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/*-
* ============LICENSE_START=======================================================
* org.openecomp.aai
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.aai.serialization.engines;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import org.apache.tinkerpop.gremlin.process.traversal.strategy.verification.ReadOnlyStrategy;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.openecomp.aai.dbmap.DBConnectionType;
import org.openecomp.aai.introspection.Loader;
import org.openecomp.aai.query.builder.GremlinTraversal;
import org.openecomp.aai.query.builder.GremlinUnique;
import org.openecomp.aai.query.builder.QueryBuilder;
import org.openecomp.aai.query.builder.TraversalQuery;
import org.openecomp.aai.serialization.db.GraphSingleton;
import org.openecomp.aai.serialization.engines.query.GraphTraversalQueryEngine;
import org.openecomp.aai.serialization.engines.query.QueryEngine;
import com.thinkaurelius.titan.core.TitanGraph;
import com.thinkaurelius.titan.core.schema.TitanManagement;
public abstract class TransactionalGraphEngine {
protected GraphSingleton singleton = null;
protected QueryEngine queryEngine = null;
protected QueryBuilder<Vertex> queryBuilder = null;
protected QueryStyle style = null;
protected final DBConnectionType connectionType;
protected final Loader loader;
protected Graph currentTx = null;
protected GraphTraversalSource currentTraversal = null;
protected GraphTraversalSource readOnlyTraversal = null;
private final Admin admin;
/**
* Instantiates a new transactional graph engine.
*
* @param style the style
* @param loader the loader
*/
public TransactionalGraphEngine (QueryStyle style, Loader loader, DBConnectionType connectionType, GraphSingleton singleton) {
this.loader = loader;
this.style = style;
this.singleton = singleton;
this.connectionType = connectionType;
admin = new Admin();
}
public TransactionalGraphEngine (QueryStyle style, Loader loader) {
this.loader = loader;
this.style = style;
this.connectionType = DBConnectionType.REALTIME;
admin = new Admin();
}
/**
* Sets the list property.
*
* @param v the v
* @param name the name
* @param obj the obj
* @return true, if successful
*/
public abstract boolean setListProperty(Vertex v, String name, List<?> obj);
/**
* Gets the list property.
*
* @param v the v
* @param name the name
* @return the list property
*/
public abstract List<Object> getListProperty(Vertex v, String name);
/**
* Gets the graph.
*
* @return the graph
*/
private TitanGraph getGraph() {
return singleton.getTxGraph(this.connectionType);
}
/**
* Gets the count.
*
* @return the count
*/
public AtomicInteger getCount() {
return singleton.getCount();
}
/**
* Gets the query engine.
*
* @return the query engine
*/
public QueryEngine getQueryEngine() {
QueryEngine engine = null;
if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
//this.queryEngine = new GremlinQueryEngine(this);
} else if (style.equals(QueryStyle.GREMLIN_UNIQUE)) {
//this.queryEngine = new GremlinQueryEngine(this);
} else if (style.equals(QueryStyle.GREMLINPIPELINE_TRAVERSAL)) {
//this.queryEngine = new GremlinPipelineQueryEngine(this);
} else if (style.equals(QueryStyle.TRAVERSAL)) {
return new GraphTraversalQueryEngine(this.asAdmin().getTraversalSource());
} else {
throw new IllegalArgumentException("Query Engine type not recognized");
}
return engine;
}
/**
* Gets the query builder.
*
* @return the query builder
*/
public QueryBuilder<Vertex> getQueryBuilder() {
return getQueryBuilder(this.loader);
}
public QueryBuilder<Vertex> getQueryBuilder(QueryStyle style) {
return getQueryBuilder(style, this.loader);
}
public QueryBuilder<Vertex> getQueryBuilder(Loader loader) {
return getQueryBuilder(this.style, loader);
}
public QueryBuilder<Vertex> getQueryBuilder(QueryStyle style, Loader loader) {
if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
return new GremlinTraversal<>(loader, this.asAdmin().getTraversalSource());
} else if (style.equals(QueryStyle.GREMLIN_UNIQUE)) {
return new GremlinUnique<>(loader, this.asAdmin().getTraversalSource());
} else if (style.equals(QueryStyle.GREMLINPIPELINE_TRAVERSAL)) {
//return new GremlinPipelineTraversal(loader);
} else if (style.equals(QueryStyle.TRAVERSAL)) {
return new TraversalQuery<>(loader, this.asAdmin().getTraversalSource());
} else {
throw new IllegalArgumentException("Query Builder type not recognized");
}
return queryBuilder;
}
/**
* Gets the query builder.
*
* @param start the start
* @return the query builder
*/
public QueryBuilder<Vertex> getQueryBuilder(Vertex start) {
return getQueryBuilder(this.loader, start);
}
public QueryBuilder<Vertex> getQueryBuilder(Loader loader, Vertex start) {
return getQueryBuilder(this.style, loader, start);
}
public QueryBuilder<Vertex> getQueryBuilder(QueryStyle style, Loader loader, Vertex start) {
if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
return new GremlinTraversal<>(loader, this.asAdmin().getTraversalSource(), start);
} else if (style.equals(QueryStyle.GREMLIN_UNIQUE)) {
return new GremlinUnique<>(loader, this.asAdmin().getTraversalSource(), start);
} else if (style.equals(QueryStyle.GREMLINPIPELINE_TRAVERSAL)) {
//return new GremlinPipelineTraversal(loader,start);
} else if (style.equals(QueryStyle.TRAVERSAL)) {
return new TraversalQuery<>(loader, this.asAdmin().getTraversalSource(), start);
} else {
throw new IllegalArgumentException("Query Builder type not recognized");
}
return queryBuilder;
}
public Graph startTransaction() {
if (this.tx() == null) {
this.currentTx = this.getGraph().newTransaction();
this.currentTraversal = this.tx().traversal();
this.readOnlyTraversal = this.tx().traversal(GraphTraversalSource.build().with(ReadOnlyStrategy.instance()));
}
return currentTx;
}
public void rollback() {
if (this.tx() != null) {
this.tx().tx().rollback();
this.currentTx = null;
this.currentTraversal = null;
this.readOnlyTraversal = null;
}
}
public void commit() {
if (this.tx() != null) {
this.tx().tx().commit();
this.currentTx = null;
this.currentTraversal = null;
this.readOnlyTraversal = null;
}
}
public Graph tx() {
return this.currentTx;
}
public Admin asAdmin() {
return admin;
}
public class Admin {
public GraphTraversalSource getTraversalSource() {
return currentTraversal;
}
public GraphTraversalSource getReadOnlyTraversalSource() {
return readOnlyTraversal;
}
public TitanManagement getManagementSystem() {
return getGraph().openManagement();
}
}
}
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