private List<AppenderComponentBuilder> createAppenders(ConfigurationBuilder<BuiltConfiguration> builder) {
    List<AppenderComponentBuilder> appenders = new ArrayList<>();
    String logFile = getActualLogFile(ElasticApmAgent.getAgentHome(), getValue(LOG_FILE_KEY, sources, getValue(DEPRECATED_LOG_FILE_KEY, sources, DEFAULT_LOG_FILE)));
    if (logFile.equals(SYSTEM_OUT)) {
        appenders.add(createConsoleAppender(builder));
        if (Boolean.parseBoolean(getValue(SHIP_AGENT_LOGS, sources, Boolean.TRUE.toString()))) {
            File tempLog = getTempLogFile(ephemeralId);
            tempLog.deleteOnExit();
            File rotatedTempLog = new File(tempLog + ".1");
            rotatedTempLog.deleteOnExit();
            appenders.add(createFileAppender(builder, tempLog.getAbsolutePath(), createLayout(builder, LogFormat.JSON)));
        }
    } else {
        appenders.add(createFileAppender(builder, logFile, createLayout(builder, getFileLogFormat())));
    }
    for (AppenderComponentBuilder appender : appenders) {
        builder.add(appender);
    }
    return appenders;
}
 

private AppenderComponentBuilder createFileAppender(ConfigurationBuilder<BuiltConfiguration> builder, String logFile, LayoutComponentBuilder layout) {
    ByteValue size = ByteValue.of(getValue("log_file_size", sources, LoggingConfiguration.DEFAULT_MAX_SIZE));
    return builder.newAppender("rolling", "RollingFile")
        .addAttribute("fileName", logFile)
        .addAttribute("filePattern", logFile + ".%i")
        .add(layout)
        .addComponent(builder.newComponent("Policies")
            .addComponent(builder.newComponent("SizeBasedTriggeringPolicy").addAttribute("size", size.getBytes() + "B")))
        // Always keep exactly one history file.
        // This is needed to ensure that the rest of the file can be sent when its rotated.
        // Storing multiple history files would give the false impression that, for example,
        // when currently reading from apm.log2, the reading would continue from apm.log1.
        // This is not the case, when apm.log2 is fully read, the reading will continue from apm.log.
        // That is because we don't want to require the reader having to know the file name pattern of the rotated file.
        .addComponent(builder.newComponent("DefaultRolloverStrategy").addAttribute("max", 1));
}
 

@Test
public void testBuildConfiguration() {
    try {
        System.setProperty(Constants.LOG4J_CONTEXT_SELECTOR,
                "org.apache.logging.log4j.core.async.AsyncLoggerContextSelector");
        final ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory
                .newConfigurationBuilder();
        CustomConfigurationFactory.addTestFixtures("config name", builder);
        final Configuration configuration = builder.build();
        try (LoggerContext ctx = Configurator.initialize(configuration)) {
            validate(configuration);
        }
    } finally {
        System.getProperties().remove(Constants.LOG4J_CONTEXT_SELECTOR);
    }
}
 

/**
 * Returns the pattern layout defined by {@link LoggingSettings}.
 *
 * @param builder The builder.
 * @return The pattern layout.
 */
private LayoutComponentBuilder getPatternLayout(ConfigurationBuilder<BuiltConfiguration> builder) {
    var pattern = "";
    var formatType = Luna.loggingSettings().formatType();
    switch (formatType) {
        case BASIC:
            pattern = "[%d{dd MMM yyyy, h:mm:ss a}] [%level] %msg%n";
            break;
        case VERBOSE:
            pattern = "%d{[dd MMM yyyy HH:mm:ss]} [%logger{36}] [%t]%n%level: %msg%n";
            break;
    }
    if (pattern.isEmpty()) {
        throw new IllegalStateException("No pattern layout for " + formatType + "!");
    }
    return builder.newLayout("PatternLayout").addAttribute("pattern", pattern);
}
 

@Test
public void givenDefaultLog4j2Environment_whenProgrammaticallyConfigured_thenLogsCorrectly() {
    ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder();
    AppenderComponentBuilder console = builder.newAppender("Stdout", "CONSOLE")
            .addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
    console.add(builder.newLayout("PatternLayout")
            .addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
    builder.add(console);
    builder.add(builder.newLogger("com", Level.DEBUG)
            .add(builder.newAppenderRef("Stdout"))
            .addAttribute("additivity", false));
    builder.add(builder.newRootLogger(Level.ERROR)
            .add(builder.newAppenderRef("Stdout")));
    Configurator.initialize(builder.build());
    LogPrinter logPrinter = new LogPrinter();
    logPrinter.printlog();
}
 

@Test
public void testBuildConfiguration() throws Exception {
    try {
        System.setProperty(Constants.LOG4J_CONTEXT_SELECTOR,
                "org.apache.logging.log4j.core.async.AsyncLoggerContextSelector");
        final ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory
                .newConfigurationBuilder();
        CustomConfigurationFactory.addTestFixtures("config name", builder);
        final Configuration configuration = builder.build();
        try (LoggerContext ctx = Configurator.initialize(configuration)) {
            validate(configuration);
        }
    } finally {
        System.getProperties().remove(Constants.LOG4J_CONTEXT_SELECTOR);
    }
}
 

@Test
public void testBuilder() throws Exception {
    final ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder();
    builder.setStatusLevel(Level.ERROR);
    builder.setConfigurationName("BuilderTest");
    builder.add(builder.newFilter("ThresholdFilter", Filter.Result.ACCEPT, Filter.Result.NEUTRAL)
            .addAttribute("level", Level.DEBUG));
    final AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE").addAttribute("target",
            ConsoleAppender.Target.SYSTEM_OUT);
    appenderBuilder.add(builder.newLayout("PatternLayout").
            addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
    appenderBuilder.add(builder.newFilter("MarkerFilter", Filter.Result.DENY,
            Filter.Result.NEUTRAL).addAttribute("marker", "FLOW"));
    builder.add(appenderBuilder);
    builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG).
            add(builder.newAppenderRef("Stdout")).
            addAttribute("additivity", false));
    builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout")));
    ctx = Configurator.initialize(builder.build());
    final Configuration config = ctx.getConfiguration();
    assertNotNull("No configuration", config);
    assertEquals("Unexpected Configuration", "BuilderTest", config.getName());
    assertThat(config.getAppenders(), hasSize(equalTo(1)));
}
 

private void addTestFixtures(final String name, final ConfigurationBuilder<BuiltConfiguration> builder) {
    builder.setConfigurationName(name);
    builder.setStatusLevel(Level.ERROR);
    builder.setShutdownTimeout(5000, TimeUnit.MILLISECONDS);
    builder.add(builder.newScriptFile("target/test-classes/scripts/filter.groovy").addIsWatched(true));
    builder.add(builder.newFilter("ThresholdFilter", Filter.Result.ACCEPT, Filter.Result.NEUTRAL)
            .addAttribute("level", Level.DEBUG));

    final AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE").addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
    appenderBuilder.add(builder.newLayout("PatternLayout").
            addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
    appenderBuilder.add(builder.newFilter("MarkerFilter", Filter.Result.DENY,
            Filter.Result.NEUTRAL).addAttribute("marker", "FLOW"));
    builder.add(appenderBuilder);

    builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG, true).
                add(builder.newAppenderRef("Stdout")).
                addAttribute("additivity", false));
    builder.add(builder.newLogger("org.apache.logging.log4j.core").
                add(builder.newAppenderRef("Stdout")));
    builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout")));

    builder.addProperty("MyKey", "MyValue");
    builder.add(builder.newCustomLevel("Panic", 17));
    builder.setPackages("foo,bar");
}
 

public static Configuration addTestFixtures(final String name, final ConfigurationBuilder<BuiltConfiguration> builder) {
    builder.setConfigurationName(name);
    builder.setStatusLevel(Level.ERROR);
    builder.add(builder.newScriptFile("target/test-classes/scripts/filter.groovy").addIsWatched(true));
    builder.add(builder.newFilter("ThresholdFilter", Filter.Result.ACCEPT, Filter.Result.NEUTRAL)
            .addAttribute("level", Level.DEBUG));

    final AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE").addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
    appenderBuilder.add(builder.
            newLayout("PatternLayout").
            addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
    appenderBuilder.add(builder.
            newFilter("MarkerFilter", Filter.Result.DENY, Filter.Result.NEUTRAL).
            addAttribute("marker", "FLOW"));
    builder.add(appenderBuilder);

    builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG, true).
                add(builder.newAppenderRef("Stdout")).
                addAttribute("additivity", false));
    builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout")));

    builder.add(builder.newCustomLevel("Panic", 17));

    return builder.build();
}
 

private ConfigurationBuilder<BuiltConfiguration> buildConfigurationBuilder(final String filePattern) {
    final ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder();
    builder.setConfigurationName("LOG4J2-1964 demo");
    builder.setStatusLevel(Level.ERROR);
    // @formatter:off
    builder.add(builder.newAppender("consoleLog", "Console")
        .addAttribute("target", ConsoleAppender.Target.SYSTEM_ERR));
    builder.add(builder.newAppender("fooAppender", "RollingFile")
            .addAttribute("fileName", "target/rolling-update-date/foo.log")
            .addAttribute("filePattern", filePattern)
            .addComponent(builder.newComponent("SizeBasedTriggeringPolicy")
                    .addAttribute("size", "10MB")));
    builder.add(builder.newRootLogger(Level.INFO)
            .add(builder.newAppenderRef("consoleLog"))
            .add(builder.newAppenderRef("fooAppender")));
    // @formatter:on
    return builder;
}
 

public Configuration getConfiguration() {
    ConfigurationBuilder<BuiltConfiguration> builder = newConfigurationBuilder();
    builder.setStatusLevel(Level.ERROR)
        .setConfigurationName("ElasticAPM");

    Level level = Level.valueOf(getValue(LOG_LEVEL_KEY, sources, getValue(DEPRECATED_LOG_LEVEL_KEY, sources, Level.INFO.toString())));
    RootLoggerComponentBuilder rootLogger = builder.newRootLogger(level);
    List<AppenderComponentBuilder> appenders = createAppenders(builder);
    for (AppenderComponentBuilder appender : appenders) {
        rootLogger.add(builder.newAppenderRef(appender.getName()));
    }
    builder.add(rootLogger);
    return builder.build();
}
 

private LayoutComponentBuilder createLayout(ConfigurationBuilder<BuiltConfiguration> builder, LogFormat logFormat) {
    if (logFormat == LogFormat.PLAIN_TEXT) {
        return builder
                .newLayout("PatternLayout")
                .addAttribute("pattern", "%d [%thread] %-5level %logger{36} - %msg%n");
    } else {
        String serviceName = getValue(CoreConfiguration.SERVICE_NAME, sources, ServiceNameUtil.getDefaultServiceName());
        return builder.newLayout("EcsLayout")
            .addAttribute("eventDataset", serviceName + ".apm");
    }
}
 

private Configuration createConfiguration(final String name, ConfigurationBuilder<BuiltConfiguration> builder) {
    builder.setConfigurationName(name);
    builder.setStatusLevel(Level.ERROR);
    builder.add(builder.newFilter("ThresholdFilter", Filter.Result.ACCEPT, Filter.Result.NEUTRAL).addAttribute("level", level()));
    if (isConsoleAppenderEnabled()) {
        AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE").addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
        appenderBuilder.add(builder.newLayout("PatternLayout").addAttribute("pattern", "%d [%t] %-5level: %msg [%c][%X{msgId}]%n%throwable"));
        appenderBuilder.add(builder.newFilter("MarkerFilter", Filter.Result.DENY, Filter.Result.NEUTRAL).addAttribute("marker", "FLOW"));
        builder.add(appenderBuilder);
    }
    builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG).add(builder.newAppenderRef("Stdout")).addAttribute("additivity", false));
    builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout")));
    return builder.build();
}
 

public static void initialize(String logLevel) {
    if (System.getProperty(LOG4J_CONFIGURATION_FILE) == null) {
        ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder()
                .setStatusLevel(Level.ERROR)
                .setConfigurationName(LOG4J_CONFIGURATION_NAME);
        AppenderComponentBuilder appenderBuilder = builder.newAppender(APPENDER_NAME, APPENDER_PLUGIN_TYPE)
                .add(builder.newLayout(APPENDER_LAYOUT_PLUGIN_TYPE)
                        .addAttribute(APPENDER_PATTERN_KEY, APPENDER_PATTERN_VALUE));
        builder.add(appenderBuilder);
        switch (logLevel) {
            case TRACE_LOG_LEVEL:
                builder.add(builder.newRootLogger(Level.TRACE).add(builder.newAppenderRef(APPENDER_NAME)));
                break;
            case DEBUG_LOG_LEVEL:
                builder.add(builder.newRootLogger(Level.DEBUG).add(builder.newAppenderRef(APPENDER_NAME)));
                break;
            case INFO_LOG_LEVEL:
                builder.add(builder.newRootLogger(Level.INFO).add(builder.newAppenderRef(APPENDER_NAME)));
                break;
            case WARN_LOG_LEVEL:
                builder.add(builder.newRootLogger(Level.WARN).add(builder.newAppenderRef(APPENDER_NAME)));
                break;
            default:
                builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef(APPENDER_NAME)));
                break;
        }
        Configurator.initialize(builder.build());
    }
}
 

public static LoggerContext initializeLog4j() {
    ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder();
    builder.setStatusLevel(Level.ERROR); // show internal log4j2 errors
    builder.setConfigurationName("QuickAndDirtySetup");
    AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE")
            .addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
    appenderBuilder.add(builder.newLayout("PatternLayout")
            .addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
    builder.add(appenderBuilder);
    //builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG)
    //        .add(builder.newAppenderRef("Stdout")).addAttribute("additivity", false));
    builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout").addAttribute("level", Level.WARN)));
    return Configurator.initialize(builder.build());
}
 

public static LoggerContext initializeLog4j() {
    ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder();
    builder.setStatusLevel(Level.ERROR); // show internal log4j2 errors
    builder.setConfigurationName("QuickAndDirtySetup");
    AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE")
            .addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
    appenderBuilder.add(builder.newLayout("PatternLayout")
            .addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
    builder.add(appenderBuilder);
    //builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG)
    //        .add(builder.newAppenderRef("Stdout")).addAttribute("additivity", false));
    builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout").addAttribute("level", Level.WARN)));
    return Configurator.initialize(builder.build());
}
 

public static void initGuiLogging(String logFile) {
  ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder();
  builder.add(builder.newRootLogger(Level.INFO));
  LoggerContext context = Configurator.initialize(builder.build());

  PatternLayout layout = PatternLayout.newBuilder()
      .withPattern("[%d{ISO8601}] %5p (%F:%L) - %m%n")
      .withCharset(StandardCharsets.UTF_8)
      .build();

  Appender fileAppender = FileAppender.newBuilder()
      .setName("File")
      .setLayout(layout)
      .withFileName(logFile)
      .withAppend(false)
        .build();
  fileAppender.start();

  Appender textAreaAppender = TextAreaAppender.newBuilder()
      .setName("TextArea")
      .setLayout(layout)
      .build();
  textAreaAppender.start();

  context.getRootLogger().addAppender(fileAppender);
  context.getRootLogger().addAppender(textAreaAppender);
  context.updateLoggers();
}
 

public static Logger initializeFileLogger(String fileName, Level level, Class<?> clazz) {
  final ConfigurationBuilder<BuiltConfiguration> builder =
      ConfigurationBuilderFactory.newConfigurationBuilder();
  final AppenderComponentBuilder appenderBuilder =
      builder.newAppender("file", "File").addAttribute("fileName", fileName);
  builder.add(appenderBuilder);
  builder.add(
      builder.newLogger(clazz.getCanonicalName(), level).add(builder.newAppenderRef("file")));
  builder.add(builder.newRootLogger(level).add(builder.newAppenderRef("file")));
  final LoggerContext ctx = Configurator.initialize(builder.build());
  return LogManager.getLogger(clazz);
}
 

private void addTestFixtures(final String name, final ConfigurationBuilder<BuiltConfiguration> builder) {
    builder.setConfigurationName(name);
    builder.setStatusLevel(Level.ERROR);
    builder.setShutdownTimeout(5000, TimeUnit.MILLISECONDS);
    builder.add(builder.newScriptFile("target/test-classes/scripts/filter.groovy").addIsWatched(true));
    builder.add(builder.newFilter("ThresholdFilter", Filter.Result.ACCEPT, Filter.Result.NEUTRAL)
            .addAttribute("level", Level.DEBUG));

    final AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE").addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
    appenderBuilder.add(builder.newLayout("PatternLayout").
            addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
    appenderBuilder.add(builder.newFilter("MarkerFilter", Filter.Result.DENY,
            Filter.Result.NEUTRAL).addAttribute("marker", "FLOW"));
    builder.add(appenderBuilder);

    final AppenderComponentBuilder appenderBuilder2 = builder.newAppender("Pulsar", "Pulsar")
        .addAttribute("serviceUrl", "pulsar://localhost:6650")
        .addAttribute("topic", "my-topic");
    appenderBuilder2.add(builder.newLayout("GelfLayout").
        addAttribute("host", "my-host").
        addComponent(builder.newKeyValuePair("extraField", "extraValue")));
    builder.add(appenderBuilder2);

    builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG, true).
                add(builder.newAppenderRef("Stdout")).
                addAttribute("additivity", false));
    builder.add(builder.newLogger("org.apache.logging.log4j.core", Level.DEBUG).
                add(builder.newAppenderRef("Stdout")));
    builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout")));

    builder.addProperty("MyKey", "MyValue");
    builder.add(builder.newCustomLevel("Panic", 17));
    builder.setPackages("foo,bar");
}
 

@Test
public void testXmlConstructing() {
    //assumeTrue(System.lineSeparator().length() == 1); // Only run test on platforms with single character line endings (such as Linux), not on Windows
    final ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder();
    addTestFixtures("config name", builder);
    final String xmlConfiguration = builder.toXmlConfiguration();
    assertEquals(expectedXml, xmlConfiguration);
}
 

static Configuration addTestFixtures(final String name, final ConfigurationBuilder<BuiltConfiguration> builder) {
    builder.setConfigurationName(name);
    builder.setStatusLevel(Level.ERROR);
    builder.add(builder.newScriptFile("target/test-classes/scripts/filter.groovy").addIsWatched(true));
    builder.add(builder.newFilter("ThresholdFilter", Filter.Result.ACCEPT, Filter.Result.NEUTRAL)
            .addAttribute("level", Level.DEBUG));

    final AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE").addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
    appenderBuilder.add(builder.newLayout("PatternLayout").
            addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
    appenderBuilder.add(builder.newFilter("MarkerFilter", Filter.Result.DENY,
            Filter.Result.NEUTRAL).addAttribute("marker", "FLOW"));
    builder.add(appenderBuilder);

    final AppenderComponentBuilder appenderBuilder2 = builder.newAppender("Pulsar", "Pulsar")
        .addAttribute("serviceUrl", "pulsar://localhost:6650")
        .addAttribute("topic", "my-topic");
    appenderBuilder2.add(builder.newLayout("GelfLayout").
        addAttribute("host", "my-host").
        addComponent(builder.newKeyValuePair("extraField", "extraValue")));
    builder.add(appenderBuilder2);

    builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG, true).
                add(builder.newAppenderRef("Stdout")).
                addAttribute("additivity", false));
    builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout")));

    builder.add(builder.newCustomLevel("Panic", 17));

    return builder.build();
}
 

public static void intializeLoggers() {
    ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder();
    builder.setConfigurationName("logger");
    RootLoggerComponentBuilder rootLogger = builder.newRootLogger(Level.DEBUG);
    builder.add(rootLogger);

    Configurator.initialize(builder.build());
}
 

/**
 * Parses a Log4j 1.2 properties configuration file in ISO 8859-1 encoding into a ConfigurationBuilder.
 *
 * @param input
 *            InputStream to read from is assumed to be ISO 8859-1, and will not be closed.
 * @return the populated ConfigurationBuilder, never {@literal null}
 * @throws IOException
 *             if unable to read the input
 * @throws ConfigurationException
 *             if the input does not contain a valid configuration
 */
public ConfigurationBuilder<BuiltConfiguration> buildConfigurationBuilder(final InputStream input)
        throws IOException {
    try {
        properties.load(input);
        strSubstitutorProperties = new StrSubstitutor(properties);
        strSubstitutorSystem = new StrSubstitutor(System.getProperties());
        final String rootCategoryValue = getLog4jValue(ROOTCATEGORY);
        final String rootLoggerValue = getLog4jValue(ROOTLOGGER);
        if (rootCategoryValue == null && rootLoggerValue == null) {
            // This is not a Log4j 1 properties configuration file.
            warn("Missing " + ROOTCATEGORY + " or " + ROOTLOGGER + " in " + input);
            // throw new ConfigurationException(
            // "Missing " + ROOTCATEGORY + " or " + ROOTLOGGER + " in " + input);
        }
        builder.setConfigurationName("Log4j1");
        // DEBUG
        final String debugValue = getLog4jValue("debug");
        if (Boolean.valueOf(debugValue)) {
            builder.setStatusLevel(Level.DEBUG);
        }
        // Root
        buildRootLogger(getLog4jValue(ROOTCATEGORY));
        buildRootLogger(getLog4jValue(ROOTLOGGER));
        // Appenders
        final Map<String, String> appenderNameToClassName = buildClassToPropertyPrefixMap();
        for (final Map.Entry<String, String> entry : appenderNameToClassName.entrySet()) {
            final String appenderName = entry.getKey();
            final String appenderClass = entry.getValue();
            buildAppender(appenderName, appenderClass);
        }
        // Loggers
        buildLoggers("log4j.category.");
        buildLoggers("log4j.logger.");
        buildProperties();
        return builder;
    } catch (final IllegalArgumentException e) {
        throw new ConfigurationException(e);
    }
}
 

@Override
public Configuration getConfiguration(final LoggerContext loggerContext, final ConfigurationSource source) {
    final ConfigurationBuilder<BuiltConfiguration> builder;
    try (final InputStream configStream = source.getInputStream()) {
        builder = new Log4j1ConfigurationParser().buildConfigurationBuilder(configStream);
    } catch (final IOException e) {
        throw new ConfigurationException("Unable to load " + source, e);
    }
    return builder.build();
}
 

/**
 * Parses a Log4j 1.2 properties configuration file in ISO 8859-1 encoding into a ConfigurationBuilder.
 *
 * @param input
 *            InputStream to read from is assumed to be ISO 8859-1, and will not be closed.
 * @return the populated ConfigurationBuilder, never {@literal null}
 * @throws IOException
 *             if unable to read the input
 * @throws ConfigurationException
 *             if the input does not contain a valid configuration
 */
public ConfigurationBuilder<BuiltConfiguration> buildConfigurationBuilder(final InputStream input)
        throws IOException {
    try {
        properties.load(input);
        strSubstitutorProperties = new StrSubstitutor(properties);
        strSubstitutorSystem = new StrSubstitutor(System.getProperties());
        final String rootCategoryValue = getLog4jValue(ROOTCATEGORY);
        final String rootLoggerValue = getLog4jValue(ROOTLOGGER);
        if (rootCategoryValue == null && rootLoggerValue == null) {
            // This is not a Log4j 1 properties configuration file.
            warn("Missing " + ROOTCATEGORY + " or " + ROOTLOGGER + " in " + input);
            // throw new ConfigurationException(
            // "Missing " + ROOTCATEGORY + " or " + ROOTLOGGER + " in " + input);
        }
        builder.setConfigurationName("Log4j1");
        // DEBUG
        final String debugValue = getLog4jValue("debug");
        if (Boolean.valueOf(debugValue)) {
            builder.setStatusLevel(Level.DEBUG);
        }
        // Root
        buildRootLogger(getLog4jValue(ROOTCATEGORY));
        buildRootLogger(getLog4jValue(ROOTLOGGER));
        // Appenders
        final Map<String, String> appenderNameToClassName = buildClassToPropertyPrefixMap();
        for (final Map.Entry<String, String> entry : appenderNameToClassName.entrySet()) {
            final String appenderName = entry.getKey();
            final String appenderClass = entry.getValue();
            buildAppender(appenderName, appenderClass);
        }
        // Loggers
        buildLoggers("log4j.category.");
        buildLoggers("log4j.logger.");
        buildProperties();
        return builder;
    } catch (final IllegalArgumentException e) {
        throw new ConfigurationException(e);
    }
}
 

@Override
public Configuration getConfiguration(final LoggerContext loggerContext, final ConfigurationSource source) {
    final ConfigurationBuilder<BuiltConfiguration> builder;
    try (final InputStream configStream = source.getInputStream()) {
        builder = new Log4j1ConfigurationParser().buildConfigurationBuilder(configStream);
    } catch (final IOException e) {
        throw new ConfigurationException("Unable to load " + source, e);
    }
    return builder.build();
}
 

private void addTestFixtures(final String name, final ConfigurationBuilder<BuiltConfiguration> builder) {
    builder.setConfigurationName(name);
    builder.setStatusLevel(Level.ERROR);
    builder.setShutdownTimeout(5000, TimeUnit.MILLISECONDS);
    builder.add(builder.newScriptFile("target/test-classes/scripts/filter.groovy").addIsWatched(true));
    builder.add(builder.newFilter("ThresholdFilter", Filter.Result.ACCEPT, Filter.Result.NEUTRAL)
            .addAttribute("level", Level.DEBUG));

    final AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE").addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
    appenderBuilder.add(builder.newLayout("PatternLayout").
            addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
    appenderBuilder.add(builder.newFilter("MarkerFilter", Filter.Result.DENY,
            Filter.Result.NEUTRAL).addAttribute("marker", "FLOW"));
    builder.add(appenderBuilder);

    final AppenderComponentBuilder appenderBuilder2 = builder.newAppender("Kafka", "Kafka").addAttribute("topic", "my-topic");
    appenderBuilder2.addComponent(builder.newProperty("bootstrap.servers", "localhost:9092"));
    appenderBuilder2.add(builder.newLayout("GelfLayout").
        addAttribute("host", "my-host").
        addComponent(builder.newKeyValuePair("extraField", "extraValue")));
    builder.add(appenderBuilder2);

    builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG, true).
                add(builder.newAppenderRef("Stdout")).
                addAttribute("additivity", false));
    builder.add(builder.newLogger("org.apache.logging.log4j.core").
                add(builder.newAppenderRef("Stdout")));
    builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout")));

    builder.addProperty("MyKey", "MyValue");
    builder.add(builder.newCustomLevel("Panic", 17));
    builder.setPackages("foo,bar");
}
 

@Test
public void testXmlConstructing() throws Exception {
    //assumeTrue(System.lineSeparator().length() == 1); // Only run test on platforms with single character line endings (such as Linux), not on Windows
    final ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder();
    addTestFixtures("config name", builder);
    final String xmlConfiguration = builder.toXmlConfiguration();
    assertEquals(expectedXml, xmlConfiguration);
}
 

static Configuration addTestFixtures(final String name, final ConfigurationBuilder<BuiltConfiguration> builder) {
    builder.setConfigurationName(name);
    builder.setStatusLevel(Level.ERROR);
    builder.add(builder.newScriptFile("target/test-classes/scripts/filter.groovy").addIsWatched(true));
    builder.add(builder.newFilter("ThresholdFilter", Filter.Result.ACCEPT, Filter.Result.NEUTRAL)
            .addAttribute("level", Level.DEBUG));

    final AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE").addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
    appenderBuilder.add(builder.newLayout("PatternLayout").
            addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
    appenderBuilder.add(builder.newFilter("MarkerFilter", Filter.Result.DENY,
            Filter.Result.NEUTRAL).addAttribute("marker", "FLOW"));
    builder.add(appenderBuilder);

    final AppenderComponentBuilder appenderBuilder2 = builder.newAppender("Kafka", "Kafka").addAttribute("topic", "my-topic");
    appenderBuilder2.addComponent(builder.newProperty("bootstrap.servers", "localhost:9092"));
    appenderBuilder2.add(builder.newLayout("GelfLayout").
        addAttribute("host", "my-host").
        addComponent(builder.newKeyValuePair("extraField", "extraValue")));
    builder.add(appenderBuilder2);

    builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG, true).
                add(builder.newAppenderRef("Stdout")).
                addAttribute("additivity", false));
    builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout")));

    builder.add(builder.newCustomLevel("Panic", 17));

    return builder.build();
}
 

@Override
public ConfigurationBuilder<T> add(final RootLoggerComponentBuilder builder) {
    for (final Component c : loggers.getComponents()) {
        if (c.getPluginType().equals(LoggerConfig.ROOT)) {
            throw new ConfigurationException("Root Logger was previously defined");
        }
    }
    return add(loggers, builder);
}