[英]Working with AWS Workflows: Waiting for a promise to finish before executing a function.
我試圖熟悉AWS工作流和承諾。 我有一個清單:
List<Promise<ClassA>> classA= someSet.stream()
.filter()
.map(/*Insert call activity*/)
.collect(Collectors.toList());
Promise<Void> waitForPromises = new AndPromise(
doSomething(classA),
.
.Some other functions);
facts = /*do Some processing*/
Promise<ClassB<EnumA>> actions = ActivityB.evaluate(facts, waitForPromises);
performActions(actions, facts, classA);
評估功能:
evaluate(Facts facts, Promise<?>... waitFor)
現在,如果我不修改classA中的值,則可以使performActions的定義如下: performActions(Promise<ClassB<EnumA>> actions, Facts facts, @Wait List<Promise<ClassA>> classA)
;
但是,現在我需要確保在執行performActions之前,由於doSomething
執行的操作, classA
具有更新的值。
這行得通嗎?
List<Promise<ClassA>> classA= someSet.stream()
.filter()
.map(/*Insert call activity*/)
.collect(Collectors.toList());
Promise<List<ClassA>> somethingP = doSomething(classA)
Promise<Void> waitForPromises = new AndPromise(
somethingP,
.
.Some other functions);
facts = /*do Some processing*/
Promise<ClassB<EnumA>> actions = ActivityB.evaluate(facts, waitForPromises);
performActions(actions, facts, somethingP);
perfomActions的簽名是:
performActions(Promise<ClassB<EnumA>> actions, Facts facts,
Promise<List<ClassA>> somethingP);
編輯:更新了doSomething以返回Promise <List <ClassA >>
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