TestSequenceFileAppend.java 文件源码

@Test(timeout = 30000)
public void testAppendRecordCompression() throws Exception {
  GenericTestUtils.assumeInNativeProfile();

  Path file = new Path(ROOT_PATH, "testseqappendblockcompr.seq");
  fs.delete(file, true);

  Option compressOption = Writer.compression(CompressionType.RECORD,
      new GzipCodec());
  Writer writer = SequenceFile.createWriter(conf,
      SequenceFile.Writer.file(file),
      SequenceFile.Writer.keyClass(Long.class),
      SequenceFile.Writer.valueClass(String.class), compressOption);

  writer.append(1L, "one");
  writer.append(2L, "two");
  writer.close();

  verify2Values(file);

  writer = SequenceFile.createWriter(conf, SequenceFile.Writer.file(file),
      SequenceFile.Writer.keyClass(Long.class),
      SequenceFile.Writer.valueClass(String.class),
      SequenceFile.Writer.appendIfExists(true), compressOption);

  writer.append(3L, "three");
  writer.append(4L, "four");
  writer.close();

  verifyAll4Values(file);

  fs.deleteOnExit(file);
}