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/**
* ============LICENSE_START==========================================
* org.onap.aai
* ===================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* Copyright © 2017-2018 Amdocs
* Modifications Copyright (C) 2019 IBM
* ===================================================================
* 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.onap.aai.champcore.graph.impl;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Stream;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
import org.apache.tinkerpop.gremlin.structure.Edge;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph;
import org.onap.aai.champcore.ChampCapabilities;
import org.onap.aai.champcore.ChampTransaction;
import org.onap.aai.champcore.NoOpTinkerPopTransaction;
import org.onap.aai.champcore.exceptions.ChampIndexNotExistsException;
import org.onap.aai.champcore.model.ChampObjectIndex;
import org.onap.aai.champcore.model.ChampRelationshipIndex;
import org.onap.aai.champcore.schema.ChampSchemaEnforcer;
import org.onap.aai.champcore.schema.DefaultChampSchemaEnforcer;
public final class InMemoryChampGraphImpl extends AbstractTinkerpopChampGraph {
private static final ChampCapabilities CAPABILITIES = new ChampCapabilities() {
@Override
public boolean canDeleteObjectIndices() {
return true;
}
@Override
public boolean canDeleteRelationshipIndices() {
return true;
}
};
private final ConcurrentHashMap<String, ChampObjectIndex> objectIndices;
private final ConcurrentHashMap<String, ChampRelationshipIndex> relationshipIndices;
private final ChampSchemaEnforcer schemaEnforcer;
private final TinkerGraph graph;
private InMemoryChampGraphImpl(Builder builder) {
super(builder.graphConfiguration);
this.graph = TinkerGraph.open();
this.objectIndices = new ConcurrentHashMap<>();
this.relationshipIndices = new ConcurrentHashMap<>();
this.schemaEnforcer = builder.schemaEnforcer;
}
@Override
public ChampTransaction getOrCreateTransactionInstance(Optional<ChampTransaction> transaction) {
return new NoOpTinkerPopTransaction(getGraph());
}
public static class Builder {
private final Map<String, Object> graphConfiguration = new HashMap<String, Object> ();
private ChampSchemaEnforcer schemaEnforcer = new DefaultChampSchemaEnforcer();
public Builder() {}
public Builder schemaEnforcer(ChampSchemaEnforcer schemaEnforcer) {
this.schemaEnforcer = schemaEnforcer;
return this;
}
public Builder properties(Map<String, Object> properties) {
this.graphConfiguration.putAll(properties);
return this;
}
public Builder property(String path, Object value) {
graphConfiguration.put(path, value);
return this;
}
public InMemoryChampGraphImpl build() {
return new InMemoryChampGraphImpl(this);
}
}
protected ChampSchemaEnforcer getSchemaEnforcer() {
return schemaEnforcer;
}
@Override
protected TinkerGraph getGraph() {
return graph;
}
private ConcurrentHashMap<String, ChampObjectIndex> getObjectIndices() {
return objectIndices;
}
private ConcurrentHashMap<String, ChampRelationshipIndex> getRelationshipIndices() {
return relationshipIndices;
}
@Override
public void executeStoreObjectIndex(ChampObjectIndex index) {
if (isShutdown()) throw new IllegalStateException("Cannot call storeObjectIndex() after shutdown has been initiated");
getGraph().createIndex(index.getFields().get(0).getName(), Vertex.class);
getObjectIndices().put(index.getName(), index);
}
@Override
public Optional<ChampObjectIndex> retrieveObjectIndex(String indexName) {
if (isShutdown()) throw new IllegalStateException("Cannot call retrieveObjectIndex() after shutdown has been initiated");
if (getObjectIndices().containsKey(indexName))
return Optional.of(getObjectIndices().get(indexName));
return Optional.empty();
}
@Override
public Stream<ChampObjectIndex> retrieveObjectIndices() {
if (isShutdown()) throw new IllegalStateException("Cannot call retrieveObjectIndices() after shutdown has been initiated");
return getObjectIndices().values().stream();
}
public void executeDeleteObjectIndex(String indexName) throws ChampIndexNotExistsException {
if (isShutdown()) throw new IllegalStateException("Cannot call deleteObjectIndex() after shutdown has been initiated");
final ChampObjectIndex objectIndex = getObjectIndices().remove(indexName);
if (objectIndex == null) throw new ChampIndexNotExistsException();
getGraph().dropIndex(objectIndex.getFields().get(0).getName(), Vertex.class);
}
public void executeStoreRelationshipIndex(ChampRelationshipIndex index) {
if (isShutdown()) throw new IllegalStateException("Cannot call storeRelationshipIndex() after shutdown has been initiated");
getGraph().createIndex(index.getField().getName(), Edge.class);
getRelationshipIndices().put(index.getName(), index);
}
@Override
public Optional<ChampRelationshipIndex> retrieveRelationshipIndex(String indexName) {
if (isShutdown()) throw new IllegalStateException("Cannot call retrieveRelationshipIndex() after shutdown has been initiated");
if (getRelationshipIndices().containsKey(indexName)) {
return Optional.of(getRelationshipIndices().get(indexName));
}
return Optional.empty();
}
@Override
public Stream<ChampRelationshipIndex> retrieveRelationshipIndices() {
if (isShutdown()) throw new IllegalStateException("Cannot call retrieveRelationshipIndices() after shutdown has been initiated");
return getRelationshipIndices().values().stream();
}
public void executeDeleteRelationshipIndex(String indexName) throws ChampIndexNotExistsException {
if (isShutdown()) throw new IllegalStateException("Cannot call deleteRelationshipIndex() after shutdown has been initiated");
final ChampRelationshipIndex relationshipIndex = getRelationshipIndices().remove(indexName);
if (relationshipIndex == null) throw new ChampIndexNotExistsException();
getGraph().dropIndex(relationshipIndex.getField().getName(), Edge.class);
}
@Override
public ChampCapabilities capabilities() {
return CAPABILITIES;
}
@Override
public GraphTraversal<?, ?> hasLabel(GraphTraversal<?, ?> query, Object type) {
return query.hasLabel((String)type, (String)type);
}
@Override
public void createDefaultIndexes() {
}
}
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