/**
* Returns ACLs for the application. An empty map is returned if no ACLs are found.
*
* @return a map of the Application ACLs.
* @throws IOException
*/
public Map<ApplicationAccessType, String> getApplicationAcls() throws IOException {
// TODO Seek directly to the key once a comparator is specified.
TFile.Reader.Scanner aclScanner = reader.createScanner();
LogKey key = new LogKey();
Map<ApplicationAccessType, String> acls = new HashMap<ApplicationAccessType, String>();
while (!aclScanner.atEnd()) {
TFile.Reader.Scanner.Entry entry = aclScanner.entry();
key.readFields(entry.getKeyStream());
if (key.toString().equals(APPLICATION_ACL_KEY.toString())) {
DataInputStream valueStream = entry.getValueStream();
while (true) {
String appAccessOp = null;
String aclString = null;
try {
appAccessOp = valueStream.readUTF();
} catch (EOFException e) {
// Valid end of stream.
break;
}
try {
aclString = valueStream.readUTF();
} catch (EOFException e) {
throw new YarnRuntimeException("Error reading ACLs", e);
}
acls.put(ApplicationAccessType.valueOf(appAccessOp), aclString);
}
}
aclScanner.advance();
}
return acls;
}
public LogReader(Configuration conf, Path remoteAppLogFile) throws IOException {
FileContext fileContext = FileContext.getFileContext(conf);
this.fsDataIStream = fileContext.open(remoteAppLogFile);
reader =
new TFile.Reader(
this.fsDataIStream, fileContext.getFileStatus(remoteAppLogFile).getLen(), conf);
this.scanner = reader.createScanner();
}
/**
* Returns the owner of the application.
*
* @return the application owner.
* @throws IOException
*/
public String getApplicationOwner() throws IOException {
TFile.Reader.Scanner ownerScanner = reader.createScanner();
LogKey key = new LogKey();
while (!ownerScanner.atEnd()) {
TFile.Reader.Scanner.Entry entry = ownerScanner.entry();
key.readFields(entry.getKeyStream());
if (key.toString().equals(APPLICATION_OWNER_KEY.toString())) {
DataInputStream valueStream = entry.getValueStream();
return valueStream.readUTF();
}
ownerScanner.advance();
}
return null;
}
@Override
public void initialize(InputSplit split, TaskAttemptContext context)
throws IOException, InterruptedException {
FileSplit fileSplit = (FileSplit) split;
LOG.info("Initializing TFileRecordReader : " + fileSplit.getPath().toString());
start = fileSplit.getStart();
end = start + fileSplit.getLength();
FileSystem fs = fileSplit.getPath().getFileSystem(context.getConfiguration());
splitPath = fileSplit.getPath();
fin = fs.open(splitPath);
reader =
new TFile.Reader(fin, fs.getFileStatus(splitPath).getLen(), context.getConfiguration());
scanner = reader.createScannerByByteRange(start, fileSplit.getLength());
}