| /* |
| * 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.accumulo.test; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import org.apache.accumulo.core.client.Accumulo; |
| import org.apache.accumulo.core.client.AccumuloClient; |
| import org.apache.accumulo.core.client.BatchScanner; |
| import org.apache.accumulo.core.client.BatchWriter; |
| import org.apache.accumulo.core.client.BatchWriterConfig; |
| import org.apache.accumulo.core.client.IteratorSetting; |
| import org.apache.accumulo.core.client.Scanner; |
| import org.apache.accumulo.core.data.Key; |
| import org.apache.accumulo.core.data.Mutation; |
| import org.apache.accumulo.core.data.Range; |
| import org.apache.accumulo.core.data.Value; |
| import org.apache.accumulo.core.security.Authorizations; |
| import org.apache.accumulo.harness.AccumuloClusterHarness; |
| import org.apache.accumulo.miniclusterImpl.MiniAccumuloConfigImpl; |
| import org.apache.accumulo.test.functional.YieldingIterator; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.Text; |
| import org.junit.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| // ACCUMULO-4643 |
| public class YieldScannersIT extends AccumuloClusterHarness { |
| Logger log = LoggerFactory.getLogger(YieldScannersIT.class); |
| private static final char START_ROW = 'a'; |
| |
| @Override |
| public int defaultTimeoutSeconds() { |
| return 60; |
| } |
| |
| @Override |
| public void configureMiniCluster(MiniAccumuloConfigImpl cfg, Configuration hadoopCoreSite) { |
| cfg.setNumTservers(1); |
| } |
| |
| @Test |
| public void testScan() throws Exception { |
| // make a table |
| final String tableName = getUniqueNames(1)[0]; |
| try (AccumuloClient client = Accumulo.newClient().from(getClientProps()).build()) { |
| client.tableOperations().create(tableName); |
| final BatchWriter writer = client.createBatchWriter(tableName, new BatchWriterConfig()); |
| for (int i = 0; i < 10; i++) { |
| byte[] row = {(byte) (START_ROW + i)}; |
| Mutation m = new Mutation(new Text(row)); |
| m.put("", "", ""); |
| writer.addMutation(m); |
| } |
| writer.flush(); |
| writer.close(); |
| |
| log.info("Creating scanner"); |
| // make a scanner for a table with 10 keys |
| try (Scanner scanner = client.createScanner(tableName, Authorizations.EMPTY)) { |
| final IteratorSetting cfg = new IteratorSetting(100, YieldingIterator.class); |
| scanner.addScanIterator(cfg); |
| |
| log.info("iterating"); |
| Iterator<Map.Entry<Key,Value>> it = scanner.iterator(); |
| int keyCount = 0; |
| int yieldNextCount = 0; |
| int yieldSeekCount = 0; |
| while (it.hasNext()) { |
| Map.Entry<Key,Value> next = it.next(); |
| log.info(Integer.toString(keyCount) + ": Got key " + next.getKey() + " with value " |
| + next.getValue()); |
| |
| // verify we got the expected key |
| char expected = (char) (START_ROW + keyCount); |
| assertEquals("Unexpected row", Character.toString(expected), |
| next.getKey().getRow().toString()); |
| |
| // determine whether we yielded on a next and seek |
| if ((keyCount & 1) != 0) { |
| yieldNextCount++; |
| yieldSeekCount++; |
| } |
| String[] value = next.getValue().toString().split(","); |
| assertEquals("Unexpected yield next count", Integer.toString(yieldNextCount), value[0]); |
| assertEquals("Unexpected yield seek count", Integer.toString(yieldSeekCount), value[1]); |
| assertEquals("Unexpected rebuild count", |
| Integer.toString(yieldNextCount + yieldSeekCount), value[2]); |
| |
| keyCount++; |
| } |
| assertEquals("Did not get the expected number of results", 10, keyCount); |
| } |
| } |
| } |
| |
| @Test |
| public void testBatchScan() throws Exception { |
| // make a table |
| final String tableName = getUniqueNames(1)[0]; |
| try (AccumuloClient client = Accumulo.newClient().from(getClientProps()).build()) { |
| client.tableOperations().create(tableName); |
| final BatchWriter writer = client.createBatchWriter(tableName, new BatchWriterConfig()); |
| for (int i = 0; i < 10; i++) { |
| byte[] row = {(byte) (START_ROW + i)}; |
| Mutation m = new Mutation(new Text(row)); |
| m.put("", "", ""); |
| writer.addMutation(m); |
| } |
| writer.flush(); |
| writer.close(); |
| |
| log.info("Creating batch scanner"); |
| // make a scanner for a table with 10 keys |
| try (BatchScanner scanner = client.createBatchScanner(tableName)) { |
| final IteratorSetting cfg = new IteratorSetting(100, YieldingIterator.class); |
| scanner.addScanIterator(cfg); |
| scanner.setRanges(Collections.singleton(new Range())); |
| |
| log.info("iterating"); |
| Iterator<Map.Entry<Key,Value>> it = scanner.iterator(); |
| int keyCount = 0; |
| int yieldNextCount = 0; |
| int yieldSeekCount = 0; |
| while (it.hasNext()) { |
| Map.Entry<Key,Value> next = it.next(); |
| log.info(Integer.toString(keyCount) + ": Got key " + next.getKey() + " with value " |
| + next.getValue()); |
| |
| // verify we got the expected key |
| char expected = (char) (START_ROW + keyCount); |
| assertEquals("Unexpected row", Character.toString(expected), |
| next.getKey().getRow().toString()); |
| |
| // determine whether we yielded on a next and seek |
| if ((keyCount & 1) != 0) { |
| yieldNextCount++; |
| yieldSeekCount++; |
| } |
| String[] value = next.getValue().toString().split(","); |
| assertEquals("Unexpected yield next count", Integer.toString(yieldNextCount), value[0]); |
| assertEquals("Unexpected yield seek count", Integer.toString(yieldSeekCount), value[1]); |
| assertEquals("Unexpected rebuild count", |
| Integer.toString(yieldNextCount + yieldSeekCount), value[2]); |
| |
| keyCount++; |
| } |
| assertEquals("Did not get the expected number of results", 10, keyCount); |
| } |
| } |
| } |
| } |