Open Source Logging Tools in Java - Pencil

\"Pencil\" is a log-message-compiler for java (keyword: generative programming). It takes bytecode produced by javac (or another java-compiler), transforms it and enriches it with real logging expressions. The main goal of the \"Pencil\" project is to provide a mechanism to make logging easy, safe and fast. To achieve this result, \"Pencil\" uses its own expression language developed with the ANTLR parser-generator. Features: * The Pencil log statements are more readable than usual log instructions. * Java source files with Pencil statements are shorter the java files with usual logging. * Pencils way to log forbids errors during the log process (no NullPointerExceptions, no unmeant business logic). * Pencil is based on commons logging. so yuo can use your favorite logging framework to log. * The modified bytecode is automaticaly enriched with isDebugEnabled() calls, to make the logging fast.