hugegraph-sync/hugegraph-example/src/main/java/com/baidu/hugegraph/example/ExampleUtil.java

/*
 * Copyright 2017 HugeGraph Authors
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with this
 * work for additional information regarding copyright ownership. The ASF
 * licenses this file to You 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.
 */

package com.baidu.hugegraph.example;

import com.baidu.hugegraph.HugeFactory;
import com.baidu.hugegraph.HugeGraph;
import com.baidu.hugegraph.dist.RegisterUtil;

public class ExampleUtil {

    private static boolean registered = false;

    public static void registerPlugins() {
        if (registered) {
            return;
        }
        registered = true;

        RegisterUtil.registerCassandra();
    }

    public static HugeGraph loadGraph() {
        registerPlugins();

        String file = "hugegraph.properties";
        HugeGraph graph;
        try {
            String conf = ExampleUtil.class.getClassLoader()
                          .getResource(file).getPath();
            graph = HugeFactory.open(conf);
        } catch (Exception e) {
            graph = HugeFactory.open(file);
        }

        graph.clearBackend();
        graph.initBackend();

        return graph;
    }
}