private static WaitStrategy createWaitStrategy() {
final String strategy =
PropertiesUtil.getProperties().getStringProperty("AsyncLogger.WaitStrategy");
LOGGER.debug("property AsyncLogger.WaitStrategy={}", strategy);
if ("Sleep".equals(strategy)) {
return new SleepingWaitStrategy();
} else if ("Yield".equals(strategy)) {
return new YieldingWaitStrategy();
} else if ("Block".equals(strategy)) {
return new BlockingWaitStrategy();
}
LOGGER.debug("disruptor event handler uses BlockingWaitStrategy");
return new BlockingWaitStrategy();
}
@AfterClass
public static void cleanupClass() {
System.clearProperty(ConfigurationFactory.CONFIGURATION_FILE_PROPERTY);
final LoggerContext ctx = LoggerContext.getContext();
ctx.reconfigure();
StatusLogger.getLogger().reset();
}
/** Container for the language and body of a script. */
@Plugin(name = "Script", category = Node.CATEGORY, printObject = true)
public class Script extends AbstractScript {
private static final Logger logger = StatusLogger.getLogger();
public Script(String name, String language, String scriptText) {
super(name, language, scriptText);
}
@PluginFactory
public static Script createScript(
// @formatter:off
@PluginAttribute("name") final String name,
@PluginAttribute("language") String language,
@PluginValue("scriptText") final String scriptText) {
// @formatter:on
if (language == null) {
logger.info("No script language supplied, defaulting to {}", DEFAULT_LANGUAGE);
language = DEFAULT_LANGUAGE;
}
if (scriptText == null) {
logger.error("No scriptText attribute provided for ScriptFile {}", name);
return null;
}
return new Script(name, language, scriptText);
}
@Override
public String toString() {
return getName() != null ? getName() : super.toString();
}
}
static {
initInfoForExecutorThread();
LOGGER.debug("AsyncLogger.ThreadNameStrategy={}", THREAD_NAME_STRATEGY);
final int ringBufferSize = calculateRingBufferSize();
final WaitStrategy waitStrategy = createWaitStrategy();
disruptor =
new Disruptor<>(
RingBufferLogEvent.FACTORY, ringBufferSize, EXECUTOR, ProducerType.MULTI, waitStrategy);
disruptor.handleExceptionsWith(getExceptionHandler());
disruptor.handleEventsWith(new RingBufferLogEventHandler());
LOGGER.debug(
"Starting AsyncLogger disruptor with ringbuffer size {}...",
disruptor.getRingBuffer().getBufferSize());
disruptor.start();
}
private static ExceptionHandler<RingBufferLogEvent> getExceptionHandler() {
final String cls =
PropertiesUtil.getProperties().getStringProperty("AsyncLogger.ExceptionHandler");
if (cls == null) {
LOGGER.debug("No AsyncLogger.ExceptionHandler specified");
return null;
}
try {
@SuppressWarnings("unchecked")
final ExceptionHandler<RingBufferLogEvent> result =
Loader.newCheckedInstanceOf(cls, ExceptionHandler.class);
LOGGER.debug("AsyncLogger.ExceptionHandler={}", result);
return result;
} catch (final Exception ignored) {
LOGGER.debug("AsyncLogger.ExceptionHandler not set: error creating " + cls + ": ", ignored);
return null;
}
}
private void enqueueLogMessageInfo(Info info) {
// LOG4J2-639: catch NPE if disruptor field was set to null after our check above
try {
// Note: do NOT use the temp variable above!
// That could result in adding a log event to the disruptor after it was shut down,
// which could cause the publishEvent method to hang and never return.
disruptor.publishEvent(info.translator);
} catch (final NullPointerException npe) {
LOGGER.fatal("Ignoring log event after log4j was shut down.");
}
}
static ThreadNameStrategy create() {
final String name =
PropertiesUtil.getProperties()
.getStringProperty("AsyncLogger.ThreadNameStrategy", CACHED.name());
try {
return ThreadNameStrategy.valueOf(name);
} catch (final Exception ex) {
LOGGER.debug(
"Using AsyncLogger.ThreadNameStrategy.CACHED: '{}' not valid: {}", name, ex.toString());
return CACHED;
}
}
private static int calculateRingBufferSize() {
int ringBufferSize = RINGBUFFER_DEFAULT_SIZE;
final String userPreferredRBSize =
PropertiesUtil.getProperties()
.getStringProperty("AsyncLogger.RingBufferSize", String.valueOf(ringBufferSize));
try {
int size = Integer.parseInt(userPreferredRBSize);
if (size < RINGBUFFER_MIN_SIZE) {
size = RINGBUFFER_MIN_SIZE;
LOGGER.warn(
"Invalid RingBufferSize {}, using minimum size {}.",
userPreferredRBSize,
RINGBUFFER_MIN_SIZE);
}
ringBufferSize = size;
} catch (final Exception ex) {
LOGGER.warn(
"Invalid RingBufferSize {}, using default size {}.", userPreferredRBSize, ringBufferSize);
}
return Integers.ceilingNextPowerOfTwo(ringBufferSize);
}
@Override
public void logMessage(
final String fqcn,
final Level level,
final Marker marker,
final Message message,
final Throwable thrown) {
final Disruptor<RingBufferLogEvent> temp = disruptor;
if (temp == null) { // LOG4J2-639
LOGGER.fatal("Ignoring log event after log4j was shut down");
} else {
logMessage0(temp, fqcn, level, marker, message, thrown);
}
}
public abstract class AbstractRolloverStrategy implements RolloverStrategy {
protected static final Logger LOGGER = StatusLogger.getLogger();
public AbstractRolloverStrategy() {}
}
/**
* PathCondition that accepts paths after the accumulated file size threshold is exceeded during the
* file tree walk.
*/
@Plugin(name = "IfAccumulatedFileSize", category = "Core", printObject = true)
public final class IfAccumulatedFileSize implements PathCondition {
private static final Logger LOGGER = StatusLogger.getLogger();
private final long thresholdBytes;
private long accumulatedSize;
private final PathCondition[] nestedConditions;
private IfAccumulatedFileSize(final long thresholdSize, final PathCondition[] nestedConditions) {
if (thresholdSize <= 0) {
throw new IllegalArgumentException(
"Count must be a positive integer but was " + thresholdSize);
}
this.thresholdBytes = thresholdSize;
this.nestedConditions =
nestedConditions == null
? new PathCondition[0]
: Arrays.copyOf(nestedConditions, nestedConditions.length);
}
public long getThresholdBytes() {
return thresholdBytes;
}
public List<PathCondition> getNestedConditions() {
return Collections.unmodifiableList(Arrays.asList(nestedConditions));
}
/*
* (non-Javadoc)
*
* @see org.apache.logging.log4j.core.appender.rolling.action.PathCondition#accept(java.nio.file.Path,
* java.nio.file.Path, java.nio.file.attribute.BasicFileAttributes)
*/
@Override
public boolean accept(
final Path basePath, final Path relativePath, final BasicFileAttributes attrs) {
accumulatedSize += attrs.size();
final boolean result = accumulatedSize > thresholdBytes;
final String match = result ? ">" : "<=";
final String accept = result ? "ACCEPTED" : "REJECTED";
LOGGER.trace(
"IfAccumulatedFileSize {}: {} accumulated size '{}' {} thresholdBytes '{}'",
accept,
relativePath,
accumulatedSize,
match,
thresholdBytes);
if (result) {
return IfAll.accept(nestedConditions, basePath, relativePath, attrs);
}
return result;
}
/*
* (non-Javadoc)
*
* @see org.apache.logging.log4j.core.appender.rolling.action.PathCondition#beforeFileTreeWalk()
*/
@Override
public void beforeFileTreeWalk() {
accumulatedSize = 0;
IfAll.beforeFileTreeWalk(nestedConditions);
}
/**
* Create an IfAccumulatedFileSize condition.
*
* @param threshold The threshold accumulated file size from which files will be deleted.
* @return An IfAccumulatedFileSize condition.
*/
@PluginFactory
public static IfAccumulatedFileSize createFileSizeCondition( //
// @formatter:off
@PluginAttribute("exceeds") final String size,
@PluginElement("PathConditions") final PathCondition... nestedConditions) {
// @formatter:on
if (size == null) {
LOGGER.error("IfAccumulatedFileSize missing mandatory size threshold.");
}
final long threshold = size == null ? Long.MAX_VALUE : FileSize.parse(size, Long.MAX_VALUE);
return new IfAccumulatedFileSize(threshold, nestedConditions);
}
@Override
public String toString() {
final String nested =
nestedConditions.length == 0 ? "" : " AND " + Arrays.toString(nestedConditions);
return "IfAccumulatedFileSize(exceeds=" + thresholdBytes + nested + ")";
}
}
/**
* LogEventListener server that receives LogEvents over a JMS {@link javax.jms.Destination}.
*
* @since 2.1
*/
public class JmsServer extends LogEventListener implements MessageListener, LifeCycle {
private static final Logger LOGGER = StatusLogger.getLogger();
private final AtomicReference<State> state = new AtomicReference<State>(State.INITIALIZED);
private final JmsManager jmsManager;
private MessageConsumer messageConsumer;
public JmsServer(
final String connectionFactoryBindingName,
final String destinationBindingName,
final String username,
final String password) {
final String managerName = JmsServer.class.getName() + '@' + JmsServer.class.hashCode();
final JndiManager jndiManager = JndiManager.getDefaultManager(managerName);
jmsManager =
JmsManager.getJmsManager(
managerName,
jndiManager,
connectionFactoryBindingName,
destinationBindingName,
username,
password);
}
@Override
public void onMessage(final Message message) {
try {
if (message instanceof ObjectMessage) {
final Object body = ((ObjectMessage) message).getObject();
if (body instanceof LogEvent) {
log((LogEvent) body);
} else {
LOGGER.warn(
"Expected ObjectMessage to contain LogEvent. Got type {} instead.", body.getClass());
}
} else {
LOGGER.warn(
"Received message of type {} and JMSType {} which cannot be handled.",
message.getClass(),
message.getJMSType());
}
} catch (final JMSException e) {
LOGGER.catching(e);
}
}
@Override
public void start() {
if (state.compareAndSet(State.INITIALIZED, State.STARTING)) {
try {
messageConsumer = jmsManager.createMessageConsumer();
messageConsumer.setMessageListener(this);
} catch (final JMSException e) {
throw new LoggingException(e);
}
}
}
@Override
public void stop() {
try {
messageConsumer.close();
} catch (final JMSException ignored) {
}
jmsManager.release();
}
@Override
public boolean isStarted() {
return state.get() == State.STARTED;
}
@Override
public boolean isStopped() {
return state.get() == State.STOPPED;
}
}
/** The MongoDB implementation of {@link NoSqlProvider}. */
@Plugin(name = "MongoDb", category = "Core", printObject = true)
public final class MongoDbProvider implements NoSqlProvider<MongoDbConnection> {
private static final WriteConcern DEFAULT_WRITE_CONCERN = WriteConcern.ACKNOWLEDGED;
private static final Logger LOGGER = StatusLogger.getLogger();
private static final int DEFAULT_PORT = 27017;
private final String collectionName;
private final DB database;
private final String description;
private final WriteConcern writeConcern;
private MongoDbProvider(
final DB database,
final WriteConcern writeConcern,
final String collectionName,
final String description) {
this.database = database;
this.writeConcern = writeConcern;
this.collectionName = collectionName;
this.description = "mongoDb{ " + description + " }";
}
@Override
public MongoDbConnection getConnection() {
return new MongoDbConnection(this.database, this.writeConcern, this.collectionName);
}
@Override
public String toString() {
return this.description;
}
/**
* Factory method for creating a MongoDB provider within the plugin manager.
*
* @param collectionName The name of the MongoDB collection to which log events should be written.
* @param writeConcernConstant The {@link WriteConcern} constant to control writing details,
* defaults to {@link WriteConcern#ACKNOWLEDGED}.
* @param writeConcernConstantClassName The name of a class containing the aforementioned static
* WriteConcern constant. Defaults to {@link WriteConcern}.
* @param databaseName The name of the MongoDB database containing the collection to which log
* events should be written. Mutually exclusive with {@code
* factoryClassName&factoryMethodName!=null}.
* @param server The host name of the MongoDB server, defaults to localhost and mutually exclusive
* with {@code factoryClassName&factoryMethodName!=null}.
* @param port The port the MongoDB server is listening on, defaults to the default MongoDB port
* and mutually exclusive with {@code factoryClassName&factoryMethodName!=null}.
* @param userName The username to authenticate against the MongoDB server with.
* @param password The password to authenticate against the MongoDB server with.
* @param factoryClassName A fully qualified class name containing a static factory method capable
* of returning a {@link DB} or a {@link MongoClient}.
* @param factoryMethodName The name of the public static factory method belonging to the
* aforementioned factory class.
* @return a new MongoDB provider.
*/
@PluginFactory
public static MongoDbProvider createNoSqlProvider(
@PluginAttribute("collectionName") final String collectionName,
@PluginAttribute("writeConcernConstant") final String writeConcernConstant,
@PluginAttribute("writeConcernConstantClass") final String writeConcernConstantClassName,
@PluginAttribute("databaseName") final String databaseName,
@PluginAttribute(value = "server", defaultString = "localhost") @ValidHost
final String server,
@PluginAttribute(value = "port", defaultString = "" + DEFAULT_PORT) @ValidPort
final String port,
@PluginAttribute("userName") final String userName,
@PluginAttribute(value = "password", sensitive = true) final String password,
@PluginAttribute("factoryClassName") final String factoryClassName,
@PluginAttribute("factoryMethodName") final String factoryMethodName) {
DB database;
String description;
if (Strings.isNotEmpty(factoryClassName) && Strings.isNotEmpty(factoryMethodName)) {
try {
final Class<?> factoryClass = LoaderUtil.loadClass(factoryClassName);
final Method method = factoryClass.getMethod(factoryMethodName);
final Object object = method.invoke(null);
if (object instanceof DB) {
database = (DB) object;
} else if (object instanceof MongoClient) {
if (Strings.isNotEmpty(databaseName)) {
database = ((MongoClient) object).getDB(databaseName);
} else {
LOGGER.error(
"The factory method [{}.{}()] returned a MongoClient so the database name is "
+ "required.",
factoryClassName,
factoryMethodName);
return null;
}
} else if (object == null) {
LOGGER.error(
"The factory method [{}.{}()] returned null.", factoryClassName, factoryMethodName);
return null;
} else {
LOGGER.error(
"The factory method [{}.{}()] returned an unsupported type [{}].",
factoryClassName,
factoryMethodName,
object.getClass().getName());
return null;
}
description = "database=" + database.getName();
final List<ServerAddress> addresses = database.getMongo().getAllAddress();
if (addresses.size() == 1) {
description +=
", server=" + addresses.get(0).getHost() + ", port=" + addresses.get(0).getPort();
} else {
description += ", servers=[";
for (final ServerAddress address : addresses) {
description += " { " + address.getHost() + ", " + address.getPort() + " } ";
}
description += "]";
}
} catch (final ClassNotFoundException e) {
LOGGER.error("The factory class [{}] could not be loaded.", factoryClassName, e);
return null;
} catch (final NoSuchMethodException e) {
LOGGER.error(
"The factory class [{}] does not have a no-arg method named [{}].",
factoryClassName,
factoryMethodName,
e);
return null;
} catch (final Exception e) {
LOGGER.error(
"The factory method [{}.{}()] could not be invoked.",
factoryClassName,
factoryMethodName,
e);
return null;
}
} else if (Strings.isNotEmpty(databaseName)) {
final List<MongoCredential> credentials = new ArrayList<>();
description = "database=" + databaseName;
if (Strings.isNotEmpty(userName) && Strings.isNotEmpty(password)) {
description +=
", username="******", passwordHash="
+ NameUtil.md5(password + MongoDbProvider.class.getName());
credentials.add(
MongoCredential.createCredential(userName, databaseName, password.toCharArray()));
}
try {
final int portInt = TypeConverters.convert(port, int.class, DEFAULT_PORT);
description += ", server=" + server + ", port=" + portInt;
database =
new MongoClient(new ServerAddress(server, portInt), credentials).getDB(databaseName);
} catch (final Exception e) {
LOGGER.error(
"Failed to obtain a database instance from the MongoClient at server [{}] and "
+ "port [{}].",
server,
port);
return null;
}
} else {
LOGGER.error("No factory method was provided so the database name is required.");
return null;
}
try {
database.getCollectionNames(); // Check if the database actually requires authentication
} catch (final Exception e) {
LOGGER.error(
"The database is not up, or you are not authenticated, try supplying a username and password to the MongoDB provider.",
e);
return null;
}
final WriteConcern writeConcern =
toWriteConcern(writeConcernConstant, writeConcernConstantClassName);
return new MongoDbProvider(database, writeConcern, collectionName, description);
}
private static WriteConcern toWriteConcern(
final String writeConcernConstant, final String writeConcernConstantClassName) {
WriteConcern writeConcern;
if (Strings.isNotEmpty(writeConcernConstant)) {
if (Strings.isNotEmpty(writeConcernConstantClassName)) {
try {
final Class<?> writeConcernConstantClass =
LoaderUtil.loadClass(writeConcernConstantClassName);
final Field field = writeConcernConstantClass.getField(writeConcernConstant);
writeConcern = (WriteConcern) field.get(null);
} catch (final Exception e) {
LOGGER.error(
"Write concern constant [{}.{}] not found, using default.",
writeConcernConstantClassName,
writeConcernConstant);
writeConcern = DEFAULT_WRITE_CONCERN;
}
} else {
writeConcern = WriteConcern.valueOf(writeConcernConstant);
if (writeConcern == null) {
LOGGER.warn(
"Write concern constant [{}] not found, using default.", writeConcernConstant);
writeConcern = DEFAULT_WRITE_CONCERN;
}
}
} else {
writeConcern = DEFAULT_WRITE_CONCERN;
}
return writeConcern;
}
}
/**
* Creates {@link AsyncEventRouter} instances based on user-specified system properties. The {@code
* AsyncEventRouter} created by this factory is used in AsyncLogger, AsyncLoggerConfig and
* AsyncAppender to control if events are logged in the current thread, the background thread, or
* discarded.
*
* <p>Property {@code "log4j2.AsyncEventRouter"} controls the routing behaviour. If this property is
* not specified or has value {@code "Default"}, this factory creates {@link
* DefaultAsyncEventRouter} objects.
*
* <p>If this property has value {@code "Discard"}, this factory creates {@link
* DiscardingAsyncEventRouter} objects. By default, this router discards events of level {@code
* INFO}, {@code DEBUG} and {@code TRACE} if the queue is full. This can be adjusted with property
* {@code "log4j2.DiscardThreshold"} (name of the level at which to start discarding).
*
* <p>For any other value, this factory interprets the value as the fully qualified name of a class
* implementing the {@link AsyncEventRouter} interface. The class must have a default constructor.
*
* @since 2.6
*/
public class AsyncEventRouterFactory {
static final String PROPERTY_NAME_ASYNC_EVENT_ROUTER = "log4j2.AsyncEventRouter";
static final String PROPERTY_VALUE_DEFAULT_ASYNC_EVENT_ROUTER = "Default";
static final String PROPERTY_VALUE_DISCARDING_ASYNC_EVENT_ROUTER = "Discard";
static final String PROPERTY_NAME_DISCARDING_THRESHOLD_LEVEL = "log4j2.DiscardThreshold";
private static final Logger LOGGER = StatusLogger.getLogger();
/**
* Creates and returns {@link AsyncEventRouter} instances based on user-specified system
* properties.
*
* <p>Property {@code "log4j2.AsyncEventRouter"} controls the routing behaviour. If this property
* is not specified or has value {@code "Default"}, this method returns {@link
* DefaultAsyncEventRouter} objects.
*
* <p>If this property has value {@code "Discard"}, this method returns {@link
* DiscardingAsyncEventRouter} objects.
*
* <p>For any other value, this method interprets the value as the fully qualified name of a class
* implementing the {@link AsyncEventRouter} interface. The class must have a default constructor.
*
* @return a new AsyncEventRouter
*/
public static AsyncEventRouter create() {
final String router =
PropertiesUtil.getProperties().getStringProperty(PROPERTY_NAME_ASYNC_EVENT_ROUTER);
if (router == null
|| PROPERTY_VALUE_DEFAULT_ASYNC_EVENT_ROUTER.equals(router)
|| DefaultAsyncEventRouter.class.getSimpleName().equals(router)
|| DefaultAsyncEventRouter.class.getName().equals(router)) {
return new DefaultAsyncEventRouter();
}
if (PROPERTY_VALUE_DISCARDING_ASYNC_EVENT_ROUTER.equals(router)
|| DiscardingAsyncEventRouter.class.getSimpleName().equals(router)
|| DiscardingAsyncEventRouter.class.getName().equals(router)) {
return createDiscardingAsyncEventRouter();
}
return createCustomRouter(router);
}
private static AsyncEventRouter createCustomRouter(final String router) {
try {
final Class<? extends AsyncEventRouter> cls =
LoaderUtil.loadClass(router).asSubclass(AsyncEventRouter.class);
LOGGER.debug("Creating custom AsyncEventRouter '{}'", router);
return cls.newInstance();
} catch (final Exception ex) {
LOGGER.debug(
"Using DefaultAsyncEventRouter. Could not create custom AsyncEventRouter '{}': {}",
router,
ex.toString());
return new DefaultAsyncEventRouter();
}
}
private static AsyncEventRouter createDiscardingAsyncEventRouter() {
final PropertiesUtil util = PropertiesUtil.getProperties();
final String level =
util.getStringProperty(PROPERTY_NAME_DISCARDING_THRESHOLD_LEVEL, Level.INFO.name());
final Level thresholdLevel = Level.toLevel(level, Level.INFO);
LOGGER.debug("Creating custom DiscardingAsyncEventRouter(discardThreshold:{})", thresholdLevel);
return new DiscardingAsyncEventRouter(thresholdLevel);
}
}
/**
* Base class for PluginVisitor implementations. Provides convenience methods as well as all method
* implementations other than the {@code visit} method.
*
* @param <A> the Plugin annotation type.
*/
public abstract class AbstractPluginVisitor<A extends Annotation> implements PluginVisitor<A> {
protected static final Logger LOGGER = StatusLogger.getLogger();
protected final Class<A> clazz;
protected A annotation;
protected String[] aliases;
protected Class<?> conversionType;
protected StrSubstitutor substitutor;
protected Member member;
/**
* This constructor must be overridden by implementation classes as a no-arg constructor.
*
* @param clazz the annotation class this PluginVisitor is for.
*/
protected AbstractPluginVisitor(final Class<A> clazz) {
this.clazz = clazz;
}
@SuppressWarnings("unchecked")
@Override
public PluginVisitor<A> setAnnotation(final Annotation annotation) {
final Annotation a = Assert.requireNonNull(annotation, "No annotation was provided");
if (this.clazz.isInstance(a)) {
this.annotation = (A) a;
}
return this;
}
@Override
public PluginVisitor<A> setAliases(final String... aliases) {
this.aliases = aliases;
return this;
}
@Override
public PluginVisitor<A> setConversionType(final Class<?> conversionType) {
this.conversionType =
Assert.requireNonNull(conversionType, "No conversion type class was provided");
return this;
}
@Override
public PluginVisitor<A> setStrSubstitutor(final StrSubstitutor substitutor) {
this.substitutor = Assert.requireNonNull(substitutor, "No StrSubstitutor was provided");
return this;
}
@Override
public PluginVisitor<A> setMember(final Member member) {
this.member = member;
return this;
}
/**
* Removes an Entry from a given Map using a key name and aliases for that key. Keys are
* case-insensitive.
*
* @param attributes the Map to remove an Entry from.
* @param name the key name to look up.
* @param aliases optional aliases of the key name to look up.
* @return the value corresponding to the given key or {@code null} if nonexistent.
*/
protected static String removeAttributeValue(
final Map<String, String> attributes, final String name, final String... aliases) {
for (final Map.Entry<String, String> entry : attributes.entrySet()) {
final String key = entry.getKey();
final String value = entry.getValue();
if (key.equalsIgnoreCase(name)) {
attributes.remove(key);
return value;
}
if (aliases != null) {
for (final String alias : aliases) {
if (key.equalsIgnoreCase(alias)) {
attributes.remove(key);
return value;
}
}
}
}
return null;
}
/**
* Converts the given value into the configured type falling back to the provided default value.
*
* @param value the value to convert.
* @param defaultValue the fallback value to use in case of no value or an error.
* @return the converted value whether that be based on the given value or the default value.
*/
protected Object convert(final String value, final Object defaultValue) {
if (defaultValue instanceof String) {
return TypeConverters.convert(
value, this.conversionType, Strings.trimToNull((String) defaultValue));
}
return TypeConverters.convert(value, this.conversionType, defaultValue);
}
}
public class ElasticsearchHttpClient {
private static final Logger logger = StatusLogger.getLogger();
private static final char[] HEX_CHARS = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
};
private static final Set<Character> JS_ESCAPE_CHARS;
static {
Set<Character> mandatoryEscapeSet = new HashSet<Character>();
mandatoryEscapeSet.add('"');
mandatoryEscapeSet.add('\\');
JS_ESCAPE_CHARS = Collections.unmodifiableSet(mandatoryEscapeSet);
}
private final Queue<String> requests = new ConcurrentLinkedQueue<String>();
private final ReentrantLock lock = new ReentrantLock(true);
private final String url;
private final String index;
private final String type;
private final boolean create;
private final int maxActionsPerBulkRequest;
private final boolean logresponses;
private final ScheduledExecutorService service;
private volatile boolean closed = false;
private HttpURLConnection connection;
public ElasticsearchHttpClient(
String url,
String index,
String type,
boolean create,
int maxActionsPerBulkRequest,
long flushSecs,
boolean logresponses) {
this.url = url;
this.index = index;
this.type = type;
this.create = create;
this.maxActionsPerBulkRequest = maxActionsPerBulkRequest;
this.logresponses = logresponses;
this.closed = false;
this.service = Executors.newScheduledThreadPool(1);
service.schedule(
new Callable<Object>() {
@Override
public Object call() throws Exception {
try {
flush();
} catch (IOException e) {
logger.error(e.getMessage(), e);
throw new AppenderLoggingException(e);
}
return null;
}
},
flushSecs,
TimeUnit.SECONDS);
}
public ElasticsearchHttpClient index(Map<String, Object> source) {
if (closed) {
logger.error("logger is closed");
throw new AppenderLoggingException("logger is closed");
}
try {
requests.add(build(index, type, create, source));
} catch (Exception e) {
logger.error(e);
closed = true;
}
return this;
}
public void flush() throws IOException {
lock.lock();
try {
while (!requests.isEmpty()) {
if (closed) {
logger.error("logger is closed");
return;
}
if (connection == null) {
connection = (HttpURLConnection) new URL(url).openConnection();
}
try {
connection.setDoOutput(true);
connection.setRequestMethod("POST");
} catch (Exception e) {
logger.error(e);
// retry
connection = (HttpURLConnection) new URL(url).openConnection();
connection.setDoOutput(true);
connection.setRequestMethod("POST");
}
StringBuilder sb = new StringBuilder();
int i = maxActionsPerBulkRequest;
String request;
while ((request = requests.poll()) != null && (i-- >= 0)) {
sb.append(request);
}
OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");
writer.write(sb.toString());
writer.close();
if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
// read response
if (logresponses) {
sb.setLength(0);
BufferedReader in =
new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
String s;
while ((s = in.readLine()) != null) {
sb.append(s);
}
in.close();
logger.info(sb.toString());
}
} else {
throw new AppenderLoggingException(
"no OK response: "
+ connection.getResponseCode()
+ " "
+ connection.getResponseMessage());
}
}
} catch (Throwable t) {
logger.error(t);
closed = true;
throw new AppenderLoggingException("Elasticsearch HTTP error", t);
} finally {
lock.unlock();
}
}
public void close() throws IOException {
if (!closed) {
service.shutdownNow();
flush();
connection.getOutputStream().close();
connection.disconnect();
}
closed = true;
}
private String build(String index, String type, boolean create, Map<String, Object> source) {
index = index.indexOf('\'') < 0 ? index : getIndexNameDateFormat(index).format(new Date());
StringBuilder sb = new StringBuilder();
sb.append("{\"")
.append(create ? "create" : "index")
.append("\":{\"_index\":\"")
.append(index)
.append("\",\"_type\":\"")
.append(type)
.append("\"}}\n{");
build(sb, source);
sb.append("}\n");
return sb.toString();
}
@SuppressWarnings("unchecked")
private void build(StringBuilder sb, Object object) {
if (object instanceof Map) {
sb.append('{');
build(sb, (Map<String, Object>) object);
sb.append('}');
} else if (object instanceof List) {
sb.append("[");
build(sb, (List<Object>) object);
sb.append("]");
} else if (object != null) {
if (object instanceof Number) {
sb.append(object);
} else if (object instanceof Boolean) {
sb.append(((Boolean) object) ? "true" : "false");
} else if (object instanceof Date) {
sb.append('"');
sb.append(format((Date) object));
sb.append('"');
} else {
sb.append('"');
escape(sb, object.toString());
sb.append('"');
}
} else {
sb.append("null");
}
}
private void build(StringBuilder sb, List<Object> list) {
boolean started = false;
for (Object object : list) {
if (started) {
sb.append(',');
}
build(sb, object);
started = true;
}
}
private void build(StringBuilder sb, Map<String, Object> map) {
boolean started = false;
for (Map.Entry<String, Object> me : map.entrySet()) {
if (started) {
sb.append(',');
}
// try to parse message as JSON
if ("message".equals(me.getKey()) && me.getValue() != null) {
JsonParser parser = new JsonParser(new StringReader(me.getValue().toString()));
try {
build(sb, (Map<String, Object>) parser.parse());
} catch (Throwable e) {
sb.append("\"").append(me.getKey()).append("\":");
build(sb, me.getValue());
}
} else {
sb.append("\"").append(me.getKey()).append("\":");
build(sb, me.getValue());
}
started = true;
}
}
private void escape(StringBuilder out, CharSequence plainText) {
int pos = 0;
int len = plainText.length();
for (int charCount, i = 0; i < len; i += charCount) {
int codePoint = Character.codePointAt(plainText, i);
charCount = Character.charCount(codePoint);
if (!isControlCharacter(codePoint) && !mustEscapeCharInJsString(codePoint)) {
continue;
}
out.append(plainText, pos, i);
pos = i + charCount;
switch (codePoint) {
case '\b':
out.append("\\b");
break;
case '\t':
out.append("\\t");
break;
case '\n':
out.append("\\n");
break;
case '\f':
out.append("\\f");
break;
case '\r':
out.append("\\r");
break;
case '\\':
out.append("\\\\");
break;
case '/':
out.append("\\/");
break;
case '"':
out.append("\\\"");
break;
default:
appendHexJavaScriptRepresentation(out, codePoint);
break;
}
}
out.append(plainText, pos, len);
}
private boolean isControlCharacter(int codePoint) {
return codePoint < 0x20
|| codePoint == 0x2028 // Line separator
|| codePoint == 0x2029 // Paragraph separator
|| (codePoint >= 0x7f && codePoint <= 0x9f);
}
private void appendHexJavaScriptRepresentation(StringBuilder sb, int codePoint) {
sb.append("\\u")
.append(HEX_CHARS[(codePoint >>> 12) & 0xf])
.append(HEX_CHARS[(codePoint >>> 8) & 0xf])
.append(HEX_CHARS[(codePoint >>> 4) & 0xf])
.append(HEX_CHARS[codePoint & 0xf]);
}
private boolean mustEscapeCharInJsString(int codepoint) {
if (!Character.isSupplementaryCodePoint(codepoint)) {
char c = (char) codepoint;
return JS_ESCAPE_CHARS.contains(c);
}
return false;
}
private static final String ISO_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.S'Z'";
private static final TimeZone GMT = TimeZone.getTimeZone("GMT");
private static final ThreadLocal<Map<String, SimpleDateFormat>> df =
new ThreadLocal<Map<String, SimpleDateFormat>>() {
public Map<String, SimpleDateFormat> initialValue() {
return new HashMap<String, SimpleDateFormat>();
}
};
private SimpleDateFormat getDateFormat(String format) {
Map<String, SimpleDateFormat> formatters = df.get();
SimpleDateFormat formatter = formatters.get(format);
if (formatter == null) {
formatter = new SimpleDateFormat();
formatter.applyPattern(ISO_FORMAT);
formatter.setTimeZone(GMT);
formatters.put(format, formatter);
}
return formatter;
}
private SimpleDateFormat getIndexNameDateFormat(String index) {
Map<String, SimpleDateFormat> formatters = df.get();
SimpleDateFormat formatter = formatters.get(index);
if (formatter == null) {
formatter = new SimpleDateFormat();
formatter.applyPattern(index);
formatters.put(index, formatter);
}
return formatter;
}
private String format(Date date) {
if (date == null) {
return null;
}
return getDateFormat(ISO_FORMAT).format(date);
}
class JsonParser {
private static final int DEFAULT_BUFFER_SIZE = 1024;
private final Reader reader;
private final char[] buf;
private int index;
private int fill;
private int ch;
private StringBuilder sb;
private int start;
public JsonParser(Reader reader) {
this(reader, DEFAULT_BUFFER_SIZE);
}
public JsonParser(Reader reader, int buffersize) {
this.reader = reader;
buf = new char[buffersize];
start = -1;
}
public Object parse() throws IOException {
read();
skipBlank();
Object result = parseValue();
skipBlank();
if (ch != -1) {
throw new IOException("unexpected character: " + ch);
}
return result;
}
private Object parseValue() throws IOException {
switch (ch) {
case 'n':
return parseNull();
case 't':
return parseTrue();
case 'f':
return parseFalse();
case '"':
return parseString();
case '[':
return parseList();
case '{':
return parseMap();
case '-':
case '+':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
return parseNumber();
}
throw new IOException("value");
}
private List<Object> parseList() throws IOException {
read();
List<Object> list = new ArrayList<Object>();
skipBlank();
if (parseChar(']')) {
return list;
}
do {
skipBlank();
list.add(parseValue());
skipBlank();
} while (parseChar(','));
if (!parseChar(']')) {
expected("',' or ']'");
}
return list;
}
private Map<String, Object> parseMap() throws IOException {
read();
Map<String, Object> object = new LinkedHashMap<String, Object>();
skipBlank();
if (parseChar('}')) {
return object;
}
do {
skipBlank();
if (ch != '"') {
expected("name");
}
String name = parseString();
skipBlank();
if (!parseChar(':')) {
expected("':'");
}
skipBlank();
object.put(name, parseValue());
skipBlank();
} while (parseChar(','));
if (!parseChar('}')) {
expected("',' or '}'");
}
return object;
}
private Object parseNull() throws IOException {
read();
checkForChar('u');
checkForChar('l');
checkForChar('l');
return null;
}
private Object parseTrue() throws IOException {
read();
checkForChar('r');
checkForChar('u');
checkForChar('e');
return Boolean.TRUE;
}
private Object parseFalse() throws IOException {
read();
checkForChar('a');
checkForChar('l');
checkForChar('s');
checkForChar('e');
return Boolean.FALSE;
}
private void checkForChar(char ch) throws IOException {
if (!parseChar(ch)) {
expected("'" + ch + "'");
}
}
private String parseString() throws IOException {
read();
startCapture();
while (ch != '"') {
if (ch == '\\') {
pauseCapture();
parseEscaped();
startCapture();
} else if (ch < 0x20) {
expected("valid string character");
} else {
read();
}
}
String s = endCapture();
read();
return s;
}
private void parseEscaped() throws IOException {
read();
switch (ch) {
case '"':
case '/':
case '\\':
sb.append((char) ch);
break;
case 'b':
sb.append('\b');
break;
case 't':
sb.append('\t');
break;
case 'f':
sb.append('\f');
break;
case 'n':
sb.append('\n');
break;
case 'r':
sb.append('\r');
break;
case 'u':
char[] hex = new char[4];
for (int i = 0; i < 4; i++) {
read();
if (!isHexDigit()) {
expected("hexadecimal digit");
}
hex[i] = (char) ch;
}
sb.append((char) Integer.parseInt(String.valueOf(hex), 16));
break;
default:
expected("valid escape sequence");
}
read();
}
private Object parseNumber() throws IOException {
startCapture();
parseChar('-');
int firstDigit = ch;
if (!parseDigit()) {
expected("digit");
}
if (firstDigit != '0') {
while (parseDigit()) {}
}
parseFraction();
parseExponent();
return endCapture();
}
private boolean parseFraction() throws IOException {
if (!parseChar('.')) {
return false;
}
if (!parseDigit()) {
expected("digit");
}
while (parseDigit()) {}
return true;
}
private boolean parseExponent() throws IOException {
if (!parseChar('e') && !parseChar('E')) {
return false;
}
if (!parseChar('+')) {
parseChar('-');
}
if (!parseDigit()) {
expected("digit");
}
while (parseDigit()) {}
return true;
}
private boolean parseChar(char ch) throws IOException {
if (this.ch != ch) {
return false;
}
read();
return true;
}
private boolean parseDigit() throws IOException {
if (!isDigit()) {
return false;
}
read();
return true;
}
private void skipBlank() throws IOException {
while (isWhiteSpace()) {
read();
}
}
private void read() throws IOException {
if (ch == -1) {
throw new IOException("unexpected end of input");
}
if (index == fill) {
if (start != -1) {
sb.append(buf, start, fill - start);
start = 0;
}
fill = reader.read(buf, 0, buf.length);
index = 0;
if (fill == -1) {
ch = -1;
return;
}
}
ch = buf[index++];
}
private void startCapture() {
if (sb == null) {
sb = new StringBuilder();
}
start = index - 1;
}
private void pauseCapture() {
int end = ch == -1 ? index : index - 1;
sb.append(buf, start, end - start);
start = -1;
}
private String endCapture() {
int end = ch == -1 ? index : index - 1;
String captured;
if (sb.length() > 0) {
sb.append(buf, start, end - start);
captured = sb.toString();
sb.setLength(0);
} else {
captured = new String(buf, start, end - start);
}
start = -1;
return captured;
}
private boolean isWhiteSpace() {
return ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r';
}
private boolean isDigit() {
return ch >= '0' && ch <= '9';
}
private boolean isHexDigit() {
return ch >= '0' && ch <= '9' || ch >= 'a' && ch <= 'f' || ch >= 'A' && ch <= 'F';
}
private void expected(String expected) throws IOException {
if (ch == -1) {
throw new IOException("unexpected end of input");
}
throw new IOException("expected " + expected);
}
}
}
/** Represents a key/value pair in the configuration. */
@Plugin(name = "property", category = Node.CATEGORY, printObject = true)
public final class Property {
private static final Logger LOGGER = StatusLogger.getLogger();
private final String name;
private final String value;
private final boolean valueNeedsLookup;
private Property(final String name, final String value) {
this.name = name;
this.value = value;
this.valueNeedsLookup = value != null && value.contains("${");
}
/**
* Returns the property name.
*
* @return the property name.
*/
public String getName() {
return name;
}
/**
* Returns the property value.
*
* @return the value of the property.
*/
public String getValue() {
return Objects.toString(
value, Strings.EMPTY); // LOG4J2-1313 null would be same as Property not existing
}
/**
* Returns {@code true} if the value contains a substitutable property that requires a lookup to be resolved.
* @return {@code true} if the value contains {@code "${"}, {@code false} otherwise
*/
public boolean isValueNeedsLookup() {
return valueNeedsLookup;
}
/**
* Creates a Property.
*
* @param name The key.
* @param value The value.
* @return A Property.
*/
@PluginFactory
public static Property createProperty(
@PluginAttribute("name") final String name, @PluginValue("value") final String value) {
if (name == null) {
LOGGER.error("Property name cannot be null");
}
return new Property(name, value);
}
@Override
public String toString() {
return name + '=' + getValue();
}
}
/**
* AsyncLogger is a logger designed for high throughput and low latency logging. It does not perform
* any I/O in the calling (application) thread, but instead hands off the work to another thread as
* soon as possible. The actual logging is performed in the background thread. It uses the LMAX
* Disruptor library for inter-thread communication. (<a
* href="http://lmax-exchange.github.com/disruptor/"
* >http://lmax-exchange.github.com/disruptor/</a>)
*
* <p>To use AsyncLogger, specify the System property {@code
* -DLog4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector} before you
* obtain a Logger, and all Loggers returned by LogManager.getLogger will be AsyncLoggers.
*
* <p>Note that for performance reasons, this logger does not include source location by default.
* You need to specify {@code includeLocation="true"} in the configuration or any %class, %location
* or %line conversion patterns in your log4j.xml configuration will produce either a "?" character
* or no output at all.
*
* <p>For best performance, use AsyncLogger with the RandomAccessFileAppender or
* RollingRandomAccessFileAppender, with immediateFlush=false. These appenders have built-in support
* for the batching mechanism used by the Disruptor library, and they will flush to disk at the end
* of each batch. This means that even with immediateFlush=false, there will never be any items left
* in the buffer; all log events will all be written to disk in a very efficient manner.
*/
public class AsyncLogger extends Logger {
private static final long serialVersionUID = 1L;
private static final int SLEEP_MILLIS_BETWEEN_DRAIN_ATTEMPTS = 50;
private static final int MAX_DRAIN_ATTEMPTS_BEFORE_SHUTDOWN = 200;
private static final int RINGBUFFER_MIN_SIZE = 128;
private static final int RINGBUFFER_DEFAULT_SIZE = 256 * 1024;
private static final StatusLogger LOGGER = StatusLogger.getLogger();
private static final ThreadNameStrategy THREAD_NAME_STRATEGY = ThreadNameStrategy.create();
/** Strategy for deciding whether thread name should be cached or not. */
static enum ThreadNameStrategy { // LOG4J2-467
CACHED {
@Override
public String getThreadName(final Info info) {
return info.cachedThreadName;
}
},
UNCACHED {
@Override
public String getThreadName(final Info info) {
return Thread.currentThread().getName();
}
};
abstract String getThreadName(Info info);
static ThreadNameStrategy create() {
final String name =
PropertiesUtil.getProperties()
.getStringProperty("AsyncLogger.ThreadNameStrategy", CACHED.name());
try {
return ThreadNameStrategy.valueOf(name);
} catch (final Exception ex) {
LOGGER.debug(
"Using AsyncLogger.ThreadNameStrategy.CACHED: '{}' not valid: {}", name, ex.toString());
return CACHED;
}
}
}
private static volatile Disruptor<RingBufferLogEvent> disruptor;
private static final Clock CLOCK = ClockFactory.getClock();
private static volatile NanoClock nanoClock = new DummyNanoClock();
private static final ExecutorService EXECUTOR =
Executors.newSingleThreadExecutor(new DaemonThreadFactory("AsyncLogger-"));
static {
initInfoForExecutorThread();
LOGGER.debug("AsyncLogger.ThreadNameStrategy={}", THREAD_NAME_STRATEGY);
final int ringBufferSize = calculateRingBufferSize();
final WaitStrategy waitStrategy = createWaitStrategy();
disruptor =
new Disruptor<>(
RingBufferLogEvent.FACTORY, ringBufferSize, EXECUTOR, ProducerType.MULTI, waitStrategy);
disruptor.handleExceptionsWith(getExceptionHandler());
disruptor.handleEventsWith(new RingBufferLogEventHandler());
LOGGER.debug(
"Starting AsyncLogger disruptor with ringbuffer size {}...",
disruptor.getRingBuffer().getBufferSize());
disruptor.start();
}
/**
* Constructs an {@code AsyncLogger} with the specified context, name and message factory.
*
* @param context context of this logger
* @param name name of this logger
* @param messageFactory message factory of this logger
*/
public AsyncLogger(
final LoggerContext context, final String name, final MessageFactory messageFactory) {
super(context, name, messageFactory);
}
private static int calculateRingBufferSize() {
int ringBufferSize = RINGBUFFER_DEFAULT_SIZE;
final String userPreferredRBSize =
PropertiesUtil.getProperties()
.getStringProperty("AsyncLogger.RingBufferSize", String.valueOf(ringBufferSize));
try {
int size = Integer.parseInt(userPreferredRBSize);
if (size < RINGBUFFER_MIN_SIZE) {
size = RINGBUFFER_MIN_SIZE;
LOGGER.warn(
"Invalid RingBufferSize {}, using minimum size {}.",
userPreferredRBSize,
RINGBUFFER_MIN_SIZE);
}
ringBufferSize = size;
} catch (final Exception ex) {
LOGGER.warn(
"Invalid RingBufferSize {}, using default size {}.", userPreferredRBSize, ringBufferSize);
}
return Integers.ceilingNextPowerOfTwo(ringBufferSize);
}
/**
* Initialize an {@code Info} object that is threadlocal to the consumer/appender thread. This
* Info object uniquely has attribute {@code isAppenderThread} set to {@code true}. All other Info
* objects will have this attribute set to {@code false}. This allows us to detect Logger.log()
* calls initiated from the appender thread, which may cause deadlock when the RingBuffer is full.
* (LOG4J2-471)
*/
private static void initInfoForExecutorThread() {
EXECUTOR.submit(
new Runnable() {
@Override
public void run() {
final boolean isAppenderThread = true;
final Info info =
new Info(
new RingBufferLogEventTranslator(), //
Thread.currentThread().getName(),
isAppenderThread);
Info.THREADLOCAL.set(info);
}
});
}
private static WaitStrategy createWaitStrategy() {
final String strategy =
PropertiesUtil.getProperties().getStringProperty("AsyncLogger.WaitStrategy");
LOGGER.debug("property AsyncLogger.WaitStrategy={}", strategy);
if ("Sleep".equals(strategy)) {
return new SleepingWaitStrategy();
} else if ("Yield".equals(strategy)) {
return new YieldingWaitStrategy();
} else if ("Block".equals(strategy)) {
return new BlockingWaitStrategy();
}
LOGGER.debug("disruptor event handler uses BlockingWaitStrategy");
return new BlockingWaitStrategy();
}
private static ExceptionHandler<RingBufferLogEvent> getExceptionHandler() {
final String cls =
PropertiesUtil.getProperties().getStringProperty("AsyncLogger.ExceptionHandler");
if (cls == null) {
LOGGER.debug("No AsyncLogger.ExceptionHandler specified");
return null;
}
try {
@SuppressWarnings("unchecked")
final ExceptionHandler<RingBufferLogEvent> result =
Loader.newCheckedInstanceOf(cls, ExceptionHandler.class);
LOGGER.debug("AsyncLogger.ExceptionHandler={}", result);
return result;
} catch (final Exception ignored) {
LOGGER.debug("AsyncLogger.ExceptionHandler not set: error creating " + cls + ": ", ignored);
return null;
}
}
/** Tuple with the event translator and thread name for a thread. */
static class Info {
private static final ThreadLocal<Info> THREADLOCAL =
new ThreadLocal<Info>() {
@Override
protected Info initialValue() {
// by default, set isAppenderThread to false
return new Info(
new RingBufferLogEventTranslator(), Thread.currentThread().getName(), false);
}
};
private final RingBufferLogEventTranslator translator;
private final String cachedThreadName;
private final boolean isAppenderThread;
public Info(
final RingBufferLogEventTranslator translator,
final String threadName,
final boolean appenderThread) {
this.translator = translator;
this.cachedThreadName = threadName;
this.isAppenderThread = appenderThread;
}
// LOG4J2-467
private String threadName() {
return THREAD_NAME_STRATEGY.getThreadName(this);
}
}
@Override
public void logMessage(
final String fqcn,
final Level level,
final Marker marker,
final Message message,
final Throwable thrown) {
final Disruptor<RingBufferLogEvent> temp = disruptor;
if (temp == null) { // LOG4J2-639
LOGGER.fatal("Ignoring log event after log4j was shut down");
} else {
logMessage0(temp, fqcn, level, marker, message, thrown);
}
}
private void logMessage0(
final Disruptor<RingBufferLogEvent> theDisruptor,
final String fqcn,
final Level level,
final Marker marker,
final Message message,
final Throwable thrown) {
final Info info = Info.THREADLOCAL.get();
logMessageInAppropriateThread(info, theDisruptor, fqcn, level, marker, message, thrown);
}
private void logMessageInAppropriateThread(
final Info info,
final Disruptor<RingBufferLogEvent> theDisruptor,
final String fqcn,
final Level level,
final Marker marker,
final Message message,
final Throwable thrown) {
if (!logMessageInCurrentThread(info, theDisruptor, fqcn, level, marker, message, thrown)) {
logMessageInBackgroundThread(info, fqcn, level, marker, message, thrown);
}
}
/**
* LOG4J2-471: prevent deadlock when RingBuffer is full and object being logged calls Logger.log()
* from its toString() method
*
* @param info threadlocal information - used to determine if the current thread is the background
* appender thread
* @param theDisruptor used to check if the buffer is full
* @param fqcn fully qualified caller name
* @param level log level
* @param marker optional marker
* @param message log message
* @param thrown optional exception
* @return {@code true} if the event has been logged in the current thread, {@code false} if it
* should be passed to the background thread
*/
private boolean logMessageInCurrentThread(
Info info,
final Disruptor<RingBufferLogEvent> theDisruptor,
final String fqcn,
final Level level,
final Marker marker,
final Message message,
final Throwable thrown) {
if (info.isAppenderThread && theDisruptor.getRingBuffer().remainingCapacity() == 0) {
// bypass RingBuffer and invoke Appender directly
final ReliabilityStrategy strategy = privateConfig.loggerConfig.getReliabilityStrategy();
strategy.log(this, getName(), fqcn, marker, level, message, thrown);
return true;
}
return false;
}
/**
* Enqueues the specified message to be logged in the background thread.
*
* @param info holds some cached information
* @param fqcn fully qualified caller name
* @param level log level
* @param marker optional marker
* @param message log message
* @param thrown optional exception
*/
private void logMessageInBackgroundThread(
Info info,
final String fqcn,
final Level level,
final Marker marker,
final Message message,
final Throwable thrown) {
message.getFormattedMessage(); // LOG4J2-763: ask message to freeze parameters
initLogMessageInfo(info, fqcn, level, marker, message, thrown);
enqueueLogMessageInfo(info);
}
private void initLogMessageInfo(
Info info,
final String fqcn,
final Level level,
final Marker marker,
final Message message,
final Throwable thrown) {
info.translator.setValues(
this,
getName(),
marker,
fqcn,
level,
message, //
// don't construct ThrowableProxy until required
thrown, //
// config properties are taken care of in the EventHandler
// thread in the #actualAsyncLog method
// needs shallow copy to be fast (LOG4J2-154)
ThreadContext.getImmutableContext(), //
// needs shallow copy to be fast (LOG4J2-154)
ThreadContext.getImmutableStack(), //
// Thread.currentThread().getName(), //
// info.cachedThreadName, //
info.threadName(), //
// location: very expensive operation. LOG4J2-153:
// Only include if "includeLocation=true" is specified,
// exclude if not specified or if "false" was specified.
calcLocationIfRequested(fqcn),
// System.currentTimeMillis());
// CoarseCachedClock: 20% faster than system clock, 16ms gaps
// CachedClock: 10% faster than system clock, smaller gaps
// LOG4J2-744 avoid calling clock altogether if message has the timestamp
eventTimeMillis(message), //
nanoClock.nanoTime() //
);
}
private long eventTimeMillis(final Message message) {
return message instanceof TimestampMessage
? ((TimestampMessage) message).getTimestamp()
: CLOCK.currentTimeMillis();
}
/**
* Returns the caller location if requested, {@code null} otherwise.
*
* @param fqcn fully qualified caller name.
* @return the caller location if requested, {@code null} otherwise.
*/
private StackTraceElement calcLocationIfRequested(String fqcn) {
final boolean includeLocation = privateConfig.loggerConfig.isIncludeLocation();
return includeLocation ? location(fqcn) : null;
}
private void enqueueLogMessageInfo(Info info) {
// LOG4J2-639: catch NPE if disruptor field was set to null after our check above
try {
// Note: do NOT use the temp variable above!
// That could result in adding a log event to the disruptor after it was shut down,
// which could cause the publishEvent method to hang and never return.
disruptor.publishEvent(info.translator);
} catch (final NullPointerException npe) {
LOGGER.fatal("Ignoring log event after log4j was shut down.");
}
}
private static StackTraceElement location(final String fqcnOfLogger) {
return Log4jLogEvent.calcLocation(fqcnOfLogger);
}
/**
* This method is called by the EventHandler that processes the RingBufferLogEvent in a separate
* thread.
*
* @param event the event to log
*/
public void actualAsyncLog(final RingBufferLogEvent event) {
final Map<Property, Boolean> properties = privateConfig.loggerConfig.getProperties();
event.mergePropertiesIntoContextMap(properties, privateConfig.config.getStrSubstitutor());
final ReliabilityStrategy strategy = privateConfig.loggerConfig.getReliabilityStrategy();
strategy.log(this, event);
}
public static void stop() {
final Disruptor<RingBufferLogEvent> temp = disruptor;
// Must guarantee that publishing to the RingBuffer has stopped
// before we call disruptor.shutdown()
disruptor = null; // client code fails with NPE if log after stop = OK
if (temp == null) {
return; // stop() has already been called
}
// Calling Disruptor.shutdown() will wait until all enqueued events are fully processed,
// but this waiting happens in a busy-spin. To avoid (postpone) wasting CPU,
// we sleep in short chunks, up to 10 seconds, waiting for the ringbuffer to drain.
for (int i = 0; hasBacklog(temp) && i < MAX_DRAIN_ATTEMPTS_BEFORE_SHUTDOWN; i++) {
try {
Thread.sleep(SLEEP_MILLIS_BETWEEN_DRAIN_ATTEMPTS); // give up the CPU for a while
} catch (final InterruptedException e) { // ignored
}
}
temp.shutdown(); // busy-spins until all events currently in the disruptor have been processed
EXECUTOR.shutdown(); // finally, kill the processor thread
Info.THREADLOCAL.remove(); // LOG4J2-323
}
/** Returns {@code true} if the specified disruptor still has unprocessed events. */
private static boolean hasBacklog(final Disruptor<?> theDisruptor) {
final RingBuffer<?> ringBuffer = theDisruptor.getRingBuffer();
return !ringBuffer.hasAvailableCapacity(ringBuffer.getBufferSize());
}
/**
* Creates and returns a new {@code RingBufferAdmin} that instruments the ringbuffer of the {@code
* AsyncLogger}.
*
* @param contextName name of the global {@code AsyncLoggerContext}
* @return a new {@code RingBufferAdmin} that instruments the ringbuffer
*/
public static RingBufferAdmin createRingBufferAdmin(final String contextName) {
return RingBufferAdmin.forAsyncLogger(disruptor.getRingBuffer(), contextName);
}
/**
* Returns the {@code NanoClock} to use for creating the nanoTime timestamp of log events.
*
* @return the {@code NanoClock} to use for creating the nanoTime timestamp of log events
*/
public static NanoClock getNanoClock() {
return nanoClock;
}
/**
* Sets the {@code NanoClock} to use for creating the nanoTime timestamp of log events.
*
* <p>FOR INTERNAL USE. This method may be called with a different {@code NanoClock}
* implementation when the configuration changes.
*
* @param nanoClock the {@code NanoClock} to use for creating the nanoTime timestamp of log events
*/
public static void setNanoClock(NanoClock nanoClock) {
AsyncLogger.nanoClock = Objects.requireNonNull(nanoClock, "NanoClock must be non-null");
}
}
public class StoreConfiguration<T> {
protected static final StatusLogger LOGGER = StatusLogger.getLogger();
private String location;
private String password;
public StoreConfiguration(final String location, final String password) {
this.location = location;
this.password = password;
}
public String getLocation() {
return this.location;
}
public void setLocation(final String location) {
this.location = location;
}
public String getPassword() {
return this.password;
}
public char[] getPasswordAsCharArray() {
return this.password == null ? null : this.password.toCharArray();
}
public void setPassword(final String password) {
this.password = password;
}
/** @throws StoreConfigurationException May be thrown by subclasses */
protected T load() throws StoreConfigurationException {
return null;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((this.location == null) ? 0 : this.location.hashCode());
result = prime * result + ((this.password == null) ? 0 : this.password.hashCode());
return result;
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof StoreConfiguration)) {
return false;
}
final StoreConfiguration<?> other = (StoreConfiguration<?>) obj;
if (this.location == null) {
if (other.location != null) {
return false;
}
} else if (!this.location.equals(other.location)) {
return false;
}
if (this.password == null) {
if (other.password != null) {
return false;
}
} else if (!this.password.equals(other.password)) {
return false;
}
return true;
}
}