| /** |
| * 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.atlas.repository.graph; |
| |
| import com.thinkaurelius.titan.core.Cardinality; |
| import com.thinkaurelius.titan.core.PropertyKey; |
| import com.thinkaurelius.titan.core.TitanGraph; |
| import com.thinkaurelius.titan.core.schema.Mapping; |
| import com.thinkaurelius.titan.core.schema.TitanGraphIndex; |
| import com.thinkaurelius.titan.core.schema.TitanManagement; |
| import com.tinkerpop.blueprints.Edge; |
| import com.tinkerpop.blueprints.Vertex; |
| import org.apache.atlas.ApplicationProperties; |
| import org.apache.atlas.AtlasException; |
| import org.apache.atlas.discovery.SearchIndexer; |
| import org.apache.atlas.ha.HAConfiguration; |
| import org.apache.atlas.listener.ActiveStateChangeHandler; |
| import org.apache.atlas.repository.Constants; |
| import org.apache.atlas.repository.IndexCreationException; |
| import org.apache.atlas.repository.IndexException; |
| import org.apache.atlas.repository.RepositoryException; |
| import org.apache.atlas.typesystem.types.AttributeInfo; |
| import org.apache.atlas.typesystem.types.ClassType; |
| import org.apache.atlas.typesystem.types.DataTypes; |
| import org.apache.atlas.typesystem.types.IDataType; |
| import org.apache.atlas.typesystem.types.Multiplicity; |
| import org.apache.atlas.typesystem.types.StructType; |
| import org.apache.atlas.typesystem.types.TraitType; |
| import org.apache.commons.configuration.Configuration; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.inject.Inject; |
| import java.math.BigDecimal; |
| import java.math.BigInteger; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * Adds index for properties of a given type when its added before any instances are added. |
| */ |
| public class GraphBackedSearchIndexer implements SearchIndexer, ActiveStateChangeHandler { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(GraphBackedSearchIndexer.class); |
| |
| private final TitanGraph titanGraph; |
| |
| List<Class> MIXED_INDEX_EXCLUSIONS = new ArrayList() {{ |
| add(Boolean.class); |
| add(BigDecimal.class); |
| add(BigInteger.class); |
| }}; |
| |
| @Inject |
| public GraphBackedSearchIndexer(GraphProvider<TitanGraph> graphProvider) throws AtlasException { |
| this(graphProvider, ApplicationProperties.get()); |
| } |
| |
| GraphBackedSearchIndexer(GraphProvider<TitanGraph> graphProvider, Configuration configuration) |
| throws IndexException, RepositoryException { |
| this.titanGraph = graphProvider.get(); |
| if (!HAConfiguration.isHAEnabled(configuration)) { |
| initialize(); |
| } |
| } |
| |
| /** |
| * Initializes the indices for the graph - create indices for Global Vertex Keys |
| */ |
| private void initialize() throws RepositoryException, IndexException { |
| TitanManagement management = titanGraph.getManagementSystem(); |
| try { |
| if (management.containsPropertyKey(Constants.VERTEX_TYPE_PROPERTY_KEY)) { |
| LOG.info("Global indexes already exist for graph"); |
| return; |
| } |
| |
| /* This is called only once, which is the first time Atlas types are made indexable .*/ |
| LOG.info("Indexes do not exist, Creating indexes for titanGraph."); |
| management.buildIndex(Constants.VERTEX_INDEX, Vertex.class).buildMixedIndex(Constants.BACKING_INDEX); |
| management.buildIndex(Constants.EDGE_INDEX, Edge.class).buildMixedIndex(Constants.BACKING_INDEX); |
| |
| // create a composite index for guid as its unique |
| createIndexes(management, Constants.GUID_PROPERTY_KEY, String.class, true, |
| Cardinality.SINGLE, true); |
| |
| // create a composite index for entity state |
| createIndexes(management, Constants.TIMESTAMP_PROPERTY_KEY, Long.class, false, Cardinality.SINGLE, true); |
| |
| // create a composite index for entity state |
| createIndexes(management, Constants.MODIFICATION_TIMESTAMP_PROPERTY_KEY, Long.class, false, |
| Cardinality.SINGLE, true); |
| |
| // create a composite and mixed index for type since it can be combined with other keys |
| createIndexes(management, Constants.ENTITY_TYPE_PROPERTY_KEY, String.class, false, Cardinality.SINGLE, |
| true); |
| |
| // create a composite and mixed index for type since it can be combined with other keys |
| createIndexes(management, Constants.SUPER_TYPES_PROPERTY_KEY, String.class, false, Cardinality.SET, |
| true); |
| |
| // create a composite and mixed index for traitNames since it can be combined with other |
| // keys. Traits must be a set and not a list. |
| createIndexes(management, Constants.TRAIT_NAMES_PROPERTY_KEY, String.class, false, Cardinality.SET, |
| true); |
| |
| // Index for full text search |
| createFullTextIndex(management); |
| |
| //Indexes for graph backed type system store |
| createTypeStoreIndexes(management); |
| |
| commit(management); |
| LOG.info("Index creation for global keys complete."); |
| } catch (Throwable t) { |
| rollback(management); |
| throw new RepositoryException(t); |
| } |
| } |
| |
| private void createFullTextIndex(TitanManagement management) { |
| PropertyKey fullText = |
| management.makePropertyKey(Constants.ENTITY_TEXT_PROPERTY_KEY).dataType(String.class).make(); |
| |
| management.buildIndex(Constants.FULLTEXT_INDEX, Vertex.class) |
| .addKey(fullText, com.thinkaurelius.titan.core.schema.Parameter.of("mapping", Mapping.TEXT)) |
| .buildMixedIndex(Constants.BACKING_INDEX); |
| LOG.info("Created mixed index for {}", Constants.ENTITY_TEXT_PROPERTY_KEY); |
| } |
| |
| private void createTypeStoreIndexes(TitanManagement management) { |
| //Create unique index on typeName |
| createIndexes(management, Constants.TYPENAME_PROPERTY_KEY, String.class, true, Cardinality.SINGLE, |
| true); |
| |
| //create index on vertex type |
| createIndexes(management, Constants.VERTEX_TYPE_PROPERTY_KEY, String.class, false, Cardinality.SINGLE, |
| true); |
| } |
| |
| /** |
| * This is upon adding a new type to Store. |
| * |
| * @param dataTypes data type |
| * @throws org.apache.atlas.AtlasException |
| */ |
| @Override |
| public void onAdd(Collection<? extends IDataType> dataTypes) throws AtlasException { |
| TitanManagement management = titanGraph.getManagementSystem(); |
| for (IDataType dataType : dataTypes) { |
| LOG.info("Creating indexes for type name={}, definition={}", dataType.getName(), dataType.getClass()); |
| try { |
| addIndexForType(management, dataType); |
| LOG.debug("Index creation for type {} complete", dataType.getName()); |
| } catch (Throwable throwable) { |
| LOG.error("Error creating index for type {}", dataType, throwable); |
| //Rollback indexes if any failure |
| rollback(management); |
| throw new IndexCreationException("Error while creating index for type " + dataType, throwable); |
| } |
| } |
| |
| //Commit indexes |
| commit(management); |
| } |
| |
| @Override |
| public void onChange(Collection<? extends IDataType> dataTypes) throws AtlasException { |
| onAdd(dataTypes); |
| } |
| |
| private void addIndexForType(TitanManagement management, IDataType dataType) { |
| switch (dataType.getTypeCategory()) { |
| case PRIMITIVE: |
| case ENUM: |
| case ARRAY: |
| case MAP: |
| // do nothing since these are only attributes |
| // and not types like structs, traits or classes |
| break; |
| |
| case STRUCT: |
| StructType structType = (StructType) dataType; |
| createIndexForFields(management, structType, structType.fieldMapping().fields); |
| break; |
| |
| case TRAIT: |
| TraitType traitType = (TraitType) dataType; |
| createIndexForFields(management, traitType, traitType.fieldMapping().fields); |
| break; |
| |
| case CLASS: |
| ClassType classType = (ClassType) dataType; |
| createIndexForFields(management, classType, classType.fieldMapping().fields); |
| break; |
| |
| default: |
| throw new IllegalArgumentException("bad data type" + dataType); |
| } |
| } |
| |
| private void createIndexForFields(TitanManagement management, IDataType dataType, Map<String, AttributeInfo> fields) { |
| for (AttributeInfo field : fields.values()) { |
| if (field.isIndexable) { |
| createIndexForAttribute(management, dataType.getName(), field); |
| } |
| } |
| } |
| |
| private void createIndexForAttribute(TitanManagement management, String typeName, AttributeInfo field) { |
| final String propertyName = typeName + "." + field.name; |
| switch (field.dataType().getTypeCategory()) { |
| case PRIMITIVE: |
| Cardinality cardinality = getCardinality(field.multiplicity); |
| createIndexes(management, propertyName, getPrimitiveClass(field.dataType()), field.isUnique, |
| cardinality, false); |
| break; |
| |
| case ENUM: |
| cardinality = getCardinality(field.multiplicity); |
| createIndexes(management, propertyName, String.class, field.isUnique, cardinality, false); |
| break; |
| |
| case ARRAY: |
| case MAP: |
| // todo - how do we overcome this limitation? |
| // IGNORE: Can only index single-valued property keys on vertices in Mixed Index |
| break; |
| |
| case STRUCT: |
| StructType structType = (StructType) field.dataType(); |
| createIndexForFields(management, structType, structType.fieldMapping().fields); |
| break; |
| |
| case TRAIT: |
| // do nothing since this is NOT contained in other types |
| break; |
| |
| case CLASS: |
| // this is only A reference, index the attribute for edge |
| // Commenting this out since we do not need an index for edge here |
| //createEdgeMixedIndex(propertyName); |
| break; |
| |
| default: |
| throw new IllegalArgumentException("bad data type" + field.dataType().getName()); |
| } |
| } |
| |
| private Class getPrimitiveClass(IDataType dataType) { |
| if (dataType == DataTypes.STRING_TYPE) { |
| return String.class; |
| } else if (dataType == DataTypes.SHORT_TYPE) { |
| return Short.class; |
| } else if (dataType == DataTypes.INT_TYPE) { |
| return Integer.class; |
| } else if (dataType == DataTypes.BIGINTEGER_TYPE) { |
| return BigInteger.class; |
| } else if (dataType == DataTypes.BOOLEAN_TYPE) { |
| return Boolean.class; |
| } else if (dataType == DataTypes.BYTE_TYPE) { |
| return Byte.class; |
| } else if (dataType == DataTypes.LONG_TYPE) { |
| return Long.class; |
| } else if (dataType == DataTypes.FLOAT_TYPE) { |
| return Float.class; |
| } else if (dataType == DataTypes.DOUBLE_TYPE) { |
| return Double.class; |
| } else if (dataType == DataTypes.BIGDECIMAL_TYPE) { |
| return BigDecimal.class; |
| } else if (dataType == DataTypes.DATE_TYPE) { |
| //Indexing with date converted to long as of now since Titan is yet to add support for Date type with mixed indexes |
| return Long.class; |
| } |
| |
| |
| throw new IllegalArgumentException("unknown data type " + dataType); |
| } |
| |
| |
| private Cardinality getCardinality(Multiplicity multiplicity) { |
| if (multiplicity == Multiplicity.OPTIONAL || multiplicity == Multiplicity.REQUIRED) { |
| return Cardinality.SINGLE; |
| } else if (multiplicity == Multiplicity.COLLECTION) { |
| return Cardinality.LIST; |
| } else if (multiplicity == Multiplicity.SET) { |
| return Cardinality.SET; |
| } |
| |
| // todo - default to LIST as this is the most forgiving |
| return Cardinality.LIST; |
| } |
| |
| private PropertyKey createIndexes(TitanManagement management, String propertyName, |
| Class propertyClass, boolean isUnique, Cardinality cardinality, |
| boolean isSystemProperty) { |
| PropertyKey propertyKey = management.getPropertyKey(propertyName); |
| if (propertyKey == null) { |
| propertyKey = management.makePropertyKey(propertyName).dataType(propertyClass).cardinality(cardinality) |
| .make(); |
| |
| enhanceMixedIndex(management, propertyName, propertyClass, cardinality, propertyKey); |
| |
| if (isSystemProperty) { |
| createCompositeIndex(management, propertyName, propertyClass, propertyKey, isUnique); |
| } else if (isUnique) { |
| // send uniqueness as false because there can be many vertexes with the same property value |
| // but state can be active / deleted. |
| createCompositeIndex(management, propertyName, propertyClass, propertyKey, false); |
| } |
| } |
| return propertyKey; |
| } |
| |
| private void createCompositeIndex(TitanManagement management, String propertyName, Class propertyClass, |
| PropertyKey propertyKey, boolean enforceUniqueness) { |
| LOG.debug("Creating composite index for property {} of type {} ", propertyName, |
| propertyClass.getName()); |
| TitanManagement.IndexBuilder indexBuilder = |
| management.buildIndex(propertyName, Vertex.class).addKey(propertyKey); |
| if (enforceUniqueness) { |
| indexBuilder.unique(); |
| } |
| indexBuilder.buildCompositeIndex(); |
| LOG.debug("Created composite index for property {} of type {} ", propertyName, propertyClass.getName()); |
| } |
| |
| private void enhanceMixedIndex(TitanManagement management, String propertyName, Class propertyClass, |
| Cardinality cardinality, PropertyKey propertyKey) { |
| if (checkIfMixedIndexApplicable(propertyClass, cardinality)) { |
| //Use backing index |
| LOG.debug("Creating backing index for property {} of type {} ", propertyName, propertyClass.getName()); |
| TitanGraphIndex vertexIndex = management.getGraphIndex(Constants.VERTEX_INDEX); |
| management.addIndexKey(vertexIndex, propertyKey); |
| LOG.debug("Created backing index for property {} of type {} ", propertyName, propertyClass.getName()); |
| } |
| } |
| |
| private boolean checkIfMixedIndexApplicable(Class propertyClass, Cardinality cardinality) { |
| return !(MIXED_INDEX_EXCLUSIONS.contains(propertyClass) || cardinality == Cardinality.LIST || cardinality == |
| Cardinality.SET); |
| } |
| |
| public void commit(TitanManagement management) throws IndexException { |
| try { |
| management.commit(); |
| } catch (Exception e) { |
| LOG.error("Index commit failed", e); |
| throw new IndexException("Index commit failed ", e); |
| } |
| } |
| |
| public void rollback(TitanManagement management) throws IndexException { |
| try { |
| management.rollback(); |
| } catch (Exception e) { |
| LOG.error("Index rollback failed ", e); |
| throw new IndexException("Index rollback failed ", e); |
| } |
| } |
| |
| /** |
| * Initialize global indices for Titan graph on server activation. |
| * |
| * Since the indices are shared state, we need to do this only from an active instance. |
| */ |
| @Override |
| public void instanceIsActive() throws AtlasException { |
| LOG.info("Reacting to active: initializing index"); |
| try { |
| initialize(); |
| } catch (RepositoryException e) { |
| throw new AtlasException("Error in reacting to active on initialization", e); |
| } catch (IndexException e) { |
| throw new AtlasException("Error in reacting to active on initialization", e); |
| } |
| } |
| |
| @Override |
| public void instanceIsPassive() { |
| LOG.info("Reacting to passive state: No action right now."); |
| } |
| |
| /* Commenting this out since we do not need an index for edge label here |
| private void createEdgeMixedIndex(String propertyName) { |
| EdgeLabel edgeLabel = management.getEdgeLabel(propertyName); |
| if (edgeLabel == null) { |
| edgeLabel = management.makeEdgeLabel(propertyName).make(); |
| management.buildEdgeIndex(edgeLabel, propertyName, Direction.BOTH, Order.DEFAULT); |
| LOG.info("Created index for edge label {}", propertyName); |
| } |
| }*/ |
| } |