logWithMarker
Log elements flowing through the stream as well as completion and erroring.
Signature
Source.logWithMarker
Source.logWithMarker
Flow.logWithMarker
Flow.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
-
source
import 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
-
source
.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
emits when upstream emits
backpressures when downstream backpressures
completes when upstream completes