orientdb教程（4）-Tinkerpop-gremlin-java简单应用

参考:https://github.com/orientechnologies/orientdb-gremlin/tree/3.0.x/server/src/test/java/com/orientechnologies/tinkerpop
orientdb会基于gremlin框架风格进行功能扩展开发，但是这并不能用在移植上，所以一般应该会有使用纯gremlin开发和orintdb-gremlin两种。
一.构建图
使用orientdb-gremlin

import org.apache.tinkerpop.gremlin.orientdb.OrientGraph;
import org.apache.tinkerpop.gremlin.structure.T;
import org.apache.tinkerpop.gremlin.structure.Vertex;


public class TP3Test 
{
	public static void main(String[] args) 
	{
	    OrientGraph graph = OrientGraph.open("remote:192.168.1.32/test","root","xxx");
	    graph.createVertexClass("Person");
	    graph.createVertexClass("Animal");
	    graph.createEdgeClass("HasFriend");
	    graph.createEdgeClass("HasAnimal");

	    Vertex v1 = graph.addVertex(T.label, "Person", "name", "Jon");
	    Vertex v2 = graph.addVertex(T.label, "Person", "name", "Frank");

	    v1.addEdge("HasFriend", v2);

	    Vertex v3 = graph.addVertex(T.label, "Animal", "name", "Foo");
	    Vertex v4 = graph.addVertex(T.label, "Animal", "name", "Bar");

	    v1.addEdge("HasAnimal", v3, "marker", 10);
	    v2.addEdge("HasAnimal", v4);
	}
}

使用纯gremlin
gremlin是不会有创建createVertexClass这样的方法提供的，因为底层的数据库可以随意切换，在orientdb中叫class,但在其它数据库中就未必了，所以构建图只会增加节点Vertex,边Edge，所以需要事先创建好class。

import org.apache.tinkerpop.gremlin.orientdb.OrientGraph;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import org.apache.tinkerpop.gremlin.structure.Vertex;


public class TP3Test2 
{
	public static void main(String[] args) 
	{
		OrientGraph graph = OrientGraph.open("remote:192.168.1.32/test","root","xxx");
		//遍历对象
		GraphTraversalSource gts = graph.traversal();
		//构建图
		Vertex v1 = gts.addV("person").property("name", "marko").property("age", 29).next();
		Vertex v2 = gts.addV("software").property("name", "lop").property("lang", "java").next();
		gts.addE("created").from(v1).to(v2).property("weight", 0.4);
	}
}

二.遍历图

使用纯gremlin

import java.util.List;

import org.apache.tinkerpop.gremlin.orientdb.OrientGraphFactory;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.Vertex;


public class TP3Test4 
{
	public static void main(String[] args) 
	{
		//创建图工厂
		OrientGraphFactory factory = new OrientGraphFactory("remote:192.168.1.32/test","root","xxx");
		//返回非事务图
		Graph graph = factory.getNoTx();
		//遍历对象
		GraphTraversalSource g = graph.traversal();
		try
		{
			//outE拿到边
//			GraphTraversal<Vertex, Edge> gt = g.V().has("name","marko").outE("created");
			//拿到顶点
//			GraphTraversal<Vertex, Edge> gt = g.V().has("name","marko").outE("created").inV();
			//直接拿created的对端顶点
			GraphTraversal<Vertex, Vertex> gt = g.V().has("name","marko").out("created");
			List<Vertex> vs =  gt.toList();
			for(Vertex v:vs)
			{
//				v.toString()
				String name = v.value("name");
				System.out.println(name);
				System.out.println(v.toString());
			}
			//获取顶点的所有
//			GraphTraversal<Vertex, Object> gt = g.V().has("name","marko").out("created").values("name");
		}
		catch (Exception e) 
		{
			e.printStackTrace();
		}
		finally
		{
			if(graph != null)
			{
				try {
					graph.close();
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}
		factory.close();
	}
}

使用纯gremlin查询语句

import java.util.Iterator;

import org.apache.tinkerpop.gremlin.orientdb.OrientGraph;
import org.apache.tinkerpop.gremlin.orientdb.OrientGraphFactory;
import org.apache.tinkerpop.gremlin.orientdb.executor.OGremlinResult;
import org.apache.tinkerpop.gremlin.orientdb.executor.OGremlinResultSet;

import com.orientechnologies.orient.core.record.OVertex;
import com.orientechnologies.orient.core.sql.executor.OResult;


public class TP3Test3 
{
	public static void main(String[] args) 
	{
		test3();
	}
	public static void test3()
	{
		//创建图工厂
		OrientGraphFactory factory = new OrientGraphFactory("remote:192.168.1.32/test2","root","xxx");
		
//		//返回事务图
//		OrientGraph graph = factory.getTx();
		
		//返回非事务图
		OrientGraph graph = factory.getNoTx();
		try
		{
//			OGremlinResultSet gremlinResultSet = graph.executeSql("select from Person");
			OGremlinResultSet gremlinResultSet = graph.execute("gremlin", "g.V()", null);
			Iterator<OGremlinResult> iterator = gremlinResultSet.iterator();
			while(iterator.hasNext())
			{
				OGremlinResult gremlinResult = iterator.next();
				OResult oresult = gremlinResult.getRawResult();
				OVertex v = oresult.getVertex().get();
				System.out.println(v.toJSON());
			}
		}
		catch (Exception e) 
		{
			e.printStackTrace();
		}
		finally
		{
			if(graph != null)
			{
				graph.close();
			}
		}
		factory.close();
	}
}

三.相关pom

<!-- orientdb -->
 <dependency>
          <groupId>com.orientechnologies</groupId>
          <artifactId>orientdb-server</artifactId>
          <version>3.0.30</version>
      </dependency>
 <dependency>
  		<groupId>com.orientechnologies</groupId>
 			<artifactId>orientdb-graphdb</artifactId>
    <version>3.0.30</version>
</dependency>
<dependency>
          <groupId>com.orientechnologies</groupId>
          <artifactId>orientdb-lucene</artifactId>
          <version>3.0.30</version>
      </dependency>
      <dependency>
          <groupId>com.orientechnologies</groupId>
          <artifactId>orientdb-studio</artifactId>
          <version>3.0.30</version>
          <type>zip</type>
      </dependency>
<dependency>
    <groupId>com.orientechnologies</groupId>
    <artifactId>orientdb-core</artifactId>
    <version>3.0.30</version>
</dependency>
<dependency>
    <groupId>com.orientechnologies</groupId>
    <artifactId>orientdb-client</artifactId>
    <version>3.0.30</version>
</dependency>
<dependency>
          <groupId>com.orientechnologies</groupId>
          <artifactId>orientdb-distributed</artifactId>
          <version>3.0.30</version>
      </dependency>
      <dependency>
          <groupId>com.orientechnologies</groupId>
          <artifactId>orientdb-gremlin</artifactId>
          <version>3.0.30</version>
      </dependency>
<dependency>
   <groupId>org.apache.tinkerpop</groupId>
   <artifactId>gremlin-core</artifactId>
   <version>3.3.10</version>
</dependency>
<dependency>
          <groupId>org.apache.tinkerpop</groupId>
          <artifactId>gremlin-groovy</artifactId>
          <version>3.3.10</version>
      </dependency>
      <dependency>
          <groupId>org.apache.tinkerpop</groupId>
          <artifactId>gremlin-console</artifactId>
          <version>3.3.10</version>
      </dependency>
<dependency>
   <groupId>org.apache.tinkerpop</groupId>
   <artifactId>gremlin-driver</artifactId>
   <version>3.3.10</version>
</dependency>
<dependency>
   <groupId>org.apache.tinkerpop</groupId>
   <artifactId>tinkergraph-gremlin</artifactId>
   <version>3.3.10</version>
</dependency>