Examples of org.apache.logging.log4j.Logger.warn()

org.apache.logging.log4j.Logger.warn()
Logs a message with the specific Marker at the {@link Level#WARN WARN} level. @param marker the marker data specific to this log statement @param msg the message string to be logged


            long start = System.nanoTime();


            for(int i = 0; i < 10000; i++) {
                if (i % 25 == 0) {
                    logger.warn("This is an exception message.", exception);
                } else {
                    logger.info("This is an info message.");
                }
            }

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        final long millis = System.currentTimeMillis();


        final Logger logger = LogManager.getLogger(this.getClass().getName() + ".testDriverManagerConfig");
        logger.info("Test my message 01.");
        logger.warn("This is another message 02.", exception);


        final Statement statement = this.connection.createStatement();
        final ResultSet resultSet = statement.executeQuery("SELECT * FROM dmLogEntry ORDER BY id");


        assertTrue("There should be at least one row.", resultSet.next());

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        long start = System.nanoTime();


        for(int i = 0; i < 10000; i++) {
            if (i % 25 == 0) {
                logger.warn("This is an exception message.", exception);
            } else {
                logger.info("This is an info message.");
            }
        }

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    @Test
    public void rewriteTest() throws Exception {
        final Logger logger = LogManager.getLogger(AsyncAppender.class);
        logger.error("This is a test");
        logger.warn("Hello world!");
        Thread.sleep(100);
        final List<String> list = app.getMessages();
        assertNotNull("No events generated", list);
        assertTrue("Incorrect number of events. Expected 2, got " + list.size(), list.size() == 2);
        String msg = list.get(0);

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        String exceed = "Long message that exceeds rollover size... ";
        final char[] padding = new char[250];
        Arrays.fill(padding, 'X');
        exceed += new String(padding);
        log.warn(exceed);
        assertFalse("exceeded size but afterRollover-1.log not created yet", after1.exists());


        final String trigger = "This message triggers rollover.";
        log.warn(trigger);

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        exceed += new String(padding);
        log.warn(exceed);
        assertFalse("exceeded size but afterRollover-1.log not created yet", after1.exists());


        final String trigger = "This message triggers rollover.";
        log.warn(trigger);


        ((LifeCycle) LogManager.getContext()).stop(); // stop async thread


        assertTrue("afterRollover-1.log created", after1.exists());

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    @Test
    public void testNoLocation() throws Exception {
        final Logger logger = LogManager.getLogger(AsyncAppender.class);
        logger.error("This is a test");
        logger.warn("Hello world!");
        Thread.sleep(100);
        final List<String> list = app.getMessages();
        assertNotNull("No events generated", list);
        assertTrue("Incorrect number of events. Expected 2, got " + list.size(), list.size() == 2);
        String msg = list.get(0);

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    @Test
    public void validateXmlSchemaSimple() throws Exception {
        final File file = new File("target", "XmlCompactFileAsyncAppenderValidationTest.log.xml");
        file.delete();
        final Logger log = LogManager.getLogger("com.foo.Bar");
        log.warn("Message 1");
        log.info("Message 2");
        log.debug("Message 3");
        ((LifeCycle) LogManager.getContext()).stop(); // stop async thread
        this.validateXmlSchema(file);
    }

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        String exceed = "Long message that exceeds rollover size... ";
        final char[] padding = new char[250];
        Arrays.fill(padding, 'X');
        exceed += new String(padding);
        log.warn(exceed);
        assertFalse("exceeded size but afterRollover-1.log not created yet", after1.exists());


        final String trigger = "This message triggers rollover.";
        log.warn(trigger);

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        exceed += new String(padding);
        log.warn(exceed);
        assertFalse("exceeded size but afterRollover-1.log not created yet", after1.exists());


        final String trigger = "This message triggers rollover.";
        log.warn(trigger);


        ((LifeCycle) LogManager.getContext()).stop(); // stop async thread
        
        final int MAX_ATTEMPTS = 50;
        int count = 0;

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