This document provides instructions for adding a logger to an existing flow in Mule ESB. The steps are: 1. Drag and drop a Logger component into the message flow after the SetPayload block. 2. Double click the Logger and configure the log message, in this case prefixing the payload message. 3. Start the Mule server and invoke the service endpoint to see the log message output to the console, highlighting the custom log message and payload.

1. Mule ESB
Add a logger to existing flow

2. Before continuing…
Make sure you’ve already completed slides:
Mule esb first http connector
Or watched video:
Mule ESB First HTTP Connector

3. OpenAnypointStudio
Let’sopenour«myfirstproject»
OpenMessageFlow

4. FromMulePaletteview,searchfor
«logger»and selectthefirstone.
DragandDrop LoggerintoMessage
Flowview,afterSetPayload
DoubleclickonLogger
onbelowLoggerviewlet’sconfigureour
logmessage.Inthisexamplewekeepa
prefixandthenthepayloadmessage
(configuredinSetPayloadblock):
#['IAmloggingthemessage:'+payload]
ClickonSAVEattop-leftofscreen

5. NowwecanstartourMuleserver
RightClickonmyfirstprojectRunAs
MuleApplication
OntheConsoleviewbelowserverisgoing
tostart
Attheendyouwillseethestatus
DEPLOYED
*******************************
*******************************
*myfirstproject *default
*DEPLOYED *
*******************************
*******************************
Thismeansthatserverisupandrunning

6. FromWebBrowser(IE,Chrome,orwhat
youwant)let’sinvokeour service
endpoint:
http://localhost:8081/myfirstFlow
Ifeverithingisokyouwillseethepayload
------------------------------------------------
Thistime,onConsole,thereisalsothelog
messagecomposedbefore.
TheparthighlightedinREDisourcustom
message
TheparthighlightedinBLUEisourpayload
Enjoy with Mule!