func()

in apps/tomcat.go [68:126]

• 50 lines of code
• 1 McCabe index (conditional complexity)

func (p LoggingProcessorTomcatSystem) Components(ctx context.Context, tag string, uid string) []fluentbit.Component {
	c := confgenerator.LoggingProcessorParseMultilineRegex{
		LoggingProcessorParseRegexComplex: confgenerator.LoggingProcessorParseRegexComplex{
			Parsers: []confgenerator.RegexParser{
				{
					// Sample line: 11-Jan-2022 20:41:58.279 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/opt/tomcat/temp
					// Sample line: 11-Jan-2022 20:41:58.283 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent The Apache Tomcat Native library which allows using OpenSSL was not found on the java.library.path: [/usr/java/packages/lib:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib]
					// Sample line: 13-Jan-2022 16:10:27.715 SEVERE [main] org.apache.catalina.core.ContainerBase.removeChild Error destroying child
					// Sample line: org.apache.catalina.LifecycleException: An invalid Lifecycle transition was attempted ([before_destroy]) for component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/examples]] in state [STARTED]
					// Sample line:         at org.apache.catalina.util.LifecycleBase.invalidTransition(LifecycleBase.java:430)
					// Sample line:         at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:316)
					Regex: `^(?<time>\d{2}-[A-Z]{1}[a-z]{2}-\d{4}\s\d{2}:\d{2}:\d{2}.\d{3})\s(?<level>[A-Z]+)\s\[(?<module>[^\]]+)\]\s(?<message>(?<source>[\w\.]+)[\S\s]+)`,
					Parser: confgenerator.ParserShared{
						TimeKey: "time",
						//   13-Jan-2022 16:10:27.715
						TimeFormat: "%d-%b-%Y %H:%M:%S.%L",
						Types: map[string]string{
							"lineNumber": "integer",
						},
					},
				},
			},
		},
		Rules: []confgenerator.MultilineRule{
			{
				StateName: "start_state",
				NextState: "cont",
				Regex:     `^\d{2}-[A-Z]{1}[a-z]{2}-\d{4}\s\d{2}:\d{2}:\d{2}.\d{3}`,
			},
			{
				StateName: "cont",
				NextState: "cont",
				Regex:     `^(?!\d{2}-[A-Z]{1}[a-z]{2}-\d{4}\s\d{2}:\d{2}:\d{2}.\d{3})`,
			},
		},
	}.Components(ctx, tag, uid)

	// https://tomcat.apache.org/tomcat-10.0-doc/logging.html
	c = append(c,
		confgenerator.LoggingProcessorModifyFields{
			Fields: map[string]*confgenerator.ModifyField{
				"severity": {
					CopyFrom: "jsonPayload.level",
					MapValues: map[string]string{
						"FINEST":  "DEBUG",
						"FINER":   "DEBUG",
						"FINE":    "DEBUG",
						"INFO":    "INFO",
						"WARNING": "WARNING",
						"SEVERE":  "CRITICAL",
					},
					MapValuesExclusive: true,
				},
				InstrumentationSourceLabel: instrumentationSourceValue(p.Type()),
			},
		}.Components(ctx, tag, uid)...,
	)
	return c
}