ExecutorServiceの拡張がうまくできん - こっちならできた … 名前空間の問題？

console.log

in Closure 1
in Closure 2
in Closure 3
in Closure 4
in Closure 5
in Closure 6
in Closure 7
in Closure 8
in Closure 9
in Closure 10
result -> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

executor_submit.groovy

import java.util.concurrent.ExecutorService
import java.util.concurrent.Callable
import java.util.concurrent.Executors

ExecutorService.metaClass.define {
    doCall = {Closure closure ->
        return delegate.submit (new Callable(){
            @Override
            Object call() {
                return closure ()
            }
        })
    }
}

def executor = Executors.newSingleThreadExecutor()
def future = executor.doCall {
    def list = []
    (1..10).each {
        println "in Closure ${it}"
        list << it
    }
    return list
}

println "result -> ${future.get()}"