Modifying the on-the-wire message format

Macros, templates, and template functions allow you to fully customize the format of the message. This flexibility makes it possible to use AxoSyslog in some unexpected way if needed, for example, to emulate simple, plain-text protocols. The following example shows you how to send LPUSH commands to a Redis server.

The following template is a valid LPUSH command in accordance with the Redis protocol, and puts the $MESSAGE into a separate list for every $PROGRAM:

   template t_redis_lpush {
        template("*3\r\n$$5\r\nLPUSH\r\n$$$(length ${PROGRAM})\r\n${PROGRAM}\r\n$$$(length ${MESSAGE})\r\n${MESSAGE}\r\n");

If you use this template in a network() destination, AxoSyslog formats the message according to the template, and sends it to the Redis server.

   destination d_redis_tcp {
        network("" port(6379) template(t_redis_lpush));