| /** |
| * 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 org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.HBaseTestingUtility; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.ipc.BlockingRpcCallback; |
| import org.apache.hadoop.hbase.ipc.HBaseRpcController; |
| import org.apache.hadoop.hbase.ipc.HBaseRpcControllerImpl; |
| import org.apache.hadoop.hbase.testclassification.MediumTests; |
| import org.apache.hadoop.hbase.testclassification.RegionServerTests; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| import org.apache.hbase.thirdparty.com.google.protobuf.ServiceException; |
| |
| import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter; |
| import org.apache.hadoop.hbase.shaded.protobuf.ResponseConverter; |
| import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos; |
| import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanRequest; |
| import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanResponse; |
| |
| /** |
| * Testcase to make sure that we do not close scanners if ScanRequest.numberOfRows is zero. See |
| * HBASE-18042 for more details. |
| */ |
| @Category({ RegionServerTests.class, MediumTests.class }) |
| public class TestScanWithoutFetchingData { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestScanWithoutFetchingData.class); |
| |
| private static final HBaseTestingUtility UTIL = new HBaseTestingUtility(); |
| |
| private static final TableName TABLE_NAME = TableName.valueOf("test"); |
| |
| private static final byte[] CF = Bytes.toBytes("cf"); |
| |
| private static final byte[] CQ = Bytes.toBytes("cq"); |
| |
| private static final int COUNT = 10; |
| |
| private static RegionInfo HRI; |
| |
| private static AsyncConnectionImpl CONN; |
| |
| private static ClientProtos.ClientService.Interface STUB; |
| |
| @BeforeClass |
| public static void setUp() throws Exception { |
| UTIL.startMiniCluster(1); |
| try (Table table = UTIL.createTable(TABLE_NAME, CF)) { |
| for (int i = 0; i < COUNT; i++) { |
| table.put(new Put(Bytes.toBytes(i)).addColumn(CF, CQ, Bytes.toBytes(i))); |
| } |
| } |
| HRI = UTIL.getAdmin().getRegions(TABLE_NAME).get(0); |
| CONN = |
| (AsyncConnectionImpl) ConnectionFactory.createAsyncConnection(UTIL.getConfiguration()).get(); |
| STUB = CONN.getRegionServerStub(UTIL.getHBaseCluster().getRegionServer(0).getServerName()); |
| } |
| |
| @AfterClass |
| public static void tearDown() throws Exception { |
| UTIL.shutdownMiniCluster(); |
| } |
| |
| private ScanResponse scan(HBaseRpcController hrc, ScanRequest req) throws IOException { |
| BlockingRpcCallback<ScanResponse> callback = new BlockingRpcCallback<>(); |
| STUB.scan(hrc, req, callback); |
| return callback.get(); |
| } |
| |
| private void assertResult(int row, Result result) { |
| assertEquals(row, Bytes.toInt(result.getRow())); |
| assertEquals(row, Bytes.toInt(result.getValue(CF, CQ))); |
| } |
| |
| @Test |
| public void test() throws ServiceException, IOException { |
| Scan scan = new Scan(); |
| ScanRequest req = RequestConverter.buildScanRequest(HRI.getRegionName(), scan, 0, false); |
| HBaseRpcController hrc = new HBaseRpcControllerImpl(); |
| ScanResponse resp = scan(hrc, req); |
| assertTrue(resp.getMoreResults()); |
| assertTrue(resp.getMoreResultsInRegion()); |
| assertEquals(0, ResponseConverter.getResults(hrc.cellScanner(), resp).length); |
| long scannerId = resp.getScannerId(); |
| int nextCallSeq = 0; |
| // test normal next |
| for (int i = 0; i < COUNT / 2; i++) { |
| req = RequestConverter.buildScanRequest(scannerId, 1, false, nextCallSeq++, false, false, -1); |
| hrc.reset(); |
| resp = scan(hrc, req); |
| assertTrue(resp.getMoreResults()); |
| assertTrue(resp.getMoreResultsInRegion()); |
| Result[] results = ResponseConverter.getResults(hrc.cellScanner(), resp); |
| assertEquals(1, results.length); |
| assertResult(i, results[0]); |
| } |
| // test zero next |
| req = RequestConverter.buildScanRequest(scannerId, 0, false, nextCallSeq++, false, false, -1); |
| hrc.reset(); |
| resp = scan(hrc, req); |
| assertTrue(resp.getMoreResults()); |
| assertTrue(resp.getMoreResultsInRegion()); |
| assertEquals(0, ResponseConverter.getResults(hrc.cellScanner(), resp).length); |
| for (int i = COUNT / 2; i < COUNT; i++) { |
| req = RequestConverter.buildScanRequest(scannerId, 1, false, nextCallSeq++, false, false, -1); |
| hrc.reset(); |
| resp = scan(hrc, req); |
| assertTrue(resp.getMoreResults()); |
| assertEquals(i != COUNT - 1, resp.getMoreResultsInRegion()); |
| Result[] results = ResponseConverter.getResults(hrc.cellScanner(), resp); |
| assertEquals(1, results.length); |
| assertResult(i, results[0]); |
| } |
| // close |
| req = RequestConverter.buildScanRequest(scannerId, 0, true, false); |
| hrc.reset(); |
| resp = scan(hrc, req); |
| } |
| } |