io.gearpump.metrics.Counter.scala Maven / Gradle / Ivy

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/*
 * 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 io.gearpump.metrics

import com.codahale.metrics.{Counter => CodaHaleCounter}

/**
 * @see com.codahale.metrics.Counter
 */
class Counter(val name: String, counter: CodaHaleCounter, sampleRate: Int = 1) {
  private var sampleCount = 0L
  private var toBeIncremented = 0L

  def inc() {
    inc(1)
  }

  def inc(n: Long) {
    toBeIncremented += n
    sampleCount += 1
    if (null != counter && sampleCount % sampleRate == 0) {
      counter.inc(toBeIncremented)
      toBeIncremented = 0
    }
  }
}