commons-javaflow.jar contains an Ant task implementation that
instruments class files for javaflow. To use this task in your
build script, first declare it as follows:  <taskdef
name="javaflow"   The javaflow task forms an implicit FileSet
and supports all attributes of <fileset> (dir becomes srcdir) as
well as the nested <include>, <exclude> and <patternset>
elements.  Parameter attributes  Attribute Description Required?
srcdir directory from which the instrumented class files will be
read. This is used as the base directory for the implicit
FileSet that the javaflow task forms. yes dstdir directory to
which the instrumented class files will be placed. This can be
the same directory as the source directory. yes  When
srcdir==dstdir, class files are touched only when they are not
yet instrumented.   <javaflow srcdir="build/classes"
dstdir="build/classes">  Instrument all the class files in the
build/classes directory in-place.