fromdev

MyClass myobject = new MyClass();

CompletableFuture<Data> dataCompletableFuture = CompletableFuture.supplyAsync(() -> myobject.getData()); // this is async call with supplier Lambda

Data dataObject = dataCompletableFuture.get(); // this is a blocking call

fromdev

  MyClass myobject = new MyClass();
  Data dataObject1 = myobject.getData1();
  Data dataObject2 = myobject.getData2();
  Data dataObject3 = myobject.getData3();
  Aggregator aggregator = new Aggregator();
  Data someDataCombined = aggregator.combine(dataObject1, dataObject2); // combines data of 2 objects
  Data someDataCombined2 = aggregator.combine(someDataCombined, dataObject3); // combines data of 2 objects

fromdev

  public class Aggregator {
    public combine(Data data1, Data data2) {
      //some magic for aggregating data
    }

  }

fromdev

MyClass myobject = new MyClass();

  CompletableFuture<Data> dataCompletableFuture1 = CompletableFuture.supplyAsync(() -> myobject.getData1()); // first Async call
  CompletableFuture<Data> dataCompletableFuture2 = CompletableFuture.supplyAsync(() -> myobject.getData2()); // second Async call
  CompletableFuture<Data> dataCompletableFuture3 = CompletableFuture.supplyAsync(() -> myobject.getData3()); // third Async call

  //Now the code to combine in sequence
  dataCompletableFuture1
    .thenCombine(dataCompletableFuture2, Aggregator::combine)
    .thenCombine(dataCompletableFuture3, Aggregator::combine);

fromdev

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