/// <exception cref="System.IO.IOException"/>
internal static void ReadRecords(FileSystem fs, Path path, int count, Configuration
conf)
{
TFile.Reader reader = new TFile.Reader(fs.Open(path), fs.GetFileStatus(path).GetLen
(), conf);
TFile.Reader.Scanner scanner = reader.CreateScanner();
try
{
for (int nx = 0; nx < count; nx++, scanner.Advance())
{
NUnit.Framework.Assert.IsFalse(scanner.AtEnd());
// Assert.assertTrue(scanner.next());
byte[] kbuf = new byte[BufSize];
int klen = scanner.Entry().GetKeyLength();
scanner.Entry().GetKey(kbuf);
Assert.Equal(Runtime.GetStringForBytes(kbuf, 0, klen),
ComposeSortedKey(Key, nx));
byte[] vbuf = new byte[BufSize];
int vlen = scanner.Entry().GetValueLength();
scanner.Entry().GetValue(vbuf);
Assert.Equal(Runtime.GetStringForBytes(vbuf, 0, vlen),
Value + nx);
}
Assert.True(scanner.AtEnd());
NUnit.Framework.Assert.IsFalse(scanner.Advance());
}
finally
{
scanner.Close();
reader.Close();
}
}
/// <exception cref="System.IO.IOException"/>
private void ReadKeyWithoutValue(int recordIndex)
{
TFile.Reader reader = new TFile.Reader(fs.Open(path), fs.GetFileStatus(path).GetLen
(), conf);
TFile.Reader.Scanner scanner = reader.CreateScannerByKey(Runtime.GetBytesForString
(ComposeSortedKey(Key, recordIndex)), null);
try
{
// read the indexed key
byte[] kbuf1 = new byte[BufSize];
int klen1 = scanner.Entry().GetKeyLength();
scanner.Entry().GetKey(kbuf1);
Assert.Equal(Runtime.GetStringForBytes(kbuf1, 0, klen1
), ComposeSortedKey(Key, recordIndex));
if (scanner.Advance() && !scanner.AtEnd())
{
// read the next key following the indexed
byte[] kbuf2 = new byte[BufSize];
int klen2 = scanner.Entry().GetKeyLength();
scanner.Entry().GetKey(kbuf2);
Assert.Equal(Runtime.GetStringForBytes(kbuf2, 0, klen2
), ComposeSortedKey(Key, recordIndex + 1));
}
}
finally
{
scanner.Close();
reader.Close();
}
}
/// <exception cref="System.IO.IOException"/>
internal virtual void ReadFile()
{
long fileLength = fs.GetFileStatus(path).GetLen();
int numSplit = 10;
long splitSize = fileLength / numSplit + 1;
TFile.Reader reader = new TFile.Reader(fs.Open(path), fs.GetFileStatus(path).GetLen
(), conf);
long offset = 0;
long rowCount = 0;
BytesWritable key;
BytesWritable value;
for (int i = 0; i < numSplit; ++i, offset += splitSize)
{
TFile.Reader.Scanner scanner = reader.CreateScannerByByteRange(offset, splitSize);
int count = 0;
key = new BytesWritable();
value = new BytesWritable();
while (!scanner.AtEnd())
{
scanner.Entry().Get(key, value);
++count;
scanner.Advance();
}
scanner.Close();
Assert.True(count > 0);
rowCount += count;
}
Assert.Equal(rowCount, reader.GetEntryCount());
reader.Close();
}
public virtual void TestNoDataEntry()
{
if (skip)
{
return;
}
CloseOutput();
TFile.Reader reader = new TFile.Reader(fs.Open(path), fs.GetFileStatus(path).GetLen
(), conf);
Assert.True(reader.IsSorted());
TFile.Reader.Scanner scanner = reader.CreateScanner();
Assert.True(scanner.AtEnd());
scanner.Close();
reader.Close();
}
/// <exception cref="System.IO.IOException"/>
public virtual bool Next()
{
if (scanner.AtEnd())
{
return(false);
}
TFile.Reader.Scanner.Entry entry = scanner.Entry();
keyLength = entry.GetKeyLength();
CheckKeyBuffer(keyLength);
entry.GetKey(keyBuffer);
valueLength = entry.GetValueLength();
CheckValueBuffer(valueLength);
entry.GetValue(valueBuffer);
scanner.Advance();
return(true);
}
/// <summary>Returns the owner of the application.</summary>
/// <returns>the application owner.</returns>
/// <exception cref="System.IO.IOException"/>
public virtual string GetApplicationOwner()
{
TFile.Reader.Scanner ownerScanner = reader.CreateScanner();
AggregatedLogFormat.LogKey key = new AggregatedLogFormat.LogKey();
while (!ownerScanner.AtEnd())
{
TFile.Reader.Scanner.Entry entry = ownerScanner.Entry();
key.ReadFields(entry.GetKeyStream());
if (key.ToString().Equals(ApplicationOwnerKey.ToString()))
{
DataInputStream valueStream = entry.GetValueStream();
return(valueStream.ReadUTF());
}
ownerScanner.Advance();
}
return(null);
}
/// <summary>Returns ACLs for the application.</summary>
/// <remarks>
/// Returns ACLs for the application. An empty map is returned if no ACLs are
/// found.
/// </remarks>
/// <returns>a map of the Application ACLs.</returns>
/// <exception cref="System.IO.IOException"/>
public virtual IDictionary <ApplicationAccessType, string> GetApplicationAcls()
{
// TODO Seek directly to the key once a comparator is specified.
TFile.Reader.Scanner aclScanner = reader.CreateScanner();
AggregatedLogFormat.LogKey key = new AggregatedLogFormat.LogKey();
IDictionary <ApplicationAccessType, string> acls = new Dictionary <ApplicationAccessType
, string>();
while (!aclScanner.AtEnd())
{
TFile.Reader.Scanner.Entry entry = aclScanner.Entry();
key.ReadFields(entry.GetKeyStream());
if (key.ToString().Equals(ApplicationAclKey.ToString()))
{
DataInputStream valueStream = entry.GetValueStream();
while (true)
{
string appAccessOp = null;
string aclString = null;
try
{
appAccessOp = valueStream.ReadUTF();
}
catch (EOFException)
{
// Valid end of stream.
break;
}
try
{
aclString = valueStream.ReadUTF();
}
catch (EOFException e)
{
throw new YarnRuntimeException("Error reading ACLs", e);
}
acls[ApplicationAccessType.ValueOf(appAccessOp)] = aclString;
}
}
aclScanner.Advance();
}
return(acls);
}
/// <exception cref="System.IO.IOException"/>
public virtual void SeekTFile()
{
int miss = 0;
long totalBytes = 0;
FSDataInputStream fsdis = fs.Open(path);
TFile.Reader reader = new TFile.Reader(fsdis, fs.GetFileStatus(path).GetLen(), conf
);
KeySampler kSampler = new KeySampler(rng, reader.GetFirstKey(), reader.GetLastKey
(), keyLenGen);
TFile.Reader.Scanner scanner = reader.CreateScanner();
BytesWritable key = new BytesWritable();
BytesWritable val = new BytesWritable();
timer.Reset();
timer.Start();
for (int i = 0; i < options.seekCount; ++i)
{
kSampler.Next(key);
scanner.LowerBound(key.Get(), 0, key.GetSize());
if (!scanner.AtEnd())
{
scanner.Entry().Get(key, val);
totalBytes += key.GetSize();
totalBytes += val.GetSize();
}
else
{
++miss;
}
}
timer.Stop();
double duration = (double)timer.Read() / 1000;
// in us.
System.Console.Out.Printf("time: %s...avg seek: %s...%d hit...%d miss...avg I/O size: %.2fKB\n"
, timer.ToString(), NanoTimer.NanoTimeToString(timer.Read() / options.seekCount)
, options.seekCount - miss, miss, (double)totalBytes / 1024 / (options.seekCount
- miss));
}
/* Similar to readFile(), tests the scanner created
* by record numbers rather than the offsets.
*/
/// <exception cref="System.IO.IOException"/>
internal virtual void ReadRowSplits(int numSplits)
{
TFile.Reader reader = new TFile.Reader(fs.Open(path), fs.GetFileStatus(path).GetLen
(), conf);
long totalRecords = reader.GetEntryCount();
for (int i = 0; i < numSplits; i++)
{
long startRec = i * totalRecords / numSplits;
long endRec = (i + 1) * totalRecords / numSplits;
if (i == numSplits - 1)
{
endRec = totalRecords;
}
TFile.Reader.Scanner scanner = reader.CreateScannerByRecordNum(startRec, endRec);
int count = 0;
BytesWritable key = new BytesWritable();
BytesWritable value = new BytesWritable();
long x = startRec;
while (!scanner.AtEnd())
{
Assert.Equal("Incorrect RecNum returned by scanner", scanner.GetRecordNum
(), x);
scanner.Entry().Get(key, value);
++count;
Assert.Equal("Incorrect RecNum returned by scanner", scanner.GetRecordNum
(), x);
scanner.Advance();
++x;
}
scanner.Close();
Assert.True(count == (endRec - startRec));
}
// make sure specifying range at the end gives zero records.
TFile.Reader.Scanner scanner_1 = reader.CreateScannerByRecordNum(totalRecords, -1
);
Assert.True(scanner_1.AtEnd());
}
/// <exception cref="System.IO.IOException"/>
private void ReadValueWithoutKey(int recordIndex)
{
TFile.Reader reader = new TFile.Reader(fs.Open(path), fs.GetFileStatus(path).GetLen
(), conf);
TFile.Reader.Scanner scanner = reader.CreateScannerByKey(Runtime.GetBytesForString
(ComposeSortedKey(Key, recordIndex)), null);
byte[] vbuf1 = new byte[BufSize];
int vlen1 = scanner.Entry().GetValueLength();
scanner.Entry().GetValue(vbuf1);
Assert.Equal(Runtime.GetStringForBytes(vbuf1, 0, vlen1
), Value + recordIndex);
if (scanner.Advance() && !scanner.AtEnd())
{
byte[] vbuf2 = new byte[BufSize];
int vlen2 = scanner.Entry().GetValueLength();
scanner.Entry().GetValue(vbuf2);
Assert.Equal(Runtime.GetStringForBytes(vbuf2, 0, vlen2
), Value + (recordIndex + 1));
}
scanner.Close();
reader.Close();
}
public virtual void TestSortedLongWritable()
{
Configuration conf = new Configuration();
Path path = new Path(Root, name);
FileSystem fs = path.GetFileSystem(conf);
FSDataOutputStream @out = fs.Create(path);
try
{
TFile.Writer writer = new TFile.Writer(@out, BlockSize, "gz", jClassLongWritableComparator
, conf);
try
{
LongWritable key = new LongWritable(0);
for (long i = 0; i < Nentry; ++i)
{
key.Set(Cube(i - Nentry / 2));
DataOutputStream dos = writer.PrepareAppendKey(-1);
try
{
key.Write(dos);
}
finally
{
dos.Close();
}
dos = writer.PrepareAppendValue(-1);
try
{
dos.Write(Runtime.GetBytesForString(BuildValue(i)));
}
finally
{
dos.Close();
}
}
}
finally
{
writer.Close();
}
}
finally
{
@out.Close();
}
FSDataInputStream @in = fs.Open(path);
try
{
TFile.Reader reader = new TFile.Reader(@in, fs.GetFileStatus(path).GetLen(), conf
);
try
{
TFile.Reader.Scanner scanner = reader.CreateScanner();
long i = 0;
BytesWritable value = new BytesWritable();
for (; !scanner.AtEnd(); scanner.Advance())
{
scanner.Entry().GetValue(value);
Assert.Equal(BuildValue(i), Runtime.GetStringForBytes(
value.GetBytes(), 0, value.GetLength()));
++i;
}
}
finally
{
reader.Close();
}
}
finally
{
@in.Close();
}
}