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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
import java.net.InetAddress
import java.util.concurrent.ThreadLocalRandom
import com.typesafe.config.Config
import kamon.util.HexCodec
case class Environment(host: String, service: String, instance: String, incarnation: String)
object Environment {
private val incarnation = HexCodec.toLowerHex(ThreadLocalRandom.current().nextLong())
def fromConfig(config: Config): Environment = {
val environmentConfig = config.getConfig("kamon.environment")
val service = environmentConfig.getString("service")
val host = readValueOrGenerate(
environmentConfig.getString("host"),
InetAddress.getLocalHost.getHostName
)
val instance = readValueOrGenerate(
environmentConfig.getString("instance"),
s"$service@$host"
)
Environment(host, service, instance, incarnation)
}
private def readValueOrGenerate(configuredValue: String, generator: => String): String =
if(configuredValue == "auto") generator else configuredValue
}
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