我正在尝试创建OrientGraph数据库的新实例,如下所示:
OrientGraph graph = new OrientGraph("local:C:/temp/graph/db");
graph.create(); //BUT no create method!!
无论如何,在坚持使用手册并使用ODatabaseDocumentTx执行此操作时:
db = new ODatabaseDocumentTx("plocal:c:/orientdb/db");
db.create();
....
db.shutdown();
然后我想得到一个类似的会话:
OrientGraphFactory factory = new OrientGraphFactory("plocal:c:/orientdb/db", "admin", "admin");
OrientGraphNoTx g = factory.getNoTx();
try
{
}
finally
{
g.shutdown();
}
我遇到以下异常:
java.lang.IncompatibleClassChangeError: Expected static method com.tinkerpop.blueprints.impls.orient.OrientBaseGraph.checkForGraphSchema(Lcom/orientechnologies/orient/core/db/document/ODatabaseDocumentTx;)
如何创建新的图形数据库???
谢谢。
答案 0 :(得分:4)
首先,您不应再使用“本地”引擎,不推荐使用它(您的第一个示例)。其次,必须清楚地记录必须创建OrientGraph的方式,请参阅http://www.orientechnologies.com/docs/last/orientdb.wiki/Graph-Factory.html
应该有效的完整示例:
@Test
public void testNoTx() {
// start with a non existing database
final OrientGraphFactory factory = new OrientGraphFactory(
"plocal:" + DB_DIR, "admin", "admin");
assertFalse(factory.exists());
try {
OrientGraphNoTx g = factory.getNoTx();
// database is auto created
assertFalse(g.isClosed());
assertFalse(g.isRequireTransaction());
} finally {
// this also closes the OrientGraph instances created by the factory
// Note that OrientGraphFactory does not implement Closeable
factory.close();
}
}
最后,您报告的错误表示一组不一致的jar文件。你应该:
需要的依赖项:
- com.orientechnologies:orientdb-graphdb:jar:2.0-M2:compile
+- com.orientechnologies:orientdb-core:jar:2.0-M2:compile
| +- org.xerial.snappy:snappy-java:jar:1.1.0.1:compile
| +- com.googlecode.concurrentlinkedhashmap:concurrentlinkedhashmap- lru:jar:1.4:compile
| +- net.java.dev.jna:jna:jar:4.0.0:compile
| \- net.java.dev.jna:jna-platform:jar:4.0.0:compile
\- com.tinkerpop.blueprints:blueprints-core:jar:2.6.0:compile
+- com.fasterxml.jackson.core:jackson-databind:jar:2.2.3:compile
| +- com.fasterxml.jackson.core:jackson-annotations:jar:2.2.3:compile
| \- com.fasterxml.jackson.core:jackson-core:jar:2.2.3:compile
+- com.carrotsearch:hppc:jar:0.6.0:compile
\- commons-configuration:commons-configuration:jar:1.6:compile
+- commons-collections:commons-collections:jar:3.2.1:compile
+- commons-lang:commons-lang:jar:2.4:compile
+- commons-digester:commons-digester:jar:1.8:compile
| \- commons-beanutils:commons-beanutils:jar:1.7.0:compile
\- commons-beanutils:commons-beanutils-core:jar:1.8.0:compile
有关完整示例,请参阅https://github.com/rmuller/graphdb-playground(在'orientdb-embedded-graph'下)
答案 1 :(得分:0)
经过与V2的疯狂挣扎后,我回到了V.1.7.9,一切正常。
Maven依赖: com.orientechnologies orientdb-graphdb 1.7.9
似乎V.2.x存在一些未解决的问题我会在一个月左右的时间内再做一次PoC。