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Logging

This page relates to Server logging.

Logging level​

The logging level can be modified in the processes xml file.

Logging context​

Additional contextual attributes can be added to log statements. If enabled, the context is added on inbound requests/messages and propagated through the system.

Genesis makes use of slf4j's MDC to add this contextual information.

Context attributes​

The following Genesis-specific attributes are added to the logging context:

  • Message Type
  • Source Ref
  • Username (if present)
  • Payload

Example​

The below shows example values for the Genesis-specific attributes listed previously.

AttributeValue
genesis.message_typeEVENT_TRADE_INSERT
genesis.source_ref6045bdfffe1177d3-00005df4-00000004-1f1e5fe74723987e-c672dc68:1
genesis.usernameJohnDoe
genesis.payload{"MESSAGE_TYPE":"EVENT_TRADE_INSERT","USER_NAME":"JohnDoe","SESSION_AUTH_TOKEN":"********","REFRESH_AUTH_TOKEN":null,"VALIDATE":false,"IGNORE_WARNINGS":true,"DETAILS":{"INSTRUMENT_ID":"VOD","COUNTERPARTY_ID":"GENESIS","QUANTITY":10,"PRICE":1.5,"SIDE":"BUY"},"SOURCE_REF":"1"}

Set-up​

To enable Genesis attributes to be added to the logging context, set the LoggingContextEnabled system definition property to true. This property defaults to false.

item(name = "LoggingContextEnabled", value = "true")

You can then configure your logging configuration file as normal to show MDC attributes.

If Tracing is enabled, then additional tracing information is also available in MDC, see here for more details.

Example log4j2 configuration​

Show all MDC attributes:

<Pattern>%d{dd MMM yyyy HH:mm:ss.SSS} %-4relative [%t] %-5level %logger{35} [%X] - %m%n</Pattern>

Show just the Source Ref attribute:

<Pattern>%d{dd MMM yyyy HH:mm:ss.SSS} %-4relative [%t] %-5level %logger{35} [SourceRef = %X{genesis.source_ref}] - %m%n</Pattern>

Show all MDC attributes in json format:

<JsonLayout complete="false" compact="true" eventEol="true" properties="true"  />

Show just the Source Ref attribute in json format:

<JsonLayout complete="false" compact="true" eventEol="true" >
    <KeyValuePair key="SourceRef" value="${ctx:genesis.source_ref}"/>
</JsonLayout>