Question

我是orient-db的新手，甚至试图打开一个简单的内存数据库也遇到了一个主要障碍。这是我的两行代码（在java中）

OrientGraphFactory factory = new  
OrientGraphFactory("memory:test").setupPool(1,10);

    // EVERY TIME YOU NEED A GRAPH INSTANCE
    OrientGraph g = factory.getTx();
    try {

    } finally {
       g.shutdown();
    }

我收到以下错误：

Exception in thread "main" com.orientechnologies.orient.core.exception.OStorageException: Cannot open local storage 'test' with mode=rw
at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.open(OAbstractPaginatedStorage.java:210)
at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.open(ODatabaseDocumentTx.java:223)
at com.orientechnologies.orient.core.db.OPartitionedDatabasePool.acquire(OPartitionedDatabasePool.java:287)
at com.tinkerpop.blueprints.impls.orient.OrientBaseGraph.<init>(OrientBaseGraph.java:163)
at com.tinkerpop.blueprints.impls.orient.OrientTransactionalGraph.<init>(OrientTransactionalGraph.java:78)
at com.tinkerpop.blueprints.impls.orient.OrientGraph.<init>(OrientGraph.java:128)
at com.tinkerpop.blueprints.impls.orient.OrientGraphFactory.getTx(OrientGraphFactory.java:74)

Caused by: com.orientechnologies.orient.core.exception.OStorageException:      
Cannot open the storage 'test' because it does not exist in path: test
at    

com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage   .open(OAbstractPaginatedStorage.java:154)
... 7 more

什么＆＃39;路径＆＃39;它在说什么？尝试打开一个简单的内存数据库时，路径是如何相关的？此外，我还尝试使用plocal：/ ..... ,,,我总是得到上述错误。

此致 Bhargav。

Answer 1

首先尝试创建数据库：

OrientGraphNoTx graph = new OrientGraphNoTx（“memory：test”）;
然后使用游泳池：

OrientGraphFactory factory = new OrientGraphFactory（“memory：test”）。setupPool（1,10）;

您使用的是哪个db版本？

Answer 2

仅在内存中创建的数据库需要首先创建，池不允许（在上一个快照中修复）。尝试从没有池的工厂中获取实例，例如：

OrientGraphFactory factory = newOrientGraphFactory("memory:test");
factory.getTx().shutdown(); // AUTO-CREATE THE GRAPH IF NOT EXISTS
factory.setupPool(1,10);

// EVERY TIME YOU NEED A GRAPH INSTANCE
OrientGraph g = factory.getTx();
try {

} finally {
   g.shutdown();
}

orient db无法打开任何类型的图表

2 个答案: