166 lines
8.6 KiB
C
166 lines
8.6 KiB
C
|
/**
|
||
|
|
Copyright 2018 Google Inc. All rights reserved.
|
||
|
|
|
||
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
you may not use this file except in compliance with the License.
|
||
|
|
You may obtain a copy of the License at:
|
||
|
|
|
||
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, software
|
||
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
See the License for the specific language governing permissions and
|
||
|
|
limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#import "FBLPromise.h"
|
||
|
|
|
||
|
|
NS_ASSUME_NONNULL_BEGIN
|
||
|
|
|
||
|
|
/** The default number of retry attempts is 1. */
|
||
|
|
FOUNDATION_EXTERN NSInteger const FBLPromiseRetryDefaultAttemptsCount NS_REFINED_FOR_SWIFT;
|
||
|
|
|
||
|
|
/** The default delay interval before making a retry attempt is 1.0 second. */
|
||
|
|
FOUNDATION_EXTERN NSTimeInterval const FBLPromiseRetryDefaultDelayInterval NS_REFINED_FOR_SWIFT;
|
||
|
|
|
||
|
|
@interface FBLPromise<Value>(RetryAdditions)
|
||
|
|
|
||
|
|
typedef id __nullable (^FBLPromiseRetryWorkBlock)(void) NS_SWIFT_UNAVAILABLE("");
|
||
|
|
typedef BOOL (^FBLPromiseRetryPredicateBlock)(NSInteger, NSError *) NS_SWIFT_UNAVAILABLE("");
|
||
|
|
|
||
|
|
/**
|
||
|
|
Creates a pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, which executes asynchronously, or rejects with the same error after all retry attempts have
|
||
|
|
been exhausted. Defaults to `FBLPromiseRetryDefaultAttemptsCount` attempt(s) on rejection where the
|
||
|
|
`work` block is retried after a delay of `FBLPromiseRetryDefaultDelayInterval` second(s).
|
||
|
|
|
||
|
|
@param work A block that executes asynchronously on the default queue and returns a value or an
|
||
|
|
error used to resolve the promise.
|
||
|
|
@return A new pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, or rejects with the same error after all retry attempts have been exhausted.
|
||
|
|
*/
|
||
|
|
+ (FBLPromise *)retry:(FBLPromiseRetryWorkBlock)work NS_SWIFT_UNAVAILABLE("");
|
||
|
|
|
||
|
|
/**
|
||
|
|
Creates a pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, which executes asynchronously on the given `queue`, or rejects with the same error after all
|
||
|
|
retry attempts have been exhausted. Defaults to `FBLPromiseRetryDefaultAttemptsCount` attempt(s) on
|
||
|
|
rejection where the `work` block is retried on the given `queue` after a delay of
|
||
|
|
`FBLPromiseRetryDefaultDelayInterval` second(s).
|
||
|
|
|
||
|
|
@param queue A queue to invoke the `work` block on.
|
||
|
|
@param work A block that executes asynchronously on the given `queue` and returns a value or an
|
||
|
|
error used to resolve the promise.
|
||
|
|
@return A new pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, or rejects with the same error after all retry attempts have been exhausted.
|
||
|
|
*/
|
||
|
|
+ (FBLPromise *)onQueue:(dispatch_queue_t)queue
|
||
|
|
retry:(FBLPromiseRetryWorkBlock)work NS_SWIFT_UNAVAILABLE("");
|
||
|
|
|
||
|
|
/**
|
||
|
|
Creates a pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, which executes asynchronously, or rejects with the same error after all retry attempts have
|
||
|
|
been exhausted.
|
||
|
|
|
||
|
|
@param count Max number of retry attempts. The `work` block will be executed once if the specified
|
||
|
|
count is less than or equal to zero.
|
||
|
|
@param work A block that executes asynchronously on the default queue and returns a value or an
|
||
|
|
error used to resolve the promise.
|
||
|
|
@return A new pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, or rejects with the same error after all retry attempts have been exhausted.
|
||
|
|
*/
|
||
|
|
+ (FBLPromise *)attempts:(NSInteger)count
|
||
|
|
retry:(FBLPromiseRetryWorkBlock)work NS_SWIFT_UNAVAILABLE("");
|
||
|
|
|
||
|
|
/**
|
||
|
|
Creates a pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, which executes asynchronously on the given `queue`, or rejects with the same error after all
|
||
|
|
retry attempts have been exhausted.
|
||
|
|
|
||
|
|
@param queue A queue to invoke the `work` block on.
|
||
|
|
@param count Max number of retry attempts. The `work` block will be executed once if the specified
|
||
|
|
count is less than or equal to zero.
|
||
|
|
@param work A block that executes asynchronously on the given `queue` and returns a value or an
|
||
|
|
error used to resolve the promise.
|
||
|
|
@return A new pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, or rejects with the same error after all retry attempts have been exhausted.
|
||
|
|
*/
|
||
|
|
+ (FBLPromise *)onQueue:(dispatch_queue_t)queue
|
||
|
|
attempts:(NSInteger)count
|
||
|
|
retry:(FBLPromiseRetryWorkBlock)work NS_SWIFT_UNAVAILABLE("");
|
||
|
|
|
||
|
|
/**
|
||
|
|
Creates a pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, which executes asynchronously, or rejects with the same error after all retry attempts have
|
||
|
|
been exhausted. On rejection, the `work` block is retried after the given delay `interval` and will
|
||
|
|
continue to retry until the number of specified attempts have been exhausted or will bail early if
|
||
|
|
the given condition is not met.
|
||
|
|
|
||
|
|
@param count Max number of retry attempts. The `work` block will be executed once if the specified
|
||
|
|
count is less than or equal to zero.
|
||
|
|
@param interval Time to wait before the next retry attempt.
|
||
|
|
@param predicate Condition to check before the next retry attempt. The predicate block provides the
|
||
|
|
the number of remaining retry attempts and the error that the promise was rejected
|
||
|
|
with.
|
||
|
|
@param work A block that executes asynchronously on the default queue and returns a value or an
|
||
|
|
error used to resolve the promise.
|
||
|
|
@return A new pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, or rejects with the same error after all retry attempts have been exhausted or if
|
||
|
|
the given condition is not met.
|
||
|
|
*/
|
||
|
|
+ (FBLPromise *)attempts:(NSInteger)count
|
||
|
|
delay:(NSTimeInterval)interval
|
||
|
|
condition:(nullable FBLPromiseRetryPredicateBlock)predicate
|
||
|
|
retry:(FBLPromiseRetryWorkBlock)work NS_SWIFT_UNAVAILABLE("");
|
||
|
|
|
||
|
|
/**
|
||
|
|
Creates a pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, which executes asynchronously on the given `queue`, or rejects with the same error after all
|
||
|
|
retry attempts have been exhausted. On rejection, the `work` block is retried after the given
|
||
|
|
delay `interval` and will continue to retry until the number of specified attempts have been
|
||
|
|
exhausted or will bail early if the given condition is not met.
|
||
|
|
|
||
|
|
@param queue A queue to invoke the `work` block on.
|
||
|
|
@param count Max number of retry attempts. The `work` block will be executed once if the specified
|
||
|
|
count is less than or equal to zero.
|
||
|
|
@param interval Time to wait before the next retry attempt.
|
||
|
|
@param predicate Condition to check before the next retry attempt. The predicate block provides the
|
||
|
|
the number of remaining retry attempts and the error that the promise was rejected
|
||
|
|
with.
|
||
|
|
@param work A block that executes asynchronously on the given `queue` and returns a value or an
|
||
|
|
error used to resolve the promise.
|
||
|
|
@return A new pending promise that fulfills with the same value as the promise returned from `work`
|
||
|
|
block, or rejects with the same error after all retry attempts have been exhausted or if
|
||
|
|
the given condition is not met.
|
||
|
|
*/
|
||
|
|
+ (FBLPromise *)onQueue:(dispatch_queue_t)queue
|
||
|
|
attempts:(NSInteger)count
|
||
|
|
delay:(NSTimeInterval)interval
|
||
|
|
condition:(nullable FBLPromiseRetryPredicateBlock)predicate
|
||
|
|
retry:(FBLPromiseRetryWorkBlock)work NS_REFINED_FOR_SWIFT;
|
||
|
|
|
||
|
|
@end
|
||
|
|
|
||
|
|
/**
|
||
|
|
Convenience dot-syntax wrappers for `FBLPromise+Retry` operators.
|
||
|
|
Usage: FBLPromise.retry(^id { ... })
|
||
|
|
*/
|
||
|
|
@interface FBLPromise<Value>(DotSyntax_RetryAdditions)
|
||
|
|
|
||
|
|
+ (FBLPromise * (^)(FBLPromiseRetryWorkBlock))retry FBL_PROMISES_DOT_SYNTAX
|
||
|
|
NS_SWIFT_UNAVAILABLE("");
|
||
|
|
+ (FBLPromise * (^)(dispatch_queue_t, FBLPromiseRetryWorkBlock))retryOn FBL_PROMISES_DOT_SYNTAX
|
||
|
|
NS_SWIFT_UNAVAILABLE("");
|
||
|
|
+ (FBLPromise * (^)(NSInteger, NSTimeInterval, FBLPromiseRetryPredicateBlock __nullable,
|
||
|
|
FBLPromiseRetryWorkBlock))retryAgain FBL_PROMISES_DOT_SYNTAX
|
||
|
|
NS_SWIFT_UNAVAILABLE("");
|
||
|
|
+ (FBLPromise * (^)(dispatch_queue_t, NSInteger, NSTimeInterval,
|
||
|
|
FBLPromiseRetryPredicateBlock __nullable,
|
||
|
|
FBLPromiseRetryWorkBlock))retryAgainOn FBL_PROMISES_DOT_SYNTAX
|
||
|
|
NS_SWIFT_UNAVAILABLE("");
|
||
|
|
|
||
|
|
@end
|
||
|
|
|
||
|
|
NS_ASSUME_NONNULL_END
|