Apache Ignite Quick Start Guide

Exploring the apply API

The compute grid's apply method receives a job argument and passes it to the closure at the time of execution. In the call or run methods, you can't pass any job argument. The apply method accepts two arguments: IgniteClosure<R,T> and argument<T>. In this section, we are going to create a closure to calculate the sum of a list of numbers. We'll pass a closure and a list of integers to the apply method. The following are the steps:

1. Create a new class, IgniteApply, and add the following lines:

      IgniteConfiguration cfg = new IgniteConfiguration();       cfg.setPeerClassLoadingEnabled(true);       try (Ignite ignite = Ignition.start(cfg)) {       IgniteCompute compute = ignite.compute(); List<Integer> numbersToAdd = Arrays.asList(2, 3, ...