GWT 2.12 deprecations/removals

[niloc132]

This issue will discuss unused classes to deprecate and remove in 2.12 - if you have questions, or need to find another way to do something, please discuss here.

Removal - types that have been deprecated and are not typically part of the public API:

• com.google.gwt.dev.util.arg.ArgHandlerLibraries - no longer used as of GWT 2.8.
• com.google.gwt.dev.util.arg.ArgHandlerLink - no longer used as of GWT 2.8.
• com.google.gwt.dev.util.arg.ArgHandlerOutputLibrary - no longer used as of GWT 2.8.
• com.google.gwt.dev.shell.HostedModeServletConfigProxy - last used by GWTShellServlet, removed as of GWT 2.6. This wasn't deprecated, but was package-protected.
• com.google.gwt.dev.shell.rewrite.ForceClassVersion15 - used when running legacy dev mode with Java <1.8.
• com.google.gwt.dev.util.arg.ArgHandlerStrictResources - logged deprecation warnings when used, has had no effect since before 2.8.
• com.google.gwt.dev.util.arg.ArgHandlerOverlappingSourceWarnings - logged deprecation warnings when used, has had no effect since before 2.8.
• com.google.gwt.dev.util.arg.ArgHandlerMissingDepsFile - logged deprecation warnings when used, has had no effect since before 2.8.
• com.google.gwt.dev.util.arg.ArgHandlerIncrementalCompileWarnings - logged deprecation warnings when used, has had no effect since before 2.8.
• com.google.gwt.dev.util.arg.ArgHandlerDeprecatedDisableUpdateCheck - logged deprecation warnings when used, has had no effect since before 2.9.

Deprecation, to be removed in a future release - these are not currently used by GWT itself (and have not been for some time), and will be removed in the future:

• com.google.gwt.dev.GetJreEmulation - runnable main that appears to list jre emulation, like the JavaEmulSummaryDoclet (formerly ezt doclet).
  • com.google.gwt.dev.SignatureDumper - package-protected class used in GetJreEmulation.
• com.google.gwt.dev.RunWebApp - runnable main that appears to run the JettyLauncher (deprecated in GWT 2.11), without the rest of dev mode.
• com.google.gwt.dev.shell.log.ServletContextTreeLogger - like HostedModeServletConfigProxy, this was part of GWTShellServlet, but wasn't removed. This was public, so leaving it for another release.
• com.google.gwt.dev.shell.WorkDirs - Was used in GWTShell, also removed in GWT 2.6. This was public, leaving it for another release.

[niloc132]

• Finish removing deprecated SynchronousFragmentLoadCallback #9921 should be added to this

[niloc132]

• Also com.google.web.bindery.requestfactory.server.RequestFactoryJarExtractor, which is currently shipped in several jars, but really should only be part of the build. No intent to delete this class, but just stop shipping it.

[niloc132]

• com.google.gwt.user.tools.util.CreatorUtilities only has one method used - was previously created for ApplicationCreator, which was rewritten as WebAppCreator
• com.google.gwt.user.tools.ApplicationCreator now just logs an error, points the user at WebAppCreator.
• com.google.gwt.user.tools.ProjectCreator now just logs an error, points the user at WebAppCreator.
• com.google.gwt.user.tools.util.ArgHandlerAddToClassPath is unused, formerly used by ApplicationCreator

[niloc132]

Speedtracer classes - the speedtracer tools no longer run as far as we can tell, so we'll intend to remove these in the future and replace with some other metrics - consider jdk.jfr.Event apis or the like? See #10007 for later followup.

• com.google.gwt.dev.util.log.speedtracer.SpeedTracerLogger
• com.google.gwt.dev.util.log.speedtracer.SpeedTracerEventType
• com.google.gwt.dev.util.log.speedtracer.CompilerEventType
• com.google.gwt.dev.util.log.speedtracer.DevModeEventType

May also want to consider removing com.google.gwt.dev.util.log.MetricName/com.google.gwt.dev.util.log.MetricMap, an enum with only one value, and add special cased logging for this purpose.