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logger_json
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This package includes a set of :logger formatters designed to output logs in JSON format. It is compatible with a variety of log management systems that support JSON, including Google Cloud Logging and Error Reporting, Datadog, ElasticSearch, LogStash, FileBeat, and Kibana.
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lib/logger_json/formatter.ex
defmodule LoggerJSON.Formatter do
@moduledoc """
Behaviour that should be implemented by log formatters.
Example implementations can be found in `LoggerJSON.Formatters.GoogleCloudLogger` and
`LoggerJSON.Formatters.BasicLogger`.
"""
@doc """
Format event callback.
Returned map will be encoded to JSON.
"""
@callback format_event(
level :: Logger.level(),
msg :: Logger.message(),
ts :: Logger.Formatter.time(),
md :: [atom] | :all,
state :: map
) :: map | iodata() | %Jason.Fragment{}
end