Ratpacked: Get Time Taken To Fulfil Promise

The Promise class has a lot of methods. One of the methods is the time method. We can invoke this method an a Promise instance. The method creates a Duration object that we can use inside the method. The duration is the time taken from when the promise is subscribed to to when the result is available. The promise value is not changed, so we can add the time method at any position of a method chain for the Promise object.

In the following specification we check the duration for a Promise that is returned by the method generate of the class Numbers. For our example we wait for a number of seconds dependent on the argument of the generate method. In the specification we use the time method and check the time spent to fulfil the promise.

Written with Ratpack 1.4.5.

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About mrhaki

My name is Hubert A. Klein Ikkink also known as mrhaki. I work at the great IT company JDriven. Here I work on projects with Groovy & Grails, Gradle and Spring. At JDriven we focus on SpringSource technologies. All colleagues want to learn new technologies, support craftmanship and are very eager to learn. This is truly a great environment to work in. You can contact me via Google+ or @mrhaki.

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