本文整理匯總了Java中org.apache.hadoop.fs.FSDataInputStream.readLong方法的典型用法代碼示例。如果您正苦於以下問題：Java FSDataInputStream.readLong方法的具體用法？Java FSDataInputStream.readLong怎麽用？Java FSDataInputStream.readLong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.fs.FSDataInputStream的用法示例。
在下文中一共展示了FSDataInputStream.readLong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: Reader
import org.apache.hadoop.fs.FSDataInputStream; //導入方法依賴的package包/類
/**
* Constructor
*
* @param fin
* FS input stream.
* @param fileLength
* Length of the corresponding file
* @throws IOException
*/
public Reader(FSDataInputStream fin, long fileLength, Configuration conf)
throws IOException {
this.in = fin;
this.conf = conf;
// move the cursor to the beginning of the tail, containing: offset to the
// meta block index, version and magic
fin.seek(fileLength - Magic.size() - Version.size() - Long.SIZE
/ Byte.SIZE);
long offsetIndexMeta = fin.readLong();
version = new Version(fin);
Magic.readAndVerify(fin);
if (!version.compatibleWith(BCFile.API_VERSION)) {
throw new RuntimeException("Incompatible BCFile fileBCFileVersion.");
}
// read meta index
fin.seek(offsetIndexMeta);
metaIndex = new MetaIndex(fin);
// read data:BCFile.index, the data block index
BlockReader blockR = getMetaBlock(DataIndex.BLOCK_NAME);
try {
dataIndex = new DataIndex(blockR);
} finally {
blockR.close();
}
}
示例2: SpillRecord
import org.apache.hadoop.fs.FSDataInputStream; //導入方法依賴的package包/類
public SpillRecord(Path indexFileName, JobConf job, Checksum crc,
String expectedIndexOwner)
throws IOException {
final FileSystem rfs = FileSystem.getLocal(job).getRaw();
final FSDataInputStream in =
SecureIOUtils.openFSDataInputStream(new File(indexFileName.toUri()
.getRawPath()), expectedIndexOwner, null);
try {
final long length = rfs.getFileStatus(indexFileName).getLen();
final int partitions = (int) length / MAP_OUTPUT_INDEX_RECORD_LENGTH;
final int size = partitions * MAP_OUTPUT_INDEX_RECORD_LENGTH;
buf = ByteBuffer.allocate(size);
if (crc != null) {
crc.reset();
CheckedInputStream chk = new CheckedInputStream(in, crc);
IOUtils.readFully(chk, buf.array(), 0, size);
if (chk.getChecksum().getValue() != in.readLong()) {
throw new ChecksumException("Checksum error reading spill index: " +
indexFileName, -1);
}
} else {
IOUtils.readFully(in, buf.array(), 0, size);
}
entries = buf.asLongBuffer();
} finally {
in.close();
}
}