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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 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.onap.aai.dbmap;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import org.apache.commons.lang.exception.ExceptionUtils;
import org.apache.tinkerpop.gremlin.structure.io.IoCore;
import org.onap.aai.dbgen.SchemaGenerator;
import org.onap.aai.logging.LogFormatTools;
import com.thinkaurelius.titan.core.TitanFactory;
import com.thinkaurelius.titan.core.TitanGraph;
import com.thinkaurelius.titan.core.TitanTransaction;
import com.thinkaurelius.titan.core.schema.TitanManagement;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
public class InMemoryGraph {
private static final EELFLogger LOGGER = EELFManager.getInstance().getLogger(InMemoryGraph.class);
private TitanGraph graph = null;
public InMemoryGraph(Builder builder) throws IOException {
/*
* Create a In-memory graph
*/
InputStream is = new FileInputStream(builder.propertyFile);
try {
graph = TitanFactory.open(builder.propertyFile);
Properties graphProps = new Properties();
graphProps.load(is);
TitanManagement graphMgt = graph.openManagement();
if(builder.isSchemaEnabled){
LOGGER.info("Schema Enabled");
SchemaGenerator.loadSchemaIntoTitan(graph, graphMgt);
}
TitanTransaction transaction = graph.newTransaction();
LOGGER.info("Loading snapshot");
transaction.io(IoCore.graphson()).readGraph(builder.graphsonLocation);
transaction.commit();
} catch (Exception e) {
// TODO : Changesysout to logger
LOGGER.error(
"ERROR: Could not load datasnapshot to in memory graph. \n" + LogFormatTools.getStackTop(e));
throw new IllegalStateException("Could not load datasnapshot to in memory graph");
}
finally{
is.close();
}
}
public static class Builder {
private String graphsonLocation = "";
private String propertyFile = "";
private boolean isSchemaEnabled = false;
/*
* Builder constructor doesnt do anything
*/
public Builder() {
//Do nothing
}
public InMemoryGraph build(String graphsonFile, String propertyFile, boolean isSchemaEnabled) throws IOException {
this.graphsonLocation = graphsonFile;
this.propertyFile = propertyFile;
this.isSchemaEnabled = isSchemaEnabled;
return new InMemoryGraph(this);
}
}
public TitanGraph getGraph() {
return graph;
}
}
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