Logging in JavaScript Adapters

Overview

This tutorial provides the required code snippets in order to add logging capabilities in a JavaScript adapter.

Logging example

The message below outputs to the trace.log file of the application server. If the server administrator is forwarding logs from the MobileFirst Server to the MobileFirst Analytics Server the logger message will also appear in the Infrastructure → Server Log Search view in the MobileFirst Analytics Console.

MFP.Logger.debug("This is a debug message from a JavaScript adapter");

Additional logging levels, from least to most verbose: ERROR, WARN, INFO, LOG and DEBUG.

Accessing the log files

• In an on-prem installation of the MobileFirst Server, the file is available depending on the underlying application server.
  • IBM WebSphere Application Server Full Profile
  • IBM WebSphere Application Server Liberty Profile
  • Apache Tomcat
• To get to the logs in a cloud deployment in:
  • IBM Containers or Liberty Build Pack, see the IBM Containers log and trace collection tutorial.
  • Mobile Foundation IBM Cloud service, see Accessing server logs section in the Using Mobile Foundation tutorial.

Forwarding Logs to the Analytics server

Logs can also be forwarded to the Analytics console.

1. In MobileFirst Operations Console select the Settings option from the sidebar navigation.
2. Click the Edit button in the Runtime Properties tab.
3. In the Analytics → Additional packages section, specify MFP.Logger to forward JavaScript Adapter logs to the MobileFirst Server.