如何解决AWSS3TransferUtility:如何在应用重启后重试失败的上传任务
我想在应用重启后重试以前失败的S3上传任务。在应用初始化时,我致电
// register a transfer utility object asynchronously
AWSS3TransferUtility.register(
with: configuration!,transferUtilityConfiguration: tuConf,forKey: "..." // redacted
) { (error) in
if let error = error {
// handle registration error.
Logging.logError("Error in registration: \(error)")
} else {
Logging.logDebug("AWS S3 TransferUtility registration success,now check for pending tasks")
DispatchQueue.global().asyncAfter(deadline: .now() + 2.0) {
finishPendingTasks()
}
}
}
这是完成待处理任务的功能
static func finishPendingTasks() {
let transferUtility = AWSS3TransferUtility.default()
let uploadTasks = transferUtility.getUploadTasks().result
Logging.logDebug("Finish pending AWS upload tasks")
var progressBlock: AWSS3TransferUtilityProgressBlock?
progressBlock = {(task,progress) in
DispatchQueue.main.async(execute: {
// Do something e.g. Update a progress bar.
Logging.logDebug("upload in process \(progress)")
})
}
var completionHandler: AWSS3TransferUtilityUploadCompletionHandlerBlock?
completionHandler = { (task,error) -> Void in
DispatchQueue.main.async(execute: {
// Do something e.g. Alert a user for transfer completion.
// On failed uploads,`error` contains the error object.
Logging.logDebug("upload completed1 \(task.bucket)")
Logging.logDebug("upload completed2 \(String(describing: task.response))")
Logging.logDebug("upload completed3 \(task.key)")
Logging.logDebug("upload error \(String(describing: error))")
})
}
let taskCount = uploadTasks?.count ?? 0
Logging.logDebug("Number of upload tasks: \(taskCount)")
for task in uploadTasks! {
if let awsTask = task as? AWSS3TransferUtilityUploadTask {
Logging.logDebug("Resuming uploading task key \(awsTask.key),transfer ID: \(awsTask.transferID),status: \(awsTask.status.rawValue)")
awsTask.setCompletionHandler(completionHandler!)
awsTask.setProgressBlock(progressBlock!)
awsTask.resume() // <------- HAS NO EFFECT!
}
}
}
状态rawValue为0
不确定resume()是否触发重试。某处有记录的程序吗?
没有看到完成处理程序/进度块插入。
在查看this时,AWS似乎并没有真正跟踪与任务相关的数据,并且看起来必须手动维护和上传数据。
有人知道如何处理重试吗?
解决方法
默认情况下,重试限制似乎为0。可以通过设置进行更改
AWSS3TransferUtilityConfiguration().retryLimit = ...
resume()在这种情况下不适用。
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。