Module log4rs_routing_appender::route::pattern
[−]
[src]
A router which constructs appenders from a template configuration.
Strings in the configuration template may contain substitution directives. The format is similar
to that of the log4rs pattern encoder, except that it is prefixed with a $ to avoid conflicts
with patterns in the templated configuration itself. Format specifications are not supported.
Only one formatter is currently supported:
mdc- An entry from the MDC. The first argument is required, and specifies the key to look up. If the key is not present, an error is raised. A second, optional argument allows a replacement string to be used if the key is not present.
Examples
Assume the MDC looks like {user_id: sfackler}.
kind: file
path: "logs/${mdc(user_id)}/${mdc(job_id)}.log"
will fail to parse, since there is no MDC entry for job_id. If we add a default value, like
kind: file
path: "logs/${mdc(user_id)}/${mdc(job_id)(no_job)}.log"
it will then parse to
kind: file
path: "logs/sfackler/no_job.log"
Structs
| PatternRouter |
A router which expands an appender configuration template. |
| PatternRouterConfig |
Configuration for the |
| PatternRouterDeserializer |
A deserializer for the |