Logback's DBAppender logs all properties in its context and MDC to the database. I would like to control which properties are logged, specifically filtering out certain values, but I can't find any options to do so. The documentation is terse:
The logging_event_property is used to store the keys and values contained in the MDC or the Context
Is it possible to exclude certain properties from being logged?
Here is an example:
Logback is configured with a DBAppender that loads its properties from vct.properties:
<configuration>
<property resource="vct.properties" />
<appender name="DB" class="ch.qos.logback.classic.db.DBAppender">
<connectionSource class="ch.qos.logback.core.db.DataSourceConnectionSource">
<dataSource class="com.mchange.v2.c3p0.ComboPooledDataSource">
<driverClass>com.mysql.jdbc.Driver</driverClass>
<jdbcUrl>jdbc:mysql://${log.db.host}:${log.db.port}/${log.db.schema}</jdbcUrl>
<user>${log.db.username}</user>
<password>${log.db.password}</password>
</dataSource>
</connectionSource>
</appender>
<root level="DEBUG">
<appender-ref ref="DB" />
</root>
</configuration>
vct.properties has the connection settings:
log.db.host=localhost
log.db.port=3306
log.db.schema=logs_development
log.db.username=loguser
log.db.password=logpass
When an event is logged, all of the connection settings are logged:
mysql> select * from logging_event_property where event_id=1;
+----------+---------------------+-------------------------------------------+
| event_id | mapped_key | mapped_value |
+----------+---------------------+-------------------------------------------+
| 1 | log.db.host | localhost |
| 1 | log.db.password | logpass |
| 1 | log.db.port | 3306 |
| 1 | log.db.schema | logs_development |
| 1 | log.db.username | loguser |
+----------+---------------------+-------------------------------------------+