JanusGraph 是一个分布式图数据库，相对于neo4j可进行横向扩展，且存储和图引擎分离，架构优美，本文将介绍JanusGraph的两种创建方式。
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();
}
}参考：JanusGraph教程
