/** Test <code>long skip(long len)</code>. */
@Test
public void skipTest() throws IOException, TachyonException {
String uniqPath = PathUtils.uniqPath();
for (int k = MIN_LEN + DELTA; k <= MAX_LEN; k += DELTA) {
TachyonFile f =
TachyonFSTestUtils.createByteFile(mTfs, uniqPath + "/file_" + k, k, mWriteUnderStore);
FileInStream is = mTfs.getInStream(f, mReadCache);
Assert.assertEquals(k / 2, is.skip(k / 2));
Assert.assertEquals(k / 2, is.read());
is.close();
Assert.assertFalse(mTfs.getInfo(f).getInMemoryPercentage() == 100);
if (k >= 3) {
is = mTfs.getInStream(f, mReadCache);
int t = k / 3;
Assert.assertEquals(t, is.skip(t));
Assert.assertEquals(t, is.read());
Assert.assertEquals(t, is.skip(t));
Assert.assertEquals(2 * t + 1, is.read());
is.close();
Assert.assertFalse(mTfs.getInfo(f).getInMemoryPercentage() == 100);
}
}
}
/** Test {@link tachyon.client.block.BufferedBlockInStream#skip(long)}. */
@Test
public void skipTest() throws IOException, TachyonException {
for (int k = MIN_LEN + DELTA; k <= MAX_LEN; k += DELTA) {
for (CreateFileOptions op : getOptionSet()) {
TachyonURI path = new TachyonURI(sTestPath + "/file_" + k + "_" + op.hashCode());
FileInStream is = sFileSystem.openFile(path, FileSystemTestUtils.toOpenFileOptions(op));
Assert.assertEquals(k / 2, is.skip(k / 2));
Assert.assertEquals(k / 2, is.read());
is.close();
is = sFileSystem.openFile(path, FileSystemTestUtils.toOpenFileOptions(op));
int t = k / 3;
Assert.assertEquals(t, is.skip(t));
Assert.assertEquals(t, is.read());
Assert.assertEquals(t, is.skip(t));
Assert.assertEquals(2 * t + 1, is.read());
is.close();
}
}
}
/**
* Prints the file's last 1KB of contents to the console.
*
* @param path The TachyonURI path as the input of the command
* @return 0 if command is successful, -1 if an error occurred.f
* @throws IOException
*/
public int tail(TachyonURI path) throws IOException {
TachyonFile fd;
FileInfo fInfo;
try {
fd = mTfs.open(path);
if (fd == null) {
System.out.println(ExceptionMessage.PATH_DOES_NOT_EXIST.getMessage(path));
return -1;
}
fInfo = mTfs.getInfo(fd);
} catch (TachyonException e) {
throw new IOException(e);
}
if (!fInfo.isFolder) {
InStreamOptions op =
new InStreamOptions.Builder(mTachyonConf)
.setTachyonStorageType(TachyonStorageType.NO_STORE)
.build();
FileInStream is = null;
try {
is = mTfs.getInStream(fd, op);
byte[] buf = new byte[Constants.KB];
long bytesToRead = 0L;
if (fInfo.getLength() > Constants.KB) {
bytesToRead = Constants.KB;
} else {
bytesToRead = fInfo.getLength();
}
is.skip(fInfo.getLength() - bytesToRead);
int read = is.read(buf);
if (read != -1) {
System.out.write(buf, 0, read);
}
return 0;
} catch (TachyonException e) {
throw new IOException(e);
} finally {
is.close();
}
} else {
System.out.println(path + " is not a file.");
return -1;
}
}
