There is a test case that covers this scenario:
http://fisheye.jboss.org/browse/JBPM/jbpm.3/jpdl/jar/src/test/java/org/jbpm/context/exe/VariableScopingTest.java?r=1.1
Looking at testScopeOverriding(), this works properly if the
createVariable(String name, Object value, Token token) is used.
The results are different if setVariable(String name, Object value, Token
token) is used, which is also documented in the javadocs:
/**
| * sets a variable. If a variable exists in the scope given by the token,
that
| * variable is updated. Otherwise, the variable is created on the root
token
| * (=process instance scope).
| */
| public void setVariable(String name, Object value, Token token) {
In order to use setVariable on different tokens, the variables have to be
created first with createVariable, otherwise they will all end up being
referenced by the root token.
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