Package org.apache.hadoop.hbase.io

Class TestHalfStoreFileReader

java.lang.Object

org.apache.hadoop.hbase.io.TestHalfStoreFileReader

public class TestHalfStoreFileReader
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final HBaseClassTestRule	CLASS_RULE
(package private) static final int	SIZE
private static HBaseTestingUtil	TEST_UTIL

Constructor Summary

Constructors

Constructor	Description
TestHalfStoreFileReader()

Method Summary

Modifier and Type	Method	Description
(package private) static byte[]	_b(String s)
private void	doTestOfScanAndReseek(org.apache.hadoop.fs.Path p, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.hbase.io.Reference bottom, org.apache.hadoop.hbase.io.hfile.CacheConfig cacheConf)
private org.apache.hadoop.hbase.Cell	doTestOfSeekBefore(org.apache.hadoop.fs.Path p, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.hbase.io.Reference bottom, org.apache.hadoop.hbase.ExtendedCell seekBefore, org.apache.hadoop.hbase.io.hfile.CacheConfig cacheConfig)
(package private) List<org.apache.hadoop.hbase.KeyValue>	genSomeKeys()
private org.apache.hadoop.hbase.KeyValue	getLastOnCol(org.apache.hadoop.hbase.Cell curr)
static void	setupBeforeClass()
static void	tearDownAfterClass()
void	testHalfScanAndReseek()	Test the scanner and reseek of a half hfile scanner.
void	testHalfScanner()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

CLASS_RULE

public static final HBaseClassTestRule CLASS_RULE

TEST_UTIL

private static HBaseTestingUtil TEST_UTIL

SIZE

static final int SIZE

See Also:

• Constant Field Values

Constructor Details

TestHalfStoreFileReader

public TestHalfStoreFileReader()

Method Details

setupBeforeClass

public static void setupBeforeClass()
                             throws Exception

Throws:

Exception

tearDownAfterClass

public static void tearDownAfterClass()
                               throws Exception

Throws:

Exception

testHalfScanAndReseek

public void testHalfScanAndReseek()
                           throws Exception

Test the scanner and reseek of a half hfile scanner. The scanner API demands that seekTo and reseekTo() only return < 0 if the key lies before the start of the file (with no position on the scanner). Returning 0 if perfect match (rare), and return > 1 if we got an imperfect match. The latter case being the most common, we should generally be returning 1, and if we do, there may or may not be a 'next' in the scanner/file. A bug in the half file scanner was returning -1 at the end of the bottom half, and that was causing the infrastructure above to go null causing NPEs and other problems. This test reproduces that failure, and also tests both the bottom and top of the file while we are at it.

Throws:

Exception

doTestOfScanAndReseek

private void doTestOfScanAndReseek(org.apache.hadoop.fs.Path p,
 org.apache.hadoop.fs.FileSystem fs,
 org.apache.hadoop.hbase.io.Reference bottom,
 org.apache.hadoop.hbase.io.hfile.CacheConfig cacheConf)
                            throws Exception

Throws:

Exception

testHalfScanner

public void testHalfScanner()
                     throws IOException

Throws:

IOException

doTestOfSeekBefore

private org.apache.hadoop.hbase.Cell doTestOfSeekBefore(org.apache.hadoop.fs.Path p,
 org.apache.hadoop.fs.FileSystem fs,
 org.apache.hadoop.hbase.io.Reference bottom,
 org.apache.hadoop.hbase.ExtendedCell seekBefore,
 org.apache.hadoop.hbase.io.hfile.CacheConfig cacheConfig)
                                                 throws IOException

Throws:

IOException

getLastOnCol

private org.apache.hadoop.hbase.KeyValue getLastOnCol(org.apache.hadoop.hbase.Cell curr)

_b

static byte[] _b(String s)

genSomeKeys

List<org.apache.hadoop.hbase.KeyValue> genSomeKeys()