Consume consumes a stream to the end, and calls the handler with the parsed stream messages.

EOP error.

EOP success.

critical error.

debug message.

message for operator / internal message.

ops error.

message for endusers / public message.

result message, hrd.

job, json (full result of a job).

result message, json.

result message, toml.

result message, yaml.

statsd message(s) AVG.

stderr.

stdout.

log msg structured.

log msg (unstructured = level5, cat=unknown).

warning message.

Message Flags.

Message is a message from running process.

MessageHandler represents a callback type.