private HdfsCommandRunner([Parameter(typeof(NumberOfRetries))] int numberOfRetries,
[Parameter(typeof(CommandTimeOut))] int timeOutInMilliSeconds,
[Parameter(typeof(HadoopHome))] string hadoopHome)
{
_numberOfRetries = numberOfRetries;
_timeOutInMilliSeconds = timeOutInMilliSeconds;
if (!PathUtilities.AreNormalizedEquals(hadoopHome, HadoopHome.DefaultValue))
{
// The user provided a Hadoop Home folder.
if (Directory.Exists(hadoopHome))
{
// The user provided folder does exist.
_hdfsCommandPath = GetFullPathToHdfsCommand(hadoopHome);
}
else
{
// The user provided folder does not exist. Try the environment variable.
Logger.Log(Level.Warning,
"The provided hadoop home folder {0} doesn't exist, trying environment variable {1} instead",
hadoopHome, HadoopHomeEnvironmentVariableName);
_hdfsCommandPath = GetFullPathToHdfsCommandBasedOnEnvironmentVariable();
}
}
else
{
// The user did not provide a Hadoop Home folder. Use the Environment variable.
_hdfsCommandPath = GetFullPathToHdfsCommandBasedOnEnvironmentVariable();
}
// Make sure we found the command.
if (!File.Exists(_hdfsCommandPath))
{
throw new FileNotFoundException("HDFS Command not found", _hdfsCommandPath);
}
}