JsonLogger class final

The JsonLogger class is a logger that records log messages in JSON format.

It implements the ILogRecorder interface and provides the following features:

  • supports configurable log levels.
  • can be used to record log messages to any output stream, such as the console, a file, or a network socket.
  • uses a customizable mapper to convert LogRecordEntity objects to JSON maps.
  • uses a customizable serializer to serialize JSON maps to strings.


JsonLogger({required int logLevel, RecordMapper? mapper, JsonSerializer? serializer, void output(String) = print})
The JsonLogger class is a logger that records log messages in JSON format.


hashCode int
The hash code for this object.
no setterinherited
logLevel int
The logLevel getter returns the log level of the log recorder instance. This log level represents the minimum level of logs that will be recorded by this recorder.
mapper RecordMapper
The mapper that converts LogRecordEntity objects to JSON maps.
output → void Function(String)
The output stream to which log messages will be recorded.
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
serializer JsonSerializer
The serializer that serializes JSON maps to strings.


canRecord(LogRecordEntity record) bool
validate whether the current log record should be recorded by the log recorder instance. By default, it checks if the log level of the log recorder is equal to or less than the log level of the given record parameter.
close() → void
called when this particular log recorder is removed from the manager. It serves as a cleanup or finalization method for any resources or operations associated with the log recorder.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
onRecord(LogRecordEntity record) → void
a callback that will be invoked when the manager receives a new log record that can be recorded by this specific recorder. It takes a LogRecordEntity object as a parameter, representing the log record that was received.
toString() String
A string representation of this object.


operator ==(Object other) bool
The equality operator.