/// <exception cref="System.IO.IOException"/>
private void ReadTokensFromFiles(Configuration conf, Credentials credentials)
{
// add tokens and secrets coming from a token storage file
string binaryTokenFilename = conf.Get("mapreduce.job.credentials.binary");
if (binaryTokenFilename != null)
{
Credentials binary = Credentials.ReadTokenStorageFile(FileSystem.GetLocal(conf).MakeQualified
(new Path(binaryTokenFilename)), conf);
credentials.AddAll(binary);
}
// add secret keys coming from a json file
string tokensFileName = conf.Get("mapreduce.job.credentials.json");
if (tokensFileName != null)
{
Log.Info("loading user's secret keys from " + tokensFileName);
string localFileName = new Path(tokensFileName).ToUri().GetPath();
bool json_error = false;
try
{
// read JSON
ObjectMapper mapper = new ObjectMapper();
IDictionary <string, string> nm = mapper.ReadValue <IDictionary>(new FilePath(localFileName
));
foreach (KeyValuePair <string, string> ent in nm)
{
credentials.AddSecretKey(new Text(ent.Key), Sharpen.Runtime.GetBytesForString(ent
.Value, Charsets.Utf8));
}
}
catch (JsonMappingException)
{
json_error = true;
}
catch (JsonParseException)
{
json_error = true;
}
if (json_error)
{
Log.Warn("couldn't parse Token Cache JSON file with user secret keys");
}
}
}
