I am also baffled as to what this "change" operation is meant to suggest. Enlisting possibly-unrelated operations in a common transaction is a good tool to hav

I am also baffled as to what this "change" operation is meant to suggest. Enlisting possibly-unrelated operations in a common transaction is a good tool to have in the toolbox, although it is a tad hairy to bake that into each method signature. Spring's TransactionTemplate presents an alternate approach.