gwt-log - Runtime logging for your Google Web Toolkit projects.

by Fred Sauer

Key Features:

• Client logging code is compiled out and introduces zero-overhead^* due to GWT 1.5 compiler dead code elimination when log_level=OFF
• Serializable classes (domain objects, POJOs, etc.) can utilize the same logging code on client and server via inclusion of a single, common, gwt-log jar on both tiers
• Server side logging for mobile devices such as the iPhone
• Server side logging automatically detects Apache log4j, falling back to JDK 1.4 logging
• Remote logging option, which send copies of all client log messages to the server
• Seven out of the box log levels (TRACE, DEBUG, INFO, WARN, ERROR, FATAL, OFF)
• Log level can be controlled via log_level URL parameter, GWT meta tag in your HTML, or in your module *.gwt.xml file
• Wide variety of context sensitive log destinations: draggable popup DIV, Firebug, console.log(), GWT.log(), System.err()/System.out(), remote (server) logging
• Ability to independently control compile time and runtime log levels
• Out of the box UncaughtExceptionHandler via Log.setUncaughtExceptionHandler()
• Works seemlessly with Google App Engine for both client and server side logging

^{* Unless your logging parameters are determined by the GWT compiler to have side effects}