Abstracting Scripts: Template Method Pattern

gistfile1.java

abstract class AbstractScriptTemplate {

    // Template Method Pattern
    public final void runScript() {
        setup();
        scriptLogic();
        clean();
        report();
    }

    // Methods to implement
    public abstract void setup();
    public abstract void scriptLogic();
    public abstract void clean();

    // Hooks
    public void report() {
        System.out.println("Default report implementation");
    }

}

class FileMoveScript extends AbstractScriptTemplate {

    public void setup() {
        // do something
    }

    public void scriptLogic() {
        // business logic for the task
    }

    public void clean() {
        // clean up intermediate files, etc
    }

}

class ProductPricingScript extends AbstractScriptTemplate {

    long startTime;
    long endTime;

    public void setup() {
        // do something
    }

    public void scriptLogic() {
        startTime = System.nanoTime();
        // business logic for the task
    }

    public void clean() {
        // clean up intermediate files, etc
    }

    @Override
    public void report() {
        int seconds = (startTime - endTime) / 1000000000.0
        System.out.println("Report finished in " + seconds + " seconds");
    }

}