| /** |
| * 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.hbase; |
| |
| import com.cloudera.sqoop.lib.FieldMapProcessor; |
| import com.cloudera.sqoop.lib.FieldMappable; |
| import com.cloudera.sqoop.lib.ProcessingException; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configurable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.client.HTable; |
| import org.apache.hadoop.hbase.client.Put; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.hadoop.util.ReflectionUtils; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * SqoopRecordProcessor that performs an HBase "put" operation |
| * that contains all the fields of the record. |
| */ |
| public class HBasePutProcessor implements Closeable, Configurable, |
| FieldMapProcessor { |
| |
| public static final Log LOG = LogFactory.getLog( |
| HBasePutProcessor.class.getName()); |
| |
| /** Configuration key specifying the table to insert into. */ |
| public static final String TABLE_NAME_KEY = "sqoop.hbase.insert.table"; |
| |
| /** Configuration key specifying the column family to insert into. */ |
| public static final String COL_FAMILY_KEY = |
| "sqoop.hbase.insert.column.family"; |
| |
| /** Configuration key specifying the column of the input whose value |
| * should be used as the row id. |
| */ |
| public static final String ROW_KEY_COLUMN_KEY = |
| "sqoop.hbase.insert.row.key.column"; |
| |
| /** |
| * Configuration key specifying the PutTransformer implementation to use. |
| */ |
| public static final String TRANSFORMER_CLASS_KEY = |
| "sqoop.hbase.insert.put.transformer.class"; |
| |
| /** |
| * Configuration key to enable/disable hbase bulkLoad. |
| */ |
| public static final String BULK_LOAD_ENABLED_KEY = |
| "sqoop.hbase.bulk.load.enabled"; |
| |
| /** Configuration key to specify whether to add the row key column into |
| * HBase. Set to false by default. |
| */ |
| public static final String ADD_ROW_KEY = "sqoop.hbase.add.row.key"; |
| public static final boolean ADD_ROW_KEY_DEFAULT = false; |
| |
| private Configuration conf; |
| |
| // An object that can transform a map of fieldName->object |
| // into a Put command. |
| private PutTransformer putTransformer; |
| |
| private String tableName; |
| private HTable table; |
| |
| public HBasePutProcessor() { |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public void setConf(Configuration config) { |
| this.conf = config; |
| |
| // Get the implementation of PutTransformer to use. |
| // By default, we call toString() on every non-null field. |
| Class<? extends PutTransformer> xformerClass = |
| (Class<? extends PutTransformer>) |
| this.conf.getClass(TRANSFORMER_CLASS_KEY, ToStringPutTransformer.class); |
| this.putTransformer = (PutTransformer) |
| ReflectionUtils.newInstance(xformerClass, this.conf); |
| if (null == putTransformer) { |
| throw new RuntimeException("Could not instantiate PutTransformer."); |
| } |
| putTransformer.init(conf); |
| |
| this.tableName = conf.get(TABLE_NAME_KEY, null); |
| try { |
| this.table = new HTable(conf, this.tableName); |
| } catch (IOException ioe) { |
| throw new RuntimeException("Could not access HBase table " + tableName, |
| ioe); |
| } |
| this.table.setAutoFlush(false); |
| } |
| |
| @Override |
| public Configuration getConf() { |
| return this.conf; |
| } |
| |
| @Override |
| /** |
| * Processes a record by extracting its field map and converting |
| * it into a list of Put commands into HBase. |
| */ |
| public void accept(FieldMappable record) |
| throws IOException, ProcessingException { |
| Map<String, Object> fields = record.getFieldMap(); |
| |
| List<Put> putList = putTransformer.getPutCommand(fields); |
| if (null != putList) { |
| for (Put put : putList) { |
| if (put!=null) { |
| if (put.isEmpty()) { |
| LOG.warn("Could not insert row with no columns " |
| + "for row-key column: " + Bytes.toString(put.getRow())); |
| } else { |
| this.table.put(put); |
| } |
| } |
| } |
| } |
| } |
| |
| @Override |
| /** |
| * Closes the HBase table and commits all pending operations. |
| */ |
| public void close() throws IOException { |
| this.table.flushCommits(); |
| this.table.close(); |
| } |
| |
| } |