Tiny logging wrapper dedicated for CLI-oriented applications

Last update: Sep 25, 2022

Related tags

Overview

Dynamic Logger

Tiny logging wrapper dedicated for CLI oriented applications with non-static logger that require dynamic threshold/level changes, programmable output formatting, custom levels, print stream redirecting and easily testable output.

Available implementations:

System logger
In memory logger
SL4J implementation
Aggregated logger

Artifact

<dependency>
    
    <artifactId>dynamic-loggerartifactId>
    
    <artifactId>dynamic-logger-sl4jartifactId>
    <groupId>net.dzikoyskgroupId>
    <version>1.0.1version>
dependency>

Repository:

<repository>
    <id>panda-repositoryid>
    <url>https://repo.panda-lang.org/releasesurl>
repository>

Usage

Print stream redirecting

PrintStream printStream = logger.toPrintStream();
throwable.printStackTrace(printStream); // pass logger as printstream
printStream.close();

Dynamic threshold change

Logger logger = // logger with INFO level
logger.debug("message"); // filtered
logger.setThreshold(Channel.DEBUG);
logger.debug("message"); // displayed

Custom logging levels

Channel bugs = new Channel("bugs", 100.0, ChannelIntention.NEGATIVE)
logger.log(bugs, "Should not happen");

Testable output

.filter(entry -> Channel.ERROR.equals(entry.getKey())) .filter(entry -> entry.getValue().contains("Exception")) .findAny()) ">

InMemoryLogger logger = new InMemoryLogger();

/*
 * Some code/app/libs using logger
 */

assertTrue(inMemory.contains("Exception"))

// or using custom filters

assertTrue(inMemory.getMessages().stream() // Stream of Entry
    .filter(entry -> Channel.ERROR.equals(entry.getKey()))
    .filter(entry -> entry.getValue().contains("Exception"))
    .findAny())

Aggregation

Logger logger = new AggregatedLogger(
        customLogger,
        new SystemLogger(),
        new Slf4jLogger(LoggerFactory.getLogger("Default logger"), Channel.ALL)
);

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Comments

Cannot print messages with '%' char

java.util.UnknownFormatConversionException: Conversion = '%'
	at java.util.Formatter.checkText(Formatter.java:2579)
	at java.util.Formatter.parse(Formatter.java:2565)
	at java.util.Formatter.format(Formatter.java:2501)
	at java.util.Formatter.format(Formatter.java:2455)
	at java.lang.String.format(String.java:2940)
	at net.dzikoysk.dynamiclogger.backend.DefaultLogger.log(DefaultLogger.java:51)
	at net.dzikoysk.dynamiclogger.Logger.info(Logger.java:67)
	at org.panda_lang.pandomium.loader.PandomiumLoader.lambda$load$0(PandomiumLoader.java:34)
	at org.panda_lang.pandomium.loader.PandomiumLoader.callListeners(PandomiumLoader.java:56)
	at org.panda_lang.pandomium.loader.PandomiumLoader.updateProgress(PandomiumLoader.java:51)
	at org.panda_lang.pandomium.loader.PandomiumLoaderWorker.load(PandomiumLoaderWorker.java:28)
	at org.panda_lang.pandomium.loader.PandomiumLoaderWorker.run(PandomiumLoaderWorker.java:21)
	at org.panda_lang.pandomium.loader.PandomiumLoader.load(PandomiumLoader.java:41)
	at org.panda_lang.pandomium.Pandomium.initialize(Pandomium.java:38)
	at org.panda_lang.pandomium.PandomiumTest.main(PandomiumTest.java:20)

bug

opened by dzikoysk 0