/*
 * =========================================================================================
 * Copyright © 2013-2015 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.util.http

import kamon.metric.{EntityRecorderFactory, GenericEntityRecorder}
import kamon.metric.instrument.InstrumentFactory

/**
 *  Counts HTTP response status codes into per status code and per trace name + status counters. If recording a HTTP
 *  response with status 500 for the trace "GetUser", the counter with name "500" as well as the counter with name
 *  "GetUser_500" will be incremented.
 */
class HttpServerMetrics(instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) {

  def recordResponse(statusCode: String): Unit =
    counter(statusCode).increment()

  def recordResponse(traceName: String, statusCode: String): Unit = {
    recordResponse(statusCode)
    counter(traceName + "_" + statusCode).increment()
  }
}

object HttpServerMetrics extends EntityRecorderFactory[HttpServerMetrics] {
  def category: String = "http-server"
  def createRecorder(instrumentFactory: InstrumentFactory): HttpServerMetrics = new HttpServerMetrics(instrumentFactory)
}