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README.md

JSON LOGGING

If desired membrane can log in json format using JsonTemplateLayout from log4j2

RUNNING THE EXAMPLE

In this example we will configure membrane to log in JSON format

To run the example execute the following steps:

  1. Go to the examples/logging-json directory.

  2. Execute service-proxy.sh

  3. Notice the file membrane_json.log that is created in the logging-json directory.

  4. Open the URL http://localhost:2000/ in your browser.

  5. Open the file membrane_json.log and take a look at the logged data.

HOW IT IS DONE

The following part describes the example in detail.

Let's take a look at the service-proxy.sh file.

 java -Dlog4j.configurationFile=$(pwd)/log4j2_json.xml  -Dlog4j.debug=true -classpath "$CLASSPATH" com.predic8.membrane.core.Starter -c proxies.xml

In the above line we pass absolute path of our log4j configuration file with -Dlog4j.configurationFile VM option.

In the log4j2_json.xml file you can see <JsonTemplateLayout eventTemplateUri="classpath:com/predic8/membrane/core/interceptor/log/logTemplate.json"/> Membrane comes with a JSON template that attaches the proxy name to log output for easier tracing and log handling. JsonTemplateLayout class also comes with predefined JSON layouts like EcsLayout and GelfLayout. For more information check out link.

You can also use your own JSON layout using eventTemplateUri property. In order to observe this you can open logging-json/log4j2_json file and edit eventTemplateUri to file:(ABSOLUTE PATH OF ExampleLayout.json) for example file:/home/user/ExampleLayout.json

See:

  • log reference