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/* =========================================================================================
* 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.metric
import kamon.jsr166.LongAdder
import org.slf4j.LoggerFactory
trait Counter {
def unit: MeasurementUnit
def increment(): Unit
def increment(times: Long): Unit
}
class LongAdderCounter(name: String, tags: Map[String, String], val unit: MeasurementUnit) extends Counter {
import LongAdderCounter.logger
private val adder = new LongAdder()
def increment(): Unit =
adder.increment()
def increment(times: Long): Unit = {
if (times >= 0) adder.add(times)
else logger.warn(s"Ignored attempt to decrement counter [$name]")
}
def snapshot(resetState: Boolean = true): MetricValue =
if(resetState)
MetricValue(name, tags, unit, adder.sumAndReset())
else
MetricValue(name, tags, unit, adder.sum())
}
object LongAdderCounter {
private val logger = LoggerFactory.getLogger(classOf[LongAdderCounter])
}
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