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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.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.lang.exception.ExceptionUtils;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.io.IoCore;
import org.onap.aai.dbgen.SchemaGenerator;
import org.onap.aai.exceptions.AAIException;
import org.onap.aai.util.AAIConstants;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import com.thinkaurelius.titan.core.TitanFactory;
import com.thinkaurelius.titan.core.TitanGraph;
import com.thinkaurelius.titan.core.schema.TitanManagement;
/**
* Database Mapping class which acts as the middle man between the REST
* interface objects and Titan DB objects. This class provides methods to commit
* the objects received on the REST interface into the Titan graph database as
* vertices and edges. Transactions are also managed here by using a TitanGraph
* object to load, commit/rollback and shutdown for each request. The data model
* rules such as keys/required properties are handled by calling DBMeth methods
* which are driven by a specification file in json.
*
*/
public class AAIGraph {
private static final EELFLogger logger = EELFManager.getInstance().getLogger(AAIGraph.class);
protected static final String COMPONENT = "aaidbmap";
protected Map<String, TitanGraph> graphs = new HashMap<>();
private static final String REALTIME_DB = "realtime";
private static final String CACHED_DB = "cached";
private static boolean isInit = false;
/**
* Instantiates a new AAI graph.
*/
private AAIGraph() {
try {
String serviceName = System.getProperty("aai.service.name", "NA");
String rtConfig = System.getProperty("realtime.db.config");
String cachedConfig = System.getProperty("cached.db.config");
if (rtConfig == null) {
rtConfig = AAIConstants.REALTIME_DB_CONFIG;
}
if (cachedConfig == null) {
cachedConfig = AAIConstants.CACHED_DB_CONFIG;
}
this.loadGraph(REALTIME_DB, rtConfig, serviceName);
this.loadGraph(CACHED_DB, cachedConfig, serviceName);
} catch (Exception e) {
throw new RuntimeException("Failed to instantiate graphs", e);
}
}
private static class Helper {
private static final AAIGraph INSTANCE = new AAIGraph();
}
/**
* Gets the single instance of AAIGraph.
*
* @return single instance of AAIGraph
*/
public static AAIGraph getInstance() {
isInit = true;
return Helper.INSTANCE;
}
public static boolean isInit() {
return isInit;
}
private void loadGraph(String name, String configPath, String serviceName) throws Exception {
// Graph being opened by TitanFactory is being placed in hashmap to be used later
// These graphs shouldn't be closed until the application shutdown
try {
PropertiesConfiguration propertiesConfiguration = new AAIGraphConfig.Builder(configPath).forService(serviceName).withGraphType(name).buildConfiguration();
TitanGraph graph = TitanFactory.open(propertiesConfiguration);
Properties graphProps = new Properties();
propertiesConfiguration.getKeys().forEachRemaining(k -> graphProps.setProperty(k, propertiesConfiguration.getString(k)));
if ("inmemory".equals(graphProps.get("storage.backend"))) {
// Load the propertyKeys, indexes and edge-Labels into the DB
loadSchema(graph);
loadSnapShotToInMemoryGraph(graph, graphProps);
}
if (graph == null) {
throw new AAIException("AAI_5102");
}
graphs.put(name, graph);
} catch (FileNotFoundException fnfe) {
throw new AAIException("AAI_4001");
} catch (IOException e) {
throw new AAIException("AAI_4002");
}
}
private void loadSnapShotToInMemoryGraph(TitanGraph graph, Properties graphProps) {
if (logger.isDebugEnabled()) {
logger.debug("Load Snapshot to InMemory Graph");
}
if (graphProps.containsKey("load.snapshot.file")) {
String value = graphProps.getProperty("load.snapshot.file");
if ("true".equals(value)) {
try (Graph transaction = graph.newTransaction()) {
String location = System.getProperty("snapshot.location");
logAndPrint(logger, "Loading snapshot to inmemory graph.");
transaction.io(IoCore.graphson()).readGraph(location);
transaction.tx().commit();
logAndPrint(logger, "Snapshot loaded to inmemory graph.");
} catch (Exception e) {
logAndPrint(logger,
"ERROR: Could not load datasnapshot to in memory graph. \n"
+ ExceptionUtils.getFullStackTrace(e));
System.exit(0);
}
}
}
}
private void loadSchema(TitanGraph graph) {
// Load the propertyKeys, indexes and edge-Labels into the DB
TitanManagement graphMgt = graph.openManagement();
System.out.println("-- loading schema into Titan");
SchemaGenerator.loadSchemaIntoTitan( graph, graphMgt );
}
/**
* Close all of the graph connections made in the instance.
*/
public void graphShutdown() {
graphs.values().stream().filter(TitanGraph::isOpen).forEach(TitanGraph::close);
}
/**
* Gets the graph.
*
* @return the graph
*/
public TitanGraph getGraph() {
return graphs.get(REALTIME_DB);
}
public void graphShutdown(DBConnectionType connectionType) {
graphs.get(this.getGraphName(connectionType)).close();
}
public TitanGraph getGraph(DBConnectionType connectionType) {
return graphs.get(this.getGraphName(connectionType));
}
private String getGraphName(DBConnectionType connectionType) {
String graphName = "";
if (DBConnectionType.CACHED.equals(connectionType)) {
graphName = this.CACHED_DB;
} else if (DBConnectionType.REALTIME.equals(connectionType)) {
graphName = this.REALTIME_DB;
}
return graphName;
}
private void logAndPrint(EELFLogger logger, String msg) {
System.out.println(msg);
logger.info(msg);
}
}
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