OC-Example.md

无需强引用 自引用内存管理 只要保证每一个element 链路完整向下传递或打断即可 promise.xxx()

PrioritySessionElement<NSNumber *, NSString *> *headElement = [self customSession];
PrioritySessionElement *normalAsyncElement = [self normalAsyncElement];
PrioritySessionElement *testElement = [[PromisePriority(NSString *, id) {
	promise.next(@"11000");// promise.brake(error);
} identifier:@"testElement"] dispose:^{ ... }];

headElement
	.then(normalAsyncElement)
	.then(testElement)
	.then(self.loopValidatedElement)
	.then(self.conditionDelayElement)
	.then(self.validatedElement);
///
[headElement executeWithData:@(-2)];

• 常规校验操作 Element （if else 嵌套）

- (PrioritySessionElement *)validatedElement {
    return [[[[PromisePriority(NSString *, NSNumber *){
        promise.output = @10086;
        promise.validated(isValid);
    } identifier:@"validatedElement"] subscribe:^(NSNumber * _Nullable value) {
        NSLog(@"validatedElement subscribe data = %@", value);
    }] catch:^(NSError * _Nullable error) { ... }] dispose:^{ ...}];

• 状态延迟校验Element

- (PrioritySessionElement *)conditionDelayElement {
    return [[[[PromisePriority(NSNumber *, NSString *) {
        promise.output = @"10098";
        promise.conditionDelay(conditionIsOK, 3.f);
    } identifier:@"conditionDelayElement"]];
}

• 循环延迟校验Element（轮询）

- (PrioritySessionElement *)loopValidatedElement {
    return [PromisePriority(NSString *, NSNumber *) {
        promise.output = @(1);
        promise.loopValidated(isValid, 1.f);
    }];
}

• 常规异步Element

- (PrioritySessionElement *)normalAsyncElement {
    return [PromisePriority(NSNumber *, NSString *) {...}];
}

• 自定义实现Element

- (PrioritySessionElement *)customSession {
    return [PrioritySessionCustomElement new];
}