Constructor

# new LogFilter()

Extends LoggedClass to supply a scoped logger and defines the contract required by LoggingFilter implementers that transform or drop log messages before emission.

Base class for message filters that plug into the logging pipeline.

sequenceDiagram participant Logger participant Filter as LogFilter participant Impl as ConcreteFilter participant Output Logger->>Filter: filter(config, message, context) Filter->>Impl: delegate to subclass implementation Impl-->>Filter: transformed message Filter-->>Output: return filtered message

View Source filters/LogFilter.ts, line 3

Example

class RedactSecretsFilter extends LogFilter {
  filter(config: LoggingConfig, message: string): string {
    return message.replace(/secret/gi, "***");
  }
}

const filter = new RedactSecretsFilter();
filter.filter({ ...DefaultLoggingConfig, verbose: 0 }, "secret token");

Members

# log

Returns a child logger dedicated to the filter, preventing recursive filter invocation when emitting diagnostic messages.

Scoped logger that excludes other filters from the chain.

View Source filters/LogFilter.ts, line 33

Methods

# abstract filter(config, message, context) → {string}

Inspect the provided message and context to produce the value that will be forwarded to subsequent filters or emitters.

Transform or suppress a log message.

Parameters:

Name	Type	Description
`config`	`LoggingConfig`	Active logging configuration.
`message`	`string`	Original log message payload.
`context`	`Array.<string>`	Context values attached to the message.

View Source filters/LogFilter.ts, line 58

Returns:

Filtered message to pass to downstream processing.

Type: string

# log() → {Logger}

Returns a child logger dedicated to the filter, preventing recursive filter invocation when emitting diagnostic messages.

Scoped logger that excludes other filters from the chain.

View Source filters/LogFilter.ts, line 47

Returns:

Context-aware logger for the filter instance.

Type: Logger