What is the “Execute Around” idiom?

Question

What is this \"Execute Around\" idiom (or similar) I\'ve been hearing about? Why might I use it, and why might I not want to use it?

Answer 1

If you want groovy idioms, here it is:

//-- the target class
class Resource { 
    def open () { // sensitive operation }
    def close () { // sensitive operation }
    //-- target method
    def doWork() { println "working";} }

//-- the execute around code
def static use (closure) {
    def res = new Resource();
    try { 
        res.open();
        closure(res)
    } finally {
        res.close();
    }
}

//-- using the code
Resource.use { res -> res.doWork(); }