| /** |
| * 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.testutil; |
| |
| import java.io.IOException; |
| |
| import java.util.Map; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.MapReduceBase; |
| import org.apache.hadoop.mapred.Mapper; |
| import org.apache.hadoop.mapred.OutputCollector; |
| import org.apache.hadoop.mapred.Reporter; |
| import org.apache.sqoop.lib.SqoopRecord; |
| import org.apache.hadoop.util.ReflectionUtils; |
| |
| /** |
| * Test harness mapper. Instantiate the user's specific type, explicitly |
| * set the value of a field with setField(), and read the field value |
| * back via the field map. Throw an IOException if it doesn't get set |
| * correctly. |
| */ |
| public class ExplicitSetMapper extends MapReduceBase |
| implements Mapper<LongWritable, Text, Text, NullWritable> { |
| |
| public static final Log LOG = LogFactory.getLog( |
| ExplicitSetMapper.class.getName()); |
| |
| public static final String USER_TYPE_NAME_KEY = "sqoop.user.class"; |
| public static final String SET_COL_KEY = "sqoop.explicit.set.col"; |
| public static final String SET_VAL_KEY = "sqoop.explicit.set.val"; |
| |
| private SqoopRecord userRecord; |
| private String setCol; |
| private String setVal; |
| |
| public void configure(JobConf job) { |
| String userTypeName = job.get(USER_TYPE_NAME_KEY); |
| if (null == userTypeName) { |
| throw new RuntimeException("Unconfigured parameter: " |
| + USER_TYPE_NAME_KEY); |
| } |
| |
| setCol = job.get(SET_COL_KEY); |
| setVal = job.get(SET_VAL_KEY); |
| |
| LOG.info("User type name set to " + userTypeName); |
| LOG.info("Will try to set col " + setCol + " to " + setVal); |
| |
| this.userRecord = null; |
| |
| try { |
| Configuration conf = new Configuration(); |
| Class userClass = Class.forName(userTypeName, true, |
| Thread.currentThread().getContextClassLoader()); |
| this.userRecord = |
| (SqoopRecord) ReflectionUtils.newInstance(userClass, conf); |
| } catch (ClassNotFoundException cnfe) { |
| // handled by the next block. |
| LOG.error("ClassNotFound exception: " + cnfe.toString()); |
| } catch (Exception e) { |
| LOG.error("Got an exception reflecting user class: " + e.toString()); |
| } |
| |
| if (null == this.userRecord) { |
| LOG.error("Could not instantiate user record of type " + userTypeName); |
| throw new RuntimeException("Could not instantiate user record of type " |
| + userTypeName); |
| } |
| } |
| |
| public void map(LongWritable key, Text val, |
| OutputCollector<Text, NullWritable> out, Reporter r) throws IOException { |
| |
| // Try to set the field. |
| userRecord.setField(setCol, setVal); |
| Map<String, Object> fieldVals = userRecord.getFieldMap(); |
| if (!fieldVals.get(setCol).equals(setVal)) { |
| throw new IOException("Could not set column value! Got back " |
| + fieldVals.get(setCol)); |
| } else { |
| LOG.info("Correctly changed value for col " + setCol + " to " + setVal); |
| } |
| } |
| } |
| |