[英]Add vertex to framed graph in OrientDB
我不確定這是 OrientDB 的問題還是操作員錯誤。 在下面的代碼中,我希望創建 Person 的新實例,但是,新頂點不會作為 Person 對象進入,而是最終出現在“V”集合中。
這已在此處部分解決,但是這是使用 TinkerGraph,而我使用的是 OrientGraph。 根據鏈接頁面中的評論,我相信我所做的應該有效。 有什么我想念的嗎?
package simpleFrames;
import com.tinkerpop.frames.Property;
import com.tinkerpop.frames.VertexFrame;
public interface Person extends VertexFrame {
@Property("firstName")
public void setFirstName(String name);
@Property("firstName")
public String getFirstName();
}
.
package simpleFrames;
import java.io.IOException;
import com.orientechnologies.orient.client.remote.OServerAdmin;
import com.orientechnologies.orient.core.metadata.schema.OType;
import com.tinkerpop.blueprints.Vertex;
import com.tinkerpop.blueprints.impls.orient.OrientGraph;
import com.tinkerpop.blueprints.impls.orient.OrientGraphFactory;
import com.tinkerpop.blueprints.impls.orient.OrientGraphNoTx;
import com.tinkerpop.blueprints.impls.orient.OrientVertexType;
import com.tinkerpop.frames.FramedGraph;
import com.tinkerpop.frames.FramedGraphFactory;
import com.tinkerpop.frames.modules.javahandler.JavaHandlerModule;
public class go {
static String remote = "localhost";
static String database = "muck";
static String username = "admin";
static String password = "admin";
static String rootPassword = "root";
public static void main(String[] args) throws IOException, InterruptedException, ClassNotFoundException {
String location = String.format("remote:%s", remote);
String fullDatabaseName = String.format("%s/%s", location, database);
OServerAdmin admin = new OServerAdmin(location);
try {
admin.connect("root", rootPassword);
admin.createDatabase(fullDatabaseName, "graph", "memory");
} finally {
admin.close();
}
OrientGraphFactory factory = new OrientGraphFactory(fullDatabaseName, username, password);
try {
OrientGraphNoTx noTx = factory.getNoTx();
try {
OrientVertexType person = noTx.createVertexType("Person");
person.createProperty("firstName", OType.STRING);
noTx.commit();
} finally {
noTx.shutdown();
}
OrientGraph graph = factory.getTx();
try {
FramedGraph<OrientGraph> framedGraph = new FramedGraphFactory(new JavaHandlerModule()).create(graph);
Person mark = framedGraph.addVertex(null, Person.class);
mark.setFirstName("Mark");
Person frank = framedGraph.addVertex(null, Person.class);
frank.setFirstName("Frank");
graph.commit();
/* Records are going in as V */
for (Vertex v : graph.getVerticesOfClass("V")) {
Person person = framedGraph.frame(v, Person.class);
System.out.println(String.format("Vertex: %s", person.getFirstName()));
}
/* They are NOT going in as Person */
for (Vertex v : graph.getVerticesOfClass("Person")) {
Person person = framedGraph.frame(v, Person.class);
System.out.println(String.format("Person: %s", person.getFirstName()));
}
} finally {
graph.shutdown();
}
} finally {
factory.close();
OServerAdmin admin2 = new OServerAdmin(fullDatabaseName);
try {
admin2.connect("root", rootPassword);
admin2.dropDatabase(database);
} finally {
admin2.close();
}
}
}
}
好吧,我已經找到了我的問題的解決方案,我將其發布在這里供下一個人使用。
打電話時...
FramedGraph<OrientGraph>.addVertex(Object id, Class<F> kind)
...第一個參數有多種用途(感謝任何能在文檔中實際找到它的人!)。 這里的 'kind' 參數實際上對使用數據庫中的哪個類來存儲數據沒有影響,而是調用應該看起來像
framedGraph.addVertex("class:Person", Person.class);
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