat: ThrowableFormat, positionFormat: PositionFormat, colorful: Boolean): Formatter
 }
 ```
 
 - [`ThrowableFormat`](https://github.com/valskalla/odin/blob/master/core/src/main/scala/io/odin/formatter/options/ThrowableFormat.scala)
 allows to tweak the rendering of exceptions, specifically indentation and stack depth.
+- [`PositionFormat`](https://github.com/valskalla/odin/blob/master/core/src/main/scala/io/odin/formatter/options/PositionFormat.scala)
+allows to tweak the rendering of position.
 - `colorful` flag enables logs highlighting.
 
 ## Minimal level

json/src/main/scala/io/odin/json/Formatter.scala

@@ -6,28 +6,30 @@ import io.circe.Encoder
 import io.odin.LoggerMessage
 import io.odin.formatter.{Formatter => OFormatter}
 import io.odin.formatter.Formatter._
-import io.odin.formatter.options.ThrowableFormat
-import perfolation._
+import io.odin.formatter.options.{PositionFormat, ThrowableFormat}
 
 object Formatter {
 
-  val json: OFormatter = create(ThrowableFormat.Default)
+  val json: OFormatter = create(ThrowableFormat.Default, PositionFormat.Full)
 
-  def create(throwableFormat: ThrowableFormat): OFormatter = {
-    implicit val encoder: Encoder[LoggerMessage] = loggerMessageEncoder(throwableFormat)
+  def create(throwableFormat: ThrowableFormat): OFormatter =
+    create(throwableFormat, PositionFormat.Full)
+
+  def create(throwableFormat: ThrowableFormat, positionFormat: PositionFormat): OFormatter = {
+    implicit val encoder: Encoder[LoggerMessage] = loggerMessageEncoder(throwableFormat, positionFormat)
     (msg: LoggerMessage) => msg.asJson.noSpaces
   }
 
-  def loggerMessageEncoder(throwableFormat: ThrowableFormat): Encoder[LoggerMessage] =
+  def loggerMessageEncoder(throwableFormat: ThrowableFormat, positionFormat: PositionFormat): Encoder[LoggerMessage] =
     Encoder.forProduct7("level", "message", "context", "exception", "position", "thread_name", "timestamp")(m =>
       (
         m.level.show,
         m.message.value,
         m.context,
         m.exception.map(t => formatThrowable(t, throwableFormat)),
-        p"${m.position.enclosureName}:${m.position.line}",
+        formatPosition(m.position, positionFormat),
         m.threadName,
-        p"${m.timestamp.t.F}T${m.timestamp.t.T}"
+        formatTimestamp(m.timestamp)
       )
     )