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HBASE-1975 SingleColumnValueFilter: Add ability to match the value of previous versions of the specified column 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/hbase/trunk@835744 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2009-11-13 05:22:59 +00:00
parent d89e5f13b0
commit a6b7d95097
3 changed files with 45 additions and 9 deletions
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3
CHANGES.txt
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@ -182,6 +182,9 @@ Release 0.21.0 - Unreleased
a test and development environment (Wim Van Leuven via Stack)
HBASE-1963 Output to multiple tables from Hadoop MR without use of HTable
(Kevin Peterson via Andrew Purtell)
HBASE-1975 SingleColumnValueFilter: Add ability to match the value of
previous versions of the specified column
(Jeremiah Jacquet via Stack)
OPTIMIZATIONS
HBASE-410 [testing] Speed up the test suite

32
src/java/org/apache/hadoop/hbase/filter/SingleColumnValueFilter.java
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@ -48,10 +48,13 @@ import org.apache.hadoop.hbase.util.Bytes;
* <p>
* To prevent the entire row from being emitted if the column is not found
* on a row, use {@link #setFilterIfMissing}.
* <p>
* Otherwise, if the column is found, the entire row will be emitted only if
* the value passes. If the value fails, the row will be filtered out.
* <p>
* In order to test values of previous versions (timestamps), set
* {@link #setLatestVersionOnly} to false. The default is true, meaning that
* only the latest version's value is tested and all previous versions are ignored.
* <p>
* To filter based on the value of all scanned columns, use {@link ValueFilter}.
*/
public class SingleColumnValueFilter implements Filter {
@ -64,6 +67,7 @@ public class SingleColumnValueFilter implements Filter {
private boolean foundColumn = false;
private boolean matchedColumn = false;
private boolean filterIfMissing = false;
private boolean latestVersionOnly = true;
/**
* Writable constructor, do not use.
@ -120,7 +124,7 @@ public class SingleColumnValueFilter implements Filter {
if (this.matchedColumn) {
// We already found and matched the single column, all keys now pass
return ReturnCode.INCLUDE;
} else if (this.foundColumn) {
} else if (this.latestVersionOnly && this.foundColumn) {
// We found but did not match the single column, skip to next row
return ReturnCode.NEXT_ROW;
}
@ -130,7 +134,7 @@ public class SingleColumnValueFilter implements Filter {
foundColumn = true;
if (filterColumnValue(keyValue.getBuffer(),
keyValue.getValueOffset(), keyValue.getValueLength())) {
return ReturnCode.NEXT_ROW;
return this.latestVersionOnly? ReturnCode.NEXT_ROW: ReturnCode.INCLUDE;
}
this.matchedColumn = true;
return ReturnCode.INCLUDE;
@ -196,6 +200,26 @@ public class SingleColumnValueFilter implements Filter {
this.filterIfMissing = filterIfMissing;
}
/**
* Get whether only the latest version of the column value should be compared.
* If true, the row will be returned if only the latest version of the column
* value matches. If false, the row will be returned if any version of the
* column value matches. The default is true.
*/
public boolean getLatestVersionOnly() {
return latestVersionOnly;
}
/**
* Set whether only the latest version of the column value should be compared.
* If true, the row will be returned if only the latest version of the column
* value matches. If false, the row will be returned if any version of the
* column value matches. The default is true.
*/
public void setLatestVersionOnly(boolean latestVersionOnly) {
this.latestVersionOnly = latestVersionOnly;
}
public void readFields(final DataInput in) throws IOException {
this.columnFamily = Bytes.readByteArray(in);
if(this.columnFamily.length == 0) {
@ -211,6 +235,7 @@ public class SingleColumnValueFilter implements Filter {
this.foundColumn = in.readBoolean();
this.matchedColumn = in.readBoolean();
this.filterIfMissing = in.readBoolean();
this.latestVersionOnly = in.readBoolean();
}
public void write(final DataOutput out) throws IOException {
@ -222,5 +247,6 @@ public class SingleColumnValueFilter implements Filter {
out.writeBoolean(foundColumn);
out.writeBoolean(matchedColumn);
out.writeBoolean(filterIfMissing);
out.writeBoolean(latestVersionOnly);
}
}

13
src/test/org/apache/hadoop/hbase/filter/TestSingleColumnValueFilter.java
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@ -77,7 +77,7 @@ public class TestSingleColumnValueFilter extends TestCase {
new RegexStringComparator(QUICK_REGEX));
}
private void basicFilterTests(Filter filter)
private void basicFilterTests(SingleColumnValueFilter filter)
throws Exception {
KeyValue kv = new KeyValue(ROW, COLUMN_FAMILY, COLUMN_QUALIFIER, VAL_2);
assertTrue("basicFilter1", filter.filterKeyValue(kv) == Filter.ReturnCode.INCLUDE);
@ -93,6 +93,13 @@ public class TestSingleColumnValueFilter extends TestCase {
assertTrue("basicFilter4", filter.filterKeyValue(kv) == Filter.ReturnCode.NEXT_ROW);
assertFalse("basicFilterAllRemaining", filter.filterAllRemaining());
assertTrue("basicFilterNotNull", filter.filterRow());
filter.reset();
filter.setLatestVersionOnly(false);
kv = new KeyValue(ROW, COLUMN_FAMILY, COLUMN_QUALIFIER, VAL_1);
assertTrue("basicFilter5", filter.filterKeyValue(kv) == Filter.ReturnCode.INCLUDE);
kv = new KeyValue(ROW, COLUMN_FAMILY, COLUMN_QUALIFIER, VAL_2);
assertTrue("basicFilter5", filter.filterKeyValue(kv) == Filter.ReturnCode.INCLUDE);
assertFalse("basicFilterNotNull", filter.filterRow());
}
private void substrFilterTests(Filter filter)
@ -144,7 +151,7 @@ public class TestSingleColumnValueFilter extends TestCase {
* @throws Exception
*/
public void testStop() throws Exception {
basicFilterTests(basicFilter);
basicFilterTests((SingleColumnValueFilter)basicFilter);
substrFilterTests(substrFilter);
regexFilterTests(regexFilter);
}
@ -155,7 +162,7 @@ public class TestSingleColumnValueFilter extends TestCase {
*/
public void testSerialization() throws Exception {
Filter newFilter = serializationTest(basicFilter);
basicFilterTests(newFilter);
basicFilterTests((SingleColumnValueFilter)newFilter);
newFilter = serializationTest(substrFilter);
substrFilterTests(newFilter);
newFilter = serializationTest(regexFilter);