Qichao Chu created KAFKA-16125:
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Summary: Add parser for the metrics.verbosity config
Key: KAFKA-16125
URL: https://issues.apache.org/jira/browse/KAFKA-16125
Project: Kafka
Issue Type: Task
Reporter: Qichao Chu
Assignee: Qichao Chu
*{{metrics.verbosity}}* will be a new dynamic config introduced to control the
verbosity(fan-out rate) of the metrics. It's a config with JSON format
specifying the condition controlling fan-out of the metrics.
The parser will have the following validation responsibilities:
# Validate that the config conforms to JSON format.
# Validate that the level field is configured correctly with a set level
# Validate that the names field pattern is acceptable to
{{java.util.regex-compatible}}
# Validate that the filters field conforms to JSON map format
# Validate that all the filter patterns are acceptable to
{{java.util.regex-compatible}}
# Validate that no other field exists in the config
After parsing and validating the config, the parser should:
* Generate a config object which contains the level, names, and filter fields.
There should exist a default verbosity level too.
* Inside the object, the predicates should also be generated to allow fast
querying of the rules
* Overwrite/update the existing predicates if the config is updated
The config object should:
* Determine the verbosity level supplied with the topic name and the metrics
name
* If not defined, fall back to the default config level
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