我是TitanDB的新手。我把它和卡桑德拉一起用。Java:
配置文件:storage.backend=cassandra
storage.hostname=@CASSANDRA_CLUSTER_INNER_ADDRESS@
Java代码:TitanGraph tg = TitanFactory.open(/*the configuration above*/);
if (tg.isOpen()) {
TitanManagement tm = tg.getManagementSystem();
PropertyKey key = tm.getPropertyKey(name);
/* The rest of the nice working code */
}
Java代码工作良好,我可以查询图形,做CRUD操作等…
现在,我想在不使用JAVA的情况下查询图。一开始我尝试使用cqlsh
,我看到了这个:
Keyspace titan
--------------
edgestore graphindex system_properties systemlog txlog
edgestore_lock_ graphindex_lock_ system_properties_lock_ titan_ids
在挖掘之后,我明白我需要使用gremlin
这样的工具来正确查询TitanDB。但是当我试图通过gremlin连接TitanDB时,我得到了这个消息:
gremlin> TitanFactory.open("cassandra.local")
No such property: TitanFactory for class: groovysh_evaluate
Display stack trace? [yN] y
groovy.lang.MissingPropertyException: No such property: TitanFactory for class: groovysh_evaluate
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:50)
at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(PogoGetPropertySite.java:49)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjectGetProperty(AbstractCallSite.java:231)
at groovysh_evaluate.run(groovysh_evaluate:51)
at groovysh_evaluate$run.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
at groovysh_evaluate$run.call(Unknown Source)
at org.codehaus.groovy.tools.shell.Interpreter.evaluate(Interpreter.groovy:67)
at org.codehaus.groovy.tools.shell.Interpreter$evaluate.call(Unknown Source)
at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:152)
at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:114)
at org.codehaus.groovy.tools.shell.Shell$leftShift$0.call(Unknown Source)
at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:88)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1079)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:128)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:148)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:100)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:272)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:137)
at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:57)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1079)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:128)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:148)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:66)
at com.tinkerpop.gremlin.groovy.console.Console.<init>(Console.java:60)
at com.tinkerpop.gremlin.groovy.console.Console.main(Console.java:102)
问题是:我如何让Gremlin知道TitanFactory -最后我如何在我现有的tiandb v. 0.5.4上使用Gremlin ?
谢谢。
如果你下载了Gremlin 2。在TinkerPop站点中,我希望看到您所看到的错误,因为它的类路径中没有Titan库。
您应该从thinkaurelius下载Titan 0.5.4,并遵循Gremlin Shell文档。
http://s3.thinkaurelius.com/docs/titan/0.5.4/getting-started.html _downloading_titan_and_running_the_gremlin_shell