public virtual void TestCodecPoolAndGzipDecompressor()
{
// BuiltInZlibInflater should not be used as the GzipCodec decompressor.
// Assert that this is the case.
// Don't use native libs for this test.
Configuration conf = new Configuration();
conf.SetBoolean("hadoop.native.lib", false);
NUnit.Framework.Assert.IsFalse("ZlibFactory is using native libs against request"
, ZlibFactory.IsNativeZlibLoaded(conf));
// This should give us a BuiltInZlibInflater.
Decompressor zlibDecompressor = ZlibFactory.GetZlibDecompressor(conf);
NUnit.Framework.Assert.IsNotNull("zlibDecompressor is null!", zlibDecompressor);
Assert.True("ZlibFactory returned unexpected inflator", zlibDecompressor
is BuiltInZlibInflater);
// its createOutputStream() just wraps the existing stream in a
// java.util.zip.GZIPOutputStream.
CompressionCodecFactory ccf = new CompressionCodecFactory(conf);
CompressionCodec codec = ccf.GetCodec(new Path("foo.gz"));
Assert.True("Codec for .gz file is not GzipCodec", codec is GzipCodec
);
// make sure we don't get a null decompressor
Decompressor codecDecompressor = codec.CreateDecompressor();
if (null == codecDecompressor)
{
NUnit.Framework.Assert.Fail("Got null codecDecompressor");
}
// Asking the CodecPool for a decompressor for GzipCodec
// should not return null
Decompressor poolDecompressor = CodecPool.GetDecompressor(codec);
if (null == poolDecompressor)
{
NUnit.Framework.Assert.Fail("Got null poolDecompressor");
}
// return a couple decompressors
CodecPool.ReturnDecompressor(zlibDecompressor);
CodecPool.ReturnDecompressor(poolDecompressor);
Decompressor poolDecompressor2 = CodecPool.GetDecompressor(codec);
if (poolDecompressor.GetType() == typeof(BuiltInGzipDecompressor))
{
if (poolDecompressor == poolDecompressor2)
{
NUnit.Framework.Assert.Fail("Reused java gzip decompressor in pool");
}
}
else
{
if (poolDecompressor != poolDecompressor2)
{
NUnit.Framework.Assert.Fail("Did not reuse native gzip decompressor in pool");
}
}
}
public virtual void TestGzipLongOverflow()
{
Log.Info("testGzipLongOverflow");
// Don't use native libs for this test.
Configuration conf = new Configuration();
conf.SetBoolean(CommonConfigurationKeys.IoNativeLibAvailableKey, false);
NUnit.Framework.Assert.IsFalse("ZlibFactory is using native libs against request"
, ZlibFactory.IsNativeZlibLoaded(conf));
// Ensure that the CodecPool has a BuiltInZlibInflater in it.
Decompressor zlibDecompressor = ZlibFactory.GetZlibDecompressor(conf);
NUnit.Framework.Assert.IsNotNull("zlibDecompressor is null!", zlibDecompressor);
Assert.True("ZlibFactory returned unexpected inflator", zlibDecompressor
is BuiltInZlibInflater);
CodecPool.ReturnDecompressor(zlibDecompressor);
// Now create a GZip text file.
string tmpDir = Runtime.GetProperty("test.build.data", "/tmp/");
Path f = new Path(new Path(tmpDir), "testGzipLongOverflow.bin.gz");
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new GZIPOutputStream
(new FileOutputStream(f.ToString()))));
int Nbuf = 1024 * 4 + 1;
char[] buf = new char[1024 * 1024];
for (int i = 0; i < buf.Length; i++)
{
buf[i] = '\0';
}
for (int i_1 = 0; i_1 < Nbuf; i_1++)
{
bw.Write(buf);
}
bw.Close();
// Now read it back, using the CodecPool to establish the
// decompressor to use.
CompressionCodecFactory ccf = new CompressionCodecFactory(conf);
CompressionCodec codec = ccf.GetCodec(f);
Decompressor decompressor = CodecPool.GetDecompressor(codec);
FileSystem fs = FileSystem.GetLocal(conf);
InputStream @is = fs.Open(f);
@is = codec.CreateInputStream(@is, decompressor);
BufferedReader br = new BufferedReader(new InputStreamReader(@is));
for (int j = 0; j < Nbuf; j++)
{
int n = br.Read(buf);
Assert.Equal("got wrong read length!", n, buf.Length);
for (int i_2 = 0; i_2 < buf.Length; i_2++)
{
Assert.Equal("got wrong byte!", buf[i_2], '\0');
}
}
br.Close();
}
public virtual void TestGzipCodecRead()
{
// Create a gzipped file and try to read it back, using a decompressor
// from the CodecPool.
// Don't use native libs for this test.
Configuration conf = new Configuration();
conf.SetBoolean(CommonConfigurationKeys.IoNativeLibAvailableKey, false);
NUnit.Framework.Assert.IsFalse("ZlibFactory is using native libs against request"
, ZlibFactory.IsNativeZlibLoaded(conf));
// Ensure that the CodecPool has a BuiltInZlibInflater in it.
Decompressor zlibDecompressor = ZlibFactory.GetZlibDecompressor(conf);
NUnit.Framework.Assert.IsNotNull("zlibDecompressor is null!", zlibDecompressor);
Assert.True("ZlibFactory returned unexpected inflator", zlibDecompressor
is BuiltInZlibInflater);
CodecPool.ReturnDecompressor(zlibDecompressor);
// Now create a GZip text file.
string tmpDir = Runtime.GetProperty("test.build.data", "/tmp/");
Path f = new Path(new Path(tmpDir), "testGzipCodecRead.txt.gz");
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new GZIPOutputStream
(new FileOutputStream(f.ToString()))));
string msg = "This is the message in the file!";
bw.Write(msg);
bw.Close();
// Now read it back, using the CodecPool to establish the
// decompressor to use.
CompressionCodecFactory ccf = new CompressionCodecFactory(conf);
CompressionCodec codec = ccf.GetCodec(f);
Decompressor decompressor = CodecPool.GetDecompressor(codec);
FileSystem fs = FileSystem.GetLocal(conf);
InputStream @is = fs.Open(f);
@is = codec.CreateInputStream(@is, decompressor);
BufferedReader br = new BufferedReader(new InputStreamReader(@is));
string line = br.ReadLine();
Assert.Equal("Didn't get the same message back!", msg, line);
br.Close();
}
public virtual Decompressor CreateDecompressor()
{
return(ZlibFactory.GetZlibDecompressor(conf));
}