我使用TitanDB进行新的催化处理。 我和卡桑德拉一起使用它爪哇:
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代码工作正常,我可以查询图表,进行CRUD操作等...
现在,我想在不使用JAVA的情况下查询图形。
起初我尝试使用cqlsh
,我看到了:
Keyspace titan
--------------
edgestore graphindex system_properties systemlog txlog
edgestore_lock_ graphindex_lock_ system_properties_lock_ titan_ids
在深入研究之后,我了解到我需要使用像gremlin
这样的工具来正确查询TitanDB。
但是当我想通过gremlin连接TitanDB时,我得到了这样的信息:
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)
我的问题是: 我怎样才能让Gremlin知道TitanFactory - 最后我如何在我现有的TitanDB v.5.4中使用gremlin?
感谢。
答案 0 :(得分:4)
如果您从TinkerPop网站下载了Gremlin 2.x,我希望看到您所犯的错误,因为它在类路径上没有Titan库。
您应该从thinkaurelius下载Titan 0.5.4并按照Gremlin Shell文档进行操作。