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internal typealias RETRY_PREDICATE = (Throwable) -> Boolean | |
internal const val MAX_RETRIES = 3L | |
internal const val DEFAULT_INTERVAL = 1L | |
internal val TIMEOUT: RETRY_PREDICATE = { it is SocketTimeoutException } | |
internal val NETWORK: RETRY_PREDICATE = { it is IOException } | |
internal val SERVICE_UNAVAILABLE: RETRY_PREDICATE = { it is HttpException && it.code() == 503 } | |
internal fun <T> applyRetryPolicy( | |
vararg predicates: RETRY_PREDICATE, | |
maxRetries: Long = MAX_RETRIES, | |
interval: Long = DEFAULT_INTERVAL, | |
unit: TimeUnit = TimeUnit.SECONDS, | |
resumeNext: (Throwable) -> SingleSource<T> | |
) = SingleTransformer<T, T> { single -> | |
single.retryWhen { attempts -> | |
Flowables.zip( | |
attempts.map { error -> if (predicates.count { it(error) } > 0) error else throw error }, | |
Flowable.interval(interval, unit) | |
).map { (error, retryCount) -> if (retryCount >= maxRetries) throw error } | |
}.onErrorResumeNext(resumeNext) | |
} |
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