Examples of org.apache.logging.log4j.message.Message

Package org.apache.logging.log4j.message

Examples of org.apache.logging.log4j.message.Message

org.apache.logging.log4j.message.Message
An interface for various Message implementations that can be logged. Messages can act as wrappers around Objects so that user can have control over converting Objects to Strings when necessary without requiring complicated formatters and as a way to manipulate the message based on information available at runtime such as the locale of the system.
Note: Message objects should not be considered to be thread safe nor should they be assumed to be safely reusable even on the same thread. The logging system may provide information to the Message objects and the Messages might be queued for asynchronous delivery. Thus, any modifications to a Message object by an application should by avoided after the Message has been passed as a parameter on a Logger method.
@doubt Interfaces should rarely extend Serializable according to Effective Java 2nd Ed pg 291.(RG) That section also says "If a class or interface exists primarily to participate in a framework that requires all participants to implement Serializable, then it makes perfect sense for the class or interface to implement or extend Serializable". Such is the case here as the LogEvent must be Serializable.

    public void log(final Marker marker, final String fqcn, final int i, final String s1, final Object[] objects,
                    Throwable throwable) {
        if (!logger.isEnabled(getLevel(i), (org.apache.logging.log4j.Marker) marker, s1)) {
            return;
        }
        Message msg;
        if (eventLogger && marker != null && marker.contains(EVENT_MARKER)) {
            try {
                final EventData data = (objects != null && objects[0] instanceof EventData) ? (EventData) objects[0] :
                    new EventData(s1);
                msg = new StructuredDataMessage(data.getEventId(), data.getMessage(), data.getEventType());

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    /**
     * {@inheritDoc}
     */
    @Override
    public void format(final LogEvent event, final StringBuilder toAppendTo) {
        final Message msg = event.getMessage();
        if (msg != null) {
            String result;
            if (msg instanceof MultiformatMessage) {
                result = ((MultiformatMessage) msg).getFormattedMessage(formats);
            } else {
                result = msg.getFormattedMessage();
            }
            if (result != null) {
                toAppendTo.append(config != null && result.contains("${") ?
                    config.getSubst().replace(event, result) : result);
            } else {

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        EventLogger.logEvent(msg);
        final List<LogEvent> list = app.getEvents();
        assertNotNull("No events generated", list);
        assertTrue("Incorrect number of events. Expected 1, got " + list.size(), list.size() == 1);
        final LogEvent event = list.get(0);
        final Message m = event.getMessage();
        assertTrue("Message is not a MapMessage", m instanceof MapMessage);
        final MapMessage message = (MapMessage) m;
        final Map<String, String> map = message.getData();
        assertNotNull("No Map", map);
        assertTrue("Incorrect number of map entries, expected 3 got " + map.size(), map.size() == 3);

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public class LevelPatternConverterTest {




    @Test
    public void testLevel() {
        final Message msg = new SimpleMessage("Hello");
        LogEvent event = new Log4jLogEvent("MyLogger", null, null, Level.DEBUG, msg, null);
        final StringBuilder sb = new StringBuilder();
        LevelPatternConverter converter = LevelPatternConverter.newInstance(null);
        converter.format(event, sb);
        assertEquals(Level.DEBUG.toString(), sb.toString());

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        }
    }


    @Override
    public void logMessage(final String fqcn, final Level level, final Marker marker, final Message message, final Throwable t) {
        final Message msg = message == null ? new SimpleMessage(Strings.EMPTY) : message;
        config.config.getConfigurationMonitor().checkConfiguration();
        config.loggerConfig.log(getName(), fqcn, marker, level, msg, t);
    }

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        return location;
    }


    @Override
    public long getTimeMillis() {
        Message msg = getMessage();
        if (msg instanceof TimestampMessage) { // LOG4J2-455
            return ((TimestampMessage) msg).getTimestamp();
        }
        return currentTimeMillis;
    }

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                    }
                }
            }
        }
        final String guid =  UuidUtil.getTimeBasedUuid().toString();
        final Message message = event.getMessage();
        if (message instanceof MapMessage) {
            // Add the guid to the Map so that it can be included in the Layout.
            ((MapMessage) message).put(GUID, guid);
            if (message instanceof StructuredDataMessage) {
                addStructuredData(eventPrefix, headers, (StructuredDataMessage) message);

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            final Throwable t) {
        logMessage(fqcn, level, marker, messageFactory.newMessage(message), t);
    }


    protected void logMessage(final String fqcn, final Level level, final Marker marker, final String message) {
        final Message msg = messageFactory.newMessage(message);
        logMessage(fqcn, level, marker, msg, msg.getThrowable());
    }

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        logMessage(fqcn, level, marker, msg, msg.getThrowable());
    }


    protected void logMessage(final String fqcn, final Level level, final Marker marker, final String message,
            final Object... params) {
        final Message msg = messageFactory.newMessage(message, params);
        logMessage(fqcn, level, marker, msg, msg.getThrowable());
    }

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     * @param params Arguments specified by the format.
     */
    @Override
    public void printf(Level level, Marker marker, String format, Object... params) {
        if (isEnabled(level, marker, format, params)) {
            Message msg = new StringFormattedMessage(format, params);
            logMessage(FQCN, level, marker, msg, msg.getThrowable());
        }
    }

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