SampleAsyncCallInSequence - Supplier Lambda Example Code

SampleAsyncCallInSequence.java

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);