Add support for Log4j 1 configuration formats#145
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Adds an API to perform automatic conversions between different logging configuration file formats and a basic implementation. The implementation supports the following configuration file formats: - Log4j Core 2 XML, - Log4j Core 2 JSON, - Log4j Core 2 YAML, - Log4j Core 2 Properties (read-only), - Log4j Core 3 Properties. The API is extensible through `ServiceLoader` and allows integrators to provide support for additional configuration file formats. Read-only support for the Log4j 1 Properties and Log4j 1 XML configuration formats will be provided in a separate PR. **Note**: Currently the API is only accessible from Java code. Its main purpose is to provide a "Migrate Log4j 1.x to Log4j Core 2.x", a "Migrate Logback to Log4j Core 2.x" and a "Migrate JUL to Log4j Core 2.x" [OpenRewrite recipe](https://docs.openrewrite.org/recipes/java/logging/log4j). A `picocli`-based `log4j-transform-cli` tool to access all the goodies in this repository, will be provided later. Closes apache/logging-log4j2#2080
This adds support for Log4j 1 configuration formats. Since Log4j Core 2 is a complete rewrite for Log4j 1, the converter: - Needs to know exactly what configuration parameters a Log4j 1 component supports to create an equivalent Log4j Core 2 configuration. - Introduces a pluggable `spi/v1/Log4j1ComponentParser` interface. For each supported Log4j 1 component, an implementation of this interface must be provided and registered with `ServiceLoader`. The following Log4j 1 components are currently supported: - Appenders: `ConsoleAppender`, `DailyRollingFileAppender`, `FileAppender` and `RollingFileAppender`. - Filters: `DenyAllFilter`, `LevelMatchFilter`, `LevelRangeFilter` and `StringMatchFilter`. - Layouts: `HTMLLayout`, `PatternLayout`, `SimpleLayout`, `TTCCLayout`. Part of apache/logging-log4j2#3220
…erter # Conflicts: # log4j-converter-config/pom.xml # log4j-converter-config/src/main/java/org/apache/logging/converter/config/ConfigurationConverter.java # log4j-converter-config/src/main/java/org/apache/logging/converter/config/internal/ComponentUtils.java # log4j-converter-config/src/main/java/org/apache/logging/converter/config/internal/DefaultConfigurationConverter.java # log4j-converter-config/src/main/java/org/apache/logging/converter/config/internal/XmlUtils.java # log4j-converter-config/src/main/java/org/apache/logging/converter/config/internal/v2/AbstractJacksonConfigurationMapper.java # log4j-converter-config/src/main/java/org/apache/logging/converter/config/internal/v2/PropertiesV2ConfigurationParser.java # log4j-converter-config/src/main/java/org/apache/logging/converter/config/internal/v2/XmlConfigurationMapper.java # log4j-converter-config/src/test/java/org/apache/logging/converter/config/ConfigurationConverterTest.java # log4j-converter-config/src/test/java/org/apache/logging/converter/config/internal/AbstractConfigurationMapperTest.java
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This adds support for Log4j 1 configuration formats. Since Log4j Core 2 is a complete rewrite for Log4j 1, the converter:
spi/v1/Log4j1ComponentParserinterface. For each supported Log4j 1 component, an implementation of this interface must be provided and registered withServiceLoader.The following Log4j 1 components are currently supported:
ConsoleAppender,DailyRollingFileAppender,FileAppenderandRollingFileAppender.DenyAllFilter,LevelMatchFilter,LevelRangeFilterandStringMatchFilter.HTMLLayout,PatternLayout,SimpleLayout,TTCCLayout.Part of apache/logging-log4j2#3220