创建分布式图数据库JanusGraph对象的两种方法

1、添加Maven依赖

            <dependency>
                <groupId>org.janusgraph</groupId>
                <artifactId>janusgraph-core</artifactId>
                <version>0.2.0</version>
            </dependency>
     
            <dependency>
                <groupId>org.janusgraph</groupId>
                <artifactId>janusgraph-cassandra</artifactId>
                <version>0.2.0</version>
            </dependency>
     
            <dependency>
                <groupId>org.janusgraph</groupId>
                <artifactId>janusgraph-es</artifactId>
                <version>0.2.0</version>
            </dependency>

有以下两种方式构建JanusGraph对象

1、通过配置文件构建图对象

JanusGraph graph = JanusGraphFactory.open("janusgraph/conf/janusgraph-cassandra-es.properties");

graph.close();

2、通过Configuration构建图对象

    import org.apache.commons.configuration.BaseConfiguration;
    import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
    import org.janusgraph.core.JanusGraph;
    import org.janusgraph.core.JanusGraphFactory;
     
    public class Test {
        public static void main(String[] args) {
            BaseConfiguration config = new BaseConfiguration();
     
            ////////////使用内存作为存储端
            //config.setProperty("storage.backend", "inmemory");
     
            //////////使用cassandra+es作为存储端
            config.setProperty("storage.backend", "cassandrathrift");
            config.setProperty("storage.cassandra.keyspace", "janus");
            config.setProperty("storage.hostname", "127.0.0.1");
            config.setProperty("index.search.backend", "elasticsearch");
            config.setProperty("index.search.hostname", "127.0.0.1");
     
            config.setProperty("cache.db-cache", "true");
            config.setProperty("cache.db-cache-time", "300000");
            config.setProperty("cache.db-cache-size", "0.5");
            ;
     
            JanusGraph graph = JanusGraphFactory.open(config);
            GraphTraversalSource g = graph.traversal();
     
            //其它逻辑代码
     
            g.tx().rollback();
            graph.close();
     
        }
    }

更多参考：JanusGraph教程

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