/*
* 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.hcatalog.mapreduce;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.common.FileUtils;
import org.apache.hadoop.hive.metastore.HiveMetaHook;
import org.apache.hadoop.hive.ql.io.RCFile;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.plan.TableDesc;
import org.apache.hadoop.hive.ql.security.authorization.DefaultHiveAuthorizationProvider;
import org.apache.hadoop.hive.ql.security.authorization.HiveAuthorizationProvider;
import org.apache.hadoop.hive.serde2.SerDe;
import org.apache.hadoop.mapred.InputFormat;
import org.apache.hadoop.mapred.OutputFormat;
import org.apache.hcatalog.common.HCatConstants;
import org.apache.hcatalog.common.HCatUtil;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* This class is used to encapsulate the InputFormat, OutputFormat and SerDe
* artifacts of tables which don't define a SerDe. This StorageHandler assumes
* the supplied storage artifacts are for a file-based storage system.
*/
public class FosterStorageHandler extends HCatStorageHandler {
public Configuration conf;
/** The directory under which data is initially written for a partitioned table */
protected static final String DYNTEMP_DIR_NAME = "_DYN";
/** The directory under which data is initially written for a non partitioned table */
protected static final String TEMP_DIR_NAME = "_TEMP";
private Class<? extends InputFormat> ifClass;
private Class<? extends OutputFormat> ofClass;
private Class<? extends SerDe> serDeClass;
public FosterStorageHandler(String ifName, String ofName, String serdeName) throws ClassNotFoundException {
this((Class<? extends InputFormat>) Class.forName(ifName),
(Class<? extends OutputFormat>) Class.forName(ofName),
(Class<? extends SerDe>) Class.forName(serdeName));
}
public FosterStorageHandler(Class<? extends InputFormat> ifClass,
Class<? extends OutputFormat> ofClass,
Class<? extends SerDe> serDeClass) {
this.ifClass = ifClass;
this.ofClass = ofClass;
this.serDeClass = serDeClass;
}
@Override
public Class<? extends InputFormat> getInputFormatClass() {
return ifClass; //To change body of overridden methods use File | Settings | File Templates.
}
@Override
public Class<? extends OutputFormat> getOutputFormatClass() {
return ofClass; //To change body of overridden methods use File | Settings | File Templates.
}
@Override
public Class<? extends SerDe> getSerDeClass() {
return serDeClass; //To change body of implemented methods use File | Settings | File Templates.
}
@Override
public HiveMetaHook getMetaHook() {
return null;
}
@Override
public void configureInputJobProperties(TableDesc tableDesc,
Map<String, String> jobProperties) {
}
@Override
public void configureOutputJobProperties(TableDesc tableDesc,
Map<String, String> jobProperties) {
try {
OutputJobInfo jobInfo = (OutputJobInfo)
HCatUtil.deserialize(tableDesc.getJobProperties().get(
HCatConstants.HCAT_KEY_OUTPUT_INFO));
String parentPath = jobInfo.getTableInfo().getTableLocation();
String dynHash = tableDesc.getJobProperties().get(
HCatConstants.HCAT_DYNAMIC_PTN_JOBID);
// For dynamic partitioned writes without all keyvalues specified,
// we create a temp dir for the associated write job
if (dynHash != null){
parentPath = new Path(parentPath,
DYNTEMP_DIR_NAME+dynHash).toString();
}
String outputLocation;
// For non-partitioned tables, we send them to the temp dir
if(dynHash == null && jobInfo.getPartitionValues().size() == 0) {
outputLocation = TEMP_DIR_NAME;
}
else {
List<String> cols = new ArrayList<String>();
List<String> values = new ArrayList<String>();
//Get the output location in the order partition keys are defined for the table.
for(String name:
jobInfo.getTableInfo().
getPartitionColumns().getFieldNames()) {
String value = jobInfo.getPartitionValues().get(name);
cols.add(name);
values.add(value);
}
outputLocation = FileUtils.makePartName(cols, values);
}
jobInfo.setLocation(new Path(parentPath,outputLocation).toString());
//only set output dir if partition is fully materialized
if(jobInfo.getPartitionValues().size()
== jobInfo.getTableInfo().getPartitionColumns().size()) {
jobProperties.put("mapred.output.dir", jobInfo.getLocation());
}
//TODO find a better home for this, RCFile specifc
jobProperties.put(RCFile.COLUMN_NUMBER_CONF_STR,
Integer.toOctalString(
jobInfo.getOutputSchema().getFields().size()));
jobProperties.put(HCatConstants.HCAT_KEY_OUTPUT_INFO,
HCatUtil.serialize(jobInfo));
} catch (IOException e) {
throw new IllegalStateException("Failed to set output path",e);
}
}
@Override
OutputFormatContainer getOutputFormatContainer(
org.apache.hadoop.mapred.OutputFormat outputFormat) {
return new FileOutputFormatContainer(outputFormat);
}
@Override
public Configuration getConf() {
return conf;
}
@Override
public void setConf(Configuration conf) {
this.conf = conf;
}
@Override
public HiveAuthorizationProvider getAuthorizationProvider()
throws HiveException {
return new DefaultHiveAuthorizationProvider();
}
}