Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* 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.hadoop.hive.accumulo.serde;
import java.util.Collections;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Properties;
import org.apache.accumulo.core.security.Authorizations;
import org.apache.accumulo.core.security.ColumnVisibility;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.accumulo.AccumuloConnectionParameters;
import org.apache.hadoop.hive.accumulo.columns.ColumnMapper;
import org.apache.hadoop.hive.accumulo.columns.ColumnMapping;
import org.apache.hadoop.hive.accumulo.columns.HiveAccumuloRowIdColumnMapping;
import org.apache.hadoop.hive.common.JavaUtils;
import org.apache.hadoop.hive.serde.serdeConstants;
import org.apache.hadoop.hive.serde2.SerDeException;
import org.apache.hadoop.hive.serde2.lazy.LazySerDeParameters;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
import org.apache.hadoop.util.ReflectionUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Preconditions;
/**
*
*/
public class AccumuloSerDeParameters extends AccumuloConnectionParameters {
private static final Logger log = LoggerFactory.getLogger(AccumuloSerDeParameters.class);
public static final String COLUMN_MAPPINGS = "accumulo.columns.mapping";
public static final String ITERATOR_PUSHDOWN_KEY = "accumulo.iterator.pushdown";
public static final boolean ITERATOR_PUSHDOWN_DEFAULT = true;
public static final String DEFAULT_STORAGE_TYPE = "accumulo.default.storage";
public static final String VISIBILITY_LABEL_KEY = "accumulo.visibility.label";
public static final ColumnVisibility DEFAULT_VISIBILITY_LABEL = new ColumnVisibility();
public static final String AUTHORIZATIONS_KEY = "accumulo.authorizations";
public static final String COMPOSITE_ROWID_FACTORY = "accumulo.composite.rowid.factory";
public static final String COMPOSITE_ROWID_CLASS = "accumulo.composite.rowid";
protected final ColumnMapper columnMapper;
private Properties tableProperties;
private String serdeName;
private LazySerDeParameters lazySerDeParameters;
private AccumuloRowIdFactory rowIdFactory;
public AccumuloSerDeParameters(Configuration conf, Properties tableProperties, String serdeName)
throws SerDeException {
super(conf);
this.tableProperties = tableProperties;
this.serdeName = serdeName;
lazySerDeParameters = new LazySerDeParameters(conf, tableProperties, serdeName);
// The default encoding for this table when not otherwise specified
String defaultStorage = tableProperties.getProperty(DEFAULT_STORAGE_TYPE);
columnMapper = new ColumnMapper(getColumnMappingValue(), defaultStorage,
lazySerDeParameters.getColumnNames(), lazySerDeParameters.getColumnTypes());
log.info("Constructed column mapping " + columnMapper);
// Generate types for column mapping
if (null == getColumnTypeValue()) {
tableProperties.setProperty(serdeConstants.LIST_COLUMN_TYPES, columnMapper.getTypesString());
}
if (columnMapper.size() < lazySerDeParameters.getColumnNames().size()) {
throw new TooManyHiveColumnsException("You have more " + COLUMN_MAPPINGS
+ " fields than hive columns");
} else if (columnMapper.size() > lazySerDeParameters.getColumnNames().size()) {
throw new TooManyAccumuloColumnsException(
"You have more hive columns than fields mapped with " + COLUMN_MAPPINGS);
}
this.rowIdFactory = initRowIdFactory(conf, tableProperties);
}
protected AccumuloRowIdFactory initRowIdFactory(Configuration conf, Properties tbl)
throws SerDeException {
try {
AccumuloRowIdFactory keyFactory = createRowIdFactory(conf, tbl);
if (keyFactory != null) {
keyFactory.init(this, tbl);
}
return keyFactory;
} catch (Exception e) {
throw new SerDeException(e);
}
}
@SuppressWarnings({"rawtypes", "unchecked"})
protected AccumuloRowIdFactory createRowIdFactory(Configuration job, Properties tbl)
throws Exception {
// Try to load the composite factory if one was provided
String factoryClassName = tbl.getProperty(COMPOSITE_ROWID_FACTORY);
if (factoryClassName != null) {
log.info("Loading CompositeRowIdFactory class " + factoryClassName);
Class factoryClazz = JavaUtils.loadClass(factoryClassName);
return (AccumuloRowIdFactory) ReflectionUtils.newInstance(factoryClazz, job);
}
// See if a custom CompositeKey class was provided
String keyClassName = tbl.getProperty(COMPOSITE_ROWID_CLASS);
if (keyClassName != null) {
log.info("Loading CompositeRowId class " + keyClassName);
Class keyClass = JavaUtils.loadClass(keyClassName);
Class compositeRowIdClass = keyClass
.asSubclass(AccumuloCompositeRowId.class);
return new CompositeAccumuloRowIdFactory(compositeRowIdClass);
}
return new DefaultAccumuloRowIdFactory();
}
public LazySerDeParameters getSerDeParameters() {
return lazySerDeParameters;
}
public Properties getTableProperties() {
return tableProperties;
}
public String getColumnTypeValue() {
return tableProperties.getProperty(serdeConstants.LIST_COLUMN_TYPES);
}
public String getSerDeName() {
return serdeName;
}
public String getColumnMappingValue() {
return tableProperties.getProperty(COLUMN_MAPPINGS);
}
public HiveAccumuloRowIdColumnMapping getRowIdColumnMapping() {
return columnMapper.getRowIdMapping();
}
public boolean getIteratorPushdown() {
return conf.getBoolean(ITERATOR_PUSHDOWN_KEY, ITERATOR_PUSHDOWN_DEFAULT);
}
public List getHiveColumnNames() {
return Collections.unmodifiableList(lazySerDeParameters.getColumnNames());
}
public List getHiveColumnTypes() {
return Collections.unmodifiableList(lazySerDeParameters.getColumnTypes());
}
public ColumnMapper getColumnMapper() {
return columnMapper;
}
public int getRowIdOffset() {
return columnMapper.getRowIdOffset();
}
public List getColumnMappings() {
return columnMapper.getColumnMappings();
}
public AccumuloRowIdFactory getRowIdFactory() {
return rowIdFactory;
}
public String getRowIdHiveColumnName() {
int rowIdOffset = columnMapper.getRowIdOffset();
if (-1 == rowIdOffset) {
return null;
}
List hiveColumnNames = lazySerDeParameters.getColumnNames();
if (0 > rowIdOffset || hiveColumnNames.size() <= rowIdOffset) {
throw new IllegalStateException("Tried to find rowID offset at position " + rowIdOffset
+ " from Hive columns " + hiveColumnNames);
}
return hiveColumnNames.get(rowIdOffset);
}
public ColumnMapping getColumnMappingForHiveColumn(String hiveColumn) {
List hiveColumnNames = lazySerDeParameters.getColumnNames();
for (int offset = 0; offset < hiveColumnNames.size() && offset < columnMapper.size(); offset++) {
String hiveColumnName = hiveColumnNames.get(offset);
if (hiveColumn.equals(hiveColumnName)) {
return columnMapper.get(offset);
}
}
throw new NoSuchElementException("Could not find column mapping for Hive column " + hiveColumn);
}
public TypeInfo getTypeForHiveColumn(String hiveColumn) {
List hiveColumnNames = lazySerDeParameters.getColumnNames();
List hiveColumnTypes = lazySerDeParameters.getColumnTypes();
for (int i = 0; i < hiveColumnNames.size() && i < hiveColumnTypes.size(); i++) {
String columnName = hiveColumnNames.get(i);
if (hiveColumn.equals(columnName)) {
return hiveColumnTypes.get(i);
}
}
throw new NoSuchElementException("Could not find Hive column type for " + hiveColumn);
}
/**
* Extracts the table property to allow a custom ColumnVisibility label to be set on updates to be
* written to an Accumulo table. The value in the table property must be a properly formatted
* {@link ColumnVisibility}. If not value is present in the table properties, an empty
* ColumnVisibility is returned.
*
* @return The ColumnVisibility to be applied to all updates sent to Accumulo
*/
public ColumnVisibility getTableVisibilityLabel() {
String visibilityLabel = tableProperties.getProperty(VISIBILITY_LABEL_KEY, null);
if (null == visibilityLabel || visibilityLabel.isEmpty()) {
return DEFAULT_VISIBILITY_LABEL;
}
return new ColumnVisibility(visibilityLabel);
}
/**
* Extracts the table property to allow dynamic Accumulo Authorizations to be used when reading
* data from an Accumulo table. If no Authorizations are provided in the table properties, null is
* returned to preserve the functionality to read all data that the current user has access to.
*
* @return The Authorizations that should be used to read data from Accumulo, null if no
* configuration is supplied.
*/
public Authorizations getAuthorizations() {
String authorizationStr = tableProperties.getProperty(AUTHORIZATIONS_KEY, null);
return getAuthorizationsFromValue(authorizationStr);
}
/**
* Create an Authorizations object when the provided value is not null. Will return null,
* otherwise.
*
* @param authorizationStr
* Configuration value to parse
* @return Authorization object or null
*/
protected static Authorizations getAuthorizationsFromValue(String authorizationStr) {
if (null == authorizationStr) {
return null;
}
return new Authorizations(authorizationStr);
}
/**
* Extract any configuration on Authorizations to be used from the provided Configuration. If a
* non-null value is not present in the configuration, a null object is returned
*
* @return Authorization built from configuration value, null if no value is present in conf
*/
public static Authorizations getAuthorizationsFromConf(Configuration conf) {
Preconditions.checkNotNull(conf);
String authorizationStr = conf.get(AUTHORIZATIONS_KEY, null);
return getAuthorizationsFromValue(authorizationStr);
}
}
