Java tutorial
/** * 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.cloudata.core.tablet.backup; import java.io.ByteArrayInputStream; import java.io.DataInputStream; import java.io.IOException; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.hadoop.io.BytesWritable; import org.apache.hadoop.io.Text; import org.apache.hadoop.mapred.JobConf; import org.apache.hadoop.mapred.Mapper; import org.apache.hadoop.mapred.OutputCollector; import org.apache.hadoop.mapred.Reporter; import org.cloudata.core.client.CTable; import org.cloudata.core.client.Row; import org.cloudata.core.common.conf.CloudataConf; import org.cloudata.core.parallel.hadoop.DefaultTabletInputFormat; /** * @author jindolk * */ public class RestoreBinaryPartitionMap implements Mapper<BytesWritable, BytesWritable, Text, Text> { static final Log LOG = LogFactory.getLog(RestoreBinaryPartitionMap.class.getName()); CsvParser parser = new CsvParser(); Row lastRow; JobConf job; @Override public void map(BytesWritable key, BytesWritable value, OutputCollector<Text, Text> output, Reporter reporter) throws IOException { ByteArrayInputStream bin = new ByteArrayInputStream(key.get(), 0, key.getSize()); DataInputStream in = new DataInputStream(bin); Row row = new Row(); row.readFields(in); lastRow = row; in.close(); } @Override public void configure(JobConf job) { this.job = job; } @Override public void close() throws IOException { if (lastRow != null) { CTable ctable = CTable.openTable(new CloudataConf(job), job.get(DefaultTabletInputFormat.OUTPUT_TABLE)); if (ctable == null) { LOG.error("No table:" + job.get(DefaultTabletInputFormat.OUTPUT_TABLE)); return; } //FIXME //ctable.addTablet(lastRow.getKey()); LOG.info("Add tablet:" + lastRow.getKey()); } } }