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

Java

copysourceimport org.apache.pekko
import pekko.event.LogMarker
import pekko.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))

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¶