HBASE-13335 Use serverHasMoreResults context in SmallScanner and SmallReversedScanner.
Use the context passed back via ScanResponse that a RegionServer fills in to denote whether or not more results existing in the current Region. Add a simple factory to remove a static method used across both SmallScanner and SmallReverseScanner. Add new unit tests for both scanner classes to test scans with and without the new context (as a quick backward-compatibility test).
This commit is contained in:
Josh Elser
Enis Soztutar
parent
35ddea75c4
commit
ffdcc00952
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@ -31,9 +31,13 @@ import org.apache.hadoop.hbase.CellUtil;
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import org.apache.hadoop.hbase.HConstants;
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import org.apache.hadoop.hbase.TableName;
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import org.apache.hadoop.hbase.classification.InterfaceAudience;
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import org.apache.hadoop.hbase.client.ClientSmallScanner.SmallScannerCallable;
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import org.apache.hadoop.hbase.client.ClientSmallScanner.SmallScannerCallableFactory;
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import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
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import org.apache.hadoop.hbase.util.Bytes;
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import com.google.common.annotations.VisibleForTesting;
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/**
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* Client scanner for small reversed scan. Generally, only one RPC is called to fetch the
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* scan results, unless the results cross multiple regions or the row count of
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@ -46,33 +50,83 @@ public class ClientSmallReversedScanner extends ReversedClientScanner {
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private static final Log LOG = LogFactory.getLog(ClientSmallReversedScanner.class);
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private ScannerCallableWithReplicas smallScanCallable = null;
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private byte[] skipRowOfFirstResult = null;
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private SmallScannerCallableFactory callableFactory;
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/**
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* Create a new ReversibleClientScanner for the specified table Note that the
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* passed {@link Scan}'s start row maybe changed changed.
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* Create a new ReversibleClientScanner for the specified table. Take note that the passed
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* {@link Scan} 's start row maybe changed changed.
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*
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* @param conf The {@link Configuration} to use.
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* @param scan {@link Scan} to use in this scanner
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* @param tableName The table that we wish to rangeGet
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* @param connection Connection identifying the cluster
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* @param conf
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* The {@link Configuration} to use.
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* @param scan
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* {@link Scan} to use in this scanner
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* @param tableName
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* The table that we wish to rangeGet
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* @param connection
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* Connection identifying the cluster
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* @param rpcFactory
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* Factory used to create the {@link RpcRetryingCaller}
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* @param controllerFactory
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* Factory used to access RPC payloads
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* @param pool
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* Threadpool for RPC threads
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* @param primaryOperationTimeout
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* Call timeout
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* @throws IOException
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* If the remote call fails
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*/
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public ClientSmallReversedScanner(final Configuration conf, final Scan scan,
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final TableName tableName, ClusterConnection connection,
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RpcRetryingCallerFactory rpcFactory, RpcControllerFactory controllerFactory,
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ExecutorService pool, int primaryOperationTimeout) throws IOException {
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super(conf, scan, tableName, connection, rpcFactory, controllerFactory, pool,
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primaryOperationTimeout);
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final TableName tableName, ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
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RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout)
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throws IOException {
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this(conf, scan, tableName, connection, rpcFactory, controllerFactory, pool,
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primaryOperationTimeout, new SmallScannerCallableFactory());
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}
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/**
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* Gets a scanner for following scan. Move to next region or continue from the
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* last result or start from the start row.
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* Create a new ReversibleClientScanner for the specified table. Take note that the passed
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* {@link Scan}'s start row may be changed.
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*
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* @param conf
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* The {@link Configuration} to use.
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* @param scan
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* {@link Scan} to use in this scanner
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* @param tableName
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* The table that we wish to rangeGet
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* @param connection
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* Connection identifying the cluster
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* @param rpcFactory
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* Factory used to create the {@link RpcRetryingCaller}
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* @param controllerFactory
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* Factory used to access RPC payloads
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* @param pool
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* Threadpool for RPC threads
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* @param primaryOperationTimeout
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* Call timeout
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* @param callableFactory
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* Factory used to create the {@link SmallScannerCallable}
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* @throws IOException
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* If the remote call fails
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*/
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@VisibleForTesting
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ClientSmallReversedScanner(final Configuration conf, final Scan scan, final TableName tableName,
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ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
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RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout,
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SmallScannerCallableFactory callableFactory) throws IOException {
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super(conf, scan, tableName, connection, rpcFactory, controllerFactory, pool,
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primaryOperationTimeout);
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this.callableFactory = callableFactory;
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}
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/**
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* Gets a scanner for following scan. Move to next region or continue from the last result or
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* start from the start row.
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*
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* @param nbRows
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* @param done true if Server-side says we're done scanning.
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* @param currentRegionDone true if scan is over on current region
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* @param done
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* true if Server-side says we're done scanning.
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* @param currentRegionDone
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* true if scan is over on current region
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* @return true if has next scanner
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* @throws IOException
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*/
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@ -112,10 +166,9 @@ public class ClientSmallReversedScanner extends ReversedClientScanner {
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+ Bytes.toStringBinary(localStartKey) + "'");
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}
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smallScanCallable = ClientSmallScanner.getSmallScanCallable(
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getConnection(), getTable(), scan, getScanMetrics(), localStartKey, cacheNum,
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rpcControllerFactory, getPool(), getPrimaryOperationTimeout(),
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getRetries(), getScannerTimeout(), getConf(), caller);
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smallScanCallable = callableFactory.getCallable(getConnection(), getTable(), scan,
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getScanMetrics(), localStartKey, cacheNum, rpcControllerFactory, getPool(),
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getPrimaryOperationTimeout(), getRetries(), getScannerTimeout(), getConf(), caller);
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if (this.scanMetrics != null && skipRowOfFirstResult == null) {
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this.scanMetrics.countOfRegions.incrementAndGet();
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@ -131,6 +184,20 @@ public class ClientSmallReversedScanner extends ReversedClientScanner {
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return null;
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}
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if (cache.size() == 0) {
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loadCache();
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}
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if (cache.size() > 0) {
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return cache.poll();
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}
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// if we exhausted this scanner before calling close, write out the scan
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// metrics
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writeScanMetrics();
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return null;
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}
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@Override
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protected void loadCache() throws IOException {
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Result[] values = null;
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long remainingResultSize = maxScannerResultSize;
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int countdown = this.caching;
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@ -143,7 +210,6 @@ public class ClientSmallReversedScanner extends ReversedClientScanner {
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// exhausted current region.
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// callWithoutRetries is at this layer. Within the ScannerCallableWithReplicas,
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// we do a callWithRetries
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// TODO use context from server
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values = this.caller.callWithoutRetries(smallScanCallable, scannerTimeout);
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this.currentRegion = smallScanCallable.getHRegionInfo();
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long currentTime = System.currentTimeMillis();
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@ -169,19 +235,13 @@ public class ClientSmallReversedScanner extends ReversedClientScanner {
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this.lastResult = rs;
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}
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}
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if (smallScanCallable.hasMoreResultsContext()) {
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currentRegionDone = !smallScanCallable.getServerHasMoreResults();
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} else {
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currentRegionDone = countdown > 0;
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}
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}
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if (cache.size() > 0) {
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return cache.poll();
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}
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// if we exhausted this scanner before calling close, write out the scan
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// metrics
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writeScanMetrics();
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return null;
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}
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@Override
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protected void initializeScannerInConstruction() throws IOException {
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@ -195,4 +255,8 @@ public class ClientSmallReversedScanner extends ReversedClientScanner {
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closed = true;
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}
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@VisibleForTesting
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protected void setScannerCallableFactory(SmallScannerCallableFactory callableFactory) {
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this.callableFactory = callableFactory;
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}
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}
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@ -39,6 +39,7 @@ import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanRequest;
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import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanResponse;
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import org.apache.hadoop.hbase.util.Bytes;
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import com.google.common.annotations.VisibleForTesting;
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import com.google.protobuf.ServiceException;
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/**
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@ -55,26 +56,72 @@ public class ClientSmallScanner extends ClientScanner {
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// When fetching results from server, skip the first result if it has the same
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// row with this one
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private byte[] skipRowOfFirstResult = null;
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private SmallScannerCallableFactory callableFactory;
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/**
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* Create a new ShortClientScanner for the specified table Note that the
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* passed {@link Scan}'s start row maybe changed changed.
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* Create a new ShortClientScanner for the specified table. Take note that the passed {@link Scan}
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* 's start row maybe changed changed.
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*
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* @param conf The {@link Configuration} to use.
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* @param scan {@link Scan} to use in this scanner
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* @param tableName The table that we wish to rangeGet
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* @param connection Connection identifying the cluster
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* @param conf
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* The {@link Configuration} to use.
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* @param scan
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* {@link Scan} to use in this scanner
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* @param tableName
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* The table that we wish to rangeGet
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* @param connection
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* Connection identifying the cluster
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* @param rpcFactory
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* Factory used to create the {@link RpcRetryingCaller}
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* @param controllerFactory
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* Factory used to access RPC payloads
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* @param pool
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* Threadpool for RPC threads
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* @param primaryOperationTimeout
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* Call timeout
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* @throws IOException
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* If the remote call fails
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*/
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public ClientSmallScanner(final Configuration conf, final Scan scan, final TableName tableName,
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ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
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RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout)
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throws IOException {
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this(conf, scan, tableName, connection, rpcFactory, controllerFactory, pool,
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primaryOperationTimeout, new SmallScannerCallableFactory());
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}
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/**
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* Create a new ShortClientScanner for the specified table. Take note that the passed {@link Scan}
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* 's start row maybe changed changed. Intended for unit tests to provide their own
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* {@link SmallScannerCallableFactory} implementation/mock.
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*
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* @param conf
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* The {@link Configuration} to use.
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* @param scan
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* {@link Scan} to use in this scanner
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* @param tableName
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* The table that we wish to rangeGet
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* @param connection
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* Connection identifying the cluster
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* @param rpcFactory
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* Factory used to create the {@link RpcRetryingCaller}
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* @param controllerFactory
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* Factory used to access RPC payloads
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* @param pool
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* Threadpool for RPC threads
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* @param primaryOperationTimeout
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* Call timeout
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* @param callableFactory
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* Factory used to create the {@link SmallScannerCallable}
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* @throws IOException
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*/
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public ClientSmallScanner(final Configuration conf, final Scan scan,
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final TableName tableName, ClusterConnection connection,
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RpcRetryingCallerFactory rpcFactory, RpcControllerFactory controllerFactory,
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ExecutorService pool, int primaryOperationTimeout) throws IOException {
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@VisibleForTesting
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ClientSmallScanner(final Configuration conf, final Scan scan, final TableName tableName,
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ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
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RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout,
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SmallScannerCallableFactory callableFactory) throws IOException {
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super(conf, scan, tableName, connection, rpcFactory, controllerFactory, pool,
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primaryOperationTimeout);
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this.callableFactory = callableFactory;
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}
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@Override
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@ -125,32 +172,15 @@ public class ClientSmallScanner extends ClientScanner {
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LOG.trace("Advancing internal small scanner to startKey at '"
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+ Bytes.toStringBinary(localStartKey) + "'");
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}
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smallScanCallable = getSmallScanCallable(
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getConnection(), getTable(), scan, getScanMetrics(), localStartKey, cacheNum,
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rpcControllerFactory, getPool(), getPrimaryOperationTimeout(),
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getRetries(), getScannerTimeout(), getConf(), caller);
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smallScanCallable = callableFactory.getCallable(getConnection(), getTable(), scan,
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getScanMetrics(), localStartKey, cacheNum, rpcControllerFactory, getPool(),
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getPrimaryOperationTimeout(), getRetries(), getScannerTimeout(), getConf(), caller);
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if (this.scanMetrics != null && skipRowOfFirstResult == null) {
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this.scanMetrics.countOfRegions.incrementAndGet();
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}
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return true;
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}
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static ScannerCallableWithReplicas getSmallScanCallable(ClusterConnection connection,
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TableName table, Scan scan, ScanMetrics scanMetrics, byte[] localStartKey,
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final int cacheNum, RpcControllerFactory controllerFactory, ExecutorService pool,
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int primaryOperationTimeout, int retries, int scannerTimeout, Configuration conf,
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RpcRetryingCaller<Result[]> caller) {
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scan.setStartRow(localStartKey);
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SmallScannerCallable s = new SmallScannerCallable(
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connection, table, scan, scanMetrics, controllerFactory, cacheNum, 0);
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ScannerCallableWithReplicas scannerCallableWithReplicas =
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new ScannerCallableWithReplicas(table, connection,
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s, pool, primaryOperationTimeout, scan, retries,
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scannerTimeout, cacheNum, conf, caller);
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return scannerCallableWithReplicas;
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}
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static class SmallScannerCallable extends ScannerCallable {
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public SmallScannerCallable(
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ClusterConnection connection, TableName table, Scan scan,
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@ -202,6 +232,20 @@ public class ClientSmallScanner extends ClientScanner {
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return null;
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}
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if (cache.size() == 0) {
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loadCache();
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}
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if (cache.size() > 0) {
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return cache.poll();
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}
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// if we exhausted this scanner before calling close, write out the scan
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// metrics
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writeScanMetrics();
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return null;
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}
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@Override
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protected void loadCache() throws IOException {
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Result[] values = null;
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long remainingResultSize = maxScannerResultSize;
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int countdown = this.caching;
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@ -214,7 +258,6 @@ public class ClientSmallScanner extends ClientScanner {
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// exhausted current region.
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// callWithoutRetries is at this layer. Within the ScannerCallableWithReplicas,
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// we do a callWithRetries
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// TODO Use the server's response about more results
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values = this.caller.callWithoutRetries(smallScanCallable, scannerTimeout);
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this.currentRegion = smallScanCallable.getHRegionInfo();
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long currentTime = System.currentTimeMillis();
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@ -240,22 +283,42 @@ public class ClientSmallScanner extends ClientScanner {
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this.lastResult = rs;
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}
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}
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if (smallScanCallable.hasMoreResultsContext()) {
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// If the server has more results, the current region is not done
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currentRegionDone = !smallScanCallable.getServerHasMoreResults();
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} else {
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// not guaranteed to get the context in older versions, fall back to checking countdown
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currentRegionDone = countdown > 0;
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}
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}
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if (cache.size() > 0) {
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return cache.poll();
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}
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// if we exhausted this scanner before calling close, write out the scan
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// metrics
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writeScanMetrics();
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return null;
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}
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@Override
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public void close() {
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if (!scanMetricsPublished) writeScanMetrics();
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closed = true;
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}
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@VisibleForTesting
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protected void setScannerCallableFactory(SmallScannerCallableFactory callableFactory) {
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this.callableFactory = callableFactory;
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}
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@InterfaceAudience.Private
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protected static class SmallScannerCallableFactory {
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public ScannerCallableWithReplicas getCallable(ClusterConnection connection, TableName table,
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Scan scan, ScanMetrics scanMetrics, byte[] localStartKey, int cacheNum,
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RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout,
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int retries, int scannerTimeout, Configuration conf, RpcRetryingCaller<Result[]> caller) {
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scan.setStartRow(localStartKey);
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SmallScannerCallable s = new SmallScannerCallable(
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connection, table, scan, scanMetrics, controllerFactory, cacheNum, 0);
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ScannerCallableWithReplicas scannerCallableWithReplicas =
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new ScannerCallableWithReplicas(table, connection,
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s, pool, primaryOperationTimeout, scan, retries,
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scannerTimeout, cacheNum, conf, caller);
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return scannerCallableWithReplicas;
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}
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}
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}
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@ -0,0 +1,349 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.hbase.client;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertTrue;
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import java.util.Iterator;
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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.Executors;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.hbase.Cell;
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import org.apache.hadoop.hbase.HConstants;
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import org.apache.hadoop.hbase.HRegionInfo;
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import org.apache.hadoop.hbase.KeyValue;
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import org.apache.hadoop.hbase.KeyValue.Type;
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import org.apache.hadoop.hbase.TableName;
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import org.apache.hadoop.hbase.client.ClientSmallScanner.SmallScannerCallableFactory;
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import org.apache.hadoop.hbase.client.metrics.ScanMetrics;
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import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
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import org.apache.hadoop.hbase.testclassification.SmallTests;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.Test;
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import org.junit.experimental.categories.Category;
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import org.mockito.Mockito;
|
||||
import org.mockito.invocation.InvocationOnMock;
|
||||
import org.mockito.stubbing.Answer;
|
||||
|
||||
/**
|
||||
* Test the ClientSmallReversedScanner.
|
||||
*/
|
||||
@Category(SmallTests.class)
|
||||
public class TestClientSmallReversedScanner {
|
||||
|
||||
Scan scan;
|
||||
ExecutorService pool;
|
||||
Configuration conf;
|
||||
|
||||
ClusterConnection clusterConn;
|
||||
RpcRetryingCallerFactory rpcFactory;
|
||||
RpcControllerFactory controllerFactory;
|
||||
RpcRetryingCaller<Result[]> caller;
|
||||
|
||||
@Before
|
||||
@SuppressWarnings({"deprecation", "unchecked"})
|
||||
public void setup() throws IOException {
|
||||
clusterConn = Mockito.mock(ClusterConnection.class);
|
||||
rpcFactory = Mockito.mock(RpcRetryingCallerFactory.class);
|
||||
controllerFactory = Mockito.mock(RpcControllerFactory.class);
|
||||
pool = Executors.newSingleThreadExecutor();
|
||||
scan = new Scan();
|
||||
conf = new Configuration();
|
||||
Mockito.when(clusterConn.getConfiguration()).thenReturn(conf);
|
||||
// Mock out the RpcCaller
|
||||
caller = Mockito.mock(RpcRetryingCaller.class);
|
||||
// Return the mock from the factory
|
||||
Mockito.when(rpcFactory.<Result[]> newCaller()).thenReturn(caller);
|
||||
}
|
||||
|
||||
@After
|
||||
public void teardown() {
|
||||
if (null != pool) {
|
||||
pool.shutdownNow();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a simple Answer which returns true the first time, and false every time after.
|
||||
*/
|
||||
private Answer<Boolean> createTrueThenFalseAnswer() {
|
||||
return new Answer<Boolean>() {
|
||||
boolean first = true;
|
||||
|
||||
@Override
|
||||
public Boolean answer(InvocationOnMock invocation) {
|
||||
if (first) {
|
||||
first = false;
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
private SmallScannerCallableFactory getFactory(
|
||||
final ScannerCallableWithReplicas callableWithReplicas) {
|
||||
return new SmallScannerCallableFactory() {
|
||||
@Override
|
||||
public ScannerCallableWithReplicas getCallable(ClusterConnection connection, TableName table,
|
||||
Scan scan, ScanMetrics scanMetrics, byte[] localStartKey, int cacheNum,
|
||||
RpcControllerFactory controllerFactory, ExecutorService pool,
|
||||
int primaryOperationTimeout, int retries, int scannerTimeout, Configuration conf,
|
||||
RpcRetryingCaller<Result[]> caller) {
|
||||
return callableWithReplicas;
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testContextPresent() throws Exception {
|
||||
final KeyValue kv1 = new KeyValue("row1".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum), kv2 = new KeyValue("row2".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum), kv3 = new KeyValue("row3".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum);
|
||||
|
||||
ScannerCallableWithReplicas callableWithReplicas = Mockito
|
||||
.mock(ScannerCallableWithReplicas.class);
|
||||
|
||||
// Mock out the RpcCaller
|
||||
@SuppressWarnings("unchecked")
|
||||
RpcRetryingCaller<Result[]> caller = Mockito.mock(RpcRetryingCaller.class);
|
||||
// Return the mock from the factory
|
||||
Mockito.when(rpcFactory.<Result[]> newCaller()).thenReturn(caller);
|
||||
|
||||
// Intentionally leave a "default" caching size in the Scan. No matter the value, we
|
||||
// should continue based on the server context
|
||||
|
||||
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
|
||||
|
||||
try (ClientSmallReversedScanner csrs = new ClientSmallReversedScanner(conf, scan,
|
||||
TableName.valueOf("table"), clusterConn, rpcFactory, controllerFactory, pool,
|
||||
Integer.MAX_VALUE)) {
|
||||
|
||||
csrs.setScannerCallableFactory(factory);
|
||||
|
||||
// Return some data the first time, less the second, and none after that
|
||||
Mockito.when(caller.callWithoutRetries(callableWithReplicas, csrs.getScannerTimeout()))
|
||||
.thenAnswer(new Answer<Result[]>() {
|
||||
int count = 0;
|
||||
|
||||
@Override
|
||||
public Result[] answer(InvocationOnMock invocation) {
|
||||
Result[] results;
|
||||
if (0 == count) {
|
||||
results = new Result[] {Result.create(new Cell[] {kv3}),
|
||||
Result.create(new Cell[] {kv2})};
|
||||
} else if (1 == count) {
|
||||
results = new Result[] {Result.create(new Cell[] {kv1})};
|
||||
} else {
|
||||
results = new Result[0];
|
||||
}
|
||||
count++;
|
||||
return results;
|
||||
}
|
||||
});
|
||||
|
||||
// Pass back the context always
|
||||
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(true);
|
||||
// Only have more results the first time
|
||||
Mockito.when(callableWithReplicas.getServerHasMoreResults()).thenAnswer(
|
||||
createTrueThenFalseAnswer());
|
||||
|
||||
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
|
||||
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
|
||||
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
|
||||
// Trigger the "no more data" branch for #nextScanner(...)
|
||||
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
|
||||
|
||||
csrs.loadCache();
|
||||
|
||||
List<Result> results = csrs.cache;
|
||||
Iterator<Result> iter = results.iterator();
|
||||
assertEquals(3, results.size());
|
||||
for (int i = 3; i >= 1 && iter.hasNext(); i--) {
|
||||
Result result = iter.next();
|
||||
byte[] row = result.getRow();
|
||||
assertEquals("row" + i, new String(row, StandardCharsets.UTF_8));
|
||||
assertEquals(1, result.getMap().size());
|
||||
}
|
||||
assertTrue(csrs.closed);
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testNoContextFewerRecords() throws Exception {
|
||||
final KeyValue kv1 = new KeyValue("row1".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum), kv2 = new KeyValue("row2".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum), kv3 = new KeyValue("row3".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum);
|
||||
|
||||
ScannerCallableWithReplicas callableWithReplicas = Mockito
|
||||
.mock(ScannerCallableWithReplicas.class);
|
||||
|
||||
// While the server returns 2 records per batch, we expect more records.
|
||||
scan.setCaching(2);
|
||||
|
||||
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
|
||||
|
||||
try (ClientSmallReversedScanner csrs = new ClientSmallReversedScanner(conf, scan,
|
||||
TableName.valueOf("table"), clusterConn, rpcFactory, controllerFactory, pool,
|
||||
Integer.MAX_VALUE)) {
|
||||
|
||||
csrs.setScannerCallableFactory(factory);
|
||||
|
||||
// Return some data the first time, less the second, and none after that
|
||||
Mockito.when(caller.callWithoutRetries(callableWithReplicas, csrs.getScannerTimeout()))
|
||||
.thenAnswer(new Answer<Result[]>() {
|
||||
int count = 0;
|
||||
|
||||
@Override
|
||||
public Result[] answer(InvocationOnMock invocation) {
|
||||
Result[] results;
|
||||
if (0 == count) {
|
||||
results = new Result[] {Result.create(new Cell[] {kv3}),
|
||||
Result.create(new Cell[] {kv2})};
|
||||
} else if (1 == count) {
|
||||
// Return fewer records than expected (2)
|
||||
results = new Result[] {Result.create(new Cell[] {kv1})};
|
||||
} else {
|
||||
throw new RuntimeException("Should not fetch a third batch from the server");
|
||||
}
|
||||
count++;
|
||||
return results;
|
||||
}
|
||||
});
|
||||
|
||||
// Server doesn't return the context
|
||||
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(false);
|
||||
// getServerHasMoreResults shouldn't be called when hasMoreResultsContext returns false
|
||||
Mockito.when(callableWithReplicas.getServerHasMoreResults())
|
||||
.thenThrow(new RuntimeException("Should not be called"));
|
||||
|
||||
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
|
||||
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
|
||||
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
|
||||
// Trigger the "no more data" branch for #nextScanner(...)
|
||||
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
|
||||
|
||||
csrs.loadCache();
|
||||
|
||||
List<Result> results = csrs.cache;
|
||||
Iterator<Result> iter = results.iterator();
|
||||
assertEquals(2, results.size());
|
||||
for (int i = 3; i >= 2 && iter.hasNext(); i--) {
|
||||
Result result = iter.next();
|
||||
byte[] row = result.getRow();
|
||||
assertEquals("row" + i, new String(row, StandardCharsets.UTF_8));
|
||||
assertEquals(1, result.getMap().size());
|
||||
}
|
||||
|
||||
// "consume" the Results
|
||||
results.clear();
|
||||
|
||||
csrs.loadCache();
|
||||
|
||||
assertEquals(1, results.size());
|
||||
Result result = results.get(0);
|
||||
assertEquals("row1", new String(result.getRow(), StandardCharsets.UTF_8));
|
||||
assertEquals(1, result.getMap().size());
|
||||
|
||||
assertTrue(csrs.closed);
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testNoContextNoRecords() throws Exception {
|
||||
ScannerCallableWithReplicas callableWithReplicas = Mockito
|
||||
.mock(ScannerCallableWithReplicas.class);
|
||||
|
||||
// While the server return 2 records per RPC, we expect there to be more records.
|
||||
scan.setCaching(2);
|
||||
|
||||
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
|
||||
|
||||
try (ClientSmallReversedScanner csrs = new ClientSmallReversedScanner(conf, scan,
|
||||
TableName.valueOf("table"), clusterConn, rpcFactory, controllerFactory, pool,
|
||||
Integer.MAX_VALUE)) {
|
||||
|
||||
csrs.setScannerCallableFactory(factory);
|
||||
|
||||
// Return some data the first time, less the second, and none after that
|
||||
Mockito.when(caller.callWithoutRetries(callableWithReplicas, csrs.getScannerTimeout()))
|
||||
.thenReturn(new Result[0]);
|
||||
|
||||
// Server doesn't return the context
|
||||
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(false);
|
||||
// Only have more results the first time
|
||||
Mockito.when(callableWithReplicas.getServerHasMoreResults())
|
||||
.thenThrow(new RuntimeException("Should not be called"));
|
||||
|
||||
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
|
||||
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
|
||||
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
|
||||
// Trigger the "no more data" branch for #nextScanner(...)
|
||||
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
|
||||
|
||||
csrs.loadCache();
|
||||
|
||||
assertEquals(0, csrs.cache.size());
|
||||
assertTrue(csrs.closed);
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testContextNoRecords() throws Exception {
|
||||
ScannerCallableWithReplicas callableWithReplicas = Mockito
|
||||
.mock(ScannerCallableWithReplicas.class);
|
||||
|
||||
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
|
||||
|
||||
try (ClientSmallReversedScanner csrs = new ClientSmallReversedScanner(conf, scan,
|
||||
TableName.valueOf("table"), clusterConn, rpcFactory, controllerFactory, pool,
|
||||
Integer.MAX_VALUE)) {
|
||||
|
||||
csrs.setScannerCallableFactory(factory);
|
||||
|
||||
// Return some data the first time, less the second, and none after that
|
||||
Mockito.when(caller.callWithoutRetries(callableWithReplicas, csrs.getScannerTimeout()))
|
||||
.thenReturn(new Result[0]);
|
||||
|
||||
// Server doesn't return the context
|
||||
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(true);
|
||||
// Only have more results the first time
|
||||
Mockito.when(callableWithReplicas.getServerHasMoreResults())
|
||||
.thenReturn(false);
|
||||
|
||||
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
|
||||
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
|
||||
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
|
||||
// Trigger the "no more data" branch for #nextScanner(...)
|
||||
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
|
||||
|
||||
csrs.loadCache();
|
||||
|
||||
assertEquals(0, csrs.cache.size());
|
||||
assertTrue(csrs.closed);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,339 @@
|
|||
/**
|
||||
* 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.assertTrue;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.nio.charset.StandardCharsets;
|
||||
import java.util.List;
|
||||
import java.util.concurrent.ExecutorService;
|
||||
import java.util.concurrent.Executors;
|
||||
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.hbase.Cell;
|
||||
import org.apache.hadoop.hbase.HConstants;
|
||||
import org.apache.hadoop.hbase.HRegionInfo;
|
||||
import org.apache.hadoop.hbase.KeyValue;
|
||||
import org.apache.hadoop.hbase.KeyValue.Type;
|
||||
import org.apache.hadoop.hbase.TableName;
|
||||
import org.apache.hadoop.hbase.client.ClientSmallScanner.SmallScannerCallableFactory;
|
||||
import org.apache.hadoop.hbase.client.metrics.ScanMetrics;
|
||||
import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
|
||||
import org.apache.hadoop.hbase.testclassification.SmallTests;
|
||||
import org.junit.After;
|
||||
import org.junit.Before;
|
||||
import org.junit.Test;
|
||||
import org.junit.experimental.categories.Category;
|
||||
import org.mockito.Mockito;
|
||||
import org.mockito.invocation.InvocationOnMock;
|
||||
import org.mockito.stubbing.Answer;
|
||||
|
||||
/**
|
||||
* Test the ClientSmallScanner.
|
||||
*/
|
||||
@Category(SmallTests.class)
|
||||
public class TestClientSmallScanner {
|
||||
|
||||
Scan scan;
|
||||
ExecutorService pool;
|
||||
Configuration conf;
|
||||
|
||||
ClusterConnection clusterConn;
|
||||
RpcRetryingCallerFactory rpcFactory;
|
||||
RpcControllerFactory controllerFactory;
|
||||
RpcRetryingCaller<Result[]> caller;
|
||||
|
||||
@Before
|
||||
@SuppressWarnings({"deprecation", "unchecked"})
|
||||
public void setup() throws IOException {
|
||||
clusterConn = Mockito.mock(ClusterConnection.class);
|
||||
rpcFactory = Mockito.mock(RpcRetryingCallerFactory.class);
|
||||
controllerFactory = Mockito.mock(RpcControllerFactory.class);
|
||||
pool = Executors.newSingleThreadExecutor();
|
||||
scan = new Scan();
|
||||
conf = new Configuration();
|
||||
Mockito.when(clusterConn.getConfiguration()).thenReturn(conf);
|
||||
// Mock out the RpcCaller
|
||||
caller = Mockito.mock(RpcRetryingCaller.class);
|
||||
// Return the mock from the factory
|
||||
Mockito.when(rpcFactory.<Result[]> newCaller()).thenReturn(caller);
|
||||
}
|
||||
|
||||
@After
|
||||
public void teardown() {
|
||||
if (null != pool) {
|
||||
pool.shutdownNow();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a simple Answer which returns true the first time, and false every time after.
|
||||
*/
|
||||
private Answer<Boolean> createTrueThenFalseAnswer() {
|
||||
return new Answer<Boolean>() {
|
||||
boolean first = true;
|
||||
|
||||
@Override
|
||||
public Boolean answer(InvocationOnMock invocation) {
|
||||
if (first) {
|
||||
first = false;
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
private SmallScannerCallableFactory getFactory(
|
||||
final ScannerCallableWithReplicas callableWithReplicas) {
|
||||
return new SmallScannerCallableFactory() {
|
||||
@Override
|
||||
public ScannerCallableWithReplicas getCallable(ClusterConnection connection, TableName table,
|
||||
Scan scan, ScanMetrics scanMetrics, byte[] localStartKey, int cacheNum,
|
||||
RpcControllerFactory controllerFactory, ExecutorService pool,
|
||||
int primaryOperationTimeout, int retries, int scannerTimeout, Configuration conf,
|
||||
RpcRetryingCaller<Result[]> caller) {
|
||||
return callableWithReplicas;
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testContextPresent() throws Exception {
|
||||
final KeyValue kv1 = new KeyValue("row1".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum), kv2 = new KeyValue("row2".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum), kv3 = new KeyValue("row3".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum);
|
||||
|
||||
ScannerCallableWithReplicas callableWithReplicas = Mockito
|
||||
.mock(ScannerCallableWithReplicas.class);
|
||||
|
||||
// Mock out the RpcCaller
|
||||
@SuppressWarnings("unchecked")
|
||||
RpcRetryingCaller<Result[]> caller = Mockito.mock(RpcRetryingCaller.class);
|
||||
// Return the mock from the factory
|
||||
Mockito.when(rpcFactory.<Result[]> newCaller()).thenReturn(caller);
|
||||
|
||||
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
|
||||
|
||||
// Intentionally leave a "default" caching size in the Scan. No matter the value, we
|
||||
// should continue based on the server context
|
||||
|
||||
try (ClientSmallScanner css = new ClientSmallScanner(conf, scan, TableName.valueOf("table"),
|
||||
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
|
||||
|
||||
css.setScannerCallableFactory(factory);
|
||||
|
||||
// Return some data the first time, less the second, and none after that
|
||||
Mockito.when(caller.callWithoutRetries(callableWithReplicas, css.getScannerTimeout()))
|
||||
.thenAnswer(new Answer<Result[]>() {
|
||||
int count = 0;
|
||||
|
||||
@Override
|
||||
public Result[] answer(InvocationOnMock invocation) {
|
||||
Result[] results;
|
||||
if (0 == count) {
|
||||
results = new Result[] {Result.create(new Cell[] {kv1}),
|
||||
Result.create(new Cell[] {kv2})};
|
||||
} else if (1 == count) {
|
||||
results = new Result[] {Result.create(new Cell[] {kv3})};
|
||||
} else {
|
||||
results = new Result[0];
|
||||
}
|
||||
count++;
|
||||
return results;
|
||||
}
|
||||
});
|
||||
|
||||
// Pass back the context always
|
||||
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(true);
|
||||
// Only have more results the first time
|
||||
Mockito.when(callableWithReplicas.getServerHasMoreResults()).thenAnswer(
|
||||
createTrueThenFalseAnswer());
|
||||
|
||||
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
|
||||
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
|
||||
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
|
||||
// Trigger the "no more data" branch for #nextScanner(...)
|
||||
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
|
||||
|
||||
css.loadCache();
|
||||
|
||||
List<Result> results = css.cache;
|
||||
assertEquals(3, results.size());
|
||||
for (int i = 1; i <= 3; i++) {
|
||||
Result result = results.get(i - 1);
|
||||
byte[] row = result.getRow();
|
||||
assertEquals("row" + i, new String(row, StandardCharsets.UTF_8));
|
||||
assertEquals(1, result.getMap().size());
|
||||
}
|
||||
|
||||
assertTrue(css.closed);
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testNoContextFewerRecords() throws Exception {
|
||||
final KeyValue kv1 = new KeyValue("row1".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum), kv2 = new KeyValue("row2".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum), kv3 = new KeyValue("row3".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
|
||||
Type.Maximum);
|
||||
|
||||
ScannerCallableWithReplicas callableWithReplicas = Mockito
|
||||
.mock(ScannerCallableWithReplicas.class);
|
||||
|
||||
// While the server returns 2 records per batch, we expect more records.
|
||||
scan.setCaching(2);
|
||||
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
|
||||
|
||||
try (ClientSmallScanner css = new ClientSmallScanner(conf, scan, TableName.valueOf("table"),
|
||||
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
|
||||
|
||||
css.setScannerCallableFactory(factory);
|
||||
// Return some data the first time, less the second, and none after that
|
||||
Mockito.when(caller.callWithoutRetries(callableWithReplicas, css.getScannerTimeout()))
|
||||
.thenAnswer(new Answer<Result[]>() {
|
||||
int count = 0;
|
||||
|
||||
@Override
|
||||
public Result[] answer(InvocationOnMock invocation) {
|
||||
Result[] results;
|
||||
if (0 == count) {
|
||||
results = new Result[] {Result.create(new Cell[] {kv1}),
|
||||
Result.create(new Cell[] {kv2})};
|
||||
} else if (1 == count) {
|
||||
// Return fewer records than expected (2)
|
||||
results = new Result[] {Result.create(new Cell[] {kv3})};
|
||||
} else {
|
||||
throw new RuntimeException("Should not fetch a third batch from the server");
|
||||
}
|
||||
count++;
|
||||
return results;
|
||||
}
|
||||
});
|
||||
|
||||
// Server doesn't return the context
|
||||
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(false);
|
||||
// Only have more results the first time
|
||||
Mockito.when(callableWithReplicas.getServerHasMoreResults()).thenThrow(
|
||||
new RuntimeException("Should not be called"));
|
||||
|
||||
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
|
||||
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
|
||||
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
|
||||
// Trigger the "no more data" branch for #nextScanner(...)
|
||||
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
|
||||
|
||||
css.loadCache();
|
||||
|
||||
List<Result> results = css.cache;
|
||||
assertEquals(2, results.size());
|
||||
for (int i = 1; i <= 2; i++) {
|
||||
Result result = results.get(i - 1);
|
||||
byte[] row = result.getRow();
|
||||
assertEquals("row" + i, new String(row, StandardCharsets.UTF_8));
|
||||
assertEquals(1, result.getMap().size());
|
||||
}
|
||||
|
||||
// "consume" the results we verified
|
||||
results.clear();
|
||||
|
||||
css.loadCache();
|
||||
|
||||
assertEquals(1, results.size());
|
||||
Result result = results.get(0);
|
||||
assertEquals("row3", new String(result.getRow(), StandardCharsets.UTF_8));
|
||||
assertEquals(1, result.getMap().size());
|
||||
assertTrue(css.closed);
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testNoContextNoRecords() throws Exception {
|
||||
ScannerCallableWithReplicas callableWithReplicas = Mockito
|
||||
.mock(ScannerCallableWithReplicas.class);
|
||||
|
||||
// While the server return 2 records per RPC, we expect there to be more records.
|
||||
scan.setCaching(2);
|
||||
|
||||
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
|
||||
|
||||
try (ClientSmallScanner css = new ClientSmallScanner(conf, scan, TableName.valueOf("table"),
|
||||
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
|
||||
|
||||
css.setScannerCallableFactory(factory);
|
||||
|
||||
// Return some data the first time, less the second, and none after that
|
||||
Mockito.when(caller.callWithoutRetries(callableWithReplicas, css.getScannerTimeout()))
|
||||
.thenReturn(new Result[0]);
|
||||
|
||||
// Server doesn't return the context
|
||||
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(false);
|
||||
// Only have more results the first time
|
||||
Mockito.when(callableWithReplicas.getServerHasMoreResults()).thenThrow(
|
||||
new RuntimeException("Should not be called"));
|
||||
|
||||
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
|
||||
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
|
||||
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
|
||||
// Trigger the "no more data" branch for #nextScanner(...)
|
||||
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
|
||||
|
||||
css.loadCache();
|
||||
|
||||
assertEquals(0, css.cache.size());
|
||||
assertTrue(css.closed);
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testContextNoRecords() throws Exception {
|
||||
ScannerCallableWithReplicas callableWithReplicas = Mockito
|
||||
.mock(ScannerCallableWithReplicas.class);
|
||||
|
||||
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
|
||||
|
||||
try (ClientSmallScanner css = new ClientSmallScanner(conf, scan, TableName.valueOf("table"),
|
||||
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
|
||||
|
||||
css.setScannerCallableFactory(factory);
|
||||
|
||||
// Return some data the first time, less the second, and none after that
|
||||
Mockito.when(caller.callWithoutRetries(callableWithReplicas, css.getScannerTimeout()))
|
||||
.thenReturn(new Result[0]);
|
||||
|
||||
// Server doesn't return the context
|
||||
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(true);
|
||||
// Only have more results the first time
|
||||
Mockito.when(callableWithReplicas.getServerHasMoreResults()).thenReturn(false);
|
||||
|
||||
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
|
||||
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
|
||||
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
|
||||
// Trigger the "no more data" branch for #nextScanner(...)
|
||||
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
|
||||
|
||||
css.loadCache();
|
||||
|
||||
assertEquals(0, css.cache.size());
|
||||
assertTrue(css.closed);
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue