private static void PerformWriteFlushReadSeek(DataLakeFileSystemClient client)
{
string fileName = "/Test/dir1/testFilename1.txt";
DataLakeFileClient file = client.GetFileClient(fileName);
// Create the file
Stream stream = BinaryData.FromString("This is the first line.\nThis is the second line.\n").ToStream();
long length = stream.Length;
file.Upload(stream, true);
// Append to the file
stream = BinaryData.FromString("This is the third line.\nThis is the fourth line.\n").ToStream();
file.Append(stream, length);
file.Flush(length + stream.Length);
// Read the file
using (var readStream = file.OpenRead())
{
byte[] readData = new byte[1024];
// Read 40 bytes at this offset
int readBytes = readStream.Read(readData, 25, 40);
Console.WriteLine("Read output of 40 bytes from offset 25: " + Encoding.UTF8.GetString(readData, 0, readBytes));
}
}
public List <Project> GetProjects(
ProjectReader reader)
{
List <string> fileNames = GetFileNames(MIPPEN_FILE_SEARCH_TERM);
List <Project> projects = new List <Project>();
DataLakeFileSystemClient fileSystemClient =
serviceClient.GetFileSystemClient(fileSystemName);
foreach (var fileName in fileNames)
{
// Get file contents
DataLakeFileClient fileClient =
fileSystemClient.GetFileClient(fileName);
// Try to get a project
Project project;
using (var stream = fileClient.OpenRead())
{
project = reader.Read(stream);
}
if (project is not null)
{
projects.Add(project);
}
}
return(projects);
}
private static void TestTokenRefresh(DataLakeFileSystemClient client)
{
string path = "/Test/TokenRefresh.txt";
DataLakeFileClient file = client.GetFileClient(path);
// Create file
file.Upload(
BinaryData.FromString("This is the first file.").ToStream(), overwrite: true);
// Wait 1 mins
Console.WriteLine("The token is refreshing...");
Thread.Sleep(60 * 1000);
// Read file - this still works, because token is internally refreshed
using (var readStream = new StreamReader(file.OpenRead()))
{
string line;
while ((line = readStream.ReadLine()) != null)
{
Console.WriteLine(line);
}
}
}