/**
* Create a PatternParser.
*
* @param config The Configuration.
* @param filterClass Filter the returned plugins after calling the plugin manager.
* @return The PatternParser.
*/
private static PatternParser createPatternParser(
final Configuration config, final Class<? extends PatternConverter> filterClass) {
if (config == null) {
return new PatternParser(
config, PatternLayout.KEY, LogEventPatternConverter.class, filterClass);
}
PatternParser parser = config.getComponent(COMPONENT_KEY);
if (parser == null) {
parser = new PatternParser(config, PatternLayout.KEY, ThrowablePatternConverter.class);
config.addComponent(COMPONENT_KEY, parser);
parser = (PatternParser) config.getComponent(COMPONENT_KEY);
}
return parser;
}
/**
* Sets the Configuration to be used.
*
* @param config The new Configuration.
* @return The previous Configuration.
*/
private Configuration setConfiguration(final Configuration config) {
Objects.requireNonNull(config, "No Configuration was provided");
configLock.lock();
try {
final Configuration prev = this.configuration;
config.addListener(this);
final ConcurrentMap<String, String> map =
config.getComponent(Configuration.CONTEXT_PROPERTIES);
try { // LOG4J2-719 network access may throw android.os.NetworkOnMainThreadException
map.putIfAbsent("hostName", NetUtils.getLocalHostname());
} catch (final Exception ex) {
LOGGER.debug("Ignoring {}, setting hostName to 'unknown'", ex.toString());
map.putIfAbsent("hostName", "unknown");
}
map.putIfAbsent("contextName", contextName);
config.start();
this.configuration = config;
updateLoggers();
if (prev != null) {
prev.removeListener(this);
prev.stop();
}
firePropertyChangeEvent(new PropertyChangeEvent(this, PROPERTY_CONFIG, prev, config));
try {
Server.reregisterMBeansAfterReconfigure();
} catch (final Throwable t) {
// LOG4J2-716: Android has no java.lang.management
LOGGER.error("Could not reconfigure JMX", t);
}
Log4jLogEvent.setNanoClock(NanoClockFactory.createNanoClock());
AsyncLogger.setNanoClock(NanoClockFactory.createNanoClock());
return prev;
} finally {
configLock.unlock();
}
}