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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Modifications Copyright © 2018 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.dbmap;
import java.io.FileNotFoundException;
import java.util.Properties;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.lang3.exception.ExceptionUtils;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.io.IoCore;
import org.janusgraph.core.JanusGraph;
import org.janusgraph.core.JanusGraphFactory;
import org.janusgraph.core.schema.JanusGraphManagement;
import org.onap.aai.config.SpringContextAware;
import org.onap.aai.dbgen.SchemaGenerator;
import org.onap.aai.dbgen.SchemaGenerator4Hist;
import org.onap.aai.exceptions.AAIException;
import org.onap.aai.util.AAIConstants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Database Mapping class which acts as the middle man between the REST
* interface objects and JanusGraph DB objects. This class provides methods to commit
* the objects received on the REST interface into the JanusGraph graph database as
* vertices and edges. Transactions are also managed here by using a JanusGraph
* 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 Logger logger = LoggerFactory.getLogger(AAIGraph.class);
private static final String IN_MEMORY = "inmemory";
protected JanusGraph graph;
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");
if (rtConfig == null) {
rtConfig = AAIConstants.REALTIME_DB_CONFIG;
}
this.loadGraph(rtConfig, serviceName);
} catch (Exception e) {
throw new RuntimeException("Failed to instantiate graphs", e);
}
}
private static class Helper {
private static final AAIGraph INSTANCE = new AAIGraph();
private Helper() {
}
}
/**
* 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 configPath, String serviceName) throws Exception {
// Graph being opened by JanusGraphFactory 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("realtime").buildConfiguration();
graph = JanusGraphFactory.open(propertiesConfiguration);
Properties graphProps = new Properties();
propertiesConfiguration.getKeys()
.forEachRemaining(k -> graphProps.setProperty(k, propertiesConfiguration.getString(k)));
if (IN_MEMORY.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");
}
} catch (FileNotFoundException e) {
throw new AAIException("AAI_4001", e);
}
}
private void loadSnapShotToInMemoryGraph(JanusGraph 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");
logger.info("Loading snapshot to inmemory graph.");
transaction.io(IoCore.graphson()).readGraph(location);
transaction.tx().commit();
logger.info("Snapshot loaded to inmemory graph.");
} catch (Exception e) {
logger.info(String.format("ERROR: Could not load datasnapshot to in memory graph. %n%s", ExceptionUtils.getStackTrace(e)));
throw new RuntimeException(e);
}
}
}
}
private void loadSchema(JanusGraph graph) {
// Load the propertyKeys, indexes and edge-Labels into the DB
JanusGraphManagement graphMgt = graph.openManagement();
logger.info("-- loading schema into JanusGraph");
if ("true".equals(SpringContextAware.getApplicationContext().getEnvironment().getProperty("history.enabled", "false"))) {
SchemaGenerator4Hist.loadSchemaIntoJanusGraph(graphMgt, IN_MEMORY);
} else {
SchemaGenerator.loadSchemaIntoJanusGraph(graphMgt, IN_MEMORY);
}
}
/**
* Close all of the graph connections made in the instance.
*/
public void graphShutdown() {
if (graph != null && graph.isOpen()) {
graph.close();
}
}
/**
* Gets the graph.
*
* @return the graph
*/
public JanusGraph getGraph() {
return graph;
}
}
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