我已经浏览了亚马逊网络服务（AWS）的文档，用于Kinesis Streaming（实时数据处理）。但我对如何实现Kinesis Streaming感到困惑。
但是我如何知道数据是否成功保存在Stream中？我怎样才能打印日志？
我想在控制台中显示已成功保存的数据。
AppDelegate Code:
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
AWSLogger.default().logLevel = .verbose
let CognitoPoolID = "ap-northeast-1:430840dc-4df5-469f"
let Region = AWSRegionType.APNortheast1
let credentialsProvider = AWSCognitoCredentialsProvider(regionType:Region,identityPoolId:CognitoPoolID)
let configuration = AWSServiceConfiguration(region:Region, credentialsProvider:credentialsProvider)
AWSServiceManager.default().defaultServiceConfiguration = configuration
return true
}
ViewController代码：导入UIKit导入AWSKinesis
class ViewController：UIViewController {
var kinesisRecorder : AWSKinesisRecorder! = nil
override func viewDidLoad() {
super.viewDidLoad()
//use AWSKinesisRecorder with Amazon Kinesis. The following snippet returns a shared instance of the Amazon Kinesis service client
kinesisRecorder = AWSKinesisRecorder.default()
configureAWSKinesisRecorder()
saveDataInStream()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
/*
* Method to configure perties of AWSKinesisRecorder
*/
func configureAWSKinesisRecorder() {
//The diskAgeLimit property sets the expiration for cached requests. When a request exceeds the limit, it's discarded. The default is no age limit.
kinesisRecorder.diskAgeLimit = TimeInterval(30 * 24 * 60 * 60); // 30 days
//The diskByteLimit property holds the limit of the disk cache size in bytes. If the storage limit is exceeded, older requests are discarded. The default value is 5 MB. Setting the value to 0 means that there's no practical limit.
kinesisRecorder.diskByteLimit = UInt(10 * 1024 * 1024); // 10MB
//The notficationByteThreshold property sets the point beyond which Kinesis issues a notification that the byte threshold has been reached. The default value is 0, meaning that by default Amazon Kinesis doesn't post the notification.
kinesisRecorder.notificationByteThreshold = UInt(5 * 1024 * 1024); // 5MB
}
/*
* Method to save real time data in AWS stream
*/
func saveDataInStream() {
//Both saveRecord and submitAllRecords are asynchronous operations, so you should ensure that saveRecord is complete before you invoke submitAllRecords.
// Create an array to store a batch of objects.
var tasks = Array<AWSTask<AnyObject>>()
for i in 0...5 {
//create an NSData object .
//StreamName should be a string corresponding to the name of your Kinesis stream.
//save it locally in kinesisRecorder instances
tasks.append(kinesisRecorder!.saveRecord(String(format: "TestString-%02d", i).data(using: .utf8), streamName: "my_stream")!)
}
////submitAllRecords sends all locally saved requests to the Amazon Kinesis service.
AWSTask(forCompletionOfAllTasks: tasks).continueOnSuccessWith(block: { (task:AWSTask<AnyObject>) -> AWSTask<AnyObject>? in
return self.kinesisRecorder?.submitAllRecords()
}).continueWith(block: { (task:AWSTask<AnyObject>) -> Any? in
if let error = task.error as? NSError {
print("Error: \(error)")
}
return nil
}
)
} }
Kinesis中没有任何功能可以执行您想要的操作。但是，另一种方法是查询流将数据放入的服务（S3，dynamo等...）
您可以直接使用AWSKinesis而不是使用AWSKinesisRecorder。
putRecords方法（http://docs.aws.amazon.com/AWSiOSSDK/latest/Classes/AWSKinesis.html#//api/name/putRecords:completionHandler :)将为您明确地将记录写入流中，而不是在记录器中抽象记录保存。
此方法为您提供了一个completionHandler块，您可以使用它来查看Kinesis正在响应的内容，无论是成功的记录ID还是错误代码。从那里你可以登录你的控制台或做任何你喜欢的响应。需要注意的是，您需要手动批量记录以调用putRecords。您可以使用用户默认值或领域在本地存储事件，然后按计划将它们刷新到Kinesis。这是录音机免费提供的。
或者，如果您只是希望看到事件成功通过Kinesis流，您可以将Kinesis Firehose流连接到您的Kinesis流，您可以将其配置为将事件数据传递到S3，Amazon ElasticSearch或Amazon Redshift： https://aws.amazon.com/kinesis/data-firehose/