HBASE-841 Consolidate multiple overloaded methods in HRegionInterface, HRegionServer (Jean-Daniel Cryans via Jim Kellerman)
git-svn-id: https://svn.apache.org/repos/asf/hadoop/hbase/trunk@689162 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
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90685d499c
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@ -48,6 +48,8 @@ Release 0.18.0 - Unreleased
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(Sishen Freecity via Stack)
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HBASE-830 Debugging HCM.locateRegionInMeta is painful
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HBASE-784 Base hbase-0.3.0 on hadoop-0.18
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HBASE-841 Consolidate multiple overloaded methods in HRegionInterface,
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HRegionServer (Jean-Daniel Cryans via Jim Kellerman)
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NEW FEATURES
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HBASE-787 Postgresql to HBase table replication example (Tim Sell via Stack)
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@ -386,8 +386,9 @@ public class HTable {
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return connection.getRegionServerWithRetries(
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new ServerCallable<Cell>(connection, tableName, row) {
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public Cell call() throws IOException {
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return server.get(location.getRegionInfo().getRegionName(), row,
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column);
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Cell[] result = server.get(location.getRegionInfo().getRegionName(),
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row, column, -1, -1);
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return (result == null)? null : result[0];
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}
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}
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);
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@ -408,7 +409,7 @@ public class HTable {
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new ServerCallable<Cell[]>(connection, tableName, row) {
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public Cell[] call() throws IOException {
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return server.get(location.getRegionInfo().getRegionName(), row,
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column, numVersions);
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column, -1, numVersions);
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}
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}
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);
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@ -49,33 +49,6 @@ public interface HRegionInterface extends VersionedProtocol {
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*/
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public HRegionInfo getRegionInfo(final byte [] regionName)
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throws NotServingRegionException;
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/**
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* Retrieve a single value from the specified region for the specified row
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* and column keys
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*
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* @param regionName name of region
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* @param row row key
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* @param column column key
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* @return alue for that region/row/column
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* @throws IOException
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*/
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public Cell get(final byte [] regionName, final byte [] row, final byte [] column)
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throws IOException;
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/**
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* Get the specified number of versions of the specified row and column
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*
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* @param regionName region name
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* @param row row key
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* @param column column key
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* @param numVersions number of versions to return
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* @return array of values
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* @throws IOException
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*/
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public Cell[] get(final byte [] regionName, final byte [] row,
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final byte [] column, final int numVersions)
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throws IOException;
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/**
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* Get the specified number of versions of the specified row and column with
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@ -1118,31 +1118,6 @@ public class HRegion implements HConstants {
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// get() methods for client use.
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//////////////////////////////////////////////////////////////////////////////
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/**
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* Fetch a single data item.
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* @param row
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* @param column
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* @return column value
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* @throws IOException
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*/
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public Cell get(byte [] row, byte [] column) throws IOException {
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Cell[] results = get(row, column, Long.MAX_VALUE, 1);
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return (results == null || results.length == 0)? null: results[0];
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}
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/**
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* Fetch multiple versions of a single data item
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*
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* @param row
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* @param column
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* @param numVersions
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* @return array of values one element per version
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* @throws IOException
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*/
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public Cell[] get(byte [] row, byte [] column, int numVersions)
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throws IOException {
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return get(row, column, Long.MAX_VALUE, numVersions);
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}
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/**
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* Fetch multiple versions of a single data item, with timestamp.
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*
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@ -1150,12 +1125,20 @@ public class HRegion implements HConstants {
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* @param column
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* @param timestamp
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* @param numVersions
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* @return array of values one element per version that matches the timestamp
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* @return array of values one element per version that matches the timestamp,
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* or null if there are no matches.
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* @throws IOException
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*/
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public Cell[] get(byte [] row, byte [] column, long timestamp,
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int numVersions)
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throws IOException {
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if (timestamp == -1) {
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timestamp = Long.MAX_VALUE;
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}
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if (numVersions == -1) {
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numVersions = 1;
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}
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splitsAndClosesLock.readLock().lock();
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try {
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if (this.closed.get()) {
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@ -1166,7 +1149,10 @@ public class HRegion implements HConstants {
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checkColumn(column);
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// Don't need a row lock for a simple get
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HStoreKey key = new HStoreKey(row, column, timestamp);
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return getStore(column).get(key, numVersions);
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Cell[] result = getStore(column).get(key, numVersions);
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// Guarantee that we return null instead of a zero-length array,
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// if there are no results to return.
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return (result == null || result.length == 0)? null : result;
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} finally {
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splitsAndClosesLock.readLock().unlock();
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}
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@ -1007,34 +1007,6 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
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return getRegion(regionName).getRegionInfo();
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}
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/** {@inheritDoc} */
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public Cell get(final byte [] regionName, final byte [] row,
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final byte [] column)
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throws IOException {
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checkOpen();
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requestCount.incrementAndGet();
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try {
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return getRegion(regionName).get(row, column);
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} catch (IOException e) {
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checkFileSystem();
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throw e;
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}
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}
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/** {@inheritDoc} */
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public Cell[] get(final byte [] regionName, final byte [] row,
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final byte [] column, final int numVersions)
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throws IOException {
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checkOpen();
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requestCount.incrementAndGet();
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try {
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return getRegion(regionName).get(row, column, numVersions);
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} catch (IOException e) {
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checkFileSystem();
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throw e;
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}
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}
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/** {@inheritDoc} */
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public Cell[] get(final byte [] regionName, final byte [] row,
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final byte [] column, final long timestamp, final int numVersions)
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@ -33,6 +33,7 @@ import org.apache.hadoop.util.Tool;
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import org.apache.hadoop.util.ToolRunner;
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import org.apache.hadoop.hbase.client.HBaseAdmin;
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import org.apache.hadoop.hbase.io.Cell;
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import org.apache.hadoop.hbase.HBaseConfiguration;
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import org.apache.hadoop.hbase.HConstants;
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import org.apache.hadoop.hbase.regionserver.HLog;
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@ -140,10 +141,10 @@ public class Merge extends Configured implements Tool {
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*/
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private void mergeTwoMetaRegions() throws IOException {
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HRegion rootRegion = utils.getRootRegion();
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HRegionInfo info1 = Writables.getHRegionInfo(
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rootRegion.get(region1, HConstants.COL_REGIONINFO));
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HRegionInfo info2 = Writables.getHRegionInfo(
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rootRegion.get(region2, HConstants.COL_REGIONINFO));
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Cell[] cells1 = rootRegion.get(region1, HConstants.COL_REGIONINFO, -1, -1);
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HRegionInfo info1 = Writables.getHRegionInfo((cells1 == null)? null : cells1[0]);
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Cell[] cells2 = rootRegion.get(region2, HConstants.COL_REGIONINFO, -1, -1);
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HRegionInfo info2 = Writables.getHRegionInfo((cells2 == null)? null : cells2[0]);
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HRegion merged = merge(info1, rootRegion, info2, rootRegion);
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LOG.info("Adding " + merged.getRegionInfo() + " to " +
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rootRegion.getRegionInfo());
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@ -205,8 +206,8 @@ public class Merge extends Configured implements Tool {
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LOG.info("Found meta for region1 " + meta1.getRegionName() +
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", meta for region2 " + meta2.getRegionName());
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HRegion metaRegion1 = this.utils.getMetaRegion(meta1);
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HRegionInfo info1 = Writables.getHRegionInfo(
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metaRegion1.get(region1, HConstants.COL_REGIONINFO));
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Cell[] cells1 = metaRegion1.get(region1, HConstants.COL_REGIONINFO, -1, -1);
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HRegionInfo info1 = Writables.getHRegionInfo((cells1 == null)? null : cells1[0]);
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if (info1== null) {
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throw new NullPointerException("info1 is null using key " + region1 +
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" in " + meta1);
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@ -218,8 +219,8 @@ public class Merge extends Configured implements Tool {
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} else {
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metaRegion2 = utils.getMetaRegion(meta2);
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}
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HRegionInfo info2 = Writables.getHRegionInfo(
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metaRegion2.get(region2, HConstants.COL_REGIONINFO));
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Cell[] cells2 = metaRegion2.get(region2, HConstants.COL_REGIONINFO, -1, -1);
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HRegionInfo info2 = Writables.getHRegionInfo((cells2 == null)? null : cells2[0]);
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if (info2 == null) {
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throw new NullPointerException("info2 is null using key " + meta2);
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}
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@ -400,7 +400,7 @@ public class MetaUtils {
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throws IOException {
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if (LOG.isDebugEnabled()) {
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HRegionInfo h = Writables.getHRegionInfoOrNull(
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r.get(hri.getRegionName(), HConstants.COL_REGIONINFO).getValue());
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r.get(hri.getRegionName(), HConstants.COL_REGIONINFO, -1, -1)[0].getValue());
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LOG.debug("Old " + Bytes.toString(HConstants.COL_REGIONINFO) +
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" for " + hri.toString() + " in " + r.toString() + " is: " +
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h.toString());
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@ -410,7 +410,7 @@ public class MetaUtils {
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r.batchUpdate(b, null);
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if (LOG.isDebugEnabled()) {
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HRegionInfo h = Writables.getHRegionInfoOrNull(
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r.get(hri.getRegionName(), HConstants.COL_REGIONINFO).getValue());
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r.get(hri.getRegionName(), HConstants.COL_REGIONINFO, -1, -1)[0].getValue());
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LOG.debug("New " + Bytes.toString(HConstants.COL_REGIONINFO) +
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" for " + hri.toString() + " in " + r.toString() + " is: " +
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h.toString());
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@ -422,13 +422,14 @@ public abstract class HBaseTestCase extends TestCase {
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/** {@inheritDoc} */
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public Cell get(byte [] row, byte [] column) throws IOException {
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return this.region.get(row, column);
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Cell[] result = this.region.get(row, column, -1, -1);
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return (result == null)? null : result[0];
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}
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/** {@inheritDoc} */
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public Cell[] get(byte [] row, byte [] column, int versions)
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throws IOException {
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return this.region.get(row, column, versions);
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return this.region.get(row, column, -1, versions);
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}
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/** {@inheritDoc} */
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@ -100,7 +100,7 @@ public class TestCompaction extends HBaseTestCase {
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// available.
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addContent(new HRegionIncommon(r), Bytes.toString(COLUMN_FAMILY));
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Cell[] cellValues =
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r.get(STARTROW, COLUMN_FAMILY_TEXT, 100 /*Too many*/);
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r.get(STARTROW, COLUMN_FAMILY_TEXT, -1, 100 /*Too many*/);
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// Assert that I can get 3 versions since it is the max I should get
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assertTrue(cellValues.length == 3);
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r.flushcache();
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@ -114,7 +114,7 @@ public class TestCompaction extends HBaseTestCase {
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byte [] secondRowBytes = START_KEY.getBytes(HConstants.UTF8_ENCODING);
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// Increment the least significant character so we get to next row.
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secondRowBytes[START_KEY_BYTES.length - 1]++;
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cellValues = r.get(secondRowBytes, COLUMN_FAMILY_TEXT, 100/*Too many*/);
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cellValues = r.get(secondRowBytes, COLUMN_FAMILY_TEXT, -1, 100/*Too many*/);
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LOG.info("Count of " + Bytes.toString(secondRowBytes) + ": " + cellValues.length);
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// Commented out because fails on an hp+ubuntu single-processor w/ 1G and
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// "Intel(R) Pentium(R) 4 CPU 3.20GHz" though passes on all local
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// Now, before compacting, remove all instances of the first row so can
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// verify that it is removed as we compact.
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// Assert all delted.
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assertNull(r.get(STARTROW, COLUMN_FAMILY_TEXT, 100 /*Too many*/));
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assertNull(r.get(STARTROW, COLUMN_FAMILY_TEXT, -1, 100 /*Too many*/));
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r.flushcache();
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assertEquals(r.getStore(COLUMN_FAMILY_TEXT).getStorefiles().size(), 2);
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assertNull(r.get(STARTROW, COLUMN_FAMILY_TEXT, 100 /*Too many*/));
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assertNull(r.get(STARTROW, COLUMN_FAMILY_TEXT, -1, 100 /*Too many*/));
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// Add a bit of data and flush it so we for sure have the compaction limit
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// for store files. Usually by this time we will have but if compaction
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// included the flush that ran 'concurrently', there may be just the
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@ -146,7 +146,7 @@ public class TestCompaction extends HBaseTestCase {
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r.compactStores();
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assertEquals(r.getStore(COLUMN_FAMILY_TEXT).getStorefiles().size(), 2);
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// Assert that the first row is still deleted.
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cellValues = r.get(STARTROW, COLUMN_FAMILY_TEXT, 100 /*Too many*/);
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cellValues = r.get(STARTROW, COLUMN_FAMILY_TEXT, -1, 100 /*Too many*/);
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assertNull(cellValues);
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// Make sure the store files do have some 'aaa' keys in them.
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boolean containsStartRow = false;
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@ -82,11 +82,11 @@ public class TestGet2 extends HBaseTestCase implements HConstants {
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// Now delete all then retry
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region.deleteAll(Bytes.toBytes(T00), System.currentTimeMillis(), null);
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Cell [] cells = region.get(Bytes.toBytes(T00), column,
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Cell [] cells = region.get(Bytes.toBytes(T00), column, -1,
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HColumnDescriptor.DEFAULT_VERSIONS);
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assertTrue(cells == null);
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region.flushcache();
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cells = region.get(Bytes.toBytes(T00), column,
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cells = region.get(Bytes.toBytes(T00), column, -1,
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HColumnDescriptor.DEFAULT_VERSIONS);
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assertTrue(cells == null);
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@ -123,11 +123,11 @@ public class TestGet2 extends HBaseTestCase implements HConstants {
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final byte [] column)
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throws IOException {
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byte [] r = Bytes.toBytes(row);
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Cell [] cells = region.get(r, column, 100);
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Cell [] cells = region.get(r, column, -1, 100);
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assertTrue(cells.length == HColumnDescriptor.DEFAULT_VERSIONS);
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cells = region.get(r, column, 1);
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cells = region.get(r, column, -1, 1);
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assertTrue(cells.length == 1);
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cells = region.get(r, column, HConstants.ALL_VERSIONS);
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cells = region.get(r, column, -1, HConstants.ALL_VERSIONS);
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assertTrue(cells.length == HColumnDescriptor.DEFAULT_VERSIONS);
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}
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@ -215,7 +215,7 @@ public class TestSplit extends HBaseClusterTestCase {
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private void assertGet(final HRegion r, final byte [] family, final byte [] k)
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throws IOException {
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// Now I have k, get values out and assert they are as expected.
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Cell[] results = r.get(k, family, Integer.MAX_VALUE);
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Cell[] results = r.get(k, family, -1, Integer.MAX_VALUE);
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for (int j = 0; j < results.length; j++) {
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byte [] tmp = results[j].getValue();
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// Row should be equal to value every time.
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@ -179,7 +179,7 @@ public class TestMergeTool extends HBaseTestCase {
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throws IOException {
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for (int i = 0; i < upperbound; i++) {
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for (int j = 0; j < rows[i].length; j++) {
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byte[] bytes = merged.get(rows[i][j], COLUMN_NAME).getValue();
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byte[] bytes = merged.get(rows[i][j], COLUMN_NAME, -1, -1)[0].getValue();
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assertNotNull(rows[i][j].toString(), bytes);
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assertTrue(Bytes.equals(bytes, rows[i][j]));
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}
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@ -195,7 +195,7 @@ public class TestMergeTool extends HBaseTestCase {
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// contain the right data.
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for (int i = 0; i < regions.length; i++) {
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for (int j = 0; j < rows[i].length; j++) {
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byte[] bytes = regions[i].get(rows[i][j], COLUMN_NAME).getValue();
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byte[] bytes = regions[i].get(rows[i][j], COLUMN_NAME, -1, -1)[0].getValue();
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assertNotNull(bytes);
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assertTrue(Bytes.equals(bytes, rows[i][j]));
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}
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