Orchestration.java

// Orchestration based on setHandler
private void method1() {
	// Create first step
	Future<String> future1 = readFile();

	// Set handler on future1
	future1.setHandler(res1 -> {
		if (res1.succeeded()) {
			Future<String> future2 = writeFile(res1.result());

			// Set handler on future 2
			future2.setHandler(res2 -> {
				if (res2.succeeded()) {
					Future<String> future3 = copyFile(res2.result());

					// Set handler on future 3
					future3.setHandler(res3 -> {
						if (res3.succeeded()) {
							System.out.println(res3.result());
						} else {
							// Manage doSmthg3 errors
						}
					});
				} else {
					// Manage doSmthg2 errors
				}
			});
		} else {
			// Manage doSmthg1 errors
		}
	});
}