move filters to util package, expose them from Kamon

1 files changed, 0 insertions, 125 deletions

diff --git a/kamon-core/src/main/scala/kamon/metric/Filter.scala b/kamon-core/src/main/scala/kamon/metric/Filter.scala
deleted file mode 100644
index ee9a15b9..00000000
--- a/kamon-core/src/main/scala/kamon/metric/Filter.scala
+++ /dev/null
@@ -1,125 +0,0 @@
-/* =========================================================================================
- * Copyright © 2013-2017 the kamon project <http://kamon.io/>
- *
- * 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 kamon
-package metric
-
-import java.util.regex.Pattern
-import com.typesafe.config.Config
-
-object Filter {
-  def fromConfig(config: Config): Filter = {
-    val filtersConfig = config.getConfig("kamon.metric.filters")
-    val acceptUnmatched = filtersConfig.getBoolean("accept-unmatched")
-
-    val perMetricFilter = filtersConfig.firstLevelKeys.filter(_ != "accept-unmatched") map { metricName: String ⇒
-      val includes = readFilters(filtersConfig, s"$metricName.includes")
-      val excludes = readFilters(filtersConfig, s"$metricName.excludes")
-
-      (metricName, new IncludeExcludeNameFilter(includes, excludes))
-    } toMap
-
-    new Filter(perMetricFilter, acceptUnmatched)
-  }
-
-  private def readFilters(filtersConfig: Config, name: String): Seq[NameFilter] = {
-    import scala.collection.JavaConverters._
-    if(filtersConfig.hasPath(name))
-      filtersConfig.getStringList(name).asScala.map(readNameFilter)
-    else
-      Seq.empty
-  }
-
-  private def readNameFilter(pattern: String): NameFilter = {
-    if(pattern.startsWith("regex:"))
-      new RegexNameFilter(pattern.drop(6))
-    else if(pattern.startsWith("glob:"))
-      new GlobPathFilter(pattern.drop(5))
-    else
-      new GlobPathFilter(pattern)
-  }
-}
-
-class Filter(perMetricFilter: Map[String, NameFilter], acceptUnmatched: Boolean) {
-  def accept(metricName: String, pattern: String): Boolean =
-    perMetricFilter
-      .get(metricName)
-      .map(_.accept(pattern))
-      .getOrElse(acceptUnmatched)
-}
-
-trait NameFilter {
-  def accept(name: String): Boolean
-}
-
-class IncludeExcludeNameFilter(includes: Seq[NameFilter], excludes: Seq[NameFilter]) extends NameFilter {
-  override def accept(name: String): Boolean =
-    includes.exists(_.accept(name)) && !excludes.exists(_.accept(name))
-}
-
-class RegexNameFilter(pattern: String) extends NameFilter {
-  private val pathRegex = pattern.r
-
-  override def accept(name: String): Boolean = name match {
-    case pathRegex(_*) ⇒ true
-    case _             ⇒ false
-  }
-}
-
-class GlobPathFilter(glob: String) extends NameFilter {
-  private val globPattern = Pattern.compile("(\\*\\*?)|(\\?)|(\\\\.)|(/+)|([^*?]+)")
-  private val compiledPattern = getGlobPattern(glob)
-
-  override def accept(name: String): Boolean =
-    compiledPattern.matcher(name).matches()
-
-  private def getGlobPattern(glob: String) = {
-    val patternBuilder = new StringBuilder
-    val matcher = globPattern.matcher(glob)
-    while (matcher.find()) {
-      val (grp1, grp2, grp3, grp4) = (matcher.group(1), matcher.group(2), matcher.group(3), matcher.group(4))
-      if (grp1 != null) {
-        // match a * or **
-        if (grp1.length == 2) {
-          // it's a *workers are able to process multiple metrics*
-          patternBuilder.append(".*")
-        }
-        else {
-          // it's a *
-          patternBuilder.append("[^/]*")
-        }
-      }
-      else if (grp2 != null) {
-        // match a '?' glob pattern; any non-slash character
-        patternBuilder.append("[^/]")
-      }
-      else if (grp3 != null) {
-        // backslash-escaped value
-        patternBuilder.append(Pattern.quote(grp3.substring(1)))
-      }
-      else if (grp4 != null) {
-        // match any number of / chars
-        patternBuilder.append("/+")
-      }
-      else {
-        // some other string
-        patternBuilder.append(Pattern.quote(matcher.group))
-      }
-    }
-
-    Pattern.compile(patternBuilder.toString)
-  }
-}
-