blob: c757027c11c8cd662488f5d211cbaacf30ccb91f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/*
* =========================================================================================
* Copyright © 2013-2016 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.trace.logging
import kamon.trace.TraceLocal.AvailableToMdc
import kamon.trace.{ EmptyTraceContext, MetricsOnlyContext, TraceContext, Tracer }
import kamon.util.Supplier
import org.slf4j.MDC
trait MdcKeysSupport {
val traceTokenKey = "traceToken"
val traceNameKey = "traceName"
private val defaultKeys = Seq(traceTokenKey, traceNameKey)
def withMdc[A](thunk: ⇒ A): A = {
val keys = copyToMdc(Tracer.currentContext)
try thunk finally keys.foreach(key ⇒ MDC.remove(key))
}
// Java variant.
def withMdc[A](thunk: Supplier[A]): A = withMdc(thunk.get)
private[kamon] def copyToMdc(traceContext: TraceContext): Iterable[String] = traceContext match {
case ctx: MetricsOnlyContext ⇒
// Add the default key value pairs for the trace token and trace name.
MDC.put(traceTokenKey, ctx.token)
MDC.put(traceNameKey, ctx.name)
defaultKeys ++ ctx.traceLocalStorage.underlyingStorage.collect {
case (available: AvailableToMdc, value) ⇒ Map(available.mdcKey -> String.valueOf(value))
}.flatMap { value ⇒ value.map { case (k, v) ⇒ MDC.put(k, v); k } }
case EmptyTraceContext ⇒ Iterable.empty[String]
}
}
object MdcKeysSupport extends MdcKeysSupport
|
