Package org.apache.logging.log4j.core.util

Interface Builder<T>

Type Parameters:

T - This builder creates instances of this class.

All Known Subinterfaces:

AppenderComponentBuilder, AppenderRefComponentBuilder, ComponentBuilder<T>, CompositeFilterComponentBuilder, ConfigurationBuilder<T>, CustomLevelComponentBuilder, FilterableComponentBuilder<T>, FilterComponentBuilder, KeyValuePairComponentBuilder, LayoutComponentBuilder, LoggableComponentBuilder<T>, LoggerComponentBuilder, PropertyComponentBuilder, RootLoggerComponentBuilder, ScriptComponentBuilder, ScriptFileComponentBuilder

All Known Implementing Classes:

AppenderSet.Builder, AsyncAppender.Builder, AsyncLoggerConfig.Builder, AsyncLoggerConfig.RootLogger.Builder, AsyncWaitStrategyFactoryConfig.Builder, BurstFilter.Builder, ClassArbiter.Builder, ColumnConfig.Builder, ColumnMapping.Builder, ConsoleAppender.Builder, DefaultArbiter.Builder, DefaultConfigurationBuilder, DefaultRolloverStrategy.Builder, DenyAllFilter.Builder, DirectWriteRolloverStrategy.Builder, DriverManagerConnectionSource.Builder, EnvironmentArbiter.Builder, FileAppender.Builder, GelfLayout.Builder, HtmlLayout.Builder, HttpAppender.Builder, IfLastModified.Builder, JdbcAppender.Builder, JmsAppender.Builder, JsonLayout.Builder, KafkaAppender.Builder, KeyValuePair.Builder, LevelMatchFilter.Builder, LevelPatternSelector.Builder, Log4jLogEvent.Builder, LoggerConfig.Builder, LoggerConfig.RootLogger.Builder, MarkerPatternSelector.Builder, MemoryMappedFileAppender.Builder, MimeMessageBuilder, MonitorResource.Builder, MutableThreadContextMapFilter.Builder, NoMarkerFilter.Builder, NoSqlAppender.Builder, OutputStreamAppender.Builder, PatternLayout.Builder, PatternLayout.SerializerBuilder, PatternMatch.Builder, PluginBuilder, PosixViewAttributeAction.Builder, PropertiesConfigurationBuilder, RandomAccessFileAppender.Builder, Rfc5424Layout.Rfc5424LayoutBuilder, RollingFileAppender.Builder, RollingRandomAccessFileAppender.Builder, Routes.Builder, RoutingAppender.Builder, ScriptAppenderSelector.Builder, ScriptArbiter.Builder, ScriptPatternSelector.Builder, SelectArbiter.Builder, SmtpAppender.Builder, SocketAddress.Builder, SocketAppender.Builder, SocketOptions, SocketPerformancePreferences, StringMatchFilter.Builder, SyslogAppender.Builder, SyslogLayout.Builder, SystemPropertyArbiter.Builder, TimeBasedTriggeringPolicy.Builder, WriterAppender.Builder, XmlLayout.Builder, YamlLayout.Builder

public interface Builder<T>

A type of builder that can be used to configure and create a instances using a Java DSL instead of through a configuration file. These builders are primarily useful for internal code and unit tests, but they can technically be used as a verbose alternative to configuration files.

When creating plugin builders, it is customary to create the builder class as a public static inner class called Builder. For instance, the builder class for PatternLayout would be PatternLayout.Builder.

Method Summary

Modifier and Type	Method	Description
T	build()	Builds the object after all configuration has been set.
default String	getErrorPrefix()	Prefix to use to report errors from this builder.
default boolean	isValid()

Method Details

build

T build()

Builds the object after all configuration has been set. This will use default values for any unspecified attributes for the object.

Returns:

the configured instance.

Throws:

ConfigurationException - if there was an error building the object.

isValid

default boolean isValid()

getErrorPrefix

default String getErrorPrefix()

Prefix to use to report errors from this builder.

Returns:

The prefix of all logged errors.