本文整理匯總了Java中org.apache.hadoop.io.SequenceFile.Writer.compression方法的典型用法代碼示例。如果您正苦於以下問題：Java Writer.compression方法的具體用法？Java Writer.compression怎麽用？Java Writer.compression使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類org.apache.hadoop.io.SequenceFile.Writer的用法示例。
在下文中一共展示了Writer.compression方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: testAppendRecordCompression
import org.apache.hadoop.io.SequenceFile.Writer; //導入方法依賴的package包/類
@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);
}
示例2: testAppendSort
import org.apache.hadoop.io.SequenceFile.Writer; //導入方法依賴的package包/類
@Test(timeout = 30000)
public void testAppendSort() throws Exception {
GenericTestUtils.assumeInNativeProfile();
Path file = new Path(ROOT_PATH, "testseqappendSort.seq");
fs.delete(file, true);
Path sortedFile = new Path(ROOT_PATH, "testseqappendSort.seq.sort");
fs.delete(sortedFile, true);
SequenceFile.Sorter sorter = new SequenceFile.Sorter(fs,
new JavaSerializationComparator<Long>(), Long.class, String.class, conf);
Option compressOption = Writer.compression(CompressionType.BLOCK,
new GzipCodec());
Writer writer = SequenceFile.createWriter(conf,
SequenceFile.Writer.file(file),
SequenceFile.Writer.keyClass(Long.class),
SequenceFile.Writer.valueClass(String.class), compressOption);
writer.append(2L, "two");
writer.append(1L, "one");
writer.close();
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(4L, "four");
writer.append(3L, "three");
writer.close();
// Sort file after append
sorter.sort(file, sortedFile);
verifyAll4Values(sortedFile);
fs.deleteOnExit(file);
fs.deleteOnExit(sortedFile);
}