| /** |
| * 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.sqoop.mapreduce.netezza; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configurable; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.hadoop.mapreduce.JobContext; |
| import org.apache.sqoop.manager.NetezzaManager; |
| import org.apache.sqoop.mapreduce.DBWritable; |
| import org.apache.sqoop.mapreduce.db.DataDrivenDBInputFormat; |
| import org.apache.sqoop.mapreduce.db.netezza.NetezzaDBDataSliceSplitter; |
| |
| import org.apache.sqoop.config.ConfigurationHelper; |
| |
| /** |
| * Netezza specific DB input format. |
| */ |
| public class NetezzaDataDrivenDBInputFormat<T extends DBWritable> extends |
| DataDrivenDBInputFormat<T> implements Configurable { |
| private static final Log LOG = LogFactory |
| .getLog(NetezzaDataDrivenDBInputFormat.class); |
| |
| @Override |
| public List<InputSplit> getSplits(JobContext job) throws IOException { |
| int numMappers = ConfigurationHelper.getJobNumMaps(job); |
| |
| String boundaryQuery = getDBConf().getInputBoundingQuery(); |
| // Resort to base class if |
| // dataslice aligned import is not requested |
| // Not table extract |
| // No boundary query |
| // Only one mapper. |
| if (!getConf().getBoolean( |
| NetezzaManager.NETEZZA_DATASLICE_ALIGNED_ACCESS_OPT, false) |
| || getDBConf().getInputTableName() == null |
| || numMappers == 1 |
| || (boundaryQuery != null && !boundaryQuery.isEmpty())) { |
| return super.getSplits(job); |
| } |
| |
| // Generate a splitter that splits only on datasliceid. It is an |
| // integer split. We will just use the lower bounding query to specify |
| // the restriction of dataslice and set the upper bound to a constant |
| |
| NetezzaDBDataSliceSplitter splitter = new NetezzaDBDataSliceSplitter(); |
| |
| return splitter.split(getConf(), null, null); |
| } |
| } |