| /** |
| * 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.hive.metastore.MetaStoreUtils; |
| import org.apache.hadoop.hive.metastore.api.FieldSchema; |
| import org.apache.hadoop.hive.metastore.api.StorageDescriptor; |
| import org.apache.hadoop.hive.serde2.Deserializer; |
| import org.apache.hadoop.hive.serde2.SerDe; |
| import org.apache.hadoop.hive.serde2.SerDeException; |
| import org.apache.hadoop.hive.serde2.objectinspector.ListObjectInspector; |
| import org.apache.hadoop.hive.serde2.objectinspector.MapObjectInspector; |
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector; |
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory; |
| import org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector; |
| import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory; |
| import org.apache.hadoop.hive.serde2.typeinfo.ListTypeInfo; |
| import org.apache.hadoop.hive.serde2.typeinfo.MapTypeInfo; |
| import org.apache.hadoop.hive.serde2.typeinfo.PrimitiveTypeInfo; |
| import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo; |
| import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo; |
| import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoUtils; |
| import org.apache.hadoop.mapred.Reporter; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| import org.apache.hcatalog.common.HCatUtil; |
| import org.apache.hcatalog.data.schema.HCatFieldSchema; |
| import org.apache.hcatalog.data.schema.HCatSchema; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Properties; |
| |
| class InternalUtil { |
| private static final Logger LOG = LoggerFactory.getLogger(InternalUtil.class); |
| |
| static StorerInfo extractStorerInfo(StorageDescriptor sd, Map<String, String> properties) throws IOException { |
| Properties hcatProperties = new Properties(); |
| for (String key : properties.keySet()) { |
| hcatProperties.put(key, properties.get(key)); |
| } |
| |
| // also populate with StorageDescriptor->SerDe.Parameters |
| for (Map.Entry<String, String> param : |
| sd.getSerdeInfo().getParameters().entrySet()) { |
| hcatProperties.put(param.getKey(), param.getValue()); |
| } |
| |
| |
| return new StorerInfo( |
| sd.getInputFormat(), sd.getOutputFormat(), sd.getSerdeInfo().getSerializationLib(), |
| properties.get(org.apache.hadoop.hive.metastore.api.Constants.META_TABLE_STORAGE), |
| hcatProperties); |
| } |
| |
| static StructObjectInspector createStructObjectInspector(HCatSchema outputSchema) throws IOException { |
| |
| if (outputSchema == null) { |
| throw new IOException("Invalid output schema specified"); |
| } |
| |
| List<ObjectInspector> fieldInspectors = new ArrayList<ObjectInspector>(); |
| List<String> fieldNames = new ArrayList<String>(); |
| |
| for (HCatFieldSchema hcatFieldSchema : outputSchema.getFields()) { |
| TypeInfo type = TypeInfoUtils.getTypeInfoFromTypeString(hcatFieldSchema.getTypeString()); |
| |
| fieldNames.add(hcatFieldSchema.getName()); |
| fieldInspectors.add(getObjectInspector(type)); |
| } |
| |
| StructObjectInspector structInspector = ObjectInspectorFactory. |
| getStandardStructObjectInspector(fieldNames, fieldInspectors); |
| return structInspector; |
| } |
| |
| private static ObjectInspector getObjectInspector(TypeInfo type) throws IOException { |
| |
| switch (type.getCategory()) { |
| |
| case PRIMITIVE: |
| PrimitiveTypeInfo primitiveType = (PrimitiveTypeInfo) type; |
| return PrimitiveObjectInspectorFactory. |
| getPrimitiveJavaObjectInspector(primitiveType.getPrimitiveCategory()); |
| |
| case MAP: |
| MapTypeInfo mapType = (MapTypeInfo) type; |
| MapObjectInspector mapInspector = ObjectInspectorFactory.getStandardMapObjectInspector( |
| getObjectInspector(mapType.getMapKeyTypeInfo()), getObjectInspector(mapType.getMapValueTypeInfo())); |
| return mapInspector; |
| |
| case LIST: |
| ListTypeInfo listType = (ListTypeInfo) type; |
| ListObjectInspector listInspector = ObjectInspectorFactory.getStandardListObjectInspector( |
| getObjectInspector(listType.getListElementTypeInfo())); |
| return listInspector; |
| |
| case STRUCT: |
| StructTypeInfo structType = (StructTypeInfo) type; |
| List<TypeInfo> fieldTypes = structType.getAllStructFieldTypeInfos(); |
| |
| List<ObjectInspector> fieldInspectors = new ArrayList<ObjectInspector>(); |
| for (TypeInfo fieldType : fieldTypes) { |
| fieldInspectors.add(getObjectInspector(fieldType)); |
| } |
| |
| StructObjectInspector structInspector = ObjectInspectorFactory.getStandardStructObjectInspector( |
| structType.getAllStructFieldNames(), fieldInspectors); |
| return structInspector; |
| |
| default: |
| throw new IOException("Unknown field schema type"); |
| } |
| } |
| |
| //TODO this has to find a better home, it's also hardcoded as default in hive would be nice |
| // if the default was decided by the serde |
| static void initializeOutputSerDe(SerDe serDe, Configuration conf, OutputJobInfo jobInfo) |
| throws SerDeException { |
| serDe.initialize(conf, getSerdeProperties(jobInfo.getTableInfo(), jobInfo.getOutputSchema())); |
| } |
| |
| static void initializeDeserializer(Deserializer deserializer, Configuration conf, |
| HCatTableInfo info, HCatSchema schema) throws SerDeException { |
| Properties props = getSerdeProperties(info, schema); |
| LOG.info("Initializing " + deserializer.getClass().getName() + " with properties " + props); |
| deserializer.initialize(conf, props); |
| } |
| |
| private static Properties getSerdeProperties(HCatTableInfo info, HCatSchema s) |
| throws SerDeException { |
| Properties props = new Properties(); |
| List<FieldSchema> fields = HCatUtil.getFieldSchemaList(s.getFields()); |
| props.setProperty(org.apache.hadoop.hive.serde.Constants.LIST_COLUMNS, |
| MetaStoreUtils.getColumnNamesFromFieldSchema(fields)); |
| props.setProperty(org.apache.hadoop.hive.serde.Constants.LIST_COLUMN_TYPES, |
| MetaStoreUtils.getColumnTypesFromFieldSchema(fields)); |
| |
| // setting these props to match LazySimpleSerde |
| props.setProperty(org.apache.hadoop.hive.serde.Constants.SERIALIZATION_NULL_FORMAT, "\\N"); |
| props.setProperty(org.apache.hadoop.hive.serde.Constants.SERIALIZATION_FORMAT, "1"); |
| |
| //add props from params set in table schema |
| props.putAll(info.getStorerInfo().getProperties()); |
| |
| return props; |
| } |
| |
| static Reporter createReporter(TaskAttemptContext context) { |
| return new ProgressReporter(context); |
| } |
| |
| /** |
| * Casts an InputSplit into a HCatSplit, providing a useful error message if the cast fails. |
| * @param split the InputSplit |
| * @return the HCatSplit |
| * @throws IOException |
| */ |
| public static HCatSplit castToHCatSplit(InputSplit split) throws IOException { |
| if (split instanceof HCatSplit) { |
| return (HCatSplit) split; |
| } else { |
| throw new IOException("Split must be " + HCatSplit.class.getName() |
| + " but found " + split.getClass().getName()); |
| } |
| } |
| } |
