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package kamon.testkit
import java.nio.ByteBuffer
import kamon.context.{Codecs, Context, TextMap}
object SimpleStringCodec {
final class Headers extends Codecs.ForEntry[TextMap] {
private val dataKey = "X-String-Value"
override def encode(context: Context): TextMap = {
val textMap = TextMap.Default()
context.get(ContextTesting.StringBroadcastKey).foreach { value =>
textMap.put(dataKey, value)
}
textMap
}
override def decode(carrier: TextMap, context: Context): Context = {
carrier.get(dataKey) match {
case value @ Some(_) => context.withKey(ContextTesting.StringBroadcastKey, value)
case None => context
}
}
}
final class Binary extends Codecs.ForEntry[ByteBuffer] {
val emptyBuffer: ByteBuffer = ByteBuffer.allocate(0)
override def encode(context: Context): ByteBuffer = {
context.get(ContextTesting.StringBroadcastKey) match {
case Some(value) => ByteBuffer.wrap(value.getBytes)
case None => emptyBuffer
}
}
override def decode(carrier: ByteBuffer, context: Context): Context = {
context.withKey(ContextTesting.StringBroadcastKey, Some(new String(carrier.array())))
}
}
}
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