Quarkus Logging Json

Quarkus logging extension outputting the logging in json.

Version to use

Quarkus Version	Use version
3.x.x	3.x.x
2.x.x	1.x.x, 2.x.x

Configuration

The extension is enabled by default for console, when added to the project. Console logging can be disabled using configuration: quarkus.log.json.console.enable=false

To see additional configuration options take a look at Config

Elastic Common Scheme

quarkus.log.json.log-format=ecs

Add additional fields to all log messages

If you want to add a static field to all the log message, that is possible using the configuration.

quarkus.log.json.additional-field.serviceName.value=service-a
# type is by default STRING - Other is INT, LONG, FLOAT, DOUBLE 
quarkus.log.json.additional-field.buildNumber.type=INT
quarkus.log.json.additional-field.buildNumber.value=42

Structured argument

If you want to do structured logging of arguments, then the argument send with your logging, can implement io.quarkiverse.loggingjson.providers.StructuredArgument. Then it is possible to use the JsonGenerator to format the argument in json.

Simple usage

import static io.quarkiverse.loggingjson.providers.KeyValueStructuredArgument.*;
...
log.info("Test log of structured arg", kv("key", "value"));

Custom log handler

If you want to add your own custom way to handle the LogRecords. You can create your own implementations of io.quarkiverse.loggingjson.JsonProvider, and provide it using CDI. Example implementation:

import jakarta.inject.Singleton;
import java.io.IOException;

import io.quarkiverse.loggingjson.JsonProvider;
import io.quarkiverse.loggingjson.JsonGenerator;
import org.jboss.logmanager.ExtLogRecord;

@Singleton
public class MyJsonProvider implements JsonProvider {

    @Override
    public void writeTo(JsonGenerator generator, ExtLogRecord event) throws IOException {
        generator.writeStringField("myCustomField", "and my custom value"); // Will be added to every log, as a field on the json.
    }
}

Contributors ✨

Thanks goes to these wonderful people (emoji key):

Simon Bengtsson 💻 🚧

This project follows the all-contributors specification. Contributions of any kind welcome!