[英]My java loop is finishing early when I call a function but works normally when the function is not called
[英]Sending file to blob only works when function is called in while loop
我有要修改的Azure blob示例代碼。 但是,uploadFile函數僅在開關情況下處於while循環中時才起作用。 如果我退出循環,它將創建容器,但無法上傳文件。
我嘗試將其取出並從代碼中的不同位置調用該函數,但是它們都不起作用。
uploadFile函數:
static void uploadFile(BlockBlobURL blob, File sourceFile) throws IOException {
AsynchronousFileChannel fileChannel = AsynchronousFileChannel.open(sourceFile.toPath());
// Uploading a file to the blobURL using the high-level methods available in TransferManager class
// Alternatively call the PutBlob/PutBlock low-level methods from BlockBlobURL type
TransferManager.uploadFileToBlockBlob(fileChannel, blob, 8*1024*1024, null, null)
.subscribe(response-> {
System.out.println("Completed upload request.");
TimeUnit.SECONDS.sleep(5);
System.out.println(response.response().statusCode());
});
}
主要相關部分
// Listening for commands from the console
//THIS IS THE PART THAT ONLY MAKES THE CONTAINER
/*
System.out.println("Uploading the sample file into the container: " + containerURL );
uploadFile(blobURL, sampleFile);
System.out.println("File Uploaded");
*/
//TRYING TO CALL FUNCTION FROM OUTSIDE WHILE, BUT IT ONLY WORKS HERE
System.out.println("Enter a command");
System.out.println("(P)utBlob | (L)istBlobs | (G)etBlob");
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
while (true) {
System.out.println("# Enter a command : ");
String input = reader.readLine();
switch(input){
case "P":
System.out.println("Uploading the sample file into the container: " + containerURL );
uploadFile(blobURL, sampleFile);
break;
在while循環外部調用的uploadFile創建了容器,但實際上並未將文件上傳到blob,而while循環和switch情況下的uploadFile確實可以
由於上傳過程尚未完成且主過程已完成,因此不會上傳Blob。 因此,我只是將Thread.sleep()
添加到主進程中。 並且提醒不要將值設置得太短,否則仍然會失敗。 在我的測試中,我將其設置為2000
毫秒。
public static void main(String[] args) throws java.lang.Exception{
ContainerURL containerURL;
// Creating a sample file to use in the sample
File sampleFile = null;
try {
sampleFile = File.createTempFile("downloadedFile", ".txt");
// Retrieve the credentials and initialize SharedKeyCredentials
String accountName = "xxxxxx";
String accountKey = "xxxxxxx";
// Create a ServiceURL to call the Blob service. We will also use this to construct the ContainerURL
SharedKeyCredentials creds = new SharedKeyCredentials(accountName, accountKey);
// We are using a default pipeline here, you can learn more about it at https://github.com/Azure/azure-storage-java/wiki/Azure-Storage-Java-V10-Overview
final ServiceURL serviceURL = new ServiceURL(new URL("https://" + accountName + ".blob.core.windows.net"), StorageURL.createPipeline(creds, new PipelineOptions()));
// Let's create a container using a blocking call to Azure Storage
// If container exists, we'll catch and continue
containerURL = serviceURL.createContainerURL("quickstart");
try {
ContainerCreateResponse response = containerURL.create(null, null, null).blockingGet();
System.out.println("Container Create Response was " + response.statusCode());
} catch (RestException e){
if (e instanceof RestException && ((RestException)e).response().statusCode() != 409) {
throw e;
} else {
System.out.println("quickstart container already exists, resuming...");
}
}
// Create a BlockBlobURL to run operations on Blobs
final BlockBlobURL blobURL = containerURL.createBlockBlobURL("SampleBlob.txt");
System.out.println("Uploading the sample file into the container: " + containerURL );
AsynchronousFileChannel fileChannel = AsynchronousFileChannel.open(sampleFile.toPath());
// Uploading a file to the blobURL using the high-level methods available in TransferManager class
// Alternatively call the PutBlob/PutBlock low-level methods from BlockBlobURL type
TransferManager.uploadFileToBlockBlob(fileChannel, blobURL, 8*1024*1024, null, null)
.subscribe(response-> {
System.out.println("Completed upload request.");
System.out.println(response.response().statusCode());
});
Thread.sleep(2000);
} catch (InvalidKeyException e) {
System.out.println("Invalid Storage account name/key provided");
} catch (MalformedURLException e) {
System.out.println("Invalid URI provided");
} catch (RestException e){
System.out.println("Service error returned: " + e.response().statusCode() );
} catch (IOException e) {
e.printStackTrace();
System.exit(-1);
}
}
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