HBASE-17595 addendum fix the problem for mayHaveMoreCellsInRow
This commit is contained in:
zhangduo
parent
9726c71681
commit
849ab5ff29
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@ -23,6 +23,7 @@ import java.io.IOException;
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import java.util.Arrays;
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import org.apache.hadoop.hbase.Cell;
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import org.apache.hadoop.hbase.CellUtil;
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import org.apache.hadoop.hbase.classification.InterfaceAudience;
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/**
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@ -38,13 +39,23 @@ class AllowPartialScanResultCache implements ScanResultCache {
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// beginning of a row when retry.
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private Cell lastCell;
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private void updateLastCell(Result result) {
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private boolean lastResultPartial;
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private int numberOfCompleteRows;
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private void recordLastResult(Result result) {
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lastCell = result.rawCells()[result.rawCells().length - 1];
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lastResultPartial = result.mayHaveMoreCellsInRow();
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}
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@Override
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public Result[] addAndGet(Result[] results, boolean isHeartbeatMessage) throws IOException {
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if (results.length == 0) {
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if (!isHeartbeatMessage && lastResultPartial) {
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// An empty non heartbeat result indicate that there must be a row change. So if the
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// lastResultPartial is true then we need to increase numberOfCompleteRows.
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numberOfCompleteRows++;
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}
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return EMPTY_RESULT_ARRAY;
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}
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int i;
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@ -58,16 +69,29 @@ class AllowPartialScanResultCache implements ScanResultCache {
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if (i == results.length) {
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return EMPTY_RESULT_ARRAY;
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}
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updateLastCell(results[results.length - 1]);
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if (i > 0) {
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return Arrays.copyOfRange(results, i, results.length);
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} else {
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return results;
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if (lastResultPartial && !CellUtil.matchingRow(lastCell, results[0].getRow())) {
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// there is a row change, so increase numberOfCompleteRows
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numberOfCompleteRows++;
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}
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recordLastResult(results[results.length - 1]);
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if (i > 0) {
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results = Arrays.copyOfRange(results, i, results.length);
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}
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for (Result result : results) {
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if (!result.mayHaveMoreCellsInRow()) {
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numberOfCompleteRows++;
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}
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}
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return results;
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}
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@Override
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public void clear() {
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// we do not cache anything
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}
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@Override
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public int numberOfCompleteRows() {
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return numberOfCompleteRows;
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}
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}
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@ -26,6 +26,7 @@ import java.util.Deque;
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import java.util.List;
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import org.apache.hadoop.hbase.Cell;
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import org.apache.hadoop.hbase.CellUtil;
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import org.apache.hadoop.hbase.classification.InterfaceAudience;
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import org.apache.hadoop.hbase.util.Bytes;
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@ -45,19 +46,25 @@ public class BatchScanResultCache implements ScanResultCache {
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// beginning of a row when retry.
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private Cell lastCell;
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private boolean lastResultPartial;
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private final Deque<Result> partialResults = new ArrayDeque<>();
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private int numCellsOfPartialResults;
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private int numberOfCompleteRows;
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public BatchScanResultCache(int batch) {
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this.batch = batch;
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}
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private void updateLastCell(Result result) {
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private void recordLastResult(Result result) {
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lastCell = result.rawCells()[result.rawCells().length - 1];
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lastResultPartial = result.mayHaveMoreCellsInRow();
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}
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private Result createCompletedResult() throws IOException {
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numberOfCompleteRows++;
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Result result = Result.createCompleteResult(partialResults);
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partialResults.clear();
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numCellsOfPartialResults = 0;
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@ -104,9 +111,16 @@ public class BatchScanResultCache implements ScanResultCache {
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@Override
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public Result[] addAndGet(Result[] results, boolean isHeartbeatMessage) throws IOException {
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if (results.length == 0) {
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if (!partialResults.isEmpty() && !isHeartbeatMessage) {
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if (!isHeartbeatMessage) {
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if (!partialResults.isEmpty()) {
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return new Result[] { createCompletedResult() };
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}
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if (lastResultPartial) {
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// An empty non heartbeat result indicate that there must be a row change. So if the
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// lastResultPartial is true then we need to increase numberOfCompleteRows.
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numberOfCompleteRows++;
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}
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}
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return EMPTY_RESULT_ARRAY;
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}
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List<Result> regroupedResults = new ArrayList<>();
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@ -115,6 +129,17 @@ public class BatchScanResultCache implements ScanResultCache {
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if (result == null) {
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continue;
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}
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if (!partialResults.isEmpty()) {
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if (!Bytes.equals(partialResults.peek().getRow(), result.getRow())) {
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// there is a row change
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regroupedResults.add(createCompletedResult());
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}
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} else if (lastResultPartial && !CellUtil.matchingRow(lastCell, result.getRow())) {
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// As for batched scan we may return partial results to user if we reach the batch limit, so
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// here we need to use lastCell to determine if there is row change and increase
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// numberOfCompleteRows.
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numberOfCompleteRows++;
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}
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// check if we have a row change
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if (!partialResults.isEmpty() &&
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!Bytes.equals(partialResults.peek().getRow(), result.getRow())) {
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@ -122,9 +147,12 @@ public class BatchScanResultCache implements ScanResultCache {
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}
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Result regroupedResult = regroupResults(result);
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if (regroupedResult != null) {
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if (!regroupedResult.mayHaveMoreCellsInRow()) {
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numberOfCompleteRows++;
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}
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regroupedResults.add(regroupedResult);
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// only update last cell when we actually return it to user.
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updateLastCell(regroupedResult);
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recordLastResult(regroupedResult);
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}
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if (!result.mayHaveMoreCellsInRow() && !partialResults.isEmpty()) {
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// We are done for this row
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@ -139,4 +167,9 @@ public class BatchScanResultCache implements ScanResultCache {
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partialResults.clear();
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numCellsOfPartialResults = 0;
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}
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@Override
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public int numberOfCompleteRows() {
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return numberOfCompleteRows;
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}
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}
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@ -18,13 +18,11 @@
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package org.apache.hadoop.hbase.client;
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import static org.apache.hadoop.hbase.client.ConnectionUtils.createScanResultCache;
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import static org.apache.hadoop.hbase.client.ConnectionUtils.numberOfIndividualRows;
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import com.google.common.annotations.VisibleForTesting;
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import java.io.IOException;
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import java.io.InterruptedIOException;
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import java.util.Arrays;
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import java.util.LinkedList;
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import java.util.concurrent.ExecutorService;
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@ -465,8 +463,11 @@ public abstract class ClientScanner extends AbstractClientScanner {
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// Groom the array of Results that we received back from the server before adding that
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// Results to the scanner's cache. If partial results are not allowed to be seen by the
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// caller, all book keeping will be performed within this method.
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int numberOfCompleteRowsBefore = scanResultCache.numberOfCompleteRows();
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Result[] resultsToAddToCache =
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scanResultCache.addAndGet(values, callable.isHeartbeatMessage());
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int numberOfCompleteRows =
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scanResultCache.numberOfCompleteRows() - numberOfCompleteRowsBefore;
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if (resultsToAddToCache.length > 0) {
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for (Result rs : resultsToAddToCache) {
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cache.add(rs);
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@ -476,13 +477,13 @@ public abstract class ClientScanner extends AbstractClientScanner {
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countdown--;
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this.lastResult = rs;
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}
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}
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if (scan.getLimit() > 0) {
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int newLimit =
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scan.getLimit() - numberOfIndividualRows(Arrays.asList(resultsToAddToCache));
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int newLimit = scan.getLimit() - numberOfCompleteRows;
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assert newLimit >= 0;
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scan.setLimit(newLimit);
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}
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}
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if (scanExhausted(values)) {
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closeScanner();
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closed = true;
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@ -31,6 +31,8 @@ import org.apache.hadoop.hbase.util.Bytes;
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@InterfaceAudience.Private
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class CompleteScanResultCache implements ScanResultCache {
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private int numberOfCompleteRows;
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private final List<Result> partialResults = new ArrayList<>();
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private Result combine() throws IOException {
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@ -59,6 +61,11 @@ class CompleteScanResultCache implements ScanResultCache {
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return prependResults;
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}
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private Result[] updateNumberOfCompleteResultsAndReturn(Result... results) {
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numberOfCompleteRows += results.length;
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return results;
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}
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@Override
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public Result[] addAndGet(Result[] results, boolean isHeartbeatMessage) throws IOException {
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// If no results were returned it indicates that either we have the all the partial results
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@ -69,7 +76,7 @@ class CompleteScanResultCache implements ScanResultCache {
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// and thus there may be more partials server side that still need to be added to the partial
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// list before we form the complete Result
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if (!partialResults.isEmpty() && !isHeartbeatMessage) {
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return new Result[] { combine() };
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return updateNumberOfCompleteResultsAndReturn(combine());
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}
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return EMPTY_RESULT_ARRAY;
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}
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@ -79,7 +86,7 @@ class CompleteScanResultCache implements ScanResultCache {
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if (last.mayHaveMoreCellsInRow()) {
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if (partialResults.isEmpty()) {
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partialResults.add(last);
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return Arrays.copyOf(results, results.length - 1);
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return updateNumberOfCompleteResultsAndReturn(Arrays.copyOf(results, results.length - 1));
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}
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// We have only one result and it is partial
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if (results.length == 1) {
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@ -90,21 +97,26 @@ class CompleteScanResultCache implements ScanResultCache {
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}
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Result completeResult = combine();
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partialResults.add(last);
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return new Result[] { completeResult };
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return updateNumberOfCompleteResultsAndReturn(completeResult);
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}
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// We have some complete results
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Result[] resultsToReturn = prependCombined(results, results.length - 1);
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partialResults.add(last);
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return resultsToReturn;
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return updateNumberOfCompleteResultsAndReturn(resultsToReturn);
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}
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if (!partialResults.isEmpty()) {
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return prependCombined(results, results.length);
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return updateNumberOfCompleteResultsAndReturn(prependCombined(results, results.length));
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}
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return results;
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return updateNumberOfCompleteResultsAndReturn(results);
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}
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@Override
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public void clear() {
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partialResults.clear();
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}
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@Override
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public int numberOfCompleteRows() {
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return numberOfCompleteRows;
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}
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}
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@ -25,7 +25,6 @@ import com.google.common.annotations.VisibleForTesting;
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import java.io.IOException;
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import java.util.Arrays;
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import java.util.Comparator;
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import java.util.List;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.ThreadLocalRandom;
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@ -303,29 +302,6 @@ public class ConnectionUtils {
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return Bytes.compareTo(info.getStartKey(), scan.getStopRow()) <= 0;
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}
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/**
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* Count the individual rows for the given result list.
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* <p>
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* There are two reason why we need to use this method instead of a simple {@code results.length}.
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* <ol>
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* <li>Server may return only part of the whole cells of a row for the last result, and if
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* allowPartial is true, we will return the array to user directly. We should not count the last
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* result.</li>
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* <li>If this is a batched scan, a row may be split into several results, but they should be
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* counted as one row. For example, a row with 15 cells will be split into 3 results with 5 cells
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* each if {@code scan.getBatch()} is 5.</li>
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* </ol>
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*/
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public static int numberOfIndividualRows(List<Result> results) {
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int count = 0;
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for (Result result : results) {
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if (!result.mayHaveMoreCellsInRow()) {
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count++;
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}
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}
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return count;
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}
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public static ScanResultCache createScanResultCache(Scan scan) {
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if (scan.getAllowPartialResults()) {
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return new AllowPartialScanResultCache();
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@ -1149,8 +1149,6 @@ public class Scan extends Query {
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* reaches this value.
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* <p>
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* This condition will be tested at last, after all other conditions such as stopRow, filter, etc.
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* <p>
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* Can not be used together with batch and allowPartial.
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* @param limit the limit of rows for this scan
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* @return this
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*/
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@ -29,7 +29,7 @@ import org.apache.hadoop.hbase.classification.InterfaceAudience;
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* <ol>
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* <li>Get results from ScanResponse proto.</li>
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* <li>Pass them to ScanResultCache and get something back.</li>
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* <li>If we actually get something back, then pass it to ScanObserver.</li>
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* <li>If we actually get something back, then pass it to ScanConsumer.</li>
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* </ol>
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*/
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@InterfaceAudience.Private
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@ -50,4 +50,9 @@ interface ScanResultCache {
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* again.
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*/
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void clear();
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/**
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* Return the number of complete rows. Used to implement limited scan.
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*/
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int numberOfCompleteRows();
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}
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@ -6076,7 +6076,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
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// If the size limit was reached it means a partial Result is being returned. Returning a
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// partial Result means that we should not reset the filters; filters should only be reset in
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// between rows
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if (!scannerContext.hasMoreCellsInRow()) {
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if (!scannerContext.mayHaveMoreCellsInRow()) {
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resetFilters();
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}
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@ -274,6 +274,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
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private final String scannerName;
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private final RegionScanner s;
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private final Region r;
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private byte[] rowOfLastPartialResult;
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public RegionScannerHolder(String scannerName, RegionScanner s, Region r) {
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this.scannerName = scannerName;
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@ -2558,9 +2559,20 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
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return -1L;
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}
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private void checkLimitOfRows(int numOfCompleteRows, int limitOfRows, boolean moreRows,
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ScannerContext scannerContext, ScanResponse.Builder builder) {
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if (numOfCompleteRows >= limitOfRows) {
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if (LOG.isTraceEnabled()) {
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LOG.trace("Done scanning, limit of rows reached, moreRows: " + moreRows +
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" scannerContext: " + scannerContext);
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}
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builder.setMoreResults(false);
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}
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}
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// return whether we have more results in region.
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private boolean scan(HBaseRpcController controller, ScanRequest request,
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RegionScannerHolder rsh, long maxQuotaResultSize, int maxResults, List<Result> results,
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private void scan(HBaseRpcController controller, ScanRequest request, RegionScannerHolder rsh,
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long maxQuotaResultSize, int maxResults, int limitOfRows, List<Result> results,
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ScanResponse.Builder builder, MutableObject lastBlock, RpcCallContext context)
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throws IOException {
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Region region = rsh.r;
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@ -2577,7 +2589,8 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
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List<Cell> values = new ArrayList<Cell>(32);
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region.startRegionOperation(Operation.SCAN);
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try {
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int i = 0;
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int numOfResults = 0;
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int numOfCompleteRows = 0;
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long before = EnvironmentEdgeManager.currentTime();
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synchronized (scanner) {
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boolean stale = (region.getRegionInfo().getReplicaId() != 0);
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@ -2622,7 +2635,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
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contextBuilder.setTrackMetrics(trackMetrics);
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ScannerContext scannerContext = contextBuilder.build();
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boolean limitReached = false;
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while (i < maxResults) {
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while (numOfResults < maxResults) {
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// Reset the batch progress to 0 before every call to RegionScanner#nextRaw. The
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// batch limit is a limit on the number of cells per Result. Thus, if progress is
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// being tracked (i.e. scannerContext.keepProgress() is true) then we need to
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@ -2634,16 +2647,46 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
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moreRows = scanner.nextRaw(values, scannerContext);
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if (!values.isEmpty()) {
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Result r = Result.create(values, null, stale, scannerContext.hasMoreCellsInRow());
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if (limitOfRows > 0) {
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// First we need to check if the last result is partial and we have a row change. If
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// so then we need to increase the numOfCompleteRows.
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if (results.isEmpty()) {
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if (rsh.rowOfLastPartialResult != null &&
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!CellUtil.matchingRow(values.get(0), rsh.rowOfLastPartialResult)) {
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numOfCompleteRows++;
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checkLimitOfRows(numOfCompleteRows, limitOfRows, moreRows, scannerContext,
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builder);
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}
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} else {
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Result lastResult = results.get(results.size() - 1);
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if (lastResult.mayHaveMoreCellsInRow() &&
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!CellUtil.matchingRow(values.get(0), lastResult.getRow())) {
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numOfCompleteRows++;
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checkLimitOfRows(numOfCompleteRows, limitOfRows, moreRows, scannerContext,
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builder);
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}
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}
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if (builder.hasMoreResults() && !builder.getMoreResults()) {
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break;
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}
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}
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boolean mayHaveMoreCellsInRow = scannerContext.mayHaveMoreCellsInRow();
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Result r = Result.create(values, null, stale, mayHaveMoreCellsInRow);
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lastBlock.setValue(addSize(context, r, lastBlock.getValue()));
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results.add(r);
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i++;
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numOfResults++;
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if (!mayHaveMoreCellsInRow && limitOfRows > 0) {
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numOfCompleteRows++;
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checkLimitOfRows(numOfCompleteRows, limitOfRows, moreRows, scannerContext, builder);
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if (builder.hasMoreResults() && !builder.getMoreResults()) {
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break;
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}
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}
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}
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boolean sizeLimitReached = scannerContext.checkSizeLimit(LimitScope.BETWEEN_ROWS);
|
||||
boolean timeLimitReached = scannerContext.checkTimeLimit(LimitScope.BETWEEN_ROWS);
|
||||
boolean rowLimitReached = i >= maxResults;
|
||||
limitReached = sizeLimitReached || timeLimitReached || rowLimitReached;
|
||||
boolean resultsLimitReached = numOfResults >= maxResults;
|
||||
limitReached = sizeLimitReached || timeLimitReached || resultsLimitReached;
|
||||
|
||||
if (limitReached || !moreRows) {
|
||||
if (LOG.isTraceEnabled()) {
|
||||
|
|
@ -2669,7 +2712,6 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
|
|||
// We didn't get a single batch
|
||||
builder.setMoreResultsInRegion(false);
|
||||
}
|
||||
|
||||
// Check to see if the client requested that we track metrics server side. If the
|
||||
// client requested metrics, retrieve the metrics from the scanner context.
|
||||
if (trackMetrics) {
|
||||
|
|
@ -2686,7 +2728,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
|
|||
builder.setScanMetrics(metricBuilder.build());
|
||||
}
|
||||
}
|
||||
region.updateReadRequestsCount(i);
|
||||
region.updateReadRequestsCount(numOfResults);
|
||||
long end = EnvironmentEdgeManager.currentTime();
|
||||
long responseCellSize = context != null ? context.getResponseCellSize() : 0;
|
||||
region.getMetrics().updateScanTime(end - before);
|
||||
|
|
@ -2701,7 +2743,6 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
|
|||
if (region.getCoprocessorHost() != null) {
|
||||
region.getCoprocessorHost().postScannerNext(scanner, results, maxResults, true);
|
||||
}
|
||||
return builder.getMoreResultsInRegion();
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -2809,14 +2850,11 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
|
|||
// now let's do the real scan.
|
||||
long maxQuotaResultSize = Math.min(maxScannerResultSize, quota.getReadAvailable());
|
||||
RegionScanner scanner = rsh.s;
|
||||
boolean moreResults = true;
|
||||
boolean moreResultsInRegion = true;
|
||||
// this is the limit of rows for this scan, if we the number of rows reach this value, we will
|
||||
// close the scanner.
|
||||
int limitOfRows;
|
||||
if (request.hasLimitOfRows()) {
|
||||
limitOfRows = request.getLimitOfRows();
|
||||
rows = Math.min(rows, limitOfRows);
|
||||
} else {
|
||||
limitOfRows = -1;
|
||||
}
|
||||
|
|
@ -2839,32 +2877,44 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
|
|||
}
|
||||
}
|
||||
if (!done) {
|
||||
moreResultsInRegion = scan((HBaseRpcController) controller, request, rsh,
|
||||
maxQuotaResultSize, rows, results, builder, lastBlock, context);
|
||||
scan((HBaseRpcController) controller, request, rsh, maxQuotaResultSize, rows, limitOfRows,
|
||||
results, builder, lastBlock, context);
|
||||
}
|
||||
}
|
||||
|
||||
quota.addScanResult(results);
|
||||
|
||||
addResults(builder, results, (HBaseRpcController) controller,
|
||||
RegionReplicaUtil.isDefaultReplica(region.getRegionInfo()));
|
||||
if (scanner.isFilterDone() && results.isEmpty()) {
|
||||
// If the scanner's filter - if any - is done with the scan
|
||||
// only set moreResults to false if the results is empty. This is used to keep compatible
|
||||
// with the old scan implementation where we just ignore the returned results if moreResults
|
||||
// is false. Can remove the isEmpty check after we get rid of the old implementation.
|
||||
moreResults = false;
|
||||
} else if (limitOfRows > 0 && !results.isEmpty() &&
|
||||
!results.get(results.size() - 1).mayHaveMoreCellsInRow() &&
|
||||
ConnectionUtils.numberOfIndividualRows(results) >= limitOfRows) {
|
||||
// if we have reached the limit of rows
|
||||
moreResults = false;
|
||||
builder.setMoreResults(false);
|
||||
}
|
||||
addResults(builder, results, (HBaseRpcController) controller,
|
||||
RegionReplicaUtil.isDefaultReplica(region.getRegionInfo()));
|
||||
if (!moreResults || !moreResultsInRegion || closeScanner) {
|
||||
// we only set moreResults to false in the above code, so set it to true if we haven't set it
|
||||
// yet.
|
||||
if (!builder.hasMoreResults()) {
|
||||
builder.setMoreResults(true);
|
||||
}
|
||||
if (builder.getMoreResults() && builder.getMoreResultsInRegion() && !results.isEmpty()) {
|
||||
// Record the last cell of the last result if it is a partial result
|
||||
// We need this to calculate the complete rows we have returned to client as the
|
||||
// mayHaveMoreCellsInRow is true does not mean that there will be extra cells for the
|
||||
// current row. We may filter out all the remaining cells for the current row and just
|
||||
// return the cells of the nextRow when calling RegionScanner.nextRaw. So here we need to
|
||||
// check for row change.
|
||||
Result lastResult = results.get(results.size() - 1);
|
||||
if (lastResult.mayHaveMoreCellsInRow()) {
|
||||
rsh.rowOfLastPartialResult = lastResult.getRow();
|
||||
} else {
|
||||
rsh.rowOfLastPartialResult = null;
|
||||
}
|
||||
}
|
||||
if (!builder.getMoreResults() || !builder.getMoreResultsInRegion() || closeScanner) {
|
||||
scannerClosed = true;
|
||||
closeScanner(region, scanner, scannerName, context);
|
||||
}
|
||||
builder.setMoreResults(moreResults);
|
||||
return builder.build();
|
||||
} catch (Exception e) {
|
||||
try {
|
||||
|
|
|
|||
|
|
@ -221,7 +221,7 @@ public class ScannerContext {
|
|||
* @return true when we have more cells for the current row. This usually because we have reached
|
||||
* a limit in the middle of a row
|
||||
*/
|
||||
boolean hasMoreCellsInRow() {
|
||||
boolean mayHaveMoreCellsInRow() {
|
||||
return scannerState == NextState.SIZE_LIMIT_REACHED_MID_ROW ||
|
||||
scannerState == NextState.TIME_LIMIT_REACHED_MID_ROW ||
|
||||
scannerState == NextState.BATCH_LIMIT_REACHED;
|
||||
|
|
|
|||
|
|
@ -0,0 +1,58 @@
|
|||
/**
|
||||
* Licensed to the Apache Software Foundation (ASF) under one
|
||||
* or more contributor license agreements. See the NOTICE file
|
||||
* distributed with this work for additional information
|
||||
* regarding copyright ownership. The ASF licenses this file
|
||||
* to you under the Apache License, Version 2.0 (the
|
||||
* "License"); you may not use this file except in compliance
|
||||
* with the License. You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
package org.apache.hadoop.hbase.client;
|
||||
|
||||
import java.io.IOException;
|
||||
|
||||
import org.apache.hadoop.hbase.Cell;
|
||||
import org.apache.hadoop.hbase.classification.InterfaceAudience;
|
||||
import org.apache.hadoop.hbase.exceptions.DeserializationException;
|
||||
import org.apache.hadoop.hbase.filter.FilterBase;
|
||||
import org.apache.hadoop.hbase.util.Bytes;
|
||||
|
||||
@InterfaceAudience.Private
|
||||
public final class ColumnCountOnRowFilter extends FilterBase {
|
||||
|
||||
private final int limit;
|
||||
|
||||
private int count = 0;
|
||||
|
||||
public ColumnCountOnRowFilter(int limit) {
|
||||
this.limit = limit;
|
||||
}
|
||||
|
||||
@Override
|
||||
public ReturnCode filterKeyValue(Cell v) throws IOException {
|
||||
count++;
|
||||
return count > limit ? ReturnCode.NEXT_ROW : ReturnCode.INCLUDE;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void reset() throws IOException {
|
||||
this.count = 0;
|
||||
}
|
||||
|
||||
@Override
|
||||
public byte[] toByteArray() throws IOException {
|
||||
return Bytes.toBytes(limit);
|
||||
}
|
||||
|
||||
public static ColumnCountOnRowFilter parseFrom(byte[] bytes) throws DeserializationException {
|
||||
return new ColumnCountOnRowFilter(Bytes.toInt(bytes));
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,177 @@
|
|||
/**
|
||||
* Licensed to the Apache Software Foundation (ASF) under one
|
||||
* or more contributor license agreements. See the NOTICE file
|
||||
* distributed with this work for additional information
|
||||
* regarding copyright ownership. The ASF licenses this file
|
||||
* to you under the Apache License, Version 2.0 (the
|
||||
* "License"); you may not use this file except in compliance
|
||||
* with the License. You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
package org.apache.hadoop.hbase.client;
|
||||
|
||||
import static org.junit.Assert.assertEquals;
|
||||
import static org.junit.Assert.assertFalse;
|
||||
import static org.junit.Assert.assertNull;
|
||||
import static org.junit.Assert.assertTrue;
|
||||
|
||||
import java.io.IOException;
|
||||
|
||||
import org.apache.hadoop.hbase.HBaseTestingUtility;
|
||||
import org.apache.hadoop.hbase.TableName;
|
||||
import org.apache.hadoop.hbase.testclassification.ClientTests;
|
||||
import org.apache.hadoop.hbase.testclassification.MediumTests;
|
||||
import org.apache.hadoop.hbase.util.Bytes;
|
||||
import org.junit.AfterClass;
|
||||
import org.junit.BeforeClass;
|
||||
import org.junit.Test;
|
||||
import org.junit.experimental.categories.Category;
|
||||
|
||||
/**
|
||||
* With filter we may stop at a middle of row and think that we still have more cells for the
|
||||
* current row but actually all the remaining cells will be filtered out by the filter. So it will
|
||||
* lead to a Result that mayHaveMoreCellsInRow is true but actually there are no cells for the same
|
||||
* row. Here we want to test if our limited scan still works.
|
||||
*/
|
||||
@Category({ MediumTests.class, ClientTests.class })
|
||||
public class TestLimitedScanWithFilter {
|
||||
|
||||
private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
|
||||
|
||||
private static final TableName TABLE_NAME = TableName.valueOf("TestRegionScanner");
|
||||
|
||||
private static final byte[] FAMILY = Bytes.toBytes("cf");
|
||||
|
||||
private static final byte[][] CQS =
|
||||
{ Bytes.toBytes("cq1"), Bytes.toBytes("cq2"), Bytes.toBytes("cq3"), Bytes.toBytes("cq4") };
|
||||
|
||||
private static int ROW_COUNT = 10;
|
||||
|
||||
@BeforeClass
|
||||
public static void setUp() throws Exception {
|
||||
UTIL.startMiniCluster(1);
|
||||
try (Table table = UTIL.createTable(TABLE_NAME, FAMILY)) {
|
||||
for (int i = 0; i < ROW_COUNT; i++) {
|
||||
Put put = new Put(Bytes.toBytes(i));
|
||||
for (int j = 0; j < CQS.length; j++) {
|
||||
put.addColumn(FAMILY, CQS[j], Bytes.toBytes((j + 1) * i));
|
||||
}
|
||||
table.put(put);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@AfterClass
|
||||
public static void tearDown() throws Exception {
|
||||
UTIL.shutdownMiniCluster();
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testCompleteResult() throws IOException {
|
||||
int limit = 5;
|
||||
Scan scan =
|
||||
new Scan().setFilter(new ColumnCountOnRowFilter(2)).setMaxResultSize(1).setLimit(limit);
|
||||
try (Table table = UTIL.getConnection().getTable(TABLE_NAME);
|
||||
ResultScanner scanner = table.getScanner(scan)) {
|
||||
for (int i = 0; i < limit; i++) {
|
||||
Result result = scanner.next();
|
||||
assertEquals(i, Bytes.toInt(result.getRow()));
|
||||
assertEquals(2, result.size());
|
||||
assertFalse(result.mayHaveMoreCellsInRow());
|
||||
assertEquals(i, Bytes.toInt(result.getValue(FAMILY, CQS[0])));
|
||||
assertEquals(2 * i, Bytes.toInt(result.getValue(FAMILY, CQS[1])));
|
||||
}
|
||||
assertNull(scanner.next());
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testAllowPartial() throws IOException {
|
||||
int limit = 5;
|
||||
Scan scan = new Scan().setFilter(new ColumnCountOnRowFilter(2)).setMaxResultSize(1)
|
||||
.setAllowPartialResults(true).setLimit(limit);
|
||||
try (Table table = UTIL.getConnection().getTable(TABLE_NAME);
|
||||
ResultScanner scanner = table.getScanner(scan)) {
|
||||
for (int i = 0; i < 2 * limit; i++) {
|
||||
int key = i / 2;
|
||||
Result result = scanner.next();
|
||||
assertEquals(key, Bytes.toInt(result.getRow()));
|
||||
assertEquals(1, result.size());
|
||||
assertTrue(result.mayHaveMoreCellsInRow());
|
||||
int cqIndex = i % 2;
|
||||
assertEquals(key * (cqIndex + 1), Bytes.toInt(result.getValue(FAMILY, CQS[cqIndex])));
|
||||
}
|
||||
assertNull(scanner.next());
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testBatchAllowPartial() throws IOException {
|
||||
int limit = 5;
|
||||
Scan scan = new Scan().setFilter(new ColumnCountOnRowFilter(3)).setBatch(2).setMaxResultSize(1)
|
||||
.setAllowPartialResults(true).setLimit(limit);
|
||||
try (Table table = UTIL.getConnection().getTable(TABLE_NAME);
|
||||
ResultScanner scanner = table.getScanner(scan)) {
|
||||
for (int i = 0; i < 3 * limit; i++) {
|
||||
int key = i / 3;
|
||||
Result result = scanner.next();
|
||||
assertEquals(key, Bytes.toInt(result.getRow()));
|
||||
assertEquals(1, result.size());
|
||||
assertTrue(result.mayHaveMoreCellsInRow());
|
||||
int cqIndex = i % 3;
|
||||
assertEquals(key * (cqIndex + 1), Bytes.toInt(result.getValue(FAMILY, CQS[cqIndex])));
|
||||
}
|
||||
assertNull(scanner.next());
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testBatch() throws IOException {
|
||||
int limit = 5;
|
||||
Scan scan = new Scan().setFilter(new ColumnCountOnRowFilter(2)).setBatch(2).setMaxResultSize(1)
|
||||
.setLimit(limit);
|
||||
try (Table table = UTIL.getConnection().getTable(TABLE_NAME);
|
||||
ResultScanner scanner = table.getScanner(scan)) {
|
||||
for (int i = 0; i < limit; i++) {
|
||||
Result result = scanner.next();
|
||||
assertEquals(i, Bytes.toInt(result.getRow()));
|
||||
assertEquals(2, result.size());
|
||||
assertTrue(result.mayHaveMoreCellsInRow());
|
||||
assertEquals(i, Bytes.toInt(result.getValue(FAMILY, CQS[0])));
|
||||
assertEquals(2 * i, Bytes.toInt(result.getValue(FAMILY, CQS[1])));
|
||||
}
|
||||
assertNull(scanner.next());
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testBatchAndFilterDiffer() throws IOException {
|
||||
int limit = 5;
|
||||
Scan scan = new Scan().setFilter(new ColumnCountOnRowFilter(3)).setBatch(2).setMaxResultSize(1)
|
||||
.setLimit(limit);
|
||||
try (Table table = UTIL.getConnection().getTable(TABLE_NAME);
|
||||
ResultScanner scanner = table.getScanner(scan)) {
|
||||
for (int i = 0; i < limit; i++) {
|
||||
Result result = scanner.next();
|
||||
assertEquals(i, Bytes.toInt(result.getRow()));
|
||||
assertEquals(2, result.size());
|
||||
assertTrue(result.mayHaveMoreCellsInRow());
|
||||
assertEquals(i, Bytes.toInt(result.getValue(FAMILY, CQS[0])));
|
||||
assertEquals(2 * i, Bytes.toInt(result.getValue(FAMILY, CQS[1])));
|
||||
result = scanner.next();
|
||||
assertEquals(i, Bytes.toInt(result.getRow()));
|
||||
assertEquals(1, result.size());
|
||||
assertFalse(result.mayHaveMoreCellsInRow());
|
||||
assertEquals(3 * i, Bytes.toInt(result.getValue(FAMILY, CQS[2])));
|
||||
}
|
||||
assertNull(scanner.next());
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue