/// <exception cref="System.IO.IOException"/>
public virtual void TestGzipCodecWrite(bool useNative)
{
// Create a gzipped file using a compressor from the CodecPool,
// and try to read it back via the regular GZIPInputStream.
// Use native libs per the parameter
Configuration conf = new Configuration();
conf.SetBoolean(CommonConfigurationKeys.IoNativeLibAvailableKey, useNative);
if (useNative)
{
if (!ZlibFactory.IsNativeZlibLoaded(conf))
{
Log.Warn("testGzipCodecWrite skipped: native libs not loaded");
return;
}
}
else
{
NUnit.Framework.Assert.IsFalse("ZlibFactory is using native libs against request"
, ZlibFactory.IsNativeZlibLoaded(conf));
}
// Ensure that the CodecPool has a BuiltInZlibDeflater in it.
Compressor zlibCompressor = ZlibFactory.GetZlibCompressor(conf);
NUnit.Framework.Assert.IsNotNull("zlibCompressor is null!", zlibCompressor);
Assert.True("ZlibFactory returned unexpected deflator", useNative
? zlibCompressor is ZlibCompressor : zlibCompressor is BuiltInZlibDeflater);
CodecPool.ReturnCompressor(zlibCompressor);
// Create a GZIP text file via the Compressor interface.
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
);
string msg = "This is the message we are going to compress.";
string tmpDir = Runtime.GetProperty("test.build.data", "/tmp/");
string fileName = new Path(new Path(tmpDir), "testGzipCodecWrite.txt.gz").ToString
();
BufferedWriter w = null;
Compressor gzipCompressor = CodecPool.GetCompressor(codec);
if (null != gzipCompressor)
{
// If it gives us back a Compressor, we should be able to use this
// to write files we can then read back with Java's gzip tools.
OutputStream os = new CompressorStream(new FileOutputStream(fileName), gzipCompressor
);
w = new BufferedWriter(new OutputStreamWriter(os));
w.Write(msg);
w.Close();
CodecPool.ReturnCompressor(gzipCompressor);
VerifyGzipFile(fileName, msg);
}
// Create a gzip text file via codec.getOutputStream().
w = new BufferedWriter(new OutputStreamWriter(codec.CreateOutputStream(new FileOutputStream
(fileName))));
w.Write(msg);
w.Close();
VerifyGzipFile(fileName, msg);
}
/// <summary>Allow children types to put a different type in here.</summary>
/// <param name="out">the Deflater stream to use</param>
protected internal GzipOutputStream(CompressorStream @out)
: base(@out)
{
}