public HdfsLogAppendStream(Uri logUri, bool deleteIfExists)
{
_logUri = logUri;
string logPath = _logUri.AbsolutePath;
string logDirectory = logPath.Substring(0, logPath.LastIndexOf('/'));
_writePosition = 0;
try
{
_hdfs = new HdfsInstance(_logUri);
_hdfs.EnsureDirectory(logDirectory);
if (_hdfs.IsFileExists(logPath))
{
if (deleteIfExists)
{
_hdfs.DeleteFile(logPath, false);
}
else
{
throw new ApplicationException("Log file " + logUri.AbsoluteUri + " already exists");
}
}
_writer = _hdfs.OpenCreate(logPath, 1024 * 1024, -1);
}
catch (Exception e)
{
throw new ApplicationException("HdfsLogAppendStream failed to open writer", e);
}
}
public override void Close()
{
if (writer != null)
{
writer.Dispose();
writer = null;
}
}
public HdfsStreamWriter(HdfsInstance instance, string dfsPath, string user, int bufferSize, long blockSize)
{
this.writer = instance.OpenCreate(dfsPath, bufferSize, blockSize);
instance.SetOwnerAndPermission(dfsPath, user, null, Convert.ToInt16("644", 8));
}