As previously described, the existing JMS and file output handlers can be configured through the properties file. Each handler has its own specific properties that can be set: for example, the output file can be set for the file handler, and the JMS destination can be set for the JMS handler. Both of these handlers may also specify a custom formatter. The same formatter may be used for both handlers. As an alternative to writing Java code for custom formatting, a Velocity template may be specified For further information, see Filtering Events.