| /* |
| * 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.phoenix.iterate; |
| |
| import static org.apache.phoenix.monitoring.GlobalClientMetrics.GLOBAL_SCAN_BYTES; |
| |
| import java.io.IOException; |
| import java.sql.SQLException; |
| import java.util.List; |
| |
| import org.apache.hadoop.hbase.Cell; |
| import org.apache.hadoop.hbase.KeyValue; |
| import org.apache.hadoop.hbase.KeyValueUtil; |
| import org.apache.hadoop.hbase.client.Result; |
| import org.apache.hadoop.hbase.client.ResultScanner; |
| import org.apache.phoenix.monitoring.CombinableMetric; |
| import org.apache.phoenix.monitoring.CombinableMetric.NoOpRequestMetric; |
| import org.apache.phoenix.monitoring.GlobalClientMetrics; |
| import org.apache.phoenix.schema.tuple.ResultTuple; |
| import org.apache.phoenix.schema.tuple.Tuple; |
| import org.apache.phoenix.util.ServerUtil; |
| |
| public class ScanningResultIterator implements ResultIterator { |
| private final ResultScanner scanner; |
| private final CombinableMetric scanMetrics; |
| |
| public ScanningResultIterator(ResultScanner scanner, CombinableMetric scanMetrics) { |
| this.scanner = scanner; |
| this.scanMetrics = scanMetrics; |
| } |
| |
| @Override |
| public void close() throws SQLException { |
| scanner.close(); |
| } |
| |
| @Override |
| public Tuple next() throws SQLException { |
| try { |
| Result result = scanner.next(); |
| if (result == null) { |
| close(); // Free up resources early |
| return null; |
| } |
| calculateScanSize(result); |
| // TODO: use ResultTuple.setResult(result)? |
| // Need to create a new one if holding on to it (i.e. OrderedResultIterator) |
| return new ResultTuple(result); |
| } catch (IOException e) { |
| throw ServerUtil.parseServerException(e); |
| } |
| } |
| |
| @Override |
| public void explain(List<String> planSteps) { |
| } |
| |
| @Override |
| public String toString() { |
| return "ScanningResultIterator [scanner=" + scanner + "]"; |
| } |
| |
| private void calculateScanSize(Result result) { |
| if (GlobalClientMetrics.isMetricsEnabled() || scanMetrics != NoOpRequestMetric.INSTANCE) { |
| if (result != null) { |
| Cell[] cells = result.rawCells(); |
| long scanResultSize = 0; |
| for (Cell cell : cells) { |
| KeyValue kv = KeyValueUtil.ensureKeyValue(cell); |
| scanResultSize += kv.heapSize(); |
| } |
| scanMetrics.change(scanResultSize); |
| GLOBAL_SCAN_BYTES.update(scanResultSize); |
| } |
| } |
| } |
| |
| |
| public ResultScanner getScanner() { |
| return scanner; |
| } |
| } |