| /* |
| * 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.eagle.log.entity.index; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.eagle.common.config.EagleConfigFactory; |
| import org.apache.eagle.log.entity.HBaseInternalLogHelper; |
| import org.apache.eagle.log.entity.InternalLog; |
| import org.apache.hadoop.hbase.client.Get; |
| import org.apache.hadoop.hbase.client.HTableFactory; |
| import org.apache.hadoop.hbase.client.HTableInterface; |
| import org.apache.hadoop.hbase.client.Result; |
| |
| import org.apache.eagle.log.entity.meta.EntityDefinition; |
| |
| public class RowKeyLogReader extends IndexLogReader { |
| private final EntityDefinition ed; |
| private final List<byte[]> rowkeys; |
| private final byte[][] qualifiers; |
| private HTableInterface tbl; |
| private boolean isOpen = false; |
| private Result[] entityResult; |
| private int getIndex = -1; |
| |
| public RowKeyLogReader(EntityDefinition ed, byte[] rowkey) { |
| this.ed = ed; |
| this.rowkeys = new ArrayList<>(); |
| this.rowkeys.add(rowkey); |
| this.qualifiers = null; |
| } |
| |
| public RowKeyLogReader(EntityDefinition ed, byte[] rowkey, byte[][] qualifiers) { |
| this.ed = ed; |
| this.rowkeys = new ArrayList<>(); |
| this.rowkeys.add(rowkey); |
| this.qualifiers = qualifiers; |
| } |
| |
| public RowKeyLogReader(EntityDefinition ed, List<byte[]> rowkeys, byte[][] qualifiers) { |
| this.ed = ed; |
| this.rowkeys = rowkeys; |
| this.qualifiers = qualifiers; |
| } |
| |
| @Override |
| public void open() throws IOException { |
| if (isOpen) { |
| return; // silently return |
| } |
| try { |
| tbl = EagleConfigFactory.load().getHTable(ed.getTable()); |
| } catch (RuntimeException ex) { |
| throw new IOException(ex); |
| } |
| final byte[] family = ed.getColumnFamily().getBytes(); |
| List<Get> gets = new ArrayList<>(this.rowkeys.size()); |
| |
| for (byte[] rowkey : rowkeys) { |
| Get get = new Get(rowkey); |
| get.addFamily(family); |
| |
| if (qualifiers != null) { |
| for (byte[] qualifier : qualifiers) { |
| get.addColumn(family, qualifier); |
| } |
| } |
| |
| gets.add(get); |
| } |
| |
| entityResult = tbl.get(gets); |
| isOpen = true; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| if (tbl != null) { |
| new HTableFactory().releaseHTableInterface(tbl); |
| } |
| } |
| |
| @Override |
| public InternalLog read() throws IOException { |
| if (entityResult == null || entityResult.length == 0 || this.getIndex >= entityResult.length - 1) { |
| return null; |
| } |
| getIndex++; |
| InternalLog t = HBaseInternalLogHelper.parse(ed, entityResult[getIndex], this.qualifiers); |
| return t; |
| } |
| } |