Apache
/
hbase
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

HBASE-1106 Expose getClosestRowBefore in HTable 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/hbase/trunk@731178 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2009-01-04 05:07:11 +00:00
parent 491991061e
commit fe345b23bc
3 changed files with 68 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
CHANGES.txt
View File

@ -202,6 +202,8 @@ Release 0.19.0 - Unreleased
HBASE-1062 Compactions at (re)start on a large table can overwhelm DFS
HBASE-1102 boolean HTable.exists()
HBASE-1105 Remove duplicated code in HCM, add javadoc to RegionState, etc.
HBASE-1106 Expose getClosestRowBefore in HTable
(Michael Gottesman via Stack)
NEW FEATURES
HBASE-875 Use MurmurHash instead of JenkinsHash [in bloomfilters]

13
src/java/org/apache/hadoop/hbase/client/HTable.java
View File

@ -618,6 +618,19 @@ public class HTable {
);
}
public RowResult getClosestRowBefore(final byte[] row, final byte[] columnFamily)
throws IOException {
return connection.getRegionServerWithRetries(
new ServerCallable<RowResult>(connection,tableName,row) {
public RowResult call() throws IOException {
return server.getClosestRowBefore(
location.getRegionInfo().getRegionName(), row, columnFamily
);
}
}
);
}
/**
* Get a scanner on the current table starting at first row.
* Return the specified columns.

53
src/test/org/apache/hadoop/hbase/client/TestHTable.java
View File

@ -259,4 +259,57 @@ public class TestHTable extends HBaseClusterTestCase implements HConstants {
}
}
public void testGetClosestRowBefore() throws IOException {
HColumnDescriptor column2 =
new HColumnDescriptor(Bytes.toBytes("info2:"));
HBaseAdmin admin = new HBaseAdmin(conf);
HTableDescriptor testTableADesc =
new HTableDescriptor(tableAname);
testTableADesc.addFamily(column);
testTableADesc.addFamily(column2);
admin.createTable(testTableADesc);
byte[] firstRow = Bytes.toBytes("ro");
byte[] beforeFirstRow = Bytes.toBytes("rn");
byte[] beforeSecondRow = Bytes.toBytes("rov");
HTable table = new HTable(conf, tableAname);
BatchUpdate batchUpdate = new BatchUpdate(firstRow);
BatchUpdate batchUpdate2 = new BatchUpdate(row);
byte[] zero = new byte[]{0};
byte[] one = new byte[]{1};
byte[] columnFamilyBytes = Bytes.toBytes(COLUMN_FAMILY_STR);
batchUpdate.put(COLUMN_FAMILY_STR,zero);
batchUpdate2.put(COLUMN_FAMILY_STR,one);
table.commit(batchUpdate);
table.commit(batchUpdate2);
RowResult result = null;
// Test before first that null is returned
result = table.getClosestRowBefore(beforeFirstRow, columnFamilyBytes);
assertTrue(result == null);
// Test at first that first is returned
result = table.getClosestRowBefore(firstRow, columnFamilyBytes);
assertTrue(result.containsKey(COLUMN_FAMILY_STR));
assertTrue(Bytes.equals(result.get(COLUMN_FAMILY_STR).getValue(), zero));
// Test inbetween first and second that first is returned
result = table.getClosestRowBefore(beforeSecondRow, columnFamilyBytes);
assertTrue(result.containsKey(COLUMN_FAMILY_STR));
assertTrue(Bytes.equals(result.get(COLUMN_FAMILY_STR).getValue(), zero));
// Test at second make sure second is returned
result = table.getClosestRowBefore(row, columnFamilyBytes);
assertTrue(result.containsKey(COLUMN_FAMILY_STR));
assertTrue(Bytes.equals(result.get(COLUMN_FAMILY_STR).getValue(), one));
// Test after second, make sure second is returned
result = table.getClosestRowBefore(Bytes.add(row,one), columnFamilyBytes);
assertTrue(result.containsKey(COLUMN_FAMILY_STR));
assertTrue(Bytes.equals(result.get(COLUMN_FAMILY_STR).getValue(), one));
}
}