public virtual void TestGzipCodecWithParam() { Configuration conf = new Configuration(this.conf); ZlibFactory.SetCompressionLevel(conf, ZlibCompressor.CompressionLevel.BestCompression ); ZlibFactory.SetCompressionStrategy(conf, ZlibCompressor.CompressionStrategy.HuffmanOnly ); CodecTest(conf, seed, 0, "org.apache.hadoop.io.compress.GzipCodec"); CodecTest(conf, seed, count, "org.apache.hadoop.io.compress.GzipCodec"); }
/// <exception cref="System.IO.IOException"/> private static void CodecTestWithNOCompression(Configuration conf, string codecClass ) { // Create a compressor with NO_COMPRESSION and make sure that // output is not compressed by comparing the size with the // original input CompressionCodec codec = null; ZlibFactory.SetCompressionLevel(conf, ZlibCompressor.CompressionLevel.NoCompression ); try { codec = (CompressionCodec)ReflectionUtils.NewInstance(conf.GetClassByName(codecClass ), conf); } catch (TypeLoadException) { throw new IOException("Illegal codec!"); } Compressor c = codec.CreateCompressor(); // ensure same compressor placed earlier ByteArrayOutputStream bos = new ByteArrayOutputStream(); CompressionOutputStream cos = null; // write trivially compressable data byte[] b = new byte[1 << 15]; Arrays.Fill(b, unchecked ((byte)43)); try { cos = codec.CreateOutputStream(bos, c); cos.Write(b); } finally { if (cos != null) { cos.Close(); } } byte[] outbytes = bos.ToByteArray(); // verify data were not compressed Assert.True("Compressed bytes contrary to configuration(NO_COMPRESSION)" , outbytes.Length >= b.Length); }
/// <exception cref="System.IO.IOException"/> private static void GzipReinitTest(Configuration conf, CompressionCodec codec) { // Add codec to cache ZlibFactory.SetCompressionLevel(conf, ZlibCompressor.CompressionLevel.BestCompression ); ZlibFactory.SetCompressionStrategy(conf, ZlibCompressor.CompressionStrategy.DefaultStrategy ); Compressor c1 = CodecPool.GetCompressor(codec); CodecPool.ReturnCompressor(c1); // reset compressor's compression level to perform no compression ZlibFactory.SetCompressionLevel(conf, ZlibCompressor.CompressionLevel.NoCompression ); Compressor c2 = CodecPool.GetCompressor(codec, conf); // ensure same compressor placed earlier Assert.True("Got mismatched ZlibCompressor", c1 == c2); ByteArrayOutputStream bos = new ByteArrayOutputStream(); CompressionOutputStream cos = null; // write trivially compressable data byte[] b = new byte[1 << 15]; Arrays.Fill(b, unchecked ((byte)43)); try { cos = codec.CreateOutputStream(bos, c2); cos.Write(b); } finally { if (cos != null) { cos.Close(); } CodecPool.ReturnCompressor(c2); } byte[] outbytes = bos.ToByteArray(); // verify data were not compressed Assert.True("Compressed bytes contrary to configuration", outbytes .Length >= b.Length); }