Examples with MemoryAppender org.graylog2.log4j.MemoryAppender used on opensource projects

Example 1 with MemoryAppender

use of org.graylog2.log4j.MemoryAppender in project graylog2-server by Graylog2.

the class LoggersResource method messages.

@GET
@Timed
@ApiOperation(value = "Get recent internal log messages")
@ApiResponses(value = { @ApiResponse(code = 404, message = "Memory appender is disabled."), @ApiResponse(code = 500, message = "Memory appender is broken.") })
@Path("/messages/recent")
@Produces(MediaType.APPLICATION_JSON)
public LogMessagesSummary messages(@ApiParam(name = "limit", value = "How many log messages should be returned", defaultValue = "500", allowableValues = "range[0, infinity]") @QueryParam("limit") @DefaultValue("500") @Min(0L) int limit, @ApiParam(name = "level", value = "Which log level (or higher) should the messages have", defaultValue = "ALL", allowableValues = "[OFF, FATAL, ERROR, WARN, INFO, DEBUG, TRACE, ALL]") @QueryParam("level") @DefaultValue("ALL") @NotEmpty String level) {
    final Appender appender = getAppender(MEMORY_APPENDER_NAME);
    if (appender == null) {
        throw new NotFoundException("Memory appender is disabled. Please refer to the example log4j.xml file.");
    }
    if (!(appender instanceof MemoryAppender)) {
        throw new InternalServerErrorException("Memory appender is not an instance of MemoryAppender. Please refer to the example log4j.xml file.");
    }
    final Level logLevel = Level.toLevel(level, Level.ALL);
    final MemoryAppender memoryAppender = (MemoryAppender) appender;
    final List<InternalLogMessage> messages = new ArrayList<>(limit);
    for (LogEvent event : memoryAppender.getLogMessages(limit)) {
        final Level eventLevel = event.getLevel();
        if (!eventLevel.isMoreSpecificThan(logLevel)) {
            continue;
        }
        final ThrowableProxy thrownProxy = event.getThrownProxy();
        final String throwable;
        if (thrownProxy == null) {
            throwable = null;
        } else {
            throwable = thrownProxy.getExtendedStackTraceAsString();
        }
        final Marker marker = event.getMarker();
        messages.add(InternalLogMessage.create(event.getMessage().getFormattedMessage(), event.getLoggerName(), eventLevel.toString(), marker == null ? null : marker.toString(), new DateTime(event.getTimeMillis(), DateTimeZone.UTC), throwable, event.getThreadName(), event.getContextData().toMap()));
    }
    return LogMessagesSummary.create(messages);
}

Example 2 with MemoryAppender

use of org.graylog2.log4j.MemoryAppender in project graylog2-server by Graylog2.

the class MemoryAppenderTest method appenderIsThreadSafe.

@Test
public void appenderIsThreadSafe() throws Exception {
    final int bufferSize = 1;
    final MemoryAppender appender = MemoryAppender.createAppender(null, null, "memory", String.valueOf(bufferSize), "false");
    assertThat(appender).isNotNull();
    final LogEvent logEvent = Log4jLogEvent.newBuilder().setLevel(Level.INFO).setLoggerName("test").setLoggerFqcn("com.example.test").setMessage(new SimpleMessage("Message")).build();
    final int threadCount = 48;
    final Thread[] threads = new Thread[threadCount];
    final TestAwareThreadGroup threadGroup = new TestAwareThreadGroup("memory-appender-test");
    final CountDownLatch latch = new CountDownLatch(1);
    for (int i = 0; i < threadCount; i++) {
        final Runnable runner = () -> {
            try {
                latch.await();
                long start = System.currentTimeMillis();
                while (System.currentTimeMillis() - start < TimeUnit.SECONDS.toMillis(4L)) {
                    appender.append(logEvent);
                }
            } catch (InterruptedException ie) {
            // Do nothing
            }
        };
        final Thread thread = new Thread(threadGroup, runner, "TestThread-" + i);
        threads[i] = thread;
        thread.start();
    }
    latch.countDown();
    for (int i = 0; i < threadCount; i++) {
        threads[i].join(TimeUnit.SECONDS.toMillis(5L));
    }
    assertThat(threadGroup.getExceptionsInThreads().get()).isEqualTo(0);
}

Example 3 with MemoryAppender

use of org.graylog2.log4j.MemoryAppender in project graylog2-server by Graylog2.

the class MemoryAppenderTest method appenderCanConsumeMoreMessagesThanBufferSize.

@Test
public void appenderCanConsumeMoreMessagesThanBufferSize() {
    final int bufferSize = 10;
    final MemoryAppender appender = MemoryAppender.createAppender(null, null, "memory", String.valueOf(bufferSize), "false");
    assertThat(appender).isNotNull();
    for (int i = 1; i <= bufferSize + 1; i++) {
        final LogEvent logEvent = Log4jLogEvent.newBuilder().setLevel(Level.INFO).setLoggerName("test").setLoggerFqcn("com.example.test").setMessage(new SimpleMessage("Message " + i)).build();
        appender.append(logEvent);
    }
    final List<LogEvent> messages = appender.getLogMessages(bufferSize);
    for (int i = 0; i < messages.size(); i++) {
        assertThat(messages.get(i).getMessage().getFormattedMessage()).isEqualTo("Message " + (bufferSize - i + 1));
    }
}

Example 4 with MemoryAppender

use of org.graylog2.log4j.MemoryAppender in project graylog2-server by Graylog2.

the class MemoryAppenderTest method testGetLogMessages.

@Test
public void testGetLogMessages() {
    final int bufferSize = 10;
    final MemoryAppender appender = MemoryAppender.createAppender(null, null, "memory", String.valueOf(bufferSize), "false");
    assertThat(appender).isNotNull();
    for (int i = 1; i <= bufferSize; i++) {
        final LogEvent logEvent = Log4jLogEvent.newBuilder().setLevel(Level.INFO).setLoggerName("test").setLoggerFqcn("com.example.test").setMessage(new SimpleMessage("Message " + i)).build();
        appender.append(logEvent);
    }
    assertThat(appender.getLogMessages(bufferSize * 2)).hasSize(bufferSize);
    assertThat(appender.getLogMessages(bufferSize)).hasSize(bufferSize);
    assertThat(appender.getLogMessages(bufferSize / 2)).hasSize(bufferSize / 2);
    assertThat(appender.getLogMessages(0)).isEmpty();
    final List<LogEvent> messages = appender.getLogMessages(5);
    for (int i = 0; i < messages.size(); i++) {
        assertThat(messages.get(i).getMessage().getFormattedMessage()).isEqualTo("Message " + (bufferSize - i));
    }
}