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java.lang.Objectorg.apache.hadoop.hbase.util.RegionSplitter.HexStringSplit
public static class RegionSplitter.HexStringSplit
HexStringSplit is a well-known RegionSplitter.SplitAlgorithm for choosing region
boundaries. The format of a HexStringSplit region boundary is the ASCII
representation of an MD5 checksum, or any other uniformly distributed
hexadecimal value. Row are hex-encoded long values in the range
"00000000" => "FFFFFFFF" and are left-padded with zeros to keep the
same order lexicographically as if they were binary.
Since this split algorithm uses hex strings as keys, it is easy to read &
write in the shell but takes up more space and may be non-intuitive.
| Constructor Summary | |
|---|---|
RegionSplitter.HexStringSplit()
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| Method Summary | |
|---|---|
BigInteger |
convertToBigInteger(byte[] row)
Returns the BigInteger represented by the byte array |
byte[] |
convertToByte(BigInteger bigInteger)
Returns the bytes corresponding to the BigInteger |
static byte[] |
convertToByte(BigInteger bigInteger,
int pad)
Returns the bytes corresponding to the BigInteger |
byte[][] |
convertToBytes(BigInteger[] bigIntegers)
Returns an array of bytes corresponding to an array of BigIntegers |
byte[] |
firstRow()
In HBase, the first row is represented by an empty byte array. |
byte[] |
lastRow()
In HBase, the last row is represented by an empty byte array. |
String |
rowToStr(byte[] row)
|
String |
separator()
|
void |
setFirstRow(byte[] userInput)
Set the first row |
void |
setFirstRow(String userInput)
In HBase, the last row is represented by an empty byte array. |
void |
setLastRow(byte[] userInput)
Set the last row |
void |
setLastRow(String userInput)
In HBase, the last row is represented by an empty byte array. |
byte[] |
split(byte[] start,
byte[] end)
Split a pre-existing region into 2 regions. |
byte[][] |
split(int n)
Split an entire table. |
BigInteger |
split2(BigInteger a,
BigInteger b)
Divide 2 numbers in half (for split algorithm) |
byte[] |
strToRow(String in)
|
String |
toString()
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| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
public RegionSplitter.HexStringSplit()
| Method Detail |
|---|
public byte[] split(byte[] start,
byte[] end)
RegionSplitter.SplitAlgorithm
split in interface RegionSplitter.SplitAlgorithmstart - first row (inclusive)end - last row (exclusive)
public byte[][] split(int n)
RegionSplitter.SplitAlgorithm
split in interface RegionSplitter.SplitAlgorithmn - number of regions to split the table into
public byte[] firstRow()
RegionSplitter.SplitAlgorithm
firstRow in interface RegionSplitter.SplitAlgorithmpublic byte[] lastRow()
RegionSplitter.SplitAlgorithm
lastRow in interface RegionSplitter.SplitAlgorithmpublic void setFirstRow(String userInput)
RegionSplitter.SplitAlgorithm
setFirstRow in interface RegionSplitter.SplitAlgorithmuserInput - raw user input (may throw RuntimeException on parse failure)public void setLastRow(String userInput)
RegionSplitter.SplitAlgorithm
setLastRow in interface RegionSplitter.SplitAlgorithmuserInput - raw user input (may throw RuntimeException on parse failure)public byte[] strToRow(String in)
strToRow in interface RegionSplitter.SplitAlgorithmin - user or file input for row
public String rowToStr(byte[] row)
rowToStr in interface RegionSplitter.SplitAlgorithmrow - byte array representing a row in HBase
public String separator()
separator in interface RegionSplitter.SplitAlgorithmpublic void setFirstRow(byte[] userInput)
RegionSplitter.SplitAlgorithm
setFirstRow in interface RegionSplitter.SplitAlgorithmuserInput - byte array of the row key.public void setLastRow(byte[] userInput)
RegionSplitter.SplitAlgorithm
setLastRow in interface RegionSplitter.SplitAlgorithmuserInput - byte array of the row key.
public BigInteger split2(BigInteger a,
BigInteger b)
a - number #1b - number #2
public byte[][] convertToBytes(BigInteger[] bigIntegers)
bigIntegers - numbers to convert
public static byte[] convertToByte(BigInteger bigInteger,
int pad)
bigInteger - number to convertpad - padding length
public byte[] convertToByte(BigInteger bigInteger)
bigInteger - number to convert
public BigInteger convertToBigInteger(byte[] row)
row - byte array representing row
public String toString()
toString in class Object
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