logWithMarker

Log elements flowing through the stream as well as completion and erroring.

Simple operators

Signature

Source.logWithMarkerSource.logWithMarker Flow.logWithMarkerFlow.logWithMarker

Description

Log elements flowing through the stream as well as completion and erroring. By default element and completion signals are logged on debug level, and errors are logged on Error level. This can be changed by calling Attributes.logLevels(...) Attributes.createLogLevels(...) on the given Flow.

See also log.

Example

Scala

copysourceimport akka.event.LogMarker
import akka.stream.Attributes

.logWithMarker(name = "myStream", e => LogMarker(name = "myMarker", properties = Map("element" -> e)))
.addAttributes(
  Attributes.logLevels(
    onElement = Attributes.LogLevels.Off,
    onFinish = Attributes.LogLevels.Info,
    onFailure = Attributes.LogLevels.Error))

Java

copysource.logWithMarker(
    "myStream", (e) -> LogMarker.create("myMarker", Collections.singletonMap("element", e)))
.addAttributes(
    Attributes.createLogLevels(
        Attributes.logLevelOff(), // onElement
        Attributes.logLevelInfo(), // onFinish
        Attributes.logLevelError())) // onFailure

Reactive Streams semantics