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Apache Log4j Core 2.3.2 API

Core API 
Package Description
org.apache.logging.log4j.core
Implementation of Log4j 2.
Configuration 
Package Description
org.apache.logging.log4j.core.config
Configuration of Log4j 2.
org.apache.logging.log4j.core.config.json
Classes and interfaces supporting configuration of Log4j 2 with JSON.
org.apache.logging.log4j.core.config.plugins
Annotations for Log4j 2 plugins.
org.apache.logging.log4j.core.config.plugins.convert
TypeConverter plugins for converter strings into various types.
org.apache.logging.log4j.core.config.plugins.processor
Java annotation processor for pre-scanning Log4j 2 plugins.
org.apache.logging.log4j.core.config.plugins.util
Utility and manager classes for Log4j 2 plugins.
org.apache.logging.log4j.core.config.plugins.validation
Constraint validators for plugin factory methods.
org.apache.logging.log4j.core.config.plugins.validation.constraints
Validation annotations.
org.apache.logging.log4j.core.config.plugins.validation.validators
ConstraintValidator implementations for the constraint annotations.
org.apache.logging.log4j.core.config.plugins.visitors
Visitor classes for extracting values from a Configuration or Node corresponding to a plugin annotation.
org.apache.logging.log4j.core.config.status
Configuration classes for the StatusLogger API.
org.apache.logging.log4j.core.config.xml
Classes and interfaces supporting configuration of Log4j 2 with XML.
org.apache.logging.log4j.core.config.yaml
Classes and interfaces supporting configuration of Log4j 2 with YAML.
org.apache.logging.log4j.core.selector
Log4j 2 Context Selectors.
Core Plugins 
Package Description
org.apache.logging.log4j.core.appender
Log4j 2 Appenders.
org.apache.logging.log4j.core.appender.db
The classes in this package and sub packages provide appenders for various types of databases and methods for accessing databases.
org.apache.logging.log4j.core.appender.db.jdbc
The JDBC Appender supports writing log events to a relational database using standard JDBC connections.
org.apache.logging.log4j.core.appender.db.jpa
The JPA Appender supports writing log events to a relational database using the Java Persistence API.
org.apache.logging.log4j.core.appender.db.jpa.converter
The converters in this package implement the JPA 2.1 mechanism for converting non-standard types to and from database fields.
org.apache.logging.log4j.core.appender.mom
Message oriented middleware appenders.
org.apache.logging.log4j.core.appender.rewrite
Apache Flume Appender.
org.apache.logging.log4j.core.appender.rolling
Rolling File Appender and support classes.
org.apache.logging.log4j.core.appender.rolling.action
Support classes for the Rolling File Appender.
org.apache.logging.log4j.core.appender.routing
Apache Flume Appender.
org.apache.logging.log4j.core.filter
Log4j 2 Filter support.
org.apache.logging.log4j.core.layout
Log4j 2 Layout support.
org.apache.logging.log4j.core.lookup
Log4j 2 Lookups.
org.apache.logging.log4j.core.pattern
Provides classes implementing format specifiers in conversion patterns.
Tools 
Package Description
org.apache.logging.log4j.core.net
Log4j 2 network support.
org.apache.logging.log4j.core.net.mom.jms
Supporting network code for JMS appenders.
org.apache.logging.log4j.core.net.server
Standalone server classes for consuming log events over a network.
org.apache.logging.log4j.core.net.ssl
Log4j 2 SSL support
org.apache.logging.log4j.core.tools
Log4j 2 command line tools.
Internals 
Package Description
org.apache.logging.log4j.core.async
Provides Asynchronous Logger classes and interfaces for low-latency logging.
org.apache.logging.log4j.core.impl
Log4j 2 private implementation classes.
org.apache.logging.log4j.core.jackson
Classes and interfaces for serializing and deserializing Log4j 2 log events to XML and JSON using the Jackson library.
org.apache.logging.log4j.core.jmx
Log4j 2 JMX support.
org.apache.logging.log4j.core.osgi
Collection of OSGi-specific classes for bundles.
org.apache.logging.log4j.core.util
Log4j 2 helper classes.
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